| 摘要: |
| 根据2012年4月(春季)、10月(秋季)在乐清湾口的大小门岛海域开展拖网渔业资源调查所获得的鱼类数据, 用渔获率作为鱼类资源数量分布的指标, 对乐清湾口调查海域的鱼类种类组成、区系特点、数量分布等进行了分析。结果表明, 乐清湾口海域春、秋两季共获得并鉴定出的鱼类有49种, 隶属于10目26科,其中以鲈形目最多, 有20种, 占鱼类总种数的40.8%; 鲱形目次之, 有9种, 占鱼类总种数的18.4%; 优势种有龙头鱼和刀鲚; 数量是秋季较多且分布较均匀; 根据鱼类适温性可将该海域的鱼类分为暖水性和暖温性2种适温类型, 其中暖水性种类占55.1%; 同时, 根据其生态习性, 可分为河口性、沿岸性和近海性3种生态类群。 |
| 关键词: 鱼类 种类组成 数量分布 春、秋季 乐清湾口 |
| DOI：10.11693/hyhz201304033033 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目, 31270527号; 企业委托项目(温州大小门岛区域建设用海项目海洋渔业资源及渔业生产现状调查与分析), 2012.03—2013.03。 |
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| SPECIES COMPOSITION AND QUANTITATIVE DISTRIBUTION OF FISHES IN SPRING AND AUTUMN IN THE YUEQING BAY MOUTH |
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YAN Li-Na1, YE Shen1, LI De-Wei1, ZHOU Qing-Song2, XIE Xu1, ZHENG Ji1, CHENG Jun1, YU Cun-Gen1
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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 the data of demersal fishes that collected by bottom trawl in Yueqing Bay mouth, Zhejiang, in April and October 2012, we analyzed the species composition, fauna characteristics and quantitative distribution with the catch rate as the index of fish resource and spatial distribution. The results indicated that 49 species were found in spring and autumn, which belonged to 10 orders and 26 families. There were more species belonged to Perciformes than those in other orders, which had 20 species, and accounts for 40.8%, respectively. Followed by Clupeiformes, which had 9 species, and accounts for 18.4% of all the species. The dominant species in Yueqing Bay mouth were Harpodon nehereus and Coilia ectenes. There were more fish in autumn and the distribution was uniform. According to fishes’ thermal adaptation, fish in this area could be grouped into two types, including warm-water species and warm-temperate species, and warm-water species accounts for 55.1%. According to the ecology habits, the fish species could be classified into three types, estuary species, coastal species and offshore species. |
| Key words: fishes species composition quantitative distribution spring and autumn Yueqing Bay mouth |
