摘要
南方鲇仔鱼耳石在孵化出膜 2 4h内出现第一条日轮 ,此后每天增加一轮。日轮由两条纤细轮组成 ,其形成与光照无密切关系 ,南方鲇耳石上存在孵化轮。耳石日轮轮纹数、日轮直径与日龄及体长呈直线相关 :S=1.0 2 2 4D - 0 .5 171 (r=0 .993 6,P <0 .0 0 1) ;R =0 .0 2 86+ 0 .0 179D (r=0 .993 6,P <0 .0 0 1) ;L =5 .765 5 + 4 9.6642R (r=0 .995 3 ,P <0 .0 0 1)。
The first increment was formed in the otolith of Silurus soldatovi meridionalis in 0~24 hours after hatching, and one more increment formed each day ever since. The growth increment was found to consist of two slim rings, whose formation was not related to sunlight. A hatching cheek ring was observed in the otolith. The number and diameter of the daily increments in the otolith were in a linear correlation with age in days and body length of the fish.
出处
《西南农业大学学报(自然科学版)》
CSCD
北大核心
2001年第4期340-342,共3页
Journal of Southwest Agricultural University
关键词
南方鲇
仔幼鱼
耳石
日轮
S. soldatovi meridionalis Chen
larvae and juvenile
otolith
daily growth increment