EFFECT OF THE MOLECULAR-FORM OF DIETARY NITROGEN SUPPLY IN SEA BASS LARVAE - RESPONSE OF PANCREATIC-ENZYMES AND INTESTINAL PEPTIDASES

被引：78

作者：

CAHU, CL

INFANTE, JLZ

机构：

[1] Unité Mixte de Nutrition des Poissons IFREMER-INRA, IFREMER Centre de Brest, Plouzané, 29280

来源：

FISH PHYSIOLOGY AND BIOCHEMISTRY | 1995年 / 14卷 / 03期

关键词：

AMINO ACIDS; AMYLASE; BRUSH BORDER PEPTIDASES; COMPOUND DIET; CYTOSOLIC PEPTIDASE; LARVAE; MARINE FISH; PROTEIN HYDROLYSATE; TRYPSIN;

D O I：

10.1007/BF00004311

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Sea bass (Dicentrarchus labrax) larvae were weaned at day 25 with microparticulated diets in which 10% of the nitrogen supply had different molecular forms: amino acid mixture (SLAA), casein hydrolysate (SLH) or fish meal (SLP). The control group (LP) was fed live prey. No difference was observed in larval growth between the weaned groups, but the survival was significantly higher in the SLH group. Trypsin secretion was stimulated in the SLAA group, whereas the SLH diet reduced the secretion from the exocrine pancreas. The activity of the leucine-alanine peptidase, located in the cytosol of enterocytes, remained high in all weaned groups. However, the activity of the peptidases of the brush border membrane increased during the development phase in the control group. These results suggest that weaning with a classic compound diet delays enterocyte differentiation by maintaining the larval features of digestion. A compound diet containing protein hydrolysate can attenuate the delay of intestinal maturation.

引用

页码：209 / 214

页数：6

共 32 条

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