| 四川裂腹鱼摄食习性与资源保护 |
| Feeding Habits and Resources Protection of Schizothorax kozlovi |
| 投稿时间：2010-10-01 修订日期：2010-11-14 |
| DOI： |
| 中文关键词:四川裂腹鱼 食性 季节变化 乌江 |
| 英文关键词:Schizothorax kozlovi feeding habits seasonal change Wujiang River |
| 基金项目:国家自然科学基金项目(30760189,30960297);贵州省科学技术基金项目[黔科合J字(2007)2062];贵州省省长基金项目[黔省专合字(2005)347] |
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| 中文摘要: |
| 对采自乌江上游的190尾四川裂腹鱼(Schizothorax kozlovi)进行了食性分析。结果表明,天然水域中四川裂腹鱼以水生昆虫、藻类、水生植物、环节动物、软体动物和原生动物等为食,其营养级为1.72级,属于底栖杂食性鱼类。主要饵料为水生昆虫,出现频率和重量比分别为76.30%和53.22%;其次为藻类,出现频率和重量比分别为94.90%和31.09%;不同体长的四川裂腹鱼主要饵料和次要饵料基本相同,随着体长的增长,其食物种类并未出现简单化。虽然食物类群的季节变化明显,但四川裂腹鱼没有出现停止摄食的时期,摄食率为100%,充塞度以2级最多。随着性腺的不断成熟,其充塞指数逐渐降低,其中Ⅰ期最高,为2.53%;Ⅴ期最低,为0.85%。 |
| 英文摘要: |
| This paper reported the feeding habits of Schizothorax kozlovi in Wujiang River. 190 fish were collected then their feeding habits was analyed. The results showed that Schizothorax kozlovi is omnivory fish，feeding on aquatic insects，algae，mollusc，annelids，protozoa，and aquatic plants，etc. Aquatic insects are the primary food，and the occurrence frequency and percentage of weight are 76.30% and 53.22% respectively; algae is the lesser feed，the occurrence frequency and percentage of weight respectively 94. 90% and 31.09 %; the primary and lesser feed are similar among individuals with different body length. With the increasing body length，the feed types of Schizothorax kozlovi do not appear limited variety. The composition of Schizothorax kozlovi feed displays seasonal variation，but non-feeding period is not observed at different times of the year; the feeding efficiency is 100% and the maximal fullness of stomach and intestine is two; the maximum of fullness of stomach and intestine appears in the stage I of sexual maturity，up to 2. 53 %.The minimum appears in the stage V, just only 0. 85 %.The lullness of stomach and intestine displays decrease with the development of gonad in Schizothorax kozlovi. |
| 张晓杰,代应贵.2011.四川裂腹鱼摄食习性与资源保护[J].水生态学杂志,32(2):110-114. |
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