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Adaptation des enzymes digestives à l'alimentation chez la crevette Penaeus vannamei (Crustacea Decapoda) ArchiMer
Le Moullac, Gilles.
L'adaptation des enzymes digestives chez la crevette P. vannamei a été étudiée en fonction des cycles biologiques en relation avec les constituants de l'alimentation principalement les glucides (amidon) et les protéines. La trypsins, la chymotrypsine et 1'amylase, 3 enzymes majeures, chez P. vannamei ont été purifiées et caractérisées. La trypsine est formée de 3 isoenzymes dont le poids moléculaire apparent est compris entre 31 et 3 2 kDa. La nature glycosylée de la trypsine est révélée. La chymotrypsine est formée de 2 isoenzymes de poids moléculaire similaire (24 kDa). L'amylase purifiée est constituée de 2 isoenzymes dont le poids moléculaire apparent est de 31 kDa. Les propriétés biochimiques sont étudiées. L'étude immunologique a permis de mesurer...
Tipo: Text Palavras-chave: Penaeus vannamei; Hécatopancréas; Biochimie; Immunologie; Enzymes digestives; Trypsine; Chymotrypsine; Amylase; Larves; Adultes; Intermue; Protéines alimentaires; Amidon; Nutrition; Adaptation.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00029/14012/11198.pdf
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Adaptation of digestive enzymes to dietary protein, carbohydrate and fibre levels and influence of protein and carbohydrate quality in Penaeus vannamei larvae (Crustacea, Decapoda) ArchiMer
Le Moullac, Gilles; Van Wormhoudt, A; Aquacop, Aquacop.
Activity of digestive enzymes (trypsin, chymotrypsin and amylase) was studied in relation with food in Penaeus vannamei larvae first stages. Microparticles containing casein involved the decrease of soluble protein content and enzyme activities. Specific trypsin activity but not chymotrypsin was correlated (p<1%) to casein level between 10 and 60% in microparticles. Cellulose fibres in food seemed to have little effect on digestive enzymes. Starch, between 1 and 20% in microparticles, had no influence on specific amylase activity. The effect of different feeding conditions were also tested on growth. No clear relationship between growth and enzyme is established since only trypsin is concerned in the case of a casein dose effect in the food. The protein...
Tipo: Text Palavras-chave: Amylase; Chymotrypsin; Trypsin; Digestive enzymes; Food; Larvae; Penaeus vannamei; Amylase; Chymotrypsine; Trypsine; Enzymes digestives; Alimentation; Larve; Penaeus vannamei.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-4431.pdf
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Variations des activites digestives en fonction des facteurs du milieu chez les crustaces ArchiMer
Galgani, Francois; Benyamin, Y; Vanworhmoudt, A; Cecaldi, J.
Proteolytic enzymes of hepatopancreas of six species of peneids (Penaeus kerathurus, P. japonicus, P. monodon, P. stylirostris, P. merguiensis and P. vannamei ) have been studied. Some of their physiological variations have been characterised. Increase in acclimation temperature of crustaceans enhances increase of specific activities of proteases. Variations of salinity does not modify specific activities, nor quantities of trypsin, nor electrophoretic patterns of these different proteases.
Tipo: Text Palavras-chave: Penaeus kerathurus; Penaeidae; Malacostraca; Diets; Growth; Larval development; Life cycle; Acclimation; Environmental effects; Digestive glands; Enzymatic activity; Salinity effects; Temperature effects; Enzymes; Endocrinology; Digestion; Développement larvaire; Croissance; Cycle d'intermue; Carboxypeptidase A and B; Leucine aminopeptidase; Chymotrypsin; Trypsine; Enzymes digestives; Homarus ganmarus; Palaemon serratus; P. vannamei; P. merguiensis; P. stylirostris; P. monodon; P. japonicus; Penaeus keratkurus.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1195.pdf
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