碩士 / 國立海洋大學 / 水產養殖學系 / 85 / Two experiments were conducted to evaluate the effects of
different dietary energy sources(protein, lipid and
carbohydrate) on the growth of European eel (Anguilla anguilla)
in an intensive culture system. Experiment I was designed to
investigate the effect of dietary energy and lipid levels on the
growth of juvenile European eel. Seven isonitrogenous diets(C.
P.45%) containing two energy levels(L－309 and H－366 Kcal/100g
diet) and lipid levels(0, 5, 10, 15 and 20%)were formulated.
After 3 weeks of conditioning with commercial eel feed, 2.4g
eels were distributed to 60×30×45 cm3 aquaria, each holding
50 eels. Experiment I was carried out with three replicates for
each dietary treatment with a duration of 9 weeks. The weight
gain was high for eels fed diets L5, H10 and H15, intermediate
for those fed diets L0, L10 and H20, and low for those fed diet
L15. Eels fed the diet L5 had higher feed conversion rate (FCR)
than those fed diet L15. The highest survival rate (95%) was
observed in those eels fed diet H20. The whole body lipid
content of eels was significantly increased by increasing
dietary energy and lipid levels. Experiment II was conducted to
evaluate the influence of dietary protein and carbohydrate
levels on the growth of juvenile European eel. Six isoenergetic
diets(365 kcal/100g diet) containing two crude protein levels
(30 and 40%) and three carbohydrate levels(20, 30 and 40%) were
fed to 0.94g fingerling eels. The results indicated that weight
gain and feed efficiency (FE) were high for fish fed diets P40/
C30, P40/C40 and P30/C40. Survival was higher for fish fed diet
P40/C30 than those fed diets P30/C20, P30/C30 and P30/C40. The
activities of pepsin, alkaline protease and amylase in digestive
tract of eels were significantly affected by dietary protein and
carbohydrate levels. O/N ratio tended to increase with the
increase of dietary carbohydrate level. No marked differences
were observed on the whole body lipid content of fish fed
isocaloric diets. In conclusion, carbohydrate was a better
substitute as energy source for European eel. They can
efficiently utilize diet containing up to 40% carbohydrate.
| Identifer | oai:union.ndltd.org:TW/085NTOU0086013 |
| Date | January 1997 |
| Creators | Ho, Tsung-Cheich, 何宗傑 |
| Contributors | Shyn-Shin Sheen, 沈士新 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 75 |
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