Advanced search
1 file | 366.96 KB

Laboratory investigation of daily food intake and gut evacuation in larvae of African catfish Clarias gariepinus under different feeding conditions

(2010) AQUACULTURE INTERNATIONAL. 18(2). p.119-134
Author
Organization
Abstract
Temporary accumulation of ascorbic acid 2-sulfate (AAS) was measured to estimate food intake and gut evacuation in larvae of African catfish. Fish larvae were fed decapsulated cysts of Artemia containing AAS. In a first experiment it was found that no biosynthesis of AAS occurs in the larvae of this species. In a second experiment, the gut contents of the fish larvae fed were calculated as they changed during development. In a third experiment, the gut evacuation rate of fish larvae was determined during continuous and discontinuous feeding regimes in the first five days after the start of exogenous feeding. Food consumption by catfish larvae increased from 46.5% of their body dry weight (BDW) on day 1 after the start of exogenous feeding to 53.8% BDW on day 3. Thereafter, food consumption decreased to 27.8% BDW on day 5. A similar pattern was observed for gut evacuation, which increased during the first days of exogenous feeding and decreased as fish growth continued. The rate of gut evacuation in a continuous feeding regime was significantly higher (P < 0.05) than that under discontinuous feeding. On day 1 post-hatch and 7 h after first food ingestion the fish larvae evacuated 87% of the food in continuous feeding compared with 43% under discontinuous feeding. It was found that gut emptying differs during larval development. Under continuous feeding, on days 1 and 3 post-hatch and 11 h after the first meal 90% of the food was evacuated compared with 71% evacuated on day 5. The advantages and limitations of the AAS method for estimation of food consumption by fish larvae are discussed.
Keywords
food consumption, feed intake, gut evacuation, SHRIMP ARTEMIA-SALINA, fish larvae, gut emptying, ASCORBIC-ACID, GASTRIC EVACUATION, BURCHELL LARVAE, FISH LARVAE, MICROPARTICULATE DIETS, GROWTH, ARTIFICIAL DIETS, INGESTION, CONSUMPTION

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 366.96 KB

Citation

Please use this url to cite or link to this publication:

Chicago
García-Ortega, Armando, Johan Verreth, KAREN VERMIS, Hans Nelis, Patrick Sorgeloos, and Martin Verstegen. 2010. “Laboratory Investigation of Daily Food Intake and Gut Evacuation in Larvae of African Catfish Clarias Gariepinus Under Different Feeding Conditions.” Aquaculture International 18 (2): 119–134.
APA
García-Ortega, A., Verreth, J., VERMIS, K., Nelis, H., Sorgeloos, P., & Verstegen, M. (2010). Laboratory investigation of daily food intake and gut evacuation in larvae of African catfish Clarias gariepinus under different feeding conditions. AQUACULTURE INTERNATIONAL, 18(2), 119–134.
Vancouver
1.
García-Ortega A, Verreth J, VERMIS K, Nelis H, Sorgeloos P, Verstegen M. Laboratory investigation of daily food intake and gut evacuation in larvae of African catfish Clarias gariepinus under different feeding conditions. AQUACULTURE INTERNATIONAL. 2010;18(2):119–34.
MLA
García-Ortega, Armando, Johan Verreth, KAREN VERMIS, et al. “Laboratory Investigation of Daily Food Intake and Gut Evacuation in Larvae of African Catfish Clarias Gariepinus Under Different Feeding Conditions.” AQUACULTURE INTERNATIONAL 18.2 (2010): 119–134. Print.
@article{976067,
  abstract     = {Temporary accumulation of ascorbic acid 2-sulfate (AAS) was measured to estimate food intake and gut evacuation in larvae of African catfish. Fish larvae were fed decapsulated cysts of Artemia containing AAS. In a first experiment it was found that no biosynthesis of AAS occurs in the larvae of this species. In a second experiment, the gut contents of the fish larvae fed were calculated as they changed during development. In a third experiment, the gut evacuation rate of fish larvae was determined during continuous and discontinuous feeding regimes in the first five days after the start of exogenous feeding. Food consumption by catfish larvae increased from 46.5\% of their body dry weight (BDW) on day 1 after the start of exogenous feeding to 53.8\% BDW on day 3. Thereafter, food consumption decreased to 27.8\% BDW on day 5. A similar pattern was observed for gut evacuation, which increased during the first days of exogenous feeding and decreased as fish growth continued. The rate of gut evacuation in a continuous feeding regime was significantly higher (P {\textlangle} 0.05) than that under discontinuous feeding. On day 1 post-hatch and 7 h after first food ingestion the fish larvae evacuated 87\% of the food in continuous feeding compared with 43\% under discontinuous feeding. It was found that gut emptying differs during larval development. Under continuous feeding, on days 1 and 3 post-hatch and 11 h after the first meal 90\% of the food was evacuated compared with 71\% evacuated on day 5. The advantages and limitations of the AAS method for estimation of food consumption by fish larvae are discussed.},
  author       = {Garc{\'i}a-Ortega, Armando and Verreth, Johan and Vermis, Karen and Nelis, Hans and Sorgeloos, Patrick and Verstegen, Martin},
  issn         = {0967-6120},
  journal      = {AQUACULTURE INTERNATIONAL},
  keyword      = {food consumption,feed intake,gut evacuation,SHRIMP ARTEMIA-SALINA,fish larvae,gut emptying,ASCORBIC-ACID,GASTRIC EVACUATION,BURCHELL LARVAE,FISH LARVAE,MICROPARTICULATE DIETS,GROWTH,ARTIFICIAL DIETS,INGESTION,CONSUMPTION},
  language     = {eng},
  number       = {2},
  pages        = {119--134},
  title        = {Laboratory investigation of daily food intake and gut evacuation in larvae of African catfish Clarias gariepinus under different feeding conditions},
  url          = {http://dx.doi.org/10.1007/s10499-008-9230-6},
  volume       = {18},
  year         = {2010},
}

Altmetric
View in Altmetric
Web of Science
Times cited: