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短吻红舌鳎(Cynoglossus joyneri)是山东近海海域鱼类群落的优势种，在该海域生态系统中占据重要地位。本研究基于2013—2020年海州湾渔业资源调查数据和2016—2017年莱州湾渔业资源调查数据，使用Bootstrap重抽样的电子体长频率分析法，估算了海州湾和莱州湾短吻红舌鳎群体的生长参数，并研究了生长参数在时间和空间上的异质性。研究表明，海州湾群体的体长均值和优势体长在2014—2019年呈波动变化，莱州湾群体的体长均值和优势体长小于海州湾群体。海州湾群体的极限体长Linf由2015年的234.1 mm降低至2019年的200.3 mm,生长参数K由2015年的0.33 a-1上升至2019年的0.45 a-1,其中2017—2018年生长参数的年际变化最大，群体呈小型化趋势。莱州湾群体的极限体长Linf为206.3 mm,小于海州湾群体，生长参数K为0.44 a-1,大于海州湾群体，生长参数呈一定的空间异质性。研究结果表明，渔业管理决策应充分考虑生长参数的异质性对渔业资源评估的影响。
Abstract：As one of dominant species, Cynoglossus joyneri played a key role in the ecosystem of coastal waters of Shandong Peninsula. We estimated the VBGF parameters for C. joyneri with bootstrapped electronic length frequency analysis(ELEFAN) using data collected from bottom-trawl surveys conducted during 2013—2020 in Haizhou Bay and 2016—2017 in Laizhou Bay, and evaluated the spatio-temporal heterogeneity of growth parameters. Our research revealed that there was high inter-annual variability in length-based estimates(the mean body length and dominant body length) of C. joyneri population in Haizhou Bay, which had a relatively larger length distribution than that in Laizhou Bay. In Haizhou Bay population, the asymptotic length Linf decreased from 234.1 mm to 200.3 mm and the growth coefficient K increased from 0.33 a-1 to 0.45 a-1 annually, with a large variation in 2017—2018, suggesting the diminishing fish size at maturity. Compared to the Haizhou Bay population, the Laizhou Bay population has a smaller asymptotic length Linf (206.3 mm) and a larger growth coefficient K(0.44 a-1), suggesting heterogeneity on the spatial dimension. Our results highlighted that the spatio-temporal heterogeneity of growth parameters should be considered in processes of stocks assessment and fishery management.
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基本信息:
DOI：10.16441/j.cnki.hdxb.20210408
中图分类号:S932.4
引用信息:
[1]赵天亚,刘逸文,王琨,等.海州湾和莱州湾短吻红舌鳎生长参数的异质性[J],2022,52(10):167-174.DOI:10.16441/j.cnki.hdxb.20210408.
基金信息:
国家重点研究发展计划项目(2018YFD0900904,2018YFD0900906)资助~~