摘要
在自然光照、持续光照和持续黑暗3种光照条件下,研究了孵化后第5、8和12日龄的叉尾斗鱼仔鱼的摄食节律。结果表明:自然光照下,3个日龄的叉尾斗鱼仔鱼在午后12:00—16:00表现出明显的摄食高峰,而持续光照组与持续黑暗组未表现出明显的摄食峰谷。持续光照下,叉尾斗鱼仔鱼的昼夜摄食活动均很活跃,全日各时段平均摄食量显著增加,尤其是夜晚20:00—翌日4:00各时段平均摄食量极显著高于同一时段自然光照组。而在持续黑暗下,与自然光照相比全日各时段平均摄食量明显减少,尤其是白天8:00—16:00各时段的平均摄食量极显著降低。叉尾斗鱼仔鱼属于典型的白天摄食类型,其摄食节律与光照条件密切相关。
This paper studied the feeding rhythms of 5-, 8-, and 12-day old paradise fish （Macropodus opercularis） larvae under natural illumination, successive illumination, and successive dark. Under natural illumination, all the test larvae performed a typical daytime feeding rhythm, and fed actively during 12：00-16：00. However, under successive illumination and successive dark, the larvae did not show any identifiable feeding rhythm. Under successive illumination, the larvae fed actively all the day, and their feeding amount during 20：00-next 4：00 was significantly greater than that of the larvae under natural illumination. Conversely, the larvae under successive dark had＇a lower feeding intensity, particularly during 8：00-16：00, compared with the larvae under natural illumination. In conclusion, M. opercularis larvae performed a typical daytime feeding rhythm, and light condition greatly affected their feeding activity during their early life stages.
出处
《生态学杂志》
CAS
CSCD
北大核心
2010年第6期1161-1166,共6页
Chinese Journal of Ecology
基金
国家自然科学基金项目(30970555)
国家科技重大专项资助项目(2009ZX07211-009)
关键词
叉尾斗鱼
摄食量
光照条件
摄食节律
仔鱼期
Macropodus opercularis
feeding amount
light condition
feeding rhythm
larval stage.
