印度洋西北海域鸢乌贼角质颚长度分析

Grey relationship analysis for the environmental factors affecting the Noctiluca scintillans density in Qinhuangdao coastal area

中文关键词: 角质颚  耳石  鸢乌贼  印度洋西北海域

英文关键词: Beak  Statolith  Sthenoeuthis oualaniensis  Waters of northwest Indian Ocean

中文摘要:

      根据2004~2005年我国鱿钓渔船对印度洋西北海域鸢乌贼资源调查期间采集的103个鸢乌贼角质颚和60枚耳石样本，分析了角质颚长度特征，并与鸢乌贼胴长、体重和日龄建立了关系。结果显示，角质颚长度与胴长呈极显著的线性相关，与体重呈极显著的指数相关；角质颚各部长度随着鸢乌贼日龄增加逐步增大，上、下颚头盖和脊突生长较快，喙部和翼部生长较慢；上颚头盖和脊突较下颚头盖和脊突生长快；上颚翼部呈幂函数生长，上、下颚其余各部均呈线性生长。

英文摘要:

      The beak length and its relationship with mantle length, body weight as well as age were studied based on 103 beaks and 60 statoliths specimen of the purleback flying squid Sthenoeuthis oualaniensis which were collected during jigging surveys in northwest Indian Ocean from October to December in 2004 and in April of 2005. The results indicated that the beak dimensions were best described by linear functions with mantle length but showed positive exponential correlation with body weight. With the squid ontogenetic growth, size of each part of the beak became larger. Hood and crest grew faster but rostrum and wing grew slower. Hood and crest of the upper beak grew faster than that of the lower beak. Dimensions of each part were best described by linear functions with age except for the wing of upper beak which fitted exponential function. The results provided basic data for the resources estimation of S.oualaniensis.