| 摘要: |
| 采用底层拖网法, 用渔获率作为鱼类资源数量分布的指标, 进行了杭州湾调查海域2012年5月(春季)、10月(秋季)2个季节的鱼类种类组成、区系特点、数量分布等研究。结果表明: (1) 杭州湾海域春、秋两季共获得并鉴定出的鱼类有31种, 隶属于9目15科, 其中以石首鱼科和 虎鱼科的种类为最多, 各有5种, 分别占总种数的16.7%; 鳀科鱼类次之, 有4种, 占总种数的13.3%, 优势种有睛尾蝌蚪 虎鱼、龙头鱼、刀鲚、棘头梅童鱼; (2) 根据鱼类适温性可将该海域的鱼类分为暖水性、暖温性和冷温性3种适温类型, 以暖温性种类为主, 暖水性种类次之, 而冷温性种类极少, 仅有1种; (3) 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; (4) 渔获数量分布规律是春季在调查海域的内侧或者说中西部较高, 而湾口较低, 秋季则正好相反。 |
| 关键词: 鱼类 种类组成 数量分布 春、秋季 杭州湾 |
| DOI：10.11693/hyhz201303018018 |
| 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(杭州湾区域建设用海项目海域生态环境现状调查), 2012.03—2013.03 |
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| SPECIES COMPOSITION AND QUANTITATIVE DISTRIBUTION OF FISHES IN THE HANGZHOU BAY DURING SPRING AND AUTUMN |
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XIE Xu1, YU Cun-Gen1, ZHOU Qing-Song2, LI De-Wei1, YE Shen1, ZHENG Ji1, YU Qiu-Mei1
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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 the Hangzhou Bay, east China in May and October 2012, we used the catch rates as the index of fish resource and spatial distribution, and analyzed fish species composition, fauna characters, and quantitative distribution in the survey area. The results show: (1) 31 fish species were found and identified in spring and autumn, which belonged to 9 orders and 15 families. More species belonged to Sciaeni-dae and Gobiidae, and each has 5 species, accounting for 16.7%; followed by Engraulidae, who had 4 species, taking 13.3% of all the species. The dominant species in the bay were Lophiohobius ocellicauda, Harpodon nehereus, Coilia ectenes, and Collichthys lucidus. (2) In thermal adaptation, fishes in this area could be divided into three types, including warm-water species, warm-temperate, and cold-temperate species. The fishes were caught mainly belonged to warm- temperate species, followed by warm-water species, and only one species belonged to cold-temperate species. (3) In ecology habits, the fish species could be separated into three types, estuary species, coastal species, and offshore species. (4) Distribution of the catch rates showed that more fishes were caught at the top of the bay, i.e. mid-west of the survey sea area in spring, and fewer fishes were caught at the mouth of the bay. The opposite was happened in autumn. |
| Key words: Fishes Species composition Quantitative distribution Spring and autumn Hangzhou Bay |
