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时间:2019-10-08
《叶尔羌高原鳅的年龄_生长与繁殖特征》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、动物学杂志ChineseJournalofZoology2010,45(5):29~38叶尔羌高原鳅的年龄、生长与繁殖特征*曾霖唐文乔(上海海洋大学鱼类研究室种质资源发掘与利用教育部重点实验室上海201306)摘要:分析了2008年5月采自新疆克孜河264尾叶尔羌高原鳅(Triplophysayarkandensis)的年龄结构、生长特征和繁殖力。结果显示,种群年龄由2~11龄组成,其中2~4龄组个体占94.49%。平均体长和体重雌性为(9.39±2.10)cm和(16.55±15.85)g,雄性为(9.17±2.27)cm和(15.38±15.20)g,两者在2
2、.9889雌雄群体间差异均不显著(P>0.05)。体长和体重关系式为W=0.0140L(r=0.9754),W=♀+♂♀2.88953.08310.0167L(r=0.9809),W=0.0117L(r=0.9757)。生长指标和年增重均以4龄组最大,分♂别为1.86和18.79g/年。雌雄性比为0.7∶1.0。2龄性即成熟。最小成熟体长和体重雌性为6.2cm和4.46g,雄性为4.6cm和1.67g。绝对怀卵量为6136~405555(平均28716±42698)粒,相对怀卵量为672~6134(平均2310±1427)粒/g。卵径呈单峰型分布,推测为不分批产卵
3、类型。依据同年8月采集的19尾幼体日龄推算,其繁殖期为5月下旬至6月下旬。关键词:叶尔羌高原鳅;年龄结构;生长特征;繁殖力;克孜河;新疆;中国中图分类号:Q958文献标识码:A文章编号:0250-3263(2010)05-29-10Age,BodyGrowthandReproductiveCharacteristicsofTriplophysayarkandensis*ZENGLinTANGWen-Qiao(LaboratoryofFishes,ShanghaiOceanUniversity,KeyLaboratoryofExplorationandUtiliza
4、tionofAquaticGeneticResources,MinistryofEducation,Shanghai201306,China)Abstract:Westudiedtheagestructure,bodygrowthandfecundityofTriplophysayarkandensisbasedon264samplescollectedfromKeziRiverinsouthernXinjiangUygurAutonomousRegioninMay2008.Theageofsamplesrangedfrom2to11yearsold,mostin
5、dividuals(94.49%)wereaged2to4yearsold.Averagebodylengthandbodyweightoffemalewere9.39±2.10cmand16.55±15.85g,andmalewere9.17±2.27cminlengthand15.38±15.20ginweight,nosignificantdifferencesbetweenfemaleandmales(P>0.05).2.98892.8895RelationshipsofbodylengthandbodyweightwereW=0.0140L(r=0.97
6、54),W=0.0167L♀+♂♀3.0831(r=0.9809),W=0.0117L(r=0.9757).Growthindexandannualweightincrementappearedpeak♂atfouryearsold,1.86and18.79gperyear,respectively.Sexratiowas0.7∶1.0(♀∶♂),andindividualmaturedintwoyearsold.Theminimummaturebodylengthandweightoffemalewere6.2cmand4.46g,meanwhilethemal
7、ewere4.6cmand1.67g.Absolutefecundityrangedfrom6136to405555andthemeanvaluewas28716±42698,therelativefecunditywerefrom672to6134(eggspergram)andthemeanvaluewas2310±1427.Thedistributionofeggdiametersshowedasinglepeak,whichmightindicateone-time基金项目上海市教育委员会E-研究院项目(No.E03009),上海市重点学科建设项目(No.
8、S3070
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