吕四渔场黄鲫耳石形态及日龄分析

Sagittal otolith morphology and daily increment analysis of Setipinna taty from Lüsi Fishing Ground

摘要:

根据2009年5月在吕四渔场单桩张网采集的231尾黄鲫幼鱼，对其耳石形态和储存信息进行分析。结果显示，耳石全长范围为1.88～4.91 mm，平均3.75 mm；耳石重量范围为0.8～13.7 mg，平均6.4 mg。黄鲫耳石全长和叉长拟合生长方程为L_OA=2.6322 ln(L)-8.2612。耳石全长与耳石重量关系式为W_O=0.196×L_OA^-2.6186。黄鲫年龄范围为60～258 d，优势年龄组为90～150 d，占总体的69.5%；叉长与年龄拟合线性生长方程为L=0.2034×A+69.12。孵化日期为1月至3月，主要集中在2月份，占总体的83.6%。

Abstract:

231 Setipinna taty individuals were sampled by singlestake stownet fishery from Lüsi Fishing Ground in the south of the Yellow Sea to analyze sagittal otolith morphology and information contained. The results indicated that the otolith length ranged from 1.88 to 4.91 mm with mean of 3.75 mm and otolith weight ranged from 0.8 to 13.7 mg with mean of 6.4mg. Observation of the otoliths of Setipinna taty showed that the growth equation was fitted by the all otolith length ( L_OA, mm) and fork length as follows, L_OA=2.6322 ln(L)-8.2612. The relationship between L_OA and otolith weight (W_O, mg) was W_O=0.196×L_OA^-2.6186. It is induced that the age range of the Setipinna taty individuals measured was 60-258 days, in which 90~150 days dominated the age range, accounting for 69.5%. The linear growth equation between fork length and age (day) was L=0.2034×A+69.12. The estimated hatch dates of Setipinna taty in the south of the Yellow Sea were distributed between January and March and 83.6% concentrated in February.