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Activities of selected digestive enzymes during larval development of large yellow croaker (Pseudosciaena crocea) ArchiMer
Ma, Hongming; Cahu, Chantal; Zambonino, Jose-luis; Yu, Hairui; Duan, Qingyuan; Le Gall, Marie-madeleine; Mai, Kangsen.
Large yellow croaker is an important marine fish species for aquaculture in China. Larval rearing of this species is still based on live prey feeding. The aim of this study was to describe the onset and development of the main digestive enzymes during larval development of this species, in order to obtain essential data for the formulation of a compound diet adapted to larvae. Enzymatic assays were conducted from day I post hatching to day 40 in larvae fed the following live prey sequence: rotifers, Artemia nauplii, copepods, and then frozen copepods. Assays were done on whole larvae until day 19, then on dissected larvae and on purified brush border membranes of intestine. Pancreatic enzymes, amylase, and trypsin, showed high activities from early stages,...
Tipo: Text Palavras-chave: Trypsin; Pseudosciaena crocea; Fish larval development; Amylase; Aminopeptidase N; Alkaline phosphatase.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-444.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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Determining how the pelagic ecosystem over the continental shelf of the Bay of Biscay (NE Atlantic) functions: An approach using mesozooplankton enzyme activities as descriptors ArchiMer
Bergeron, Jean-pierre; Delmas, Daniel; Koueta, Noussithe.
A fisheries research cruise conducted in 2000 offered a first opportunity to take simultaneous measurements of the activities of three enzymes in mesozooplankton samples collected at a regional scale over the continental shelf of the Bay of Biscay in the NE Atlantic, with the aim of characterizing main aspects of the functioning of the biotic environment of small pelagic fish populations. The activity of the digestive endopeptidase trypsin was selected to characterize the assimilation rate of proteins, whereas pyruvate kinase (PK) was chosen as an indicator of carbohydrate assimilation and aspartate transcarbamylase (ATC) provided an overall assessment of mesozooplankton productivity. The Bay of Biscay region is subject to various strong physical driving...
Tipo: Text Palavras-chave: Trypsin; Pyruvate kinase; Metabolic descriptors; Mesozooplankton; Bay of Biscay; Aspartate transcarbamylase.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6359.pdf
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Eficiencia da farinha desengordurada de gergelim como complemento proteico da farinha extrudada de caupi. Repositório Alice
MAIA, G.A.; CALVETE, Y.M. de A.; TELLES, F.J.S.; MONTEIRO, J.C.S.; SALES, M.G..
O objetivo deste trabalho foi promover uma avaliacao nutricional da mistura proteica desengordurada, obtida do gergelim (Sesamum indicum L.), com a farinha extrudada do caupi (Vigna unguiculata L. Walp), utilizando-se metodos fisicos, bioquimicos, nutricionais e sensoriais. Usando-se semente integral do gergelim, com 54,08% de oleo e 21,83% de proteina, obteve-se a semente descascada com baixa concentracao de oxalatos, que foi usada para a producao de farinha desengordurada de gergelim (FDG) contendo 2,81% de oleos e 59,16% de proteina. A principal caracteristica desta farinha foi sua alta concentracao de aminoacidos sulfurados (30,88 mg/g proteina). Essa FDG foi usada como complemento da proteina da farinha do caupi obtida pelo processo de cozimento por...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Sesamum indicum; Vigna unguiculata; Oxalatos; Aminoacidos sulfurados; Tripsina; Oxalates; Sulphur amino acids; Trypsin.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/89615
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Enzymatic response of the eucalypt defoliator Thyrinteina arnobia (Stoll) (Lepidoptera: Geometridae) to a bis-benzamidine proteinase inhibitor. Repositório Alice
PRADO, J. S. M.; LOURENÇÃO, A. L.; GUEDES, R. N. C.; PALLINI, A.; OLIVEIRA, J. A.; OLIVEIRA, M. G. A..
Ingestion of proteinase inhibitors leads to hyperproduction of digestive proteinases, limiting the bioavailability of essential amino acids for protein synthesis, which affects insect growth and development. However, the effects of proteinase inhibitors on digestive enzymes can lead to an adaptive response by the insect. In here, we assessed the biochemical response of midgut proteinases from the eucalypt defoliator Thyrinteina arnobia (Stoll) to different concentrations of berenil, a bisbenzamidine proteinase inhibitor, on eucalyptus. Eucalyptus leaves were immersed in berenil solutions at different concentrations and fed to larvae of T. arnobia. Mortality was assessed daily. The proteolytic activity in the midgut of T. arnobia was assessed after feeding...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Synthetic inhibitor; Trypsin; Pest control.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/953013
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Influence of dietary live yeast on European sea bass (Dicentrarchus labrax) larval development ArchiMer
Tovar Ramirez, Dariel; Zambonino, Jose-luis; Cahu, Chantal; Gatesoupe, Joel; Vazquez Juarez, R.
Recent results have demonstrated that live yeast in diets improved gut maturation in sea bass larvae. In this study, we tested the absence and two levels of live yeast in sea bass larvae diets. Specimens were fed from time of mouth opening to 37 days after hatching a diet of 0%, 1.1%, or 5.7% wet weight of live yeast (Debaryomyces hansenii CBS 8339). Yeast incorporation improved survival 10%, and reduced malformed larvae. In groups fed 1.1% yeast, only 1% of larvae were malformed, compared to 14% in the control group. Final mean weight in groups fed 1.1% yeast was twice that of other groups. Activities and concentrations of mRNA trypsin and lipase were higher in the two groups fed yeast than in the control group, whereas activity and concentration of mRNA...
Tipo: Text Palavras-chave: Polyamines; Lipase; Trypsin; Amylase; Enzymes; Gut maturation; Fish larvae.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-831.pdf
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Nutritional condition of anchovy Engraulis encrasicolus larvae in connection with mesozooplankton feeding catabolism in the southern Bay of Biscay, NE Atlantic ArchiMer
Bergeron, Jean-pierre.
The study examines the spatial variations over the French continental shelf of the southern Bay of Biscay (North-East Atlantic) in the nutritional condition of anchovy (Engraulis encrasicolus L.) larvae which was estimated through their DNA/C index. The same cruise yielded quantitative estimates of two metabolic descriptors of the functioning of mesozooplanktonic communities, the enzymes pyruvate kinase (PK) and trypsin, for the first time evaluated simultaneously. The aim was to appraise quality and quantity of matter assimilated by the mesozooplankton and to specify whether the main components of prey ingested by copepods are principally carbohydrates, through PK activity, or protein, under the action of the digestive endopeptidase trypsin. The larval...
Tipo: Text Palavras-chave: Anchovy larvae; Bay of Biscay; DNA/C index; Mesozooplankton; Pyruvate kinase; Trypsin.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6473.pdf
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Role of Chicken Pancreatic Trypsin, Chymotrypsin and Elastase in the Excystation Process of Eimeria tenella Oocysts and Sporocysts OAK
Guyonnet, Vincent; Johnson, Joyce K.; Long, Peter L..
The role of pancreatic proteolytic enzymes in the excystation process of Eimeria tenella oocysts and sporocysts was studied in vitro. Intact sporulated oocysts were preincubated in phosphate buffer, NaCl 0.9% (PBS) added with 0.5% chicken bile extract in a 5% C02 atmosphere for 30 minutes prior to exposure to either 0.25% (w/v) chicken trypsin, chymotrypsin, pancreatic elastase, or a 1% (w/v) crude extract of unsporulated and sporulated oocysts of E. tenella (Expt.1). No excystation was observed under these conditions. Sporocysts were also incubated under the same conditions without pretreatment in C02. Excystation was observed for sporocysts incubated with either trypsin, chymotrypsin or pancreatic elastase, the best percentage of excystation being...
Palavras-chave: Chymotrypsin; Eimeria tenella; Elastase; Excystation; Trypsin.
Ano: 1991 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/155
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