Effects of prey density on the growth and survival of hybrid snakehead larvae

• 来源期刊: 中国高等学校学术文摘·农学
• 关键词: hybrid snakehead larvae growth survival prey density
• 年，卷（期）: 2008,（1）
• 页码范围: 110-114
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11703-008-0020-8

摘要

The effects of prey density (0.1, 0.3, 1, 3 and 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 snake-head larvae in all three groups increased with prey growth rate (SGR) was the highest when the prey density 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 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.