∗doi:10.3969/j.issn.2095-1736.2023.04.062海州湾海洋牧场区两种石首鱼科鱼类耳石形态特征与生长特性张硕1,2,张潇1,高世科1,孙文1(1.上海海洋大学海洋科学学院,上海201306;2.上海海洋大学大洋渔业资源可持续开发省部共建教育部重点实验室,上海201306)摘要研究棘头梅童鱼(Collichthylucidus)和小黄鱼(Larimichthyspolyactis)耳石的形态特征及主要参数,选用左矢耳石为研究对象,分别采用直线、对数、幂函数和指数函数拟合矢耳石各参数与鱼体生长关系式。结果表明,两种鱼类矢耳石的长、短直径均随体长、体重的增大而增大,而长直径与短直径的比值变化不大。棘头梅童鱼矢耳石的长、短直径与体长之间,以及长、短直径与体重之间均呈显著的幂函数相关关系(P<0.05);小黄鱼矢耳石的长、短直径与体长、体重之间均呈显著的线性函数相关关系(P<0.05)。两种鱼类的矢耳石的生长特性区别明显。棘头梅童鱼矢耳石短直径与长直径比值稳定于0.75,而小黄鱼则稳定于0.6。棘头梅童鱼矢耳石的长短直径与耳石重之间呈显著的幂函数相关关系(P<0.05),而小黄鱼的则呈线性函数相关。随机森林结果显示,两种鱼类的耳石形态参数对体长、体重的贡献率差异不大(P>0.05)。关键词棘头梅童;小黄鱼;耳石形态;随机森林;海州湾中图分类号Q959.4;S917.4文献标识码A文章编号2095-1736(2023)04-0062-08MorphologyandgrowthcharacteristicsofotolithsoftwospeciesofSciaenidaeinthemarineranchingareaofHaizhouBayZHANGShuo1,2,ZHANGXiao1,GAOShike1,SUNWen11.CollegeofMarineSciencesShanghaiOceanUniversityShanghai201306China2.KeyLaboratoryofSustainableExploitationofOceanicFisheriesResourcesMinistryofEducationShanghaiOceanUniversityShanghai201306ChinaAbstractThemorphologicalparametersgrowthcharacteristicsofotolithsofCollichthyslucidusandLarimichthyspolyactisandtheirrelationshipwithfishgrowthwerestudied.Theleftsagittalotolithwasselectedastheresearchobjectandthegrowthrelationofeachparameterofsagittalotolithwasfittedbylinearlogarithmicpowerandexponentialfunctions.Theresultsshowedthelongandshortdiametersofthesagittalotolithsoftwospeciesincreasedwiththeincreaseofbodylengthandweightbuttheratioofthelongdiametertotheshortdiameterwasbasicallystable.Thereweresignificantpowerfunctioncorrelationsnotonlybetweenthelongandshortdiame-ters...
