| 摘要: |
| 根据 2006 年 8 月、2007 年 1 月、5 月和 11 月 4 个季节在舟山渔场及邻近海域(29°30′N—32°00′N, 127°E 以西)开展海洋生态系统综合调查时所获得的蟹类调查资料, 以渔获率作为蟹类数量指标分析该海域蟹类资源状况, 包括种类组成、数量分布和时空变化。结果表明, 本次舟山渔场及邻近海域调查共得蟹类种类 43 种, 隶属于 10 科、21 蟳 属。优势种类为细点圆趾蟹、双斑 、三疣梭子蟳 蟹、日本 、红星梭子蟹、红线黎明蟹, 以上 6 种蟹类占蟹类总渔获量的 94.58%。本次调查与 20世纪 90 年代末在东海大陆架海域的蟹类资源调查结果相比, 蟹类种类组成和优势种变化不大。从蟹类渔获率来看, 秋季以舟山渔场最高, 夏季以江外渔场最高, 蟹类资源密集区主要位于长江口渔场和舟山渔场北部。 |
| 关键词: 蟹类, 种类组成, 数量分布, 舟山渔场 |
| DOI：10.11693/hyhz201201024024 |
| 分类号: |
| 基金项目:国家自然科学基金项目, 30970464 号; 浙江省科技厅资助项目, 2006C23051 号; 浙江省教育厅资助项目, Y200908032 号 |
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| SPECIES COMPOSITION AND SPATIO-TEMPORAL DISTRIBUTION OF CRABS IN ZHOUSHAN FISHING GROUND AND ITS ADJACENT AREAS |
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ZHENG Xian-Zhi1, YU Cun-Gen1, CHEN Xiao-Qing1, ZHENG Ji1, NING Ping1,2, JIANG Xin-Qin1
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1.Marine Fishery College of Zhejiang Ocean University;2.Second Institute of Oceanography, State Oceanic Administration
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| Abstract: |
| Based on data from the comprehensive investigation of marine ecosystem in August, 2006 and January, May, and November 2007, we use catch rate as the index for quantitative distribution of crabs, and analyze the changes of species composition and quantitative distribution of crabs in 29°30′—32°00′N, west of 127°00′E in the Zhoushan fishing ground and adjacent waters. Results show that there are 43 species of crabs being identified in the survey area, belonging to 10 families and 21 genera. The main dominants, Ovalipes punctatus, Charybdis bimaculata, Portunus trituberculatus, Charybdis japonica, Portunus sanguinolentus, Matuta planipes, however, account for 94.58% of the total catch. Compared to the results of the crab resource survey in the East China Sea in 1990s, the species composition and dominant species have not changed. In autumn, Zhoushan fishing ground has the highest CPUE, and in summer, it’s in the Jiangwai fishing ground. The highest catch of crabs is in the north of Zhoushan fishing ground and the Yangtze estuary fishing ground. |
| Key words: Crabs, Species composition, Quantitative distribution, Zhoushan fishing ground |
