印度洋西北海域鸢乌贼耳石的形态特征分析  

Statolith morphology of the purpleback flying squid Sthenoeuthis oualaniensis in the northwest Indian Ocean

作　　者：刘必林[1] 陈新军[1] 钟俊生[2] 

机构地区：[1]上海海洋大学海洋科学学院 [2]上海海洋大学水产与生命学院,上海200090

出　　处：《上海水产大学学报》2008年第5期604-609,共6页Journal of Shanghai Fisheries University

基　　金：教育部新世纪优秀人才计划(NCET-06-0437);国家科技支撑计划(2006BAD09A05);上海市重点学科建设项目(T1101)

摘　　要：根据2004-2005年我国鱿钓船在印度洋西北海域鸢乌贼资源调查期间获得的114尾鸢乌贼(胴长为142～575mm)的耳石,对其形态特征进行观察与测量。观测表明,鸢乌贼耳石具有很大的翼区,背区则较小,其形态结构与一些其它科种类如黵乌贼科有明显差异。耳石总长TSL、最大宽度MW、侧区长LDL、背侧区长DLL、吻侧区长RLL和翼区长WL等6个主要形态参数值与胴长呈明显的幂函数关系(P<0.05)。随着胴长不断增加,耳石绝对尺寸逐渐增大,相对尺寸逐渐减小,背区、侧区、吻区、翼区的长度与耳石总长之比则基本保持不变,分别为42%、57%、49%和75%左右。The morphology and microstructure of statolith of the purple back flying squid Sthenoeuthis oualaniensis were studied for the 114 samples with 142 -575 mm mantle length （ML）, which were collected during jigging surveys in the northwest Indian Ocean from October to December 2004 and in April 2005. The study indicated that its statolith has the structure with great rostrum and small dorsal dome, and its morphological structure is obviously different compared with other family squids like Gonatus fabricii. Six most important featured parameters including total statolith length （TSL）, maximum width （MW）, lateral dome length（LDL）, ventral dorsal dome length（DLL）, rostrum lateral dome length （RLL） and wing length （WL） were best described by power functions with ML （ P 〈 0.05 ）. With the squid growing, the size of statolith gradually develops, while the ratio of each featured parameter to ML slowly decrease, and the ratio of FDL,LDL, FRL and WL to TSL almost remain the same level, corresponding to 42%, 57%, 49% and 75%.

关 键 词：鸢乌贼 耳石形态特征 主成分分析 印度洋西北海域 

分 类 号：S931[农业科学—渔业资源]