论文部分内容阅读
研究了棘头梅童鱼(Collichthys lucidus)耳石的形态参数、生长特性及其与鱼体生长的关系,选用左矢耳石为研究对象,用直线、对数、多项式、幂函数和指数函数拟合矢耳石各参数的生长关系式,依据耳石日轮鉴定了日龄。结果表明,体长范围为29.8～104.0 mm的棘头梅童鱼矢耳石的长直径随鱼体生长而增大,但短直径与长直径的比值以及长直径方向上的短半径与长半径的比值则基本稳定。矢耳石的长、宽和重之间,以及长半径和短半径之间均呈显著的幂函数相关关系;矢耳石生长与鱼体生长的关系中,矢耳石长、宽、厚、重与长半径和体长、体重之间的关系,除了体长与耳石厚的关系为显著的二次多项式外,全部呈显著的幂函数相关关系。
The morphological parameters and growth characteristics of Collierythys lucidus otoliths and their relationship with the growth of the fish were studied. The left otolith was chosen as the research object. The linear, logarithmic, polynomial, power and exponential functions Fit otolith parameters of the growth relationship, based on otolith day identified age. The results showed that the length of the otolith of Sagittaria ochrocephala rose from 29.8 to 104.0 mm in diameter with the growth of the fish, but the ratio of the short diameter to the long diameter and the short radius and long radius in the long diameter The ratio is basically stable. The length, width and weight of otolith, as well as between the long radius and short radius showed a significant power function correlation; otolith growth and the relationship between fish growth, the length of the otolith, width, thickness, The relationship between weight and long radius and body length and body weight were significant power function except for the relationship between body length and otolith thickness as a significant quadratic polynomial.