文献类型：期刊文献

英文题名：Biological characteristics and spatial - Temporal distribution of mitre squid, uroteuthis chinensis, in the Beibu Gulf, South China Sea

作者：Yunrong Y.; Yuyuan L.; Shengyun Y.; Guirong W.; Yajin T.; Qibin F.; Huosheng L.

机构：[1]College of Ocean and Earth Sciences, Xiamen University, Siming District, Xiamen City, 361005, Fujian Province, South Siming Road, China;[2]College of Fisheries, Guangdong Ocean University, Zhanjiang, 524088, Guangdong Province, No. 40 East Jiefang Road, China;[3]Center of South China Sea Fisheries Resources Monitoring and Assessment, Guangdong Ocean University, Zhanjiang, 524088, Guangdong Province, No.40 East Jiefang Road, China

年份：2013

卷号：32

期号：3

起止页码：835

外文期刊名：Journal of Shellfish Research

收录：Scopus(收录号：2-s2.0-84891783147)

语种：英文

外文关键词：Beibu Gulf; Biological characteristics; Mitre squid; Spatial-temporal distribution; Uroteuthis chinensis

外文摘要：Based on seasonal sampling in the Beibu Gulf (Tonkin Gulf), South China Sea, from August 2010 to May 2011, biological characteristics such as growth, reproduction, and ingestion of 2,179 mitre squid, Uroteuthis chinensis, were investigated. The results showed that the maximum and minimum mantle lengths of U. chinensis were 438 mm and 49 mm, respectively, whereas the corresponding body weights were 723 g and 7.3 g, respectively. Both mantle length and body weight peaked in spring. The relationship between mantle length (L, in millimeters) and body weight (W, in grams) was W = 1.43 × 10-3 × L 2.19 (R 2 = 0.92), and between mantle length and gutted weight (W, in grams) was W = 1.04 × 10-3 × L 2.24 (R 2 = 0.97). The number of females was equal to that ofmales, with a sex ratio of 1:1.01. Furthermore, no obvious seasonal change was observed. There was no stage VI of gonad maturation, and stage I was dominant year-round. The feeding intensity was low and the empty stomach rate was high throughout the year. The mean trophic levels from spring to winter were 3.6, 2.7, 3.0, and 3.3, respectively. The results indicated considerable differences in the sampling areas. In addition, seasonal changes in catch and distribution were observable whereas biomass varied greatly.