文章摘要
个体差异对西沙群岛海域鸢乌贼角质颚外部形态变化的影响
Difference of individual size on beak morphology of Sthenoteuthisoualaniensisin the Xisha Islands of South China Sea
投稿时间:2018-12-10  修订日期:2019-04-17
DOI:
中文关键词: 鸢乌贼  个体差异  角质颚  外形变化  中国南海西沙群岛海域
英文关键词: Sthenoteuthisoualaniensis  difference of individual size  beak  morphologic changes  Xisha Island waters of South China Sea
基金项目:
作者单位E-mail
陈子越 上海海洋大学海洋科学学院 281466188@qq.com 
陆化杰 上海海洋大学海洋科学学院 hjlu@shou.edu.cn 
童玉和 海南省海洋与渔业科学研究院  
刘维 海南省海洋与渔业科学研究院  
张旭 上海海洋大学海洋科学学院  
陈新军 上海海洋大学海洋科学学院  
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中文摘要:
      角质颚结构稳定、信息量大,是研究头足类渔业生物学的重要材料。根据2017年5-8月我国灯光罩网渔船在中国南海西沙群岛海域采集的860尾鸢乌贼(Sthenoteuthis oualaniensis)样本,研究了个体差异对鸢乌贼角质颚外部形态变化的影响。结果表明,上头盖长(UHL)、上脊突长(UCL)、上喙宽(URW)、上侧壁长(ULWL)、下头盖长(LHL)、下脊突长(LCL)、下喙长(LRL)和下侧壁长(LLWL)可以作为角质颚的特征因子描述鸢乌贼角质颚的外形变化特性。方差分析(ANOVA)和最小显著性差异法(LSD)结果表明角质颚主要外形特征因子在不同性别、不同胴长组和不同性成熟度间均存在显著性差异,但主要外形特征因子与脊突长(CL)的比值基本稳定。本研究表明胴长121~150mm和性腺成熟度Ⅲ期可能是角质颚外形生长的拐点,在个体生长过程中角质颚各区的比例基本稳定。
英文摘要:
      Beak is an important hard tissues of Cephalopoda which is usually used in the study of fisheries biology such as population identification, growth and stock assessment and so on. Based on the 860 samples of Sthenoteuthis oualaniensis collected by light falling-net fishery during May to August in the year of 2017 in the Xisha Islands waters of the South China Sea, the morphologic growth of beak impacted by sex maturity and individual size was analyzed by the analysis of variance. The result of principal component analysis of twelve morphologic indices indicated that that the upper hood length (UHL), upper crest length (UCL), upper rostrum width (URW), upper lateral wall length (ULWL), lower hood length (LHL), lower crest length (LCL) ,lower rostrum length (LRL) and the lower lateral wall length (LLWL) could be used to describe the length growth features of beak, and the HL/CL, URW/UCL, LRL/LCL, LWL/CL and WL/CL could be used as the indicators of entire growth of beak. The analysis of variance (AVOVA) and the least-significant difference (LSD) indicated that there were significant differences in the morphologic growth between sexes, gonad maturity and different mantle length, however the value of HL/CL, URW/UCL, LRL/LCL, LWL/CL and WL/CL was nearly stable with the change
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