碩士 / 國立臺灣大學 / 海洋研究所 / 99 / Silver sea bream (Rhabdosargus sarba) is one of the mariculture sea breams in Taiwan, which grows fast and has high disease resistance. Fishmeal is traditionally the main protein source in mariculture feeds, but a slump in fishmeal production and an increasing demand for formula feeds for mariculture has resulted in the rising costs of fishmeal. It is necessary to replace fishmeal in feeds by using other protein sources. This study was divided into two trials.
In the first trial, the control diet contained 60% fishmeal as protein source in the diet and other five experimental diets contained 20-25% soybean meal, 15-20% corn protein, 10% krill meal and 1-5% blood meal and feather meal each. After 42 days of feeding, the experimental group fed diet contained 25% soybean meal, 20% corn protein, 10% krill meal and 1% blood meal and feather meal each had no significant differences in weight gain and feed efficiency rate with the control group. Therefore, the content of fishmeal in diet for silver sea bream could be lowered from 60% to 15%.
In the second trial, we used the 60% fishmeal diet in trial 1 as the control diet and test the 15% fishmeal diet in trial 1 once more to check its effect on growth performance of fish. Furthermore, we reduced the content of fishmeal in diet from 15% to 0% by supplying blood meal, feather meal, fish oil and Ca(H2PO4)2. After 42 days of feeding, the experimental group fed non-fishmeal diet showed no significant differences in weight gain and feed efficiency rate with the control group. Therefore, in this study it is suggested that the content of fishmeal in diet for silver sea bream can be reduced to zero with no decrease in growth.
| Identifer | oai:union.ndltd.org:TW/099NTU05279019 |
| Date | January 2011 |
| Creators | Shao-Hsien Wei, 魏劭先 |
| Contributors | 孫志陸 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 63 |
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