摘要
根据2007-2008年我国鱿钓船在西南大西洋海域采集的560对阿根廷滑柔鱼耳石样本,以耳石总长(TSL)、最大宽度(MW)、背区长(DDL)、背侧区长(DLL)、侧区长(LDL)、吻侧区长(RLL)、吻宽(RW)、吻区长(RL)、翼区长(WL)和翼区宽(WW)作为耳石各区生长指标,以耳石MW与TSL之比、RW与RL之比、WW与WL之比作为表征耳石外形变化的指标,利用方差分析(ANOVA)和最小显著差多重比较法(LSD)研究性别、性腺成熟度和不同胴长等个体差异对耳石各区生长和外形变化的影响。结果表明,不同性别间TSL、MW、DLL、DDL、RLL、RL、WL和WW的变化存在显著性差异(P<0.05);雌、雄样本内不同性腺成熟度、不同胴长范围间TSL、MW、DLL、LDL、WL和WW的变化均存在显著性差异(P<0.05);MW/TSL、RW/RL和WW/WL的变化在不同性别、不同性腺成熟度和不同胴长范围间不存在显著性差异。研究认为,胴长组301～350 mm可能是耳石各区生长的拐点区。
Statolith is an important hard tissue in cephalopod,which may better reflect the ecological information.Illex argentinus located in the southwest Atlantic is one of important economic cephalopods in the world,which is also one of the important fishing targets for Chinese squid jigging fleets.Mastering the basic biological characteristics and revealing the life cycle process of Illex argentinus is the base for scientificalty developing and exploiting Illex argentinus.According to the samples of Illex argentinus totaled 560 in number collected by Chinese squid jigging vessels from 2007 to 2008 in Southwest Atlantic Ocean,the total statolith length（TSL）,maximum width（MW）,dorsal dome length（DDL）,ventral dorsal dome length（DLL）,lateral dome length（LDL）,rostrum lateral dome length（RLL）,rostrum width（RW）,rostrum length（RL）,wing length（WL）and wing width（WW）are considered as the indicator of dome growth,and the ratios of MW to TSL,RW to RL and WW to WL are considered as the indicator of changes in statolith shape.The dome growth and statolith shape changes effected by sex,gonad maturity and individual size are analyzed by the analysis of variance（ANOVA）and Least-significant difference（LSD）.The results indicated that the changes TSL,MW,DLL,DDL,RLL,RL,WL and WW between different sexes were significant（P〈0.05）.For both female and male samples,the changes of TSL,MW,DLL,LDL,WL and WW between different gonad maturity and different mantle length ranges were also significant（P〈0.05）.However,the ratios of MW to TSL,RW to RL and WW to WL changes in different sexes,different gonad maturity and different mantle length ranges show no significant differences.The results indicated that the mantle length group（301-350 mm）may be the turning point of the growth of statolith.
出处
《水产学报》
CAS
CSCD
北大核心
2011年第2期247-254,共8页
Journal of Fisheries of China
基金
国家"八六三"高技术研究发展计划(2007AA092202)
国家自然科学基金项目(NSFC40876090)
曙光跟踪计划(08GG14)
上海市捕捞学重点学科资助(S30702)
关键词
阿根廷滑柔鱼
耳石形态
性别
性腺成熟度
个体大小
西南大西洋
Illex argentinus
morphology characteristic of statolith
sex
gonad maturity
size
the southwest Atlantic Ocean
