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| Registros recuperados: 28 | |
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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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| 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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| Aragon-axomulco, Heron; Chiappa-carrara, Xavier; Soto, Luis; Cuzon, Gerard; Arena, Leticia; Maldonado, Carlos; Cardenas, Rene; Gaxiola, Gabriela. |
| In view of the relationship between shifts in diet composition and the activity of digestive enzymes in penaeid shrimp, the present study focused on the analysis of digestive trypsin and a-amylase activities of wild Farfantepenaeus. duorarum (Burkenroad, 1939) juveniles and their changes in phenotypic expression, during the molt cycle as endogenous factor and their changes due to different feeding regimes (exogenous factor) in relation with delta C-13 and delta N-15 isotopic signature as an index of food assimilation induced by the seasonal availability of food items in the nursery area. Wild juveniles of F. duorarum were captured from April 2007 to February 2008, in the Celestun coastal lagoon, Yucatan, Mexico. Samplings were carried out considering all... |
| Tipo: Text |
Palavras-chave: Coastal lagoons; Digestive enzymes; Farfantepenaeus duorarum; Feeding habits; Pink shrimp. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00078/18880/16487.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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| 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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| 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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| Registros recuperados: 28 | |
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