Uriel Rodriguez-Estrada - Academia.edu (original) (raw)

Papers by Uriel Rodriguez-Estrada

Acta Ichthyologica et Piscatoria

The presently reported study was aimed to determine the effects of graded levels of dietary pink ... more The presently reported study was aimed to determine the effects of graded levels of dietary pink oyster mushroom (Pleurotus djamor) meal (POMM), in growth, feed efficiency, protein utilization, digestive enzymes activities, and whole-body proximate composition of Nile tilapia, Oreochromis niloticus (Linnaeus, 1758), fingerlings (0.3 ± 0.01 g). The experimental design included a control diet (POMM0) formulated with soybean meal, as the main protein source, and four diets designed with increasing levels of POMM: 25% (POMM25); 50% (POMM50); 75% (POMM75); and 100% (POMM100). Experimental diets were administered to 420 fish, randomly distributed in 15, 100-L tanks. The feeding experiment lasted 45 days. Diets and the final whole body were submitted to a proximate composition analysis. Growth, feed efficiency, protein utilization, and digestive enzyme activities were assessed. Compared to POMM0 and POMM25, weight gain (WG), and specific growth rate (SGR), significantly (P < 0.05) decre...

Hidrobiologica, 2010

The systematics of the marine catfish of the family Ariidae is controversial because at the prese... more The systematics of the marine catfish of the family Ariidae is controversial because at the present time the number of species and genera in the family, or their relationships, remain uncertain. Phylogenetic relationships among five representative species of marine catfish of the family Ariidae from both the Pacific and the Atlantic coasts of Mexico were assessed by the analysis of the variability in 21 alloenzymatic loci, and by the comparison of the electrophoretic patterns of whole muscle proteins. Interspecific genetic divergence levels obtained by both electrophoretic methods showed a clear separation among the genera Cathorops, Bagre and Ariopsis, as well as in the studied species of Cathorops and Ariopsis, with Bagre marinus showing a greater genetic similarity with the Ariopsis group. Finally, our results contribute to the definition of the presence of this species in the coasts of the Gulf of Mexico

Suisanzoshoku (Japan), Dec 20, 2009

This study investigated the single and combined effects of pre-and probiotics supplement on the g... more This study investigated the single and combined effects of pre-and probiotics supplement on the growth performance and immune response of rainbow trout. Seven diets supplemented with 1% Enterococcus faecalis (E), 0.4% mannan oligosaccharides (M) and 1% polyhydroxybutyrate (P) in single (E, M and P diets), double (EM and EP diets) or triple combinations (EMP diet) were fed to juvenile rainbow trout (13.2 0.25 g) for 12 weeks. During the feeding test, the fish were healthy and no mortality occurred. Although weight gain and specific growth rate (SGR) were significantly higher (P 0.05) in the fish fed single supplementation of mannan oligosaccharides, its combined supplementation together with E. faecalis showed further improvement of growth as well as feed gain ratio (FGR). On the other hand, single administration of E. faecalis could not improve any growth performance parameter. In addition, E. faecalis improved the immunological parameters such as hematocrit value, phagocytic index and activity and mucus production when administrated alone or combined with mannan oligosaccharides. After fourteen days challenge test the lowest cumulative mortalities were recorded in the fish fed E, M, EM and EMP diets. A single supplementation with E and M and combination of them improved the growth performance and immune response of rainbow trout.

水産増殖 = The aquiculture, Dec 20, 2009

Reviews in fisheries science & aquaculture, Oct 30, 2015

The good-quality white flesh of cobia (Rachycentron canadum) and high value in some markets make ... more The good-quality white flesh of cobia (Rachycentron canadum) and high value in some markets make it one of the most important marine fish species for future aquaculture production. Commercial cobia farming from hatchery-produced seed stock began in the late 1990s and some aspects of broodstock management, larviculture, nutrition and health, among others, still need research and improvements. The present compilation covers the period between 1967 and 2015 and includes publications on cobia general biology, fisheries and aquaculture for the potential benefit of students, researchers, farmers, and the industry.

CABI Compendium, Jan 7, 2022

This datasheet on Rachycentron canadum covers Identity, Overview, Associated Diseases, Pests or P... more This datasheet on Rachycentron canadum covers Identity, Overview, Associated Diseases, Pests or Pathogens, Distribution, Dispersal, Biology &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp; Ecology, Environmental Requirements, Natural Enemies, Impacts, Uses, Management, Genetics and Breeding, Economics, Further Information.

Expansion of aquaculture industry is evidently accompanied by an urgent necessity of aquaculture ... more Expansion of aquaculture industry is evidently accompanied by an urgent necessity of aquaculture feed production. Traditionally, fish meal (FM) and soybean meal (SBM) have been the primary protein source ingredient in aquaculture diets. However, over exploitation of these commodities has conducted to their unsustainability. Hence, research of unconventional protein alternatives has emerged. Mushroom meal is one of them. To date, mushroom meals have been investigated when supplemented in low levels in aquaculture diets. Furthermore, effects of diets supplemented with mushroom meals have assessed different parameters such as, haematology, immunity, anti-bacterial & anti-oxidant activities, and heat stress. Present study, is aimed to study the effects of graded levels of dietary pink oyster mushroom (Pleurotus djamor) meal (POMM), in growth, feed efficiency, protein utilization, digestive enzymes activities and whole body proximate composition of Nile tilapia (Oreochromis niloticus) fingerlings. Experimental design included a control diet (POMM0) formulated with soybean meal, as main protein source, and four diets designed with increasing levels of POMM: 25%(POMM25); 50%(POMM50); 75%(POMM75); and 100%(POMM100). Experimental diets and final whole body were submitted to a proximate composition analysis. Growth, feed efficiency, protein utilization, and digestive enzyme activities were assessed. Compared to POMM0 and POMM25, weight gain (WG), and specific growth rate (SGR), significantly (P<0.05) decreased in fish fed POMM50, POMM75 and POMM100%. Feed conversion ratio (FCR), protein efficiency ratio (PER) and survival rate (SR) were not significantly affected by experimental diets. Daily feed intake (DFI), and daily protein intake (DPI), decreased as POMM increased in diets. Compared to POMM0 experimental group, condition factor (K), showed a significantly higher value in fish fed POMM50, and POMM100 experimental diets. Crude fiber of final whole body of POMM100 resulted significantly higher (P<0.05) compared to that shown in fish fed the rest of experimental diets. Acid and alkaline proteases, trypsin, chymotrypsin, leucine aminopeptidase and amylase of Nile tilapia fingerlings, were not significantly affected by experimental diets. Compared to fish fed POMM0 and POMM25 diets, experimental fish fed POMM50, POMM75, and POMM100 showed a reduction of lipase activity. In conclusion, a POMM level higher than 25% affects growth and lipase activity. While a POMM level higher than 50% affects fiber content in whole body of final fish.

North American Journal of Aquaculture, Jul 2, 2021

In the past decade, different groups of additives (probiotics, oligosaccharides, and plant extrac... more In the past decade, different groups of additives (probiotics, oligosaccharides, and plant extracts) have been widely researched and used in worldwide aquaculture. Recently, other groups, such as biopolymers (e.g., poly‐β‐hydroxybutyrate) with prebiotic properties, have been investigated. Among biopolymers, the use of pure polyhydroxyalkanoate (PHA; composition = 95–100%) as a feed additive in aquaculture has not been studied yet. Therefore, the aim of the present study was to research the effects of four supplementation levels of pure PHA on growth, survival, feed and nutrient utilization, apparent digestibility coefficients (ADCs), and hematology of Nile Tilapia Oreochromis niloticus. Five isonitrogenous and isolipidic diets were designed, including a control (C) diet without PHA supplementation. Remaining diets were supplemented with the following levels of PHA: PHA 0.1% (basal diet + 0.1% PHA), PHA 0.5% (basal diet + 0.5% PHA), PHA 1.0% (basal diet + 1.0% PHA), and PHA 2.0% (basal diet + 2.0% PHA). After a 70‐d feeding test period, the PHA 0.5% and PHA 1.0% experimental groups showed significantly higher final body weight, weight gain, specific growth rate, lipid efficiency and productive value, and ADCs of lipid and energy compared to those of the C group. Protein efficiency ratio was significantly higher in fish fed the PHA 0.1%, PHA 0.5%, and PHA 1.0% diets compared to the C group. Protein productive value significantly increased in the PHA 1.0% group. The ADC of protein was significantly higher in fish fed diets supplemented with any level of PHA compared to C fish. Regarding hematological parameters, hematocrit value showed a significant increase in fish fed PHA 0.1% compared to the C group. Leukocyte composition (%) did not show significant differences among experimental groups. Based on polynomial regression analysis, the optimum inclusion levels of PHA in Nile Tilapia diets were 0.82–0.92% for growth performance, 1.0–1.1% for nutrient utilization, 1.0–1.2% for ADCs, and 1.34% for hematocrit. Cost–benefit ratio analysis revealed nonsignificant but numerical differences among experimental diets. Results suggest that pure PHA, when supplemented at 0.1, 0.5, 1.0, or 2.0%, has certain positive effects on growth, nutrient and feed utilization, and ADCs without compromising Nile Tilapia hematology or health.

Ciência Rural, 2022

ABSTRACT: We search for positive utility impact on the invasive species Pterygoplichthys spp. The... more ABSTRACT: We search for positive utility impact on the invasive species Pterygoplichthys spp. The optimal level of replacement of sardine meal (SM) by Pterygoplichthys spp. meal (PLM) in practical feeds for fry of Nile tilapia (Oreochromis niloticus) was evaluated. We evaluated six experimental diets: 50% PLM-50% SM, 60% PLM-40% SM, 70% PLM-30% SM, 80% PLM-20% SM, 90% PLM-10% SM and 100% PLM-0% SM. In a recirculation system, 270 sex-reversed tilapia fry were used (0.7 ± 0.1 g). Diets were administered in triplicate and the experiment lasted 56 days with sampling every 14 days. There were no statistical differences in growth. At the end of the experiment, the SGR, ADG, CF, WG, DFI, FCR and PER were determined without significant differences (P > 0.05) between treatments, but there was a tendency that could indicated higher WG and PER in the 90% PLM-10% SM treatment (93.56 ± 0.43% and 8.44 ± 1.18 g, respectively). All survival rates were higher than 90% with no significant differen...

Latin American Journal of Aquatic Research, 2020

This research study is focused on the lipid requirements of Petenia splendida (0.65 ± 0.19 g) juv... more This research study is focused on the lipid requirements of Petenia splendida (0.65 ± 0.19 g) juveniles. Fish were fed with trout commercial diet (Silver Cup™ - 45% protein and 16% lipids), as control diet - CD (which is usually used to feed this species at commercial scale), and four isoproteic (45% crude protein) diet formulated with different lipid levels (5, 10, 15 and 20%). Diets were administered for 60 days by triplicate per treatment. Our results showed that fish fed with 10, 15 and 20% lipid levels were significantly higher (P < 0.05) in average weight and total length. Same treatments were significantly lower (P < 0.05) in terms of FCR compared to those shown in 5% and CD. However, fish fed 20% lipid level, showed a significant decrease in WG and a significant (P < 0.05) increase in FCR compared to those shown in 15% lipid level. Fish fed with 15% showed the highest weight gain and the lowest FCR compared with the rest of the treatments. Lipid efficiency ratio (LE...

North American Journal of Aquaculture, Jul 1, 2013

The accuracy of the Content should not be relied upon and should be independently verified with p... more The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden.

Annals of Animal Science, 2020

The aim of this study was to assess quality of SSF (Solid State Fermented) lupin with Lactobacill... more The aim of this study was to assess quality of SSF (Solid State Fermented) lupin with Lactobacillus plantarum 299v, and its effects (on growth, feed utilization, digestibility and immunity) of juvenile Atlantic salmon (S. salar), when used as fish meal replacer. Five experimental diets were formulated to provide 40% crude protein and 21% dietary lipid (dry matter basis) with the raw or fermented lupin meal-based protein source replacing fish meal at 15% and 30%. Triplicate groups of fish (averaging 3.53 ± 0.05 g) were fed with experimental diets for 8 weeks. Fermentation process modified nutrient profile of lupin meal and enriched it with lactic, citric and acetic acids. Fish in the FL15% group showed a higher (P < 0.05) final body weight, weight gain, FCR, SGR, and PER compared to those of C group. Apparent digestibility coefficient (ADC) of protein and Nitrogen-free extract showed a significantly higher values in FL15% experimental group, compared to those shown in C group. Fis...

CABI Compendium

This datasheet on Rachycentron canadum covers Identity, Overview, Associated Diseases, Pests or P... more This datasheet on Rachycentron canadum covers Identity, Overview, Associated Diseases, Pests or Pathogens, Distribution, Dispersal, Biology & Ecology, Environmental Requirements, Natural Enemies, Impacts, Uses, Management, Genetics and Breeding, Economics, Further Information.

水産増殖 the Aquiculture, Dec 20, 2009

North American Journal of Aquaculture, 2013

This study investigated the single and combined effects of pre- and probiotics supplement on the ... more This study investigated the single and combined effects of pre- and probiotics supplement on the growth performance and immune response of rainbow trout. Seven diets supplemented with 1% Enterococcus faecalis (E), 0.4% mannan oligosaccharides (M) and 1% polyhydroxybutyrate (P) in single (E, M and P diets), double (EM and EP diets) or triple combinations (EMP diet) were fed to juvenile rainbow trout (13.2±0.25 g) for 12 weeks. During the feeding test, the fish were healthy and no mortality occurred. Although weight gain and specific growth rate (SGR) were significantly higher (P＜0.05) in the fish fed single supplementation of mannan oligosaccharides, its combined supplementation together with E. faecalis showed further improvement of growth as well as feed gain ratio (FGR). On the other hand, single administration of E. faecalis could not improve any growth performance parameter. In addition, E. faecalis improved the immunological parameters such as hematocrit value, phagocytic index...