关键词：
杭州湾北部;棘头梅童鱼;繁殖群体;生物学特征
摘 要：
根据2017年5—8月杭州湾北部定置张网渔业资源基础数据,对杭州湾北部棘头梅童鱼繁殖群体的生物学特征进行初步分析。结果表明:杭州湾北部棘头梅童鱼繁殖群体体长分布范围为87~150 mm,平均体长(116. 4±9. 9) mm,体质量分布范围为12. 6~53. 3 g,平均体质量(27. 4±7. 2) g,平均体长和体质量均呈增长趋势,独立样本T检验表明,5—8月棘头梅童鱼的平均体长和平均体质量分别具有显著性差异。雌雄性比为2. 53∶1,雌性个体数明显高于雄性个体数,经卡方检验,雌雄性比不符合1∶1。雌性个体性腺发育以Ⅳ、Ⅴ期为主,数量占比达78. 2%,雄性个体性腺发育以Ⅲ、Ⅳ期为主,数量占比高达97. 9%,性腺发育在Ⅳ期及以上的性成熟个体体长分布范围主要集中于100~130 mm。繁殖群体摄食等级以0和1级为主,数量占比达72. 8%,空胃率为39. 8%。研究表明,杭州湾北部为棘头梅童鱼的索饵场,棘头梅童鱼小型化程度严重,建议加强针对繁殖群体的保护。
译 名：
Preliminary analysis of biological characteristics of reproductive stocks of Collichthys lucidus in Northern Hangzhou Bay
作 者：
WANG Miao;XU Kaida;LIANG Jun;Marine Fishery Research Institute of Zhejiang Province;Shanghai Fisheries Research Institute,Fishery Inspection Monitoring Center;Key Laboratory of Sustainable Utilization of Technology Research for Fisheries Resources of Zhejiang Province;Scientific Observing and Experimental Station of Fishery Resources for Key Fishing Grounds,MOA;
单 位：
WANG Miao%XU Kaida%LIANG Jun%Marine Fishery Research Institute of Zhejiang Province%Shanghai Fisheries Research Institute,Fishery Inspection Monitoring Center%Key Laboratory of Sustainable Utilization of Technology Research for Fisheries Resources of Zhejiang Province%Scientific Observing and Experimental Station of Fishery Resources for Key Fishing Grounds,MOA
关键词：
Northern Hangzhou Bay;;Collichthys lucidus;;reproductive stocks;;biological characteristics
摘 要：
Based on the basic data of fishery resources by set-nets in Northern Hangzhou Bay from May to August,2017,a preliminary analysis of biological characteristics of reproductive stocks of Collichthys lucidus was carried out. The results indicated that body length of reproductive stocks of Collichthys lucidus ranged from 87 to 150 mm,and average body length was( 116. 4 ± 9. 9) mm,while body weight of reproductive stocks of Collichthys lucidus ranged from 12. 6 to 53. 3 g,and average body weight was( 27. 4 ± 7. 2) g.There was an increasing trend of average body length and body weight,and independent T-test displayed a significant difference in average body length and body weight between May and August. Sex ratio( female:male) of Collichthys lucidus was 2. 53 ∶ 1,the number of female was significantly higher than the number of male. According to chi-square test,sex ratio was not 1 ∶ 1. The gonad maturity stages of female was mainly from Ⅳ to Ⅴ,accounting for 78. 2%,and the gonad maturity stages of male was mainly from Ⅲ to Ⅳ,accounting for 97. 9%,and body length of individuals whose gonad maturity stages had achieved Ⅳ or above mainly ranged from 100 to 130 mm. The feeding levels of reproductive stocks of Collichthys lucidus was mainly0 and 1,accounting for 72. 8%,and the empty stomach ratio was 39. 8%. The research showed that Northern Hangzhou Bay was the feeding ground of Collichthys lucidus. Collichthys lucidus has become smaller,and management for protection of reproductive stocks of Collichthys lucidus in Northern Hangzhou Bay should be enhanced.
