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篇目详细内容 |
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【篇名】 |
Effects of prey density on the growth and survival of hybrid snakehead larvae |
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【刊名】 |
Frontiers of Agriculture in China |
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【刊名缩写】 |
Front. Agric. China |
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【ISSN】 |
1673-7334 |
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【EISSN】 |
1673-744X |
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【DOI】 |
10.1007/s11703-008-0020-8 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2008 |
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【卷期】 |
2
卷1期 |
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【页码】 |
110-114
页,共
5
页 |
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【作者】 |
LIU Wenkui;
FAN Qixue;
ZHU Bangke;
DU Haiming;
FENG Xigang;
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【关键词】 |
hybrid snakehead; larvae; growth; survival; prey density |
【摘要】 |
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The effects of prey density (0.1, 0.3, 1, 3 and 10 prey·mL-1) on the growth and survival of hybrid snakehead (Channa argus × C. maculate) larvae were investigated. The larvae were divided into three groups with different body lengths of 0.68 cm, 1.50 cm and 3.20 cm, respectively. The growth of the hybrid snakehead larvae in all three groups increased with prey density increasing from 0.1 to 1 prey·mL-1. The specific growth rate (SGR) was the highest when the prey density was 1 prey·mL-1. When prey density was higher than 1 prey·mL-1, SGR of larvae in Group I (the larvae of early development stage) decreased, while no significant change was observed in those of Group II and Group III. The survival rates of hybrid snakehead larvae in all three groups were high (91.11%–100%) and not significantly affected by the prey densities except in Group I with the highest prey density (10.0 prey·mL-1) which was significantly lower than the others. Body size was not sensitive to prey density. The optimum prey density was confirmed at 1 prey·mL-1 in all the treatments. |
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