碩士 / 國立臺灣大學 / 漁業科學研究所 / 94 / Red striped snapper (Lutjanus erythropterus) , the skin of this fish is bright red and with tasty flesh, and its value in the market is usually high. It is most likely developing as the main kind of cultured fish using the seawater net cage culture in Taiwan. One of the most expensive ingredients in feed production is protein ; however, fish meal is the major protein source in feeds for intensive fish farming. Different protein sources are used for commercial feed production to reduce costs at present. A study was designed to evaluate the level of substitution of fish meal in diets for red striped snapper when a mixture of feedstuffs of plant protein and squid meal was used. This study was divided into two trails.
In the first trail, the control diet (FM60) contained 60% fish meal and seven other experimental diets (SL, SR, SC, SLR, SLC, SRC, SLRC) in which protein from fish meal was substituted by protein from lupin (L), rapeseed (R), corn protein (C) and squid meal (S). Red striped snapper (initial weight about 3.5g) were fed these diets for 6 weeks and growth parameters were recorded. The final body weight, weight gain and feed efficiency ratio of the group SLRC was the lowest than other groups. Then between the group SLC and control diet, there were no marked differences in the growth performance. So the content of fish meal in diet could decrease from 60% to 30%.
In the second trail, we attempted to reduce the contents of fish meal in diet. Owing to the rapeseed meal contained high level of phytic acid that could involve the bioavailability of protein, it was necessary to reduce its content in diet. The content of rapeseed meal was reduced from 10% to 5% at experiment diet. The trail was divided into six groups (FM60, LC, SLC, FM25, SLRC, FM20). After 6 weeks of feeding, the growth performance of the group FM20 had no significantly differences with the control diet. Therefore in our study, about 40% of fish meal could be replaced with plant ingredients and squid meal.
| Identifer | oai:union.ndltd.org:TW/094NTU05451016 |
| Date | January 2006 |
| Creators | Len-Chieh Wu, 吳仁傑 |
| Contributors | 廖文亮 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 61 |
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