| 摘要: |
| 为掌握舟山渔场及周边水域小黄鱼（Larimichthys polyactis）的繁殖特性，文章根据2020年和2021年3—5月在舟山渔场及邻近海域进行的拖网和流刺网渔获样品，分析了小黄鱼繁殖群体特征，及其繁殖力与生长指标的关系，并对繁殖力变化做了比较分析。结果表明：2020—2021年小黄鱼群体体长范围为107~200 mm，优势体长组为130~170 mm，平均体长143.98±16.78 mm；体重范围为18.4~108.3 g，优势体重组为30~70 g，平均体重46.78±16.54 g；绝对繁殖力7 944~31 077粒，平均15 545±6 019粒；体长相对繁殖力范围为53~182粒/mm，平均为98±31.29粒/mm；体重相对繁殖力范围为126~433粒/g，平均为258±60.91粒/g；卵径范围为0.41~2.77 mm，平均为1.01±0.36 mm。研究表明，绝对繁殖力与体长呈幂函数相关，与体重和纯重呈线性相关。 |
| 关键词: 小黄鱼；繁殖力；生长指标 渔业资源 舟山渔场 |
| DOI：10.20016/j.cnki.hykfygl.20220609.011 |
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| 基金项目:国家重点研发计划“海洋牧场聚鱼增殖模式集成创新示范”(2020YFD0900804);国家重点研发计划“近海岛礁水域渔业生境修复与资源养护技术”（2019YFD0901204); 浙江省重点研发计划“典型岛礁海域生态容量评估及生态修复关键技术研究与应用”(2019C02056); 舟山市科技计划(2019C33143) |
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| Reproductive Status of Larimichthys polyactis in Zhoushan Fishing Ground and Adjacent Waters from 2020 to 2021 |
| WANG Yali,HU Cuilin,XU Kaida,ZHOU Yongdong,JIANG Rijin,LI Zhenhua,LI Xiafang |
| Marine and Fishery Institute of Zhejiang Ocean University;Zhejiang Marine Fisheries Research Institute,Ministry of Agriculture and Rural Affairs Scientific Observation and Experimental Station of Fishery Resources of Key Fishing Grounds,Zhejiang Province Key Laboratory of Sustainable Utilization of Technology Research for Fisheries Resources |
| Abstract: |
| In order to understand the reproductive characteristics of Larimichthys polyactis in Zhoushan fishing ground and surrounding waters,according to the trawl and barbed wire catch samples in Zhoushan fishing ground and adjacent waters from March to May in 2020 and 2021,the reproductive population characteristics of Larimichthys polyactis and the relationship between reproductive capacity and growth indicators were analyzed,and the changes in reproductive capacity were compared and analyzed.The results showed that the body length of small yellow croaker population was 107~200 mm from 2020 to 2021,and the dominant body length group was 130~170 mm,with an average body length of 143.98±16.78 mm.The body weight ranged from 18.4g to 108.3g,and the dominant body weight ranged from 30g to 70 g,with an average body weight of 46.78±16.54 g.The absolute fecundity ranged from 7 944 to 31 077,with an average of 15 545±6 019.The relative fecundity of body length ranged from 53 to 182 grain/mm,with an average of 98±31.29 grain/mm.The relative fecundity of body weight ranged from 126 to 433 grain/g,with an average of 258±60.91 grain/g.The egg diameter ranged from 0.41 mm to 2.77 mm,with an average of 1.01±0.36 mm.Studies have shown that absolute fecundity has a power function correlation with body length,and a linear correlation with body weight and pure body weight. |
| Key words: Larimichthys polyactis,Reproductive,Growth index,Fishery resources,Zhoushan fishing ground |
