Freshwater Aquculture Research Papers - Academia.edu (original) (raw)

2025

ABSTRAK Ikan patin (Pangasius sp.) merupakan komoditas penting dalam akuakultur air tawar yang memiliki nilai ekonomis tinggi. Penelitian ini bertujuan untuk mengukur pertumbuhan dan kelangsungan hidup ikan patin yang dibudidayakan dalam lingkungan terkontrol menggunakan dua galon dengan kondisi berbeda (Galon A dan Galon B). Hasil menunjukkan bahwa Galon B menghasilkan pertumbuhan panjang mutlak rata-rata 1,71 cm dan bobot mutlak rata-rata 2,31 gr, lebih tinggi dibandingkan Galon A yang masing masing mencapai 0,83 cm dan 1,17 gr. Survival rate ikan di Galon B mencapai 100%, sedangkan di Galon A sebesar 80%. Faktor yang memengaruhi perbedaan ini meliputi kualitas air, seperti suhu, pH, dan manajemen pemeliharaan yang lebih optimal di Galon B. Suhu berkisar 26-31°C dan pH 6,5-8,7 di Galon B mendukung pertumbuhan dan kelangsungan hidup yang lebih baik. Penelitian ini menekankan pentingnya pengelolaan kualitas air dan pemberian pakan yang tepat untuk meningkatkan produktivitas budidaya ikan patin.

2025

This research aims to investigate the effect of golden apple snail (Pomacea canaliculatae) supplementation on the gonadal productivity of female Sangkuriang catfish. The experiment was conducted in the Wet Laboratory and Basic Laboratory of the Faculty of Fisheries, University 45 Mataram. The study involved the provision of fresh golden apple snail meat as additional feed at varying percentages. Gonadal productivity parameters observed in this research included gonadal maturity index (GMI), egg diameter, gonadal maturity level (GML), and fecundity. The experimental design employed a completely randomized design with four treatments, namely P1 (Pellet 3% + snail 4%), P2 (Pellet 3% + snail 7%), P3 (Pellet 3% + snail 10%), and P4 (Pellet 3%), each with three replications. The results indicated that the supplementation of golden apple snail as additional feed could stimulate the gonadal productivity of female Sangkuriang catfish. The enhanced GML, egg diameter, and GMI values demonstrated that golden apple snail can be utilized as supplementary feed for female Sangkuriang catfish.

2025, Boletín de Investigaciones Marinas y Costeras

Se realizó un cultivo piloto de macroalgas en bahía Portete, La Guajira, Colombia, entre julio de 2005 y junio de 2006, con el fin de evaluar la factibilidad de implementarlo como alternativa productiva para las comunidades costeras de la región. Se sembraron 114 kg de las algas rojas Gracilaria cervicornis, Hydropuntia cornea, Hypnea musciformis y Grateloupia sp. sobre cuerdas de polipropileno y mallas cilíndricas en dos lugares de la bahía. La especie G. cervicornis tuvo tasas de crecimiento relativo (TCR) entre 0.1 % día-1 y 1.22 % día-1, con promedio de 0.44 % día-1, fuerte epifitismo y altas tasas de pérdida. La especie H. cornea presentó un promedio de TCR de 0.91 % día-1 y osciló entre 0.02 % día-1 y 3.5 % día-1 en el sitio uno, mientras que en el sitio dos el promedio de TCR fue de 0.97 % día-1 con ámbito entre 0.03 % día-1 y 4.1 % día-1 con el valor más alto observado en febrero de 2006. Los fragmentos de menor tamaño presentaron las mayores TCR e incremento de biomasa con respecto a los fragmentos de mayor peso. Las macroalgas H. musciformis y Grateloupia sp. no se ajustaron a los sistemas de cultivo debido a su fragilidad. Por otro lado, los factores ambientales temperatura y salinidad tuvieron alta variación en el tiempo, pero no presentaron correlación con las TCR. Sin embargo, en la época seca cuando se registró la menor temperatura y un incremento en los nutrientes debido al evento de surgencia históricamente documentado, se observaron las TCR más altas y una reducción en la carga de epífitos. Es probable que diferentes factores, como el movimiento del agua, concentración de nutrientes, temperatura, salinidad, herbivoría y epifitismo, tengan influencia en el crecimiento de las macroalgas. Es necesario realizar una completa caracterización de los parámetros fisicoquímicos y hacer experimentos enfocados a disminuir la incidencia de los diferentes factores ambientales y biológicos para tener un conocimiento real de la productividad de la bahía que, a juzgar por los mayores valores de TCR encontrados, tiene potencial para cultivos de algas incorporando mejoras tecnológicas en las actividades de maricultura.

2024, Aquaculture Journal

Ikan patin siam (Pangasius hypophthalmus) merupakan jenis ikan air tawar potensial yang telah lama diintroduksi dari Thailand ke Indonesia sejak tahun 1972 (Sunarma, 2007). Kandungan protein pada ikan patin sebesar 16,58%, dinilai lebih aman untuk kesehatan karena kadar kolesterolnya rendah dibanding daging ternak (Fariedah et al., 2018). Selain bernilai ekonomis tinggi, ikan patin siam juga mudah dibudidayakan dan dapat dipelihara pada kondisi perairan dengan kadar oksigen terlarut yang rendah. Telah dilakukan Berbagai upaya untuk meningkatkan produktivitas induk patin agar menghasilkan benih yang lebih baik dan tumbuh lebih cepat, salah satunya dengan melakukan perbaikan genetika (pembibitan). Pustina merupakan varietas baru yang memiliki kelebihan pertumbuhan yang cepat hingga dua kali lipat. Tidak hanya pertumbuhan cepat, patin Pustina juga lebih kuat dibandingkan ikan patin umumnya (KKP, 2021). Masalah yang sering dihadapi adalah terhambatnya pertumbuhan ikan yang disebabkan oleh perubahan lingkungan secara mendadak yang menyebabkan ikan mudah menjadi stress dan nafsu makan berkurang. Perlu upaya agar ikan patin ini tahan terhadap perubahan lingkungan, sehingga pertumbuhan dan kelangsungan hidupnya meningkat. Salah satu fitofarmaka yang bisa dijadikan sebagai antimikrobial adalah temulawak yang berperan sebagai imunostimulan yang dapat meningkatkan pertumbuhan, daya tahan dan nafsu makan pada ikan (Monoarfa et al., 2020) Minyak asitri dan kurkumin yang terkandung dalam temulawak berkhasiat merangsang sel hati untuk meningkatkan dan melancarkan produksi dan sekresi empedu, sehingga pencernaan meningkat dan pengosongan lambung lebih cepat (Ananda et al., 2015).

2024

El citado proyecto de 1971 estudio la compatibilidad de dichas algas cultivadas con nuestros Cultivos de Corales en el Golfo de Carenero (Revista de Ciencia Tecnología y Conservación MN. Loc. Janis Kleinbergs

2024, Indonesian Journal of Limnology

A total of 30 fish species from 14 families were recorded during the survey at selected headwater streams of Belum Forest Reserve of Temengor Reservoir between June to December 1998. Family Cyprinidae was the dominant family which contributed 46.7% followed by Channidae (10.7%) and Bagridae (6.7%). Out of 30 species, only four species such as Devario regina, Rasbora paviana, Osteochilus hasselti and Hampala macrolepidota were sampled from all sampling stations. One specimen of freshwater puffer fish, Poa leiurus, was recorded at Sungai Ta eng. Distance, water velocity, river depth, types of substrate and physio-chemical parameter played an important role in determining species composition, diversity, biomass and species distribution. As there are many headwater streams in Temengor Reservoir still unexplored, the fish species number at Temengor Reservoir assume higher than been recorded before.

2024, MB International Media and Publishing House

Fish farmers in eastern India, consider it to be a species of choice for diversifying their cultural
practice since it provides them with a considerable return on their investment. The natural seeds of
Magur have been sharply declining due to ecological imbalance in their natural breeding ground,
which is low lying paddy field. This imbalance is caused by the indiscriminate use of chemical
fertilizer and chemical pesticides. However, the availability of Magur seeds in desired hours of
stocking in desired quantity stands as a constraint to the propagation of culture of this species. It is
consequently the only method that is feasible to reduce the severity of the issue, and that is to
induce breeding of the species in captivity. There have only been a few models designed for the
purpose of reproducing Magur in captivity, but each of these models involves a significant amount
of financial investment. However, a labor-intensive and low-cost farmers'-friendly model for the production of small quantity seeds has not yet been standardized for rural small scale fish farmers.
In this paper we found that magur seed production can be done through low cost investing, that’s
why farmers or rural people get more economic profit. The study demonstrates how specific
breeding techniques and management practices can significantly enhance seed production,
contributing to the sustainability of Magur aquaculture in India.

2024, Journal of Krishi Vigyan

The study was conducted to evaluate the growth performance of Channa striata during highdensity farming in artificial tanks. The fish reached an average weight of 420.28± 30.5 g and a length of 35.07± 5.5 cm in 250 days when fed with a formulated diet. The total production was 2 235.5 kg from an area of 12.6 m during 250 days. The feed conversion ratio was 1.8, and the average production cost per kg was Rs.312/Kg. Though the ammonia level was as high as 9.6-11 mg/l, a higher survival percentage of 97 was recorded. The ability of Channa striata to overcome high ammonia levels and lower oxygen levels makes it compatible with high-density farming. It can also be farmed in artificial tanks. This fish can accept formulated feed during all stages of growth. Among the various issues reported by the farmers, marketability was the primary issue.

2024, International Journal of Fauna and Biological Studies

Aquaculture sector provides Food, Employment and Prosperity to the people. The vast area of water resources available in the country provides huge scope for expansion of aquaculture for the production of finfish and shellfish. In order to enhance farmers’ income, there is a need to increase farm productivity through technological interventions, improve market access, and also to develop the industrial and service sectors to support various farmer activities in terms of marketing and processing of their produce and other requirements in terms of self-employment/employment in farming sector. The farmers can realize the doubling of their income within a contemplated period of five years by implementing recommended technologies in the farming system and reap the consequent social and ecological benefits.

2024

The current study attempts to compared the academics performance ofexperimental (e-learning) and control group (Classroom) of National Diploma I and II (ND I and II) students participated in learning Calculus course in Kebbi state polytechnic Dakingari, Umaru Ali Shinkafi polytechnic Sokoto, and Abdu Gusau polytechnic Talata-Mafara.The total population of the participants in this study was one hundred and forty nine (149) students from the three aforementioned tertiary institutions randomly selected. Eighty one (81) students participated as experimental group and Sixty eight (68) students as control group in all the three (3) selected tertiary institution. The data were collected using 20 items essay test questions with reliability coefficients of0.76 and was analysed with SPSS-V21 using independent sample t-test after sixteen (16) weeks of continuous treatment. The study were guided by one (1) research question and one (1) null research hypotheses (Ho) at significance alpha value 0.05. The groups were exposed to pre-test before the actual commencements of the treatments. The result of the post-test revealed that,the calculated pvalues of the experimental and control group of the students participated in learning Calculus in Umaru Ali Shinkafi polytechnic Sokoto was higher than the alpha-value 0.05, p-val = 0.241 (0.241 > 0.05), the null hypotheses decision were accepted. However, the opposite results was obtained in Kebbi state polytechnic Dakingari and Abdu Gusau polytechnic Talata-Mafara in which the p-values are less than the alpha-value 0.05, P-val = 0.004 (0.004 < 0.05) and P-val = 0.012 (0.012 < 0.05) respectively, therefore, the null hypotheses was rejected. Finally, out of three (3) selected polytechnics in this study, the null hypotheses was failed to be accepted after the independent sample t-test in the two (2) polytechnics, we drawn a conclusion that there is significance difference on the polytechnic students that learn Calculus using e-learning and others using classroom approach.The study concluded that there is significant difference between the experimental and control group students that learned Calculus using e-learning and others using traditional (classroom) method in the polytechnics learning system.

2024

In spite of vast diverse fish genetic resource of India, several exotic species have been introduced into India. Chinese carps which were introduced in India with an objective of increasing the yields in aquaculture has paved way for composite fish culture in India. Introduction of exotic species for fisheries and aquaculture was successful in some instances while in few situations, it failed leading to controversy over protection of native biodiversity. Pangasius (Pangasianodon hypophthalmus) an exotic species has been introduced into India and is not only adopted for culture in states like West Bengal and Andhra Pradesh but also established as an alternative candidate species in freshwater aquaculture. Fish seed production segment in West Bengal played a pivotal role in the expansion of Pangasius farming in Andhra Pradesh. Pangasius monoculture was found to be profitable in comparison to polyculture with carps and other fishes. Use of formulated feeds is the major choice of Pangasius farmers. Pangasius catfish is less prone to diseases when compared to carps and is sensitive to abiotic stress. Comparatively, low market value of Pangasius than carps has increased avenues of fish consumption by low income consumers. Very fast development in culture of Pangasius has created many challenges such as dearth of quality seed, inconsistent management practices, prevalence of stress induced diseases, glut in the market and acute decline in the farm gate price leading to stabilization of farming area in Andhra Pradesh. Pangasius farming in Andhra Pradesh is sustaining due to strategic stocking and harvesting pattern adopted by the farmers conforming to market trend. Inappropriate practices in order to achieve higher yields and input-specific technical inefficiency are associated with the economic losses while minimizing the use of inputs can reduce risk factors in Pangasius farming. It is important to record that demand for carp culture in Andhra Pradesh is still greater in spite of less complications underlying in Pangasius farming and management.

2024

The diversification of production, by the domestication of ew fish species, is one of the possible solutions for sustainable aquaculture. In this context, the farming of the Eurasian perch, Perca fluviatilis, has developed well in recent years allowing today a stable and increasing production. The progress of the sector requires, among others, the establishment of breeding programs to improve, growth, reproduction and disease resistance. For this, the genetic characterization of currently farmed fish stocks is an essential prerequisite to assess whether genetic variation is sufficient. In this work, we analyzed the genetic variability among wild populations of two alpine lakes (lakes Geneva and Neuchâtel) whose populations are used by fish farmers to establish their stocks. We found one panmictic population in Lake Geneva, while two sub-populations were identified in Lake Neuchâtel, whose genetic variability is higher. However, those wild populations are not found in captive stocks. In addition, the genetic variability is higher in captive populations. Between parents and their offspring, the genetic diversity has not decreased despite a small increase in inbreeding. Thus, this work will allow fish farmers to set up a real genetic management of their stocks and subsequently to develop breeding programs. Moreover, it provides a better understanding of the possible links between the process of domestication and the evolution of genetic variability.

2024

La diversification de la production, par la domestication de nouvelles especes de poissons, constitue l’une des solutions pour une aquaculture durable. Dans ce contexte, l’elevage de la perche Eurasienne, Perca fluviatilis, s’est bien developpe ces dernieres annees permettant aujourd’hui une production stable et croissante. Le progres de la filiere requiert, la mise en œuvre de programmes de selection genetique pour ameliorer, entre-autres, la croissance, la reproduction, et la resistance aux maladies. Pour ce faire, la caracterisation genetique des stocks de poisson actuellement en elevage est un pre-requis indispensable afin d’evaluer si la variabilite genetique est suffisante. Au cours de ce travail, nous avons analyse la variabilite genetique entre les populations sauvages de deux lacs alpins (lacs Leman et Neuchâtel) dont les populations sont utilisees comme fondatrices par les perciculteurs et les stocks de deux fermes d’elevage. Nous avons trouve une seule population panmicti...

2024

The pearl spot Etroplus suratensis the State Fish of Kerala i s an indigenous cichlid fish distributed along the east and west coasts of India. The pearl spot wealth was about 2,000 tonnes in 2001 in Kerala. In 20 1 I , it decreased to about 300 to 350 tonnes. In addition to its high demand in the local market it has good export market also. Pearl spot i s farmed using wild seeds in traditional ponds in Kerala. The average production i s about 1 000 kg/ha/year over 8-10 month grow-out period. Pond culture i s not recommended for large scale production of the fish. However, culture of this species in cages has shown its potential for monoculture and polyculture with other brackishwaterfishes. Cage culture i s the most suitable method to enhance pearl spot production.

2024, International Journal of Fauna and Biological Studies

Captive breeding of Indian Magur has been standardized in the last decade. But, low-cost farmersfriendly model is yet to be standardized. One such on-farm trial was carried out at community level with necessary refinement of the existing technology where 5056 numbers of 1 inch Magur seeds were produced successfully in 29 days with 91.9% survival in the month of July, 2018 from one pair brood with 94% fertilization rate and 97.5% hatching rate. The result showed the model can be up-scaled. This paper deals with the detail of that model.

2024, Annals of Forest Research

Moustached danio, Danio dangila (Hamilton, 1822), is a potential
ornamental fish of India, but the stock of this endemic Cyprinid is declining in the wild due to environmental variation and anthropogenic activities. Therefore, the present work on captive breeding and larval rearing was undertaken to conserve this species. During the investigation, live fishes were brought from Assam (North-East Indian region) to ARTP, Chennai, Tamil Nadu. Initially, the species were tried to breed through environmental manipulations, but the species did not respond in captivity. In experiment 1, trials to breed the species using the synthetic hormone WOVA-FHTM were undertaken and revealed the highest spawning (1002.50±52.6), fertilization (84.0±2.72%) and hatching rate (86.5±2.9%) after intraperitoneal injection at 0.5 ml/kg for females and 0.3 ml/kg for males (T3). In experiment 2, larval rearing in nursery raceways and FRP tanks at different stocking densities for 45 days showed that the RAS-based nursery raceways produced the highest survival (91.79±1.67%) and specific growth rate (0.13±0.001%/day) at 30 numbers/L stocking density. This investigation standardized the breeding and larval rearing protocol in advanced aquaculture systems and has significant implications for the conservation, nutritional security and seed production of the species.

2024, Revue Marocaine des Sciences Agronomiques et Vétérinaires

The goal of this study is to evaluate the effect of the inulin and fructooligosaccharides on growth and response to chronic stress of pikeperch juveniles (Sander lucioperca). Four treatments of two rates (10 and 20 g/kg of food) of these two feed additives were tested in three replicates using experimental feed granules on fishes of medium initial weight of 14,6 ± 0,4 g by and comparing them to two control groups (stress and no stress controls). For all treatments, the feed is composed of animal and vegetal meal having protein and fat contents of respectively 40,1 and 12,0%. As the goal was to evaluate if administration a prebiotic could limit the effects of chronic stress, the first stress was applied at day 7, and every week thereafter up to day 36, a total of five manipulations of pond drying. After 36 days of feeding, growth and physiological parameters were assessed. Comparatively to control fish, pond drying stress had no significant effect on fish growth rate. However, signif...

2024, Aquaculture Asia

go from Kolkata followed by 8% from Mumbai and 2% from Chennai. In the state of West Bengal there are more than 2000 people involved in this trade including ornamental fish breeders, growers, seed and live food collectors, traders and exporters (Fig. 1). About 150 families are involved in ornamental fish farming to maintain their livelihood. More than 500 families use it as an additional income generating business.

2024, PARIPEX-INDIAN JOURNAL OF RESEARCH

This review was meant to foster a brood supply of Magur (Clarias batrachus), counterfeit rearing, and seed creation under hostage conditions. Fifteen sets of brood C. batrachus were used in the trial. The farm raised the broodfish until they were mature enough to spawn by feeding them artificial food for four to five months prior to the beginning of the breeding season. In this analysis, the broodfish were actuated with WOVA-FH (1 ml.kg-1 body weight) and HCG (2272 IU.kg-1 body weight) hormones. The broods were given a single infusion of all the medicines. The review was directed at the initiated production of magur (Clarias batrachus) at Sanjeev Agrawal Global Educational (SAGE) University, Bhopal, from March to August 2022. Physically full-growth, sound, healthy male and female fish were collected from the brood stock lakes for prompt reproduction. The fish were then moved to clean, microbe-free molding tanks for 7-8 hours. During molding, a consistent glimmer of water was given by keeping the male and female isolated. The fish were then independently gauged and infused intramuscularly with WOVA-FH and HCG hormones. Only females were infused at a 45° point in the caudal locale. Approximately 23-24 hours postinfusion, the testicles from the male fish were removed and blended with stripping eggs for treatment. The brooding time frame for the prepared eggs was 23-30 hours for each of the medicines. The fertilization rates were 73.22±11.32 and 84.22±6.24%, and the hatching rates were 78.53±12.12 and 86.79±6.94% for the WOVA-FH and HCG treatments respectively.

2024

Flow of rivers become impeded and are regulated due to construction of dam. This brings about change in abiotic and biotic factors compared to unregulated river. The post-impoundment physical, chemical and biological parameters of the parent river Tawi (upstream, within reservoir and downstream) were analysed for the first time and data thus generated was compared to reveal influence of dam on this regulated river. It was observed that the water temperature, pH, transparency and carbon dioxide content of the parent river were influenced by the dam and significant differences in these parameters were observed among the main zones sampled. The zooplanktonic community of river Tawi was also influenced by variations in abiotic features and its highest planktonic diversity was recorded in reservoir (lentic zone) of dam due to reduced water current, higher transparency and long resident time where as downstream river exhibited low diversity due to lotic conditions.

2024, ACCL Bioflux

The study of the length-weight relationship and condition factor is a fundamental component of fisheries management. Trichopodus trichopterus (Pallas, 1770) is a native species of Indonesia, used as food and aquarium fish. The purpose of this study was to analyze the length-weight relationship and condition factor of T. trichopterus from Ogan Ilir peat swamp, South Sumatra, Indonesia. A total of 85 samples were used in this study. The results showed that the length-weight relationship of the T. trichopterus, the predictive model of the weight of the fish from the length of the fish is in the exponential form with the equation y=0.0207x L 2.8607 (R 2 =0.84, p<0.01), with an a coefficient of 0.0207 and a b constant of 2.86. The current study hopes to provide the first baseline data about the length-weight relationship and condition factor of T. trichopterus from the Ogan Ilir peat swamp. The data obtained are very useful for the sustainable management of this resource.

2024, International Journal of Fauna and Biological Studies

2024, Research in Agriculture Livestock and Fisheries

The study was conducted in a peri-urban village named, Panchpy under Gafargaon upazila of Mymensingh district with stinging catfish (Heteropneustes fossilis ) and carps ponds to produce aquaponics vegetable kolmi (water spinach, Ipomoea aquatica ) towards using waste substances of intensive stinging catfish ponds. Aquaponic plant (water spinach, Ipomoea aquatica ) was grown in floating trays in the selected ponds. The water quality parameters including, temperature, pH, dissolved oxygen, nitrite and ammonia were measured during study period.The level of ammonia was higher in catfish pond compared to carps pond water. Inversely, the dissolved oxygen content of catfish pond water was lower than that of carps pond. In the stinging catfish pond, the mean value (± SE) of plant length, weight, number of branches and leaves were recorded at 27.67 ± 1.76, 62.67 ± 2.03, 13.00 ± 1.15 and 55.33 ± 3.18, respectively. The corresponding values 19.33 ± 1.45, 46.67 ± 1.86, 9.33 ± 1.45 and 43.00 ± 2...

2023, Journal of Tropical Biodiversity and Biotechnology

Indonesian leaffish Pristolepis grooti, an endemic species, are distributed in the region of Sumatra, Riau, Bangka Belitung and Kalimantan. However, there has been a decline in the population recently. This research purposed to investigate the mitochondrial DNA cytochrome c oxidase subunit I (COI) gene, the genetic distance, the genetic tree of the leaffish and characterize the chemical physics of water of its habitat in the Kelekar River Muara Enim Regency and the Ogan River, Ogan Ilir Regency. The method used in species authentication was DNA isolation, amplification using PCR (Polymerase Chain Reaction) and sequencing of COI gene. The size of the COI mtDNA gene fragment was 704 bp (PM 1, PM 4, PP 2 and PP 4) and 723 bp (PM 2, PM 3, PP 1 and PP 3). A cryptic diversity of the species P. grooti is found based on the genetic distance value of 4.5-6%, both in the Kelakar and Ogan Rivers. The phylogenetic tree of the leaffish of this study formed 2 separate sub-clusters with a bootstra...

2023, Indian Journal of Fisheries

The performance of hatchery-produced and pellet-feed-weaned fingerlings of striped murrel, Channa striata (Bloch, 1793) was assessed in the biofloc tanks for growth and survival, in a subtropical climate. The rearing was undertaken in two phases with an increase in fish size. In the first phase, fingerlings (weight 1.94±0.71 g, length 6.29±0.81 cm) were stocked @ 200 m-3 in the biofloc tanks, which were reduced to 15 m-3 in the second phase using the same stock. The fish attained a length of 25.44±1.81 cm and weight of 149.60±28.58 g in 10 months with overall survival of 93% at the end of the second phase. The total fish biomass recorded was 9.7 kg m-3 at the final harvest. The growth parameters were found temperature-dependent, which recorded 15±1.0 to 28±1.5ºC and 'W' values were found to follow Fulton's cube law during the entire culture period. The exponent (b) of 3.278 was recorded as the highest in July 2020 and lowest at 2.210 in December 2020. The lowest R2 was ...

2023

Adoption of Scientific Management Practices (SMPs) is imperative for increasing production and productivity in fish farming. From pond preparation to harvesting fish, the Research and Development Institutions have disseminated technologies and techniques for the benefit of farmers and it is understood that adoption varies from farmer to farmer based on their capacity, willingness and the robustness of the practice. Among the different SMPs in fish farming, water quality management is one of the key practices that determine the success of fish farming. This study was conducted with the objective of assessing the advisory role of Krishi Vigyan Kendra (KVK)-Khordha in promoting water quality management practices through its soil and water testing laboratory. Twenty beneficiaries of the KVK from three districts of Odisha were selected for the study. The results indicated that majority of the farmers have never tested water samples before and tested for the first time at KVK. Further, the sources of information for testing water were found to be limited. The study also concluded that the major reason for testing water was towards understanding the manuring and fertilization schedule. Most of the farmers tested their water before stocking and also fully adopted the recommendations provided by KVK. The study suggests more intensive efforts by development agencies to organize different campaigns and use of the other extension methods to sensitize the adoption of water quality management practices with a larger impact.

2023, Indian Journal of Animal Research, Volume 57 Issue 11: 1462-1468 (November 2023)

Background: With remarkable growth in aquaculture, the need for system diversification and species diversification has been
demanded by the producers to gain fruitful output in terms of profit. Striped murrel, Channa striata has been identified as a suitable
species for modern aquaculture systems in terms of species diversification due to their fast growth rate, air-breathing nature, higher
market price and consumer acceptance. The major bottlenecks in seed production of murrel are captive maturation and short
spawning window. To overcome these problems, an attempt was made to achieve early gonadal maturity of striped murrel in captive
conditions by intervening in the brooder rearing habitat.
Methods: In this regard, four habitats were tested in duplicates, namely T1 - Tank with clean reservoir water without macrophytes
and soil base, T2 - Tanks provided with floating (Water hyacinth, Eichhornia sp) and submerged (Waterthyme, Hydrilla sp) aquatic
macrophytes without any soil base, T3- Tanks provided with only soil base (15-20 cm) without any macrophytes and T4 - Tanks
provided with both soil base and macrophytes.
Result: At the end of the three-months rearing phase, the fishes provided with macrophytes and soil base (T4) resulted in early
maturation characterized by an egg size of around 1.29±0.21 mm and the majority of late granular stage oocytes and spermatozoa
in ovary and testes, respectively. The results concluded that providing a bottom soil base of 15-20 cm and covering the 20-30%
water spread area using aquatic macrophytes in the brood rearing tank helped in the gonadal maturation of striped murrel during
pre-monsoon in captive conditions.

2023, Revue Marocaine des Sciences Agronomiques et Vétérinaires

L'objectif de cette étude est d'évaluer l'effet de l'inuline et des fructooligosaccharides sur le taux de croissance et la réponse au stress chronique chez les juvéniles du sandre (Sander lucioperca). Ainsi, quatre traitements constitués de deux doses (10 et 20 g/ kg d'aliment) de ces deux additifs alimentaires ont été testés en triplicat via des granulés expérimentaux sur des poissons de poids moyen initial 14,6 ± 0,04 g en comparaison à deux groupes témoins (témoin stressé et témoin non stressé). Pour tous les traitements, l'aliment est constitué de farines animales et végétales avec des teneurs en protéines brutes et lipides respectivement de 40,1 et 12,0%. Étant donné que l'objectif est d'évaluer si l'administration de prébiotiques pouvait limiter les effets de la réponse au stress chronique, le premier stress a été appliqué à J7, puis par la suite une fois par semaine jusqu'à J36, soit au total 5 manipulations d'exondation. Après 36 jours de nourrissage, les paramètres de croissance et physiologiques ont été déterminés. Comparativement aux poissons témoins, le stress d'exondation n'a pas eu d'effet significatif sur la vitesse de croissance. Cependant, des différences significatives ont été observées à partir de 20 g/kg d'aliment au niveau du traitement à l'IN2 avec des valeurs de GP (%) et SGR (%/j) plus élevées que les autres traitements. Quant aux paramètres physiologiques, le niveau de cortisol était plus élevé chez les témoins stressés comparativement à tous les autres groupes, mêmes ceux nourris aux prébiotiques. Cependant, les prébiotiques ont significativement limité l'augmentation du cortisol indiquant une influence positive des prébiotiques sur la réponse au stress. Au vue de ces résultats, il serait souhaitable par les études supplémentaires de tester d'autres doses afin de déterminer le taux d'incorporation optimal de prébiotiques dans l'alimentation des juvéniles de sandre pour mieux limiter les effets de stress.

2023

A checklist of all freshwater fish species demonstrated to occur in Paraguay is presented with the aim of providing an updated list of all known fishes from Paraguay and to establish a baseline to keep the inventory updated. Species listed herein are only those that appear in published papers based on actual collection records. Type localities are provided for primary types of species originally described from Paraguay. For each species, the current name combination is followed by a list of synonyms, beginning with the original name combination, and followed by a list of literature citations for the Paraguayan territory. A total of 307 fish species were confirmed and listed, four of which are categorized as threatened, and including four introduced exotic species. Two thirds of the species belong to the Characiformes and Siluriformes, among the twelve orders and 39 families listed. A description of the hydrographic systems of Paraguay as well as an overview of the history of the ichthyology in Paraguay are also presented.

2023, International Journal of Progressive Sciences and Technologies

The Indonesian leafffish (Pristolepis grootii, Bleeker 1852) is one of the native Indonesian freshwater fish species. It's have a high economic value. The habitat of the fish is rivers, lakes and swamps. The study of the length-weight relationship and environmental parameters an important and fundamental component of fisheries resource management. The purpose of this study was to analyze length-weight relationship of P. grootii and water quality of the fish habitat. A total of 164 samples were used in this study. The results showed that length-weight relationship of the P. grootii, the predictive model of the weight of the fish from the length of the fish is in the exponential form with the equation y = 0.0491x2.6363 (R2 = 0.9536: P < 0.01), with a coefficient of (a) 2.636 and a constant (b) of 0.049. The P. grootii weight gain was slower than the increase in length. Environmental parameters such as water temperature, dissolved oxygen, alkalinity, nitrate, and phospate are within acceptable limits. P. grootii are found in Kelekar river. The current study provided the first baseline data about length-weight relationship and environmental parameters of P grotii from the the Kelekar river, Ogan Ilir Regency, South Sumatra, Indonesia. Such data is valuable for establishing a monitoring and management system of these fish species.

2023, International Journal of Current Microbiology and Applied Sciences

2023

Farmers of Forty Centuries. Via Wikimedia Commons. 9 Pearl Buck, whose famous title inspired the more sardonic one of this essay, is worthy of more attention by American and Chinese historians. Born Pearl Sydenstricker in 1892, she was the daughter of Southern Presbyterian missionaries who took her to Anhui and Jiangsu provinces, including the grand old city of Nanjing, where she spent more than three decades. Eventually she married the agricultural economist John Lossing Buck, but in 1934, in the midst of religious and political turmoil, left her husband and China for the United States. In 1938 she was awarded the Nobel Prize in Literature.

2023

1. Fish Genetics and Biotechnology Division, ICAR-Central Institute of Fisheries Education, Mumbai400061; 2. Aquaculture Production and Environment Division, ICAR-Central Institute of Freshwater Aquaculture, Bhubaneswar 751002, Odisha; 3. ICAR-Central Institute of Fisheries Education, Kolkata Centre, Kolkata, West Bengal-700091; 4. ICAR-Research Complex for NEH, Tripura Centre, Lembucherra, Tripura-799001. *Corresponding author: sonal.fbtpa801@cife.edu.in

2023, Latin American Journal of Aquatic Research

The carp polyculture production system is the most widely used system by small-scale fish farmers in southern Brazil (States of Paraná, Santa Catarina and Rio Grande do Sul). The aim of this study was to compare biotechnical and economic parameters between a farm system (FS) using farm inputs (chicken manure, maize and grass) and a commercial system (CS) using commercial inputs (triple super phosphate, ammonium nitrate and balanced food) feeding to apparent satiation. The experiment was carried out for 196 days in earthen ponds of 500 m 2 , with three replicates per system. The stocking density was 2,000 fish ha-1 , consisting of 35% grass carp (Ctenopharyngodon idella), 30% of mirror common carp (Cyprinus carpio var. specularis), 20% of bighead carp (Aristichthys nobilis) and 15% silver carp (Hypophthalmichthys molitrix). In both systems, a low level of total phosphorus in water (0.06 mg L-1) and in the sediment (4 mg L-1) was observed. Production was significantly increased in the CS (76 kg 500 m-2 196 days-1) than in the FS (43 kg 500 m-2 196 days-1). Costs and revenues were higher in the CS and profits were similar in the two systems. Similar profits do not mean that CS is necessarily more convenient. Advantages and drawbacks for small-scale farmers considering labor, land and availability of money are discussed.

2023, Hydroécologie Appliquée

Recherches sur l'état physiologique des poissons de la retenue de Pareloup : données relatives à cinq années d'étude

2023, Bulletin Français de la Pêche et de la Pisciculture

La réponse au stress induit par le transport a été étudiée chez des truites arc-en-ciel immatures d'un poids moyen de 200 g. D'une manière globale, les valeurs de l'hématocrite, de l'osmolarité du plasma sanguin, du Cortisol et de la testosterone sont significativement plus élevées chez les poissons transportés que chez les témoins non transportés, alors que les niveaux de gonadostimuline (GTH1) et d'hormone de croissance ne diffèrent pas suivant les lots. L'analyse du comportement en « open field » des individus de chaque lot montre que les poissons transportés s'immobilisent en moyenne après un temps significativement plus long que les témoins. L'étude des performances zootechniques de chaque lot pendant les deux mois suivant l'expérience indique que le lot transporté récupère rapidement.

2023

This project was commissioned to assess the impact of a large fish kill in April 2013 on the fish fauna of the Vasse-Wonnerup. Such an assessment was made possible as regular sampling of the fish in the nearshore waters of the system had been occurring since February 2012. In order to elucidate whether any shift in fish community composition had occurred as a result of the fish kill, 'natural' spatial and temporal changes in faunal composition had to be determined. Analysis of the nearshore fish fauna collected every three months over a two year period between February 2012 and November 2013 indicated that the composition of the fish fauna changed markedly both among seasons and regions and that this change was accompanied by large changes in water quality, most notably salinity. Both the number of species and individuals were greatest in the lower reaches of the system, i.e. the Deadwater and Wonnerup Inlet, and declined in an upstream direction through both the lower and upper Vasse and Wonnerup estuaries, before increasing in the Lower Vasse River Wetlands. The diversity in the lower reaches reflects the presence of juveniles of commercially and recreational important fish species, while the high numbers of fish is a reflection of the relatively stable water and salinity levels. These levels changed markedly in the Vasse and Wonnerup estuaries, with the upper estuaries becoming dry and the lower estuaries markedly hypersaline, reaching 132 (around four times full strength seawater) during summer and autumn, before freshwater discharge in winter lowers the salinity considerably (i.e. to < 10). The density of fishes in the Vasse-Wonnerup changed dramatically over the course of a year, with those changes being consistent across the two years. High densities of fish were recorded during November and February, before declining rapidly in May and remaining at those levels in August. This trend is a reflection of i) the breeding cycle of many of the estuarine species, which typically live for one year and spawn over the summer period and ii) the reduction in water levels, increase in salinity and temperature and consequently lower dissolved oxygen concentrations at night. The decline in water levels in The robust baseline data on the entire fish community gathered in the current report will prove extremely valuable in the long-term monitoring of the ecological health of the Vasse-Wonnerup. Moreover, it will allow more informed management decisions to be made, and also better assessment of the efficacy of those decisions. It is recommended that annual monitoring of the fish community occurs in February to detect any changes in the ecological condition of the system. It is also recommended that the biology of Black Bream be investigated further to help guide specific management of that recreationally valuable species to ensure that its stocks remain healthy.

2023

Results of a demonstration project of the In-Pond Raceway System (IPRS) technology in seven tilapia raceways at a commercial farm in Mexico showed the potential for increasing fish production with no water exchange, the opportunity for optimizing feed volume applications, simplified and lower cost for fish harvesting procedures and labor of this environmentally sustainable culture system.

2023

The portable hatchery technology has made significant impact directly through increased availability of seed and indirectly through transfer of a range of aquaculture technology around it. Based on the need assessment one of such hatchery was installed and operated at Puranapradhan Village of Balianta Block, Khordha District, Odisha, India. During breeding season of 2015 the hatchery was used for induce breeding of Indian major carps i.e., rohu (Labeo rohita) and mrigal (Cirrhinus mrigala) 19 times (viz., rohu 11 times, and mrigal 8 times). Total 198 lakh spawn (carp seed) was produced (i.e., rohu 125 lakh and mrigal 73 lakh) from the breeding operations. Spawning fecundity was found to be 1.3-1.82 and 1.25-1.58 lakh egg/kg female body weight of rohu and mrigala, respectively. Percentage of fertilized eggs during spawning was calculated to be 90-100% for both species. Spawn production per kg female body weight was found to be 1.23-1.55 lakh/kg for rohu and 1.09-1.4 lakh/kg for mriga...

2023, IJCRT

However, the wide spread of the species is non availability of seed both hatcheries and natural sources. The possibility to collect Magur seed from natural sources has become low. Because, the gradually increasing of pesticides use in the breeding grounds of catfish. In the natural environment, it spawns once a year and the period is July-August. Now, the way of induced breeding, by creating an artificially natural environment for hatching eggs very easily. The commercially available synthetic hormone WOVA-FH has been found most efficient inducing agent for the breeding of the Clarias batrachus with high success rate. In breeding, male scarification and female stripping are the major procedure. Also, high level survival rate of Magur spawn to fry, with high care. My research shows that the breeding and rearing of Magur (Clarias batrachus) can be achieved at the village level condition using a simple low-cost technology. Since, it is a small-scale unit; a greater number of farmers can adopt the technology for producing the seed as per requirement.

2023, Indian Farming Digest

Integrated fish farming offers tremendous
potential for food security and poverty alleviation in
rural areas. It offers synergies between aquaculture
and agricultural/livestock activities which enhances
nutrient recycling, increasing resource use
efficiency. It is an efficient way of using the same
land resource to produce both carbohydrate as well
as animal protein. It provides diversification of
income generating activities, improve soil fertility,
pest control with less use of chemicals (pesticides,
fertilizers), etc. Integrated farming system is a
sustainable approach to conserve aquatic
biodiversity, increase production by reducing input
cost and provides food and income generation
throughout the year.

2023, Indian Farming Digest

Raft culture of edible aquatic plans having
medicinal value can be culture in urban as well as
rural areas. High value air breathing catfishes like
singhi, magur etc suggested for monoculture with
high stocking densities. The negative impact of high
stocking density culture is the maintenance of good
water quality parameters. The simple intervention of
raft technology, will be giving a solution for
monitoring the water parameters in optimum
conditions. The raft also produces additional crop by
recycling the waste, the leached nutrients of
intensive aquaculture.

2023, Latin American Journal of Aquatic Research

2023

The growth performance of red tilapia hybrid was studied in experimental net cages 1m X 1m X 1.5m in freshwater pond in College of Fisheries Laboratory Research Station, Bawing, General Santos City. Fingerlings were purchased from Brgy. Ising, Carmen, Panabo, Davao Del Norte on March 24, 2018. Two experimental stocking densities were employed, 150 fingerlings in treatment I and 200 fingerlings in treatment II. Tilapia were hand‐fed pelleted commercial tilapia feed thrice daily throughout the 60‐day experiment period. Fish were grown at ambient temperature of 29-32°C and natural photoperiod.
Results were an eighteen-fold and thirteen-fold biomass density increase in both trials from an initial 285 grams to 5, 304 grams in m−3 (150 SD) and 380 grams to 5,210 grams in m−3 (200 SD). Weight gain of treatment I obtained 22.72 grams and treatment II obtained 22.25 grams within 60 days of culture. Mean specific growth rate (SGR) was determined as 4.37 grams day−1 in 150 SD and 4.34 grams in 200 SD. Mean feed conversion ratio (FCR) was calculated to be 3.49 grams and 2.68 grams, respectively.
Survival was 100% in both treatments. The results demonstrated that red tilapia fingerlings can be raised in cages and that growth performance (ABW, WG, SGR and FCR) and survival of tilapia were not significantly different at the two stocking densities tested.

2023

Anabas testudineus (Climbing perch) growth and production were estimated using locally constructed cages (1 m 3) at various stocking densities (40, 60, 80 and 100 fish m-3) in a forest water body, located in Tripura, NE India. Each rearing density was repeated three times. The size of the fish at release was 3.5 ± 0.3 cm/2.8 ± 0.35 g and they fed with pellet feed @ 2% (28% CP) of fish biomass. After 180 days of farming, we observed that an increase in stocking density decreased fish length, body weight, specific growth rate (SGR) and survival rate, as well as reduced feed conversion efficiency of fish. Maximum fish growth was recorded at a stocking density of 40 fish m-3 (84.5 ± 0.67 g fish-1) and minimum at density of 100 fish m-3 (53.4 ± 3.07 g fish-1). There was no significant difference in weight gain and SGR between 40 and 60 fish m-3 (p ≤ 0.05). The SGR ranged from 1.63 to 1.88%/ day and the FCR ranged from 2.3 to 2.8. Survival was highest at 40 fish m-3 (87.6%) and lowest at 100 fish m-3 (58.6%). Fish biomass production ranged from 2.96 ± 0.05 kg (40 fish m-3) to 4.0 ± 0.29 kg cage-1 (60 fish m-3). Based on this study, it can be concluded that a stocking density of 60 fish m-3 is optimal for cage farming of A. testudineus to ensure better growth and survival of the fish and forest water bodies can be explored for cage culture.

2023, Journal Of Agrobiotechnology

Fish meal (FM) is a well known protein source for fish feed and its heavy utilization has contributed to overfishing that lead to increase price of formulated feed due to scarcity of fish resources for fish meal. Several studies were done to identify the best substitution of FM including Black Soldier Fly (Hermetia illucens) larvae as a potential candidate for FM replacement. This study was done to investigate the proximate composition of Black Soldier Fly Larvae Meal (BSFLM) and to determine its efficacy as feed on growth performance of Javan Mahseer (Tor tambra). Three types of treatment were used namely F0 or control (0% BSFLM and 100% FM), F50 (50% BSFLM and 50% FM) and F100 (100% BSFLM and 0% FM). Each treatment was fed twice daily for 20 days to 10 Javan Mahseer with the average initial weight of 0.1g respectively. Analyses conducted was proximate composition and growth performance like specific growth rate, feed conversion ratio, survival rate and body weight gain. Data was a...

2023, Journal of entomology and zoology studies

The present study will be of great use to extension workers, planners, administrators and research workers, as it would throw some light on rural youth entrepreneurship qualities of pisciculture farmers. The objective of the study was to assess the extent of adoption of pisciculture technology as a means of rural youth livelihood in coastal Odisha. Both purposive and multistage random sampling methods were adopted for the selection of the district, grampanchayat, village and respondents. A total of 180 numbers of respondents were selected for the purpose of the investigation. Based on the descriptive statistics, most of the respondents had medium extent of adoption on pond requirement in pisciculture. The youth entrepreneurs in pisciculture had high extent of adoption on pre-stocking management, pond management and harvesting and post-harvesting management of the pisciculture. On the other hand, the study also revealed that education level, annual income, house type, pond size, extension contact, information source use, risk orientation, scientific orientation and innovation proneness were significantly and positively correlated with the adoption of various pisciculture technologies. It is therefore concluded that these aspects may be taken care of by the policy makers, scientist, extension agencies working in the area, so that the youth entrepreneurs in pisciculture will adopt recommended practices and harvest desirable quantity of fish not only to increase their standard of living but also make the area as well as the state self-sufficient in fish production, to fulfil at least internal requirements.

2023