FN Archimer Export Format
PT J
TI Digestive enzyme activity and food ingesta in juvenile shrimp Litopenaeus vannamei (Boone, 1931) as a function of body weight
BT 
AF GAMBOA DELGADO, Julián
   MOLINA POVEDA, César
   CAHU, Chantal
AS 1:;2:;3:;
FF 1:;2:;3:PDG-DRV-RA-ARN;
C1 Fdn CENAIM ESPOL, Guayaquil, Ecuador.
   IFREMER, Ctr Brest, INRA, Unite Mixte Nutr Poisson, Plouzane, France.
C2 FDN CENAIM ESPOL, ECUADOR
   IFREMER, FRANCE
SI BREST
SE PDG-DRV-RA-ARN
IN WOS Ifremer jusqu'en 2018
IF 0.766
TC 60
UR https://archimer.ifremer.fr/doc/2003/publication-902.pdf
LA English
DT Article
DE ;Semi intensive culture;Stomach content;Digestive enzymes;Litopenaeus vannamei;Shrimp
AB A study was conducted to evaluate variations of digestive enzyme activities in Litopenaeus vannamei (Boone) reared in commercial ponds under semi-intensive conditions. Shrimp were collected at each body weight increase of 2 g. As the shrimp grew (2-12 g), significant increases in the activities of lipase and chymotrypsin were observed. The total protease activity decreased from 6 g onwards. Trypsin activity showed a peak at 6 g and amylase activity increased two-fold after 2 g. Additionally, the stomach contents were analysed microscopically for shrimp between 2 and 10 g. Plant matter contributed above 30% of the total stomach content in 6-, 8- and 10-g shrimp. Detritus represented 58% and 62% of the total stomach content in 2- and 4-g shrimp, respectively, decreasing to 33-43% at greater shrimp weights. Artificial feed showed a maximum contribution of 20% in 6-g shrimp. The present results show changes in the enzyme activity after the shrimp reach 6 g in body weight, evidenced by a decrease in total protease and an increase in lipase and amylase activities. The amylase/protease ratio was 2.6 in 2-g shrimp and increased steadily to 9.6 in 12-g shrimp. These findings suggest an adaptation of the enzymatic activity to diets with lower protein content as body weight increases, and may be related to the variation of the different items found in the stomach.
PY 2003
PD DEC
SO Aquaculture Research
SN 1355-557X
PU Blackwell science
VL 34
IS 15
UT 000187154600005
BP 1403
EP 1411
DI 10.1111/j.1365-2109.2003.00959.x
ID 902
ER

EF