Aquarium Fish Research Papers - Academia.edu (original) (raw)

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- International Marketing, Aquatic Plants, ORNAMENTAL FISH AQUACULTURE, Aquarium Fish
- by Svein Fosså
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- Fisheries, Fisheries Management, ORNAMENTAL FISH AQUACULTURE, Aquarium Fish
- by Mini Sekharan
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- Conservation, Biology, Biological invasions, Multidisciplinary

this article is about all Ultimate Guide to Marimo Moss Balls. In this article talks all about keeping, cultivating, carrying and tips of marimo moss balls in the freshwater tank. Please visit our site aquascaper.org for more information... more

- by Angela D. Calvillo
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- Business, Botany, Aquatic Ecology, Conservation Biology

Aquarium business service in India recorded a value of US$ 1.3 million in the export trade in the year 2006 according to food and agriculture organization. Internationally, Singapore ranks first with US$ 49.5 million, and Zech Republic, Japan and Malaysia stood almost equally 7% in aquarium fish trade. Robert fanner (2001) reported that the concept of running a service company in contrast with a retail business is not new to many industries. The service sectors provide employment for more economic growth. In this direction, in order to develop market for aquarium business service, there is a need or studying consumer preference and existing marketing strategies, adopted by aquarists. The objectives of the study are to identify consumer preference for ornamental fish and profile of costumers, the existing marketing strategies adopted by ornamental fish aquarium business service providers. Selvarasu A. and Sankaran A. (2010) have developed a marketing scale to measure consumer preference for aquarium hobby. In addition, an interview schedule have been planned to review the existing marketing strategies as on year 2010. Aquarium business service marketing scale comprises of seven dimensions, initially. As a result of the pilot study, based on the results of reliability test, five dimensions have been retained for the final study.

- by Prof A. Selvarasu and +1
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- Service Design, Services Marketing and Management, Aquarium Fish, Aquarium Science

Global audiences are increasingly being exposed to digital media with fictitious storylines that draw on animal characters involuntarily entering wildlife trades. An understudied problem in wildlife trade is the potential for motion pictures to influence their audience’s desire to become more acquainted, often via acquisition, with animals portrayed in the films. The 2003 Disney motion picture Finding Nemo connected audiences with a wildlife trade already commonplace: the marine aquarium trade. In this trade, fisheries supply live coral reef organisms to millions of public and private aquaria worldwide. Here, we examine the perception and reality of Finding Nemo’s impact (coined the “Nemo Effect”) on the fisheries of the species complex representing the film’s primary protagonist “Nemo” (Amphiprion ocellaris/percula). Import and export figures show little evidence for fan-based purchases of wild-caught fish immediately
(within 1.5 years of release) following the film. We argue that the perceived impact on these species, driven by popular media with an emotive but scientifically uninformed approach to conserving coral reef ecosystems, can be more damaging to the cause of conservation than helpful. This perspective is intended to encourage marine aquarium trade stakeholders to consider the ecological and social repercussions of both media driven consumption and opposition to the trade. Using lessons learned from Finding Nemo, we discuss the likely impacts the sequel, Finding Dory, will have on wild populations of its protagonist “Dory” (Paracanthurus hepatus).

- by Simon Foale and +1
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- Coral Reefs, Fisheries Management, Fair Trade, Environmentalism

Aquatic Plants is a plant that can live in water such as seaweeds, ferns and many other types with special functions in natural habitats. However, now, these aquatic plants have been commercialized for use in decorating fish aquariums to further enhance the attractiveness of the aquarium. In the meantime, aquatic plants are commercialized and sold in the hobby industry to keep ornamental fish in the aquarium actually have some functions. For beginners, aquatic plants are to beautify the aquarium. But for hardcore enthusiasts who prioritize the natural process, planting aquatic plants is more to seek satisfaction. By planting aquatic plants in the aquarium, we can learned that aquatic plants are important to supply oxygen in the aquarium naturally and can absorb carbon dioxide gas released by fish, thus completing natural carbon cycle. Aquatic plants in aquariums can also be a source of natural food for some species of fish that eat leaves or grass and will be a place of fish protection from predators, shelters of laying fish and also as a place of play.

- by Ir. MD Nursyazwi Mohammad
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- Business, Botany, Organic Chemistry, Aquatic Ecology

The supply chain of exotic ornamental fish for domestic marketing includes breeders at the first step followed by wholesalers, retailers and consumer/hobbyist where as the chain for export marketing includes breeders, suppliers, exporters and consumers/hobbyist abroad. The trend towards traceability, certification and improved farm management is driving responsibilities down the market chain to the breeders/breeding sector. Tomey (1997) pointed out that, with regards to recent developments in European legislation, tracking i.e. following a shipment from point of export to import and tracing i.e. the ability to follow the consignment all the way back to its original source, for example, a particular breeder or farm for health and welfare for all items are becoming a basic issue. Ornamental fish breeding/production has evolved from a pursuit into a sustainable livelihood alternative, comparable to agriculture or other activities of fisheries in India. Of late, this sector has been accorded wide recognition as a potent instrument for providing employment opportunities, slowing urban migrations, alleviating poverty, contributing to national income growth, and promoting equitable distribution of income and enhancing foreign exchange. In spite of the fact that India has conducive conditions for ornamental fish breeding, the production from the breeding sector is to the level of 100 Million fish per year. The ornamental fish export was to the tune of 535 Lakh (US $1.27 million) in 2008 (MPEDA, 2008). The demand for exotic fishes is high in the international ornamental fish markets such as USA, Europe, and UK. It is noted that in the domestic market for ornamental fishes, the supply from the breeding sector does not meet the domestic demand, which points at the fact that there remains no surplus stock for export. The domestic market for ornamental fishes in India is basically a sellers market and anything bred is devoured by the market without even considering the quality of it. For an industry to improve, the production level has to increase and the quality of the product also has to be enhanced.

- by Mini Sekharan
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- Marketing, Fisheries, Fisheries Management, Aquaculture

Global audiences are increasingly being exposed to digital media with fictitious storylines that draw on animal characters involuntarily entering wildlife trades. An understudied problem in wildlife trade is the potential for motion pictures to influence their audience's desire to become more acquainted, often via acquisition, with animals portrayed in the films. The 2003 Disney motion picture Finding Nemo connected audiences with a wildlife trade already commonplace: the marine aquarium trade. In this trade, fisheries supply live coral reef organisms to millions of public and private aquaria worldwide. Here, we examine the perception and reality of Finding Nemo's impact (coined the “Nemo Effect”) on the fisheries of the species complex representing the film's primary protagonist “Nemo” (Amphiprion ocellaris/percula). Import and export figures show little evidence for fan-based purchases of wild-caught fish immediately (within 1.5 years of release) following the film. We argue that the perceived impact on these species, driven by popular media with an emotive but scientifically uninformed approach to conserving coral reef ecosystems, can be more damaging to the cause of conservation than helpful. This perspective is intended to encourage marine aquarium trade stakeholders to consider the ecological and social repercussions of both media driven consumption and opposition to the trade. Using lessons learned from Finding Nemo, we discuss the likely impacts the sequel, Finding Dory, will have on wild populations of its protagonist “Dory” (Paracanthurus hepatus).

- by Simon Foale
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- Biology, Coral Reefs, Ecology, Fisheries Management

Reports on the results of research based on the test-marketing of giant clams as aquarium specimens in Brisbane, Australia, in the third-quarter of 1991. Giant clams were distributed through six cooperating retail aquarium outlets and sold at a reasonable commercial price. This was considered to be $10 – 13 for T. crocea of 2.5 - 5cm (1 – 2") in size. Clams were supplied free of charge to cooperating retailers. In return they were required to complete survey forms and to try and ensure that purchasers of their clams did likewise, and to take care of the clams in their possession.
The results indicate that giant clams are rated as very good aquarium specimens and in that respect were considered to be about as equally desirable as coral and anemones. The most desired size of clams was considered to be in the range 5 – 10cm (2 – 4") and purchasers on average thought that a price of around $19 would be reasonable for such clams, even though retailers suggested a slightly lower price.
The margin of mark-up available to retailers in Queensland for sales of giant clam aquarium specimens in the size range 2.5 – 5cm seems quite low, particularly given the cost of the permit required from the Queensland Department of Primary Industries. The permit and regulations enforced by the Queensland Department of Primary Industries are a major impediment to the development of the aquarium market in Queensland for giant clams. Apart from the expense involved for the retailer, purchasers are also required to hold permits from this Department. This places a major dampener on sales in Queensland given that permits must be obtained in advance by potential purchasers. Although commercial farming of clams exists in Queensland, farmers find it easier to export their products rather than to attempt to sell them in Queensland.
This report also provides information about a number of other issues affecting the market for giant clams as aquarium specimens e.g. availability of information on keeping them in home aquariums, characteristics of purchasers and so on. The results also indicate that the Australian market for giant clams as aquarium specimens is about 5,000 per year. This is a similar estimate to that made in 1989 on the basis of a different survey.

- by Clement Tisdell
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- Australia, Mariculture, Aquarium Fish, Reef Aquarium Hobby

The sale of crayfish in the pet trade has increased in recent decades, and a substantial fraction of the world's entire range of crayfish species is available in the pet trade. The market for pet crayfish creates two major concerns: the potential for over exploitation of natural populations of crayfish to supply the pet trade, and the negative consequences resulting from the release of non-indigenous crayfish into natural habitats. The chain from the source of crayfish to the final owner can be lengthy, and each step in the supply chain needs to be studied by different methods. While there are often regulations intended to limit the trade of crayfish as pets, they differ widely from place to place and seem to have limited success in changing the behaviour of owners of pet crayfish.

- by Zen Faulkes
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- Crustacea, Invasive Species, Biological invasions, Crustacea Decapoda

Jual Aquarium Mini Murah USB Dekstop Jual Aquarium Mini Harga Murah Warna Hitam dan Putih Jual Aquarium Mini Harga Paling Murah | Trusted Seller: 085 641 243 336 masbidin.net /jual-aquarium-mini-harga-murah/ Jual Aquarium Mini Harga Murah – Semakin populernya ikan hias air tawar saat ini membuat para pengrajin aquarium mengembangkan ide-ide kreatifnya dengan mengahasilkan berbagai jenis dan model aquarium yang unik. Diantaranya aquarium nisso, aquarium besar, aquarium kecil, aquarium akrilik dan aquarium bulat. Jual USB Desktop Aquarium Mini Fish Tank with Running Water Berikut ini kami menyediakan aquarium dengan ukuran yang hanya sangat cocok untuk menghilangkan rasa suntuk dan bosan kamu saat belajar atau bekerja di ruangan. Selain itu dengan adanya aquarium dapat memberikan inspirasi ketika sedang mentok. Karena adanya ikan-ikan yang selalu bergerak dalam aquarium ini dapat menangkan fikiran sehingga ide-ide kreatif maupun gagasan yang inovatif akan muncul.

- by masbidin dotnet
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- Business, Fishing, Budidaya, Aquarium Fish

Moss plant is an interesting plant because they can live in emerged and submerged. Vesicularia Reticulata is one of an interesting moss plant. It also called Erect Moss. Many Aquascaping Hobbies planted it in his tank. It will grow maximal in high light, but it can live in low lighting too. Please visit http://aquascaper.org for more information about aquarium plant

- by Angela D. Calvillo
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- Botany, Plant Biology, Biology, Fish Biology
- by Mini Sekharan and +1
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- Fisheries, Fisheries Management, India, Ornamental Fish

Many reef coral diseases have been described affecting corals in the wild, several of which have been associated with causal agents based on experimental inoculation and testing of Koch's postulates. In the aquarium industry, many coral diseases and pathologies are known from the grey literature but as yet these have not been systematically described and the relationship to known diseases in the wild is difficult to determine. There is therefore scope to aid the maintenance and husbandry of corals in aquaria by informing the field of the scientifically described wild diseases, if these can be reliably related. Conversely, since the main driver to identifying coral diseases in aquaria is to select an effective treatment, the lessons learnt by aquarists on which treatments work with particular syndromes provides invaluable evidence for determining the causal agents. Such treatments are not commonly sought by scientists working in the natural environment due the cost and potential environmental impacts of the treatments. Here we review both wild and aquarium diseases and attempt to relate the two. Many important aquarium diseases could not be reconciled to those in the wild. In one case, however, namely that of the ciliate Helicostoma sp. as a causal agent of brown jelly syndrome in aquarium corals, there may be similarities with pathogenic agents of the wild coral diseases, such as white syndrome and brown band syndrome. We propose that Helicostoma is actually a misnomer, but improved understanding of this pathogen and others could benefit both fields. Improved practices in aquarium maintenance and husbandry would also benefit natural environments by reducing the scale of wild harvest and improving the potential for coral culture, both for the aquarium industry and for rehabilitation programmes.

- by Michael J Sweet and +1
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- Microbiology, Aquaria, Aquarium Fish, Coral

An alphabetic list with the scientific names of all known recent freshwater fish species is presented. Also listed are the Dutch (common) names in use for freshwater fishes and the English (common) names of the more popular freshwater aquarium fishes. The aim of this publication is six-fold: • to list the currently valid and correctly written scientific name of every recent freshwater fish species; • to stimulate the use of correctly written scientific names; • to list Dutch and some frequently used English vernacular names of freshwater aquarium fishes and freshwater aquacultural fishes; • to list some scientific names wrongly used by aquarists; • to present some aquarium book citations; • to present an overview of the freshwater and brackish water fishes recorded during the last century in various aquarium books. Although many scientific names are likely to change with scientific progress, we nevertheless present the list of currently valid scientific names now. This current list ...

One of the major underlying causes for increased biological invasion is the growth and development of world markets1 facilitated through globalization, and the booming intercontinental trade of live flora and fauna. The vast majority of recent invasions has been attributed to human activities associated with this international trade, which is accelerating the spread of organisms into new regions2, 3. Global trade in flora and fauna has led to both repeated introductions of popular exotic species in many systems and has aided in ...

- by Mini Sekharan
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- Conservation, Biological invasions, Multidisciplinary, Current Science
- by Paolo Melandri
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- Friedrich Nietzsche, Johann Wolfgang von Goethe, Wagner Studies, Karl Marx

7 Diese Vielgestaltigkeit und ökologische Flexibilität führt zu der Frage, ob die als "Guppy" bezeichneten Fische eigentlich alle einer einzigen Art angehören. Durch Neuentdeckungen in der Natur und durch Untersuchungen ihres Erbmaterials wird diese Frage in letzter Zeit in Aquarianerund Wissenschaßlerkreisen lebhaft diskutiert. Bevor hier der Zwischenstand dieser Diskussion vorstellt wird, erfolgt zunächst ein kurzer Abriss der Forschungsgeschichte. Er wird zeigen, dass es von Beginn an Probleme gab mit der Frage, wie viele Guppyarten es eigentlich gibt. Wilhelm PEURS ausschließlich auf der Betrachtung eines weiblichen Tieres beruhte. PETERS ging irrtümlich davon aus, dass bei dieser neuen Fischart beide Geschlechter identisch, nämlich einfarbig grünlich, gefärbt sind. Es kann nicht überraschen, dass 1861 die ersten männlichen H Poet//fa wange/(Carupano-Guppy) ef Poecf/ia Hinge/(Campoma-Guppy)

- by Ulrich Schmölcke and +1
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- Aquarium Fish, Aquarium

The Indian Glass fish, Pseudambassis ranga (P. ranga) (Hamilton, 1822) is popular Indian aquarium fish both locally and globally. The length-weight relationship and condition factor of P. ranga were carried out from East Kolkata Wetland during June 2013 to May 2014. This paper spots the light on the growth coefficient (b) and condition factor. Length-weight relationship and condition factor for a sample size of 595 specimens were calculated. The 'b' value was 2.70, 2.63 and 2.67 in case of male, female and combined sex respectively. Length-weight relationship of P. ranga indicates negative allometric growth and found to be significantly different at 1% level. The scatter diagram showed the linear relationship between the Log length and Log weight of the fish in all cases. The fish does not follow the cube law strictly. The functional form of Length-weight relationship of the species is fitted as Log W= -4.39+ 2.67Log L for combined sex, Log W= -4.43+ 2.70Log L for male and Log W= -4.33+ 2.63Log L for female. The value of the condition factor (K) of the fish is 0.0014 which indicates the poor condition of the fish. The study on the sex ratio showed 1 male: 1.26 female.

- by SHREYA BHATTACHARYA
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- Conservation Biology, Fisheries, Ecology, Fish Biology

We present one year of buying and selling data of the yellow coral goby (Gobiodon okinawae) in Banggai Laut District, Banggai Archipelago, Central Sulawesi, Indonesia. This data is the first to demonstrate that this species is being captured and exported from the region to be sold in the global saltwater aquarium trade. We present frequency, volume, mortality, as well as profit margin for collecting and selling this species. We also describe first-hand observation of how these fish are typically caught in the region. Additionally, we argue that harvesting the yellow coral goby presents a potentially sustainable alternative or additional source of income for fishers, especially compared to targeting another popular aquarium species in the region, the royal blue tang (Paracanthurus hepatus). For the former species, fishers use a large scoop net known as a "serok", while for the latter, fishers often use illegal chemical anesthetics. While more still needs to be understood about the trade in yellow coral goby in Banggai Laut District, this data provides initial insight into the trade and its livelihood and sustainability potential.

- by Abigail Moore
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- Fisheries, Environmental Sustainability, Small scale fisheries, Ornamental Fish
- by ajith kumar
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- Fisheries, Fisheries Management, ORNAMENTAL FISH AQUACULTURE, Aquarium Fish
- by Paolo Melandri
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- Hippocampus, Ricordi, Aquaria, Medicina
- by Mini Sekharan
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- Fisheries, Fisheries Management, Aquaculture, SMES IN DEVELOPING COUNTRIES
- by Mohamed Shariff
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- Aquaculture, Aquarium Fish

The blue and yellow damselfish Chromis limbaughi is a species protected by the Mexican federal government due to its commercial relevance as an aquarium fish. In this paper we present new records of the species at 17 locations north of its accepted northernmost distribution limit. Because of the abundance, relative occurrence, and the presence of adults and juveniles in the new sites, these might represent reproductive populations. It is probable that the species has settled successfully there in recent years by taking advantage of the warming of the region reported in the last decade.

- by Francisco Fernandez Rivera Melo
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- Ecology, Abundance, Aquarium Fish, Baja California Peninsula

- by Hector Reyes
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- Coral Reef Ecosystems, Coral Reefs, Ecology, Abundance

- by John Bythell
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- Microbiology, Zoology, Plant Biology, Ecology

- by J. Bythell
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- Microbiology, Zoology, Plant Biology, Ecology

Introductions of non-native crayfish around the world are increasingly tied to the distribution, sale, and eventual release of pet crayfish. As part of risk assessment for the introduction of non-native crayfish in North America, I monitored the sale of crayfish on an auction website that specializes in aquatic pets and aquarium supplies for a year. Three species accounted for the majority of sales: the parthenogenetic crayfish, Marmorkrebs (Procambarus fallax f. virginalis), the Cajun dwarf crayfish (Cambarellus shufeldtii), and the orange morph of the endangered Mexican
dwarf crayfish (Cambarellus patzcuarensis). Almost half of individual crayfish sold (48.5%) were Marmorkrebs, which is more than twice as many as C. shufeldtii, the second most commonly sold species. The Louisiana red swamp crayfish (Procambarus clarkii) was often offered for auction, but was bought much less often than the other three species. About 11% of P. clarkii auctions were successful, while more than 45% of auctions were successful for the other three. Four Cherax species were the only crayfish sold online whose native range was outside North America. Neither Marmorkrebs nor the orange morph of C. patzcuarensis can be collected regularly from natural habitats in North America, suggesting that most crayfish sold online in North America are obtained from existing stocks in the pet trade, rather than being collected from natural habitats.

- by Zen Faulkes
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- Risk and Vulnerability, Invasive Species, Biological invasions, Crustacea Decapoda

Tiger oscar (Astronotus ocellatus) is a favorite for aquarium fish enthusiasts due to its beauty and compatibility. The study was conducted to evaluate the effects of Lactococcus lactis and Bacillus subtilis on growth efficacy and hepatic enzymes of oscar by selecting 300 juveniles with a mean weight of 8.96±0.03g and length of 8.23±0.02cm. During 70 days fishes fed by diets contained L. lactis and B. subtilis in 9 single and combined treatments groups with the number 1010CFU/g bacteria in treatments which included 150, 300, and 450mg/kg of L. lactis (LL150, LL300, and LL450), 150, 300, and 450 mg/kg of B. subtilis (BS150, BS300, and BS450), 150, 300, and 450 mg/kg of an equal mixture of L. lactis and B. subtilis (MIX150, MIX300, and MIX450) and control group. Finally, their growth indices and hepatic enzymes were assessed. Results showed that applying both bacteria in the feeding of oscar fish has significantly improved the growth indices. Also, adding bacteria in the diet led to increased weight gain (WG), body weight index (BWI), average daily growth (ADG), Specific growth rate (SGR), final biomass and protein efficiency ratio (PER) compared to control (p < 0.05). All single and combined treatments compared to control had the most reduction of FCR which was statistically significant (p < 0.05). Also, the highest statistically significant difference between hepatic enzymes, alanine aminotransferase and aspartate aminotransferase was measured with control in treatment 3 (LL450) and alkaline phosphatase in treatment 9 (MIX450) (p < 0.05). The addition of these bacteria individually or in combination had a positive effect on growth indices and liver enzymes.

- by Habib Vahabzadeh Roudsari and +1
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- Probiotics, Aquaculture nutrition, Aquarium Fish

An investigation was carried out to evaluate the efficacy of different organic substrate on morphological traits of the freshwater ornamental aquatic plant, waterwort Elatine gratioloides in the mud pots of 3.5 L capacity at College of Fisheries, GADVASU, Ludhiana, Punjab for 5 months duration. An experiment was planned in completely randomized design with five treatments viz., control-without manure (T 0), Vermi compost (T 1), poultry manure (T 2), cattle manure (T 3) and goat manure (T 4) in triplicate to study the effect of organic substrate on growth and development of E. gratioloides. The study revealed that, increase in plant biomass, total plant length and number of leaf and runners was observed in treatments containing high nitrogen content. Comparatively, poultry manure (T 2) illustrated superior results and showed significant difference among the treatments, except for the cattle manure (T 3). Since cattle manure is easily available in local market Original Research Article

- by Sachin O. Khairnar
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- Fisheries, Aquaculture, Fish Nutrition, Aquarium Fish

Teknik Informatika, STMIK Sumedang 1.Latar Belakang Saat ini dunia informasi berkembang dengan pesat yang ditandai dengan adanya pemanfaatan internet yang semakin mendunia. Internet sebagai penyampai informasi keberadaannya kini sudah menjadi kebutuhan. Manfaat internet cukup besar dirasakan terutama dalam dunia bisnis, hiburan dan pendidikan. Tujuan dari penelitian ini adalah memudahkan untuk memilih jenis ikan dan kegunaannya, agar cocok dengan yang di inginkan oleh pembuat aquascape dan cocok bagi ekosistemnya, agar memperindah dan menonjolkan keindahan alam agar pengguna tidak salah memilih ikan untuk aquascape. Metode Penelitian ini yaitu mengumpulkan data, analisis, dan implementasi, Dengan di buatnya website jenis ikan dan kegunaanya mempermudah seorang pembuat aquascape dalam memilih ikan dan mencari kegunaan ikan tersebut dalam ekosistem aquascape, sehingga pembeli tidak salah dalam memilih ikan yang akan di belinnya. 2.Hasil dan Pembahasan Pada perancangan website ini dari hasil observasi yang di peroleh dari penjual sekitar, maka selanjutnya dibuatkan halaman website, dan strukturnya a. Penerapan script dan mockup 1.Track : Jenis ikan aquascape dan kegunannya 2. Role : Admin , Pengguna 3. Prop : pc/laptop, Handphone 4. Scane :

- by Muhammad Anggi Rizki Ramadhan
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- Tugas kuliah, Aquarium Fish, Tugas, Evaluasi Pembelajaran

... specific water quality parameters that are very different for each species, pH, temperature, water hardness, salinity and many other trace elements. ... It is found that among college ate educational level of aquarium users, 44... more

- by sankar Sankar
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- Service Design, Services Marketing and Management, Aquarium Fish, Aquarium Science

An investigation was carried out to evaluate the efficacy of different organic substrate on
morphological traits of the freshwater ornamental aquatic plant, waterwort Elatine gratioloides in the mud pots of 3.5 L capacity at College of Fisheries, GADVASU, Ludhiana, Punjab for 5 months duration. An experiment was planned in completely randomized design with five treatments viz., control- without manure (T0), Vermi compost (T1), poultry manure (T2), cattle manure (T3) and goat manure (T4) in triplicate to study the effect of organic substrate on growth and development of E. gratioloides. The study revealed that, increase in plant biomass, total plant length and number of leaf and runners was observed in treatments containing high nitrogen content. Comparatively, poultry manure (T2) illustrated superior results and showed significant difference among the treatments, except for the cattle manure (T3). Since cattle manure is easily available in local market

- by Abhed Pandey
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- Fisheries, Aquaculture, Fish Nutrition, Aquarium Fish

Ornamental fisheries are economically viable activities in developing countries due to the fact that aquaria have become a worldwide hobby. In Mexico, the fishery has been conducted since the 1980s, especially in the Baja California Peninsula, but nevertheless, there are no adequate records of commercial production, or about the economic gain due to the exploitation of the resource. The objective of this paper was to calculate the maximum allowable catch for the five ornamental fishes included in the NOM-059-SEMARNAT (protected by federal mandate), and the net monetary gain that the resource might generate. Censuses (N=1 610) were conducted in 21 reef sites of the Mexican Pacific and Gulf of California in order to estimate population density of each taxon; also, natural mortality rate (M) was calculated from maximum size (L∞), individual growth rate (k) and temperature (C), and the total allowable catch was estimated on the basis of M. Finally, considering the prices of the species paid to fishermen at the beach, an estimation of the economic value of a single fishing season for an area of 220 hectares (representative of the catch area assigned in average to a cooperative in Mexico) was produced. The results indicated that the areas with the best economic potential were Encantadas Islands, Los Angeles Bay, and San Lorenzo Archipelago (all in the state of Baja California). Outside of the gulf (where no legal ornamental fisheries exist) the potentially more rentable locations were Marietas Islands (Jalisco), and the Revillagigedo Islands. Aquarium fisheries may be a viable activity in several of the analyzed areas of the country, however, the potential gain that harvest represents is not enough to fully sustain an organized group that would perform it; for that reason the ornamental fishery should be seen as an alternative commercial activity. Finally, to guarantee this activity to be a rentable and sustainable fishery, we recommended that, the existing rules defined by the Mexican federal government should be applied to control the catch quotas.

- by Ramachandran Alappat and +1
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- Fisheries, Fisheries Management, ORNAMENTAL FISH AQUACULTURE, Aquarium Fish

The Amazon basin has a freshwater fish diversity comparable to a tropical sea. Although many Amazonian fish species are popular ornamental fish across the world, the ecology of most species in their natural habitat remains poorly known (van der Sleen and Albert 2017). We report on shoaling behavior in Platydoras hancockii in a floodplain forest of the middle Rio Negro, Brazil. As the shoal consisted of only adult males, whereas gravid females were caught individually in nearby areas, we hypothesize that this aggregation may relate to spawning. Moreover, considering that Platydoras hancockii is capable of producing sounds, it is possible that these aggregations entail the formation of a chorus-like call with the function of attracting females from a larger area.

- by Jansen Zuanon
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- Zoology, Geography, Ecology, Ornamental Fish

Touch pools are popular open-topped fish tanks often found in aquariums where visitors may interact with animals, by touching and sometimes even feeding them, for educational and recreational purposes. However, although animal interactions are becoming increasingly popular in recent years, the welfare impact on the animals and the educational effectiveness of such interactions is under debate. Awareness concerning the different, and sometimes controversial, aspects connected with such interactions has spread. The aim of this paper is to investigate the ethical issues arising from the presence of touch pools in aquariums and facilities alike. In particular, possible sources of moral conflicts between five interested parties will be identified and discussed: biodiversity; aquariums; staff involved with touch pools; individual animals used in the touch pools; visitors interacting with animals in touch pools. In order to assess the framework of ethical demands from different parties, it will be used an analytical tool provided by a revised version of the Ethical Matrix.

- by Pierfrancesco Biasetti
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- Animal Ethics, Animal Welfare, Fish welfare, Conservation Education
- by hoca nghethuat
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- Aquarium Fish
- by Benno Pereira
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- Conservation, Biological invasions, Multidisciplinary, Current Science