Some observations of the effects of body weight, temperature, meal size and quality on gastric emptying time in the turbot, Scophthalmus maximus (L.) using radiography
The gastric emptying time (G.E.T.) in turbot was investigated using X‐radiography and was found to decrease with temperature. Small fish processed a given ration, expressed as percent body weight, faster than large fish (G.E.T. was found to be proportional to (fish weight) 0.364 ). Large meals in a...
| Published in: | Journal of Fish Biology |
|---|---|
| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1979
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1979.tb03514.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1979.tb03514.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1979.tb03514.x |
| Summary: | The gastric emptying time (G.E.T.) in turbot was investigated using X‐radiography and was found to decrease with temperature. Small fish processed a given ration, expressed as percent body weight, faster than large fish (G.E.T. was found to be proportional to (fish weight) 0.364 ). Large meals in a given fish were processed at a faster rate than small meals. Gastric emptying rate (G.E.R.) was found to be proportional to (meal size g) 0.613 at 8° C and (meal size g) 0.788 at 19° C. These exponents are in agreement with a recently proposed model relating G.E.T. and G.E.R. to meal size (Fänge & Grove, 1978). Large fish emptied a meal of given absolute size from the stomach at a faster rate (g h −1 ) than small fish. Experimental meals diluted with kaolin were evacuated in significantly less time than a control diet, suggesting that turbot may adjust feeding rates when food quality varies. |
|---|