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| Registros recuperados: 28 | |
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| Gaxiola, Gabriela; Gallardo, Pedro; Simoes, Nuno; Cuzon, Gerard. |
| Red shrimp, Farfantepenaeus brasiliensis, larvae's response to different concentrations of live foods (diatoms Chaetoceros gracilis: 20-100 x 103 cells/mL; flagellate Tetraselmis chuii: 2-10 x 103 cells/mL and Artemia nauplii [NA]: 1-5 NA/mL) was investigated in three experiments. Experimental assessments were based on four variables: survival rate, weight gain, development index (DI), and resistance to salinity stress. A combination of C. gracilis 80 x 103 cells/mL, T. chuii 2 x 103 cells/mL, and Artemia 4 NA/mL provided the best experimental response. Specifically, F. brasiliensis larvae fed with the above-mentioned optimal concentrations of microalgae and Artemia grew faster and reached the postlarval stage in less time (168 h) than larvae in other... |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00028/13928/11639.pdf |
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| Bourgeois, B.; Cuzon, Gerard; Aquacop. |
| Ce travail représente une contribution à l'étude de la biologie et de la croissance de la crevette d'eau douce Macrobrachium rosenbergi i (de Man) et de la crevette de mer Penaeus mergaiensis (de Han). Les étapes successives de la période d'intermue ont été déterminées sur des juvéniles afin de pouvoir par la suite approfondir les connaissances de quelques paramètres physiologiques relatifs à la croissance de ces deux espèces. Les notions fondamentales sur le cycle d'intermue des crustacés apportées par Drach (1939) pour les Brachyoures adultes, sont valables avec de légères modifications pour tous les Décapodes qui présentent un exosquelette bien calcifié. Le schéma a été légèrement modifié par le m~e auteur (1944-1967) pour les Natantia dont... |
| Tipo: Text |
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| Ano: 1975 |
URL: http://archimer.ifremer.fr/doc/00172/28287/26550.pdf |
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| Chavez-calvillo, G.; Perez-rueda, E.; Lizama, G.; Zuniga Aguilar, J. J.; Gaxiola, G.; Cuzon, Gerard; Arena-ortiz, L.. |
| We evaluated changes in gene expression of Litopenaeus vannamei shrimp in response to a change in diet by comparing specimens which were fed with an animal protein diet against those which underwent a change from an animal protein diet to a plant protein diet. In addition, we also compared specimens which were fed with a plant protein diet with another group which underwent a change from plant to animal protein diet. Results showed that, in the case of hepatopancreas tissue, a total of six genes were differentially expressed and exhibited a high degree of homology with sequences which codify for proteins related to metabolism, transcription regulation, and rRNA subunits. In the case of muscle tissue, four differentially expressed sequences were recorded... |
| Tipo: Text |
Palavras-chave: Differential display; RT-PCR; Litopenaeus vannamei; Protein diet; Alternative protein sources. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00002/11298/7853.pdf |
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| Maldonado, Carlos; Cuzon, Gerard; Guzman, Emilio; Brito, Roberto; Soto, Luis; Arena, Leticia; Gaxiola, Gabriela. |
| Herbivorous (20% vegetable protein, 40% carbohydrate) and carnivorous diets (40% marine animal protein, 20% carbohydrate) were experimentally tested to assess their effect on the energy balance and energetic substrates utilized by postlarvae (PL's /15 days) and juvenile shrimp (3-6 g) of Litopenaeus vannamei. Postlarval stage 60 (PL60, early juveniles) shrimps fed HeD and CaD diets, then late juveniles (3-6 g) acclimated to the same diets were tested for their respective energy partitioning potential. No significant differences (p>0.05) on growth were obtained in early juveniles (mean final wet weight of 0.19 g). However in late juvenile stages a significant difference (p<0.05) in growth rate was observed. In terms of energy partitioning, both early... |
| Tipo: Text |
Palavras-chave: Energy; Juveniles; Metabolism; Protein sources; Shrimp. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7402.pdf |
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| Gauquelin, F; Cuzon, Gerard; Gaxiola, G; Rosas, C; Arena, L; Bureau, D; Cochard, Jean-claude. |
| A study was conducted using a bioenergetics approach to generate information on energy requirement and feed utilization of Litopenaeus stylirostris. Animals (initial mean weight 21 +/- 1 g were fed ad libitum six experimental diets, ranging from 25 to 58% crude protein (CP), for 50 days. Weight gain increased from 21 to 30 g with increasing dietary protein level. Survival rates averaged 80%. Basal metabolism (HeE) and heat increment of feeding (HiE) were monitored using respirometry. HeE was on average I U shrimp(-1) day(-1) or 47 U kg live weight(-1) day (22 kJ/kg(0.8). d(-1)), slightly more than what is observed in fish. HiE averaged 0.2 W/sbrimp(-1) day(-1) or 10 W kg live weight(-1) day(-1) (4 kJ/kg(0.8) d(-1)). It represented 3 1 % and 12%... |
| Tipo: Text |
Palavras-chave: Respiration; Excretion; Growth; Dietary protein; L. stylirostris. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-6263.pdf |
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| Rosas, C; Tut, J; Baeza, J; Sanchez, A; Sosa, V; Pascual, C; Arena, L; Domingues, P; Cuzon, Gerard. |
| The present study was designed to test the effects of type of binder on growth, nutritional physiology, total apparent digestibility, and some elements of the energetic balance of early O. maya juveniles. Two experiments were performed. One was aimed at evaluating the effect of type of binder on growth, nutritional physiology, and energetic balance and the other at knowing the effect of the binder on total apparent digestibility of O. maya. Binder type affected growth and survival of early O. maya juveniles. Octopuses fed alginate-bound crab meat lost weight and died, revealing that this type of binder limits nutrient absorption from the diet. In contrast, when gelatin was used as binder, energetic balance was similar to that obtained in animals fed... |
| Tipo: Text |
Palavras-chave: Growth rate; Energetic balance; Diet binder; Digestibility; Octopus maya. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-3949.pdf |
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| Jimenez Yan, L; Brito, A; Cuzon, Gerard; Gaxiola, G; Garcia, T; Taboada, G; Soto, L; Brito, R. |
| L. vannamei postlarvae are normally raised with a protein dense diet (50% protein) rich in fishmeal. Part of the protein is utilized for energy purpose instead of protein synthesis. Based on a previous energy partitioning study, the effects of two isoenergetic compounded feed treatments - animal protein (AP) and vegetable protein and carbohydrates (VPC) - upon growth efficiency and energy budget of shrimp postlarvae and early juveniles were determined. Recovered energy (RE) or production (P) after 50 days trial was similar (2 J day(-1)) in both treatments, from PL14 to PL19. However, early juveniles discriminated between animal protein (116 J day(-1)) and vegetable protein and carbohydrates (88 J day(-1)). The difference in respiration indicated a higher... |
| Tipo: Text |
Palavras-chave: Shrimp; Physiology; Vegetable protein; Animal protein; Energy; Juvenile; Postlarvae. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1879.pdf |
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| Cuzon, Gerard; Amouroux, J.m. |
| Labelled compounds open the way to the study of feed intake mechanisms and assimilation by mollusks and crustacean. When coupling bioassay and modelling, those studies will bring consistent input to the knowledge of fluxes between the animal and its environment (feed, dissolved substances, C02, bacteria). Analog models are used as tool to better understand feed intake and assimilation in shrimp cultured in tanks |
| Tipo: Text |
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| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00040/15131/12469.pdf |
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| Farias, Ana; Pereda, Sandra V.; Uriarte, Iker; Doerner, Jessica; Cuzon, Gerard; Rosas, Carlos. |
| The aim of this study was to evaluate the performance of Patagonian octopus fed with moist diets formulated with several local feed ingredients. All formulated diets were based on crab paste (70%) and the experimental feed ingredient (30%). Experiment I assayed salmon meal, prime sardine meal, and wheat gluten, using fresh fish as a control; experiment 2 assayed prime fish meal and macroalgal meal against crab paste alone as a control. The ingestion rate was lower than expected for all diets except those of fresh fish, crab paste alone, and crab paste plus prime sardine meal. No significant differences were found in the observed digestibility of the diets, indicating, in general, low digestibility, even for fresh fish. The highest protease values were... |
| Tipo: Text |
Palavras-chave: Octopus; Emeroctopus megalocyathus; Digestibility; Enzymes; Consumption rate; Nutrition; Moist diets. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00030/14106/11342.pdf |
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| Emerenciano, Mauricio; Cuzon, Gerard; Goguenheim, Jean; Gaxiola, Gabriela. |
| The floc system has been successfully applied for shrimp grow-out, but little is known about floc contribution on reproductive performance. In a 30-day trial, spawning performance of broodstock was evaluated in floc and earthen ponds. Floc spawners achieved better results (P < 0.05) compared with pond spawners in terms of number of spawns per ablated female (2.9 vs. 1.3), spawns per spawning female (3.6 vs. 2.4) and number of consecutive maturation (average of 3.6 times compared with 2.5 times in ponds females). Latency period was lower for floc spawners (7.4 days) than pond spawners (10.7 days) (P < 0.05). The percentage of females that spawned at least once were higher in floc (77.1%) when compared with pond spawners (53.8%) (P < 0.05). Number... |
| Tipo: Text |
Palavras-chave: Floc; Litopenaeus stylirostris; Reproduction; Broodstock. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00115/22638/21495.pdf |
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| Li, Erchao; Arena, Leticia; Lizama, Gabriel; Gaxiola, Gabriela; Cuzon, Gerard; Rosas, Carlos; Chen, Liqiao; Van Wormhoudt, Alain. |
| Improvement in the osmoregulation capacity via nutritional supplies is vitally important in shrimp aquaculture. The effects of dietary protein levels on the osmoregulation capacity of the Pacific white shrimp (L. vannamei) were investigated. This involved an examination of growth performance, glutamate dehydrogenase (GDH) and Na+-K+ ATPase mRNA expression,, and GDH activity in muscles and gills. Three experimental diets were formulated, containing 25%, 40%, and 50% dietary protein, and fed to the shrimp at a salinity of 25. After 20 days, no significant difference was observed in weight gain, though GDH and Na+-K+ ATPase gene expression and GDH activity increased with higher dietary protein levels. Subsequently, shrimp fed diets with 25% and 50% dietary... |
| Tipo: Text |
Palavras-chave: Litopenaeus vannamei; Gene expression; Glutamate dehydrogenase; Na+-K+ ATPase; Protein; Salinity. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00031/14261/11692.pdf |
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| Martinez, Romain; Santos, R.; Alvarez, A.; Cuzon, Gerard; Arena, L.; Mascaro, M.; Pascual, C.; Rosas, C.. |
| Proteinases from hepatopancreas (HP) and gastric juice (GJ) from wild and cultured red octopus (Octopus maya) were characterized. Hepatopancreas assays revealed optimal activity at pH 4, 9-10 and 10 for wild and pH 3, 8, and 9, for cultured octopuses, for total proteinases, trypsin and chymotrypsin, respectively. In the gastric juice, maximum activity was recorded at pH 6, 8, and 7 for total proteinases, trypsin, and chymotrypsin, respectively for both wild and cultured octopus. A reduction on enzyme activity of 70 and 20% was observed in HP and GJ extracts, respectively when protease inhibitor Pepstatin A was used. That result suggests that the main proteases in the HP were aspartic acid proteinases type (possibly Cathepsin D) and some of them were... |
| Tipo: Text |
Palavras-chave: Cephalopods; Digestive proteinases; Hepatopancreas; Gastric juice; Octopus maya. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00036/14683/17998.pdf |
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| Luis Bonilla-gomez, Jose; Chiappa-carrara, Xavier; Galindo, Carmen; Jeronimo, Gilberto; Cuzon, Gerard; Gaxiola, Gabriela. |
| Changes in metabolite levels in hemolymph and hepatopancreas were used as indicators of physiological status of juvenile wild and cultivated Farfantepenaeas. duorarum (Burkenroad, 1939), during hyper-osmoregulatory conditions (salinity 22 ppt, 726 mOsm/kg). We analyzed the relationship between biochemical changes of wild and cultivated shrimp at different molt stages by measurement of osmotic capacity, hemocyanin, acylglycerides, cholesterol, glucose, glycogen and total protein. Biochemical analyses of hemolymph (blood) and hepatopancreas showed a decreasing trend in stages closer to molt and an increasing trend before intermolt. Osmotic capacity and blood proteins indicated a significant effect of the molt stage. Stages A. D1' and D''' showed the greatest... |
| Tipo: Text |
Palavras-chave: Biochemical analysis; F. duorarum; Molt stages; Osmoregulation. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00088/19936/17773.pdf |
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| Galindo, Carmen; Gaxiola, Gabriela; Cuzon, Gerard; Chiappa-carrara, Xavier. |
| Biochemical changes, specifically in hemocyanin and glucose concentrations in hemolymph, glycogen in the digestive gland. were studied throughout the molt cycle in juveniles of Litopenaeus vannamei in a high salinity condition (36), and related to variations in the osmotic capacity of organisms. Increasing hemolymph volume before molting modifies circulating glucose and hemocyanin concentrations acting on the osmotic capacity. Variations in glucose concentrations are indicators of differential energy requirements throughout the molt cycle. Hemocyanin was used as an indirect indicator of the energy consumed by shrimp in various molt processes that affect the osmotic capacity. The co-variability of these metabolites is the result of the biochemical... |
| Tipo: Text |
Palavras-chave: Molt cycle; Litopenaeus vannamei; Hypo osmotic conditions; Biochemistry. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6899.pdf |
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| Aguilera-rivera, Diana; Prieto-davo, Alejandra; Escalante, Karla; Chavez, Cristina; Cuzon, Gerard; Gaxiola, Gabriela. |
| The advantages of FLOC over clear water (CW) in rearing juvenile L. vannamei and its effects on Vibrio communities were evaluated. Survival rate in FLOC and clear water were recorded and a probiotic was tested under both conditions. Daily growth rate (DGR) was higher in FLOC (p < 0.05) than in CW. Survival in each system increased significantly when a probiotic was included in the diet (p < 0.05). The Vibrionaceae community from the hepatopancreas (HP) and the culture medium did not differ between the two culture media. Nevertheless, a novel group of Vibrio strains was found to be unique to FLOC. No high level of lesions was observed in shrimp tissues from the FLOC + probiotic treatment; it suggests that the probiotic contributed to homeostasis and... |
| Tipo: Text |
Palavras-chave: FLOC; Probiotic; L. vannamei; Disease; Vibrio. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00173/28379/26694.pdf |
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| Registros recuperados: 28 | |
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