| 摘要: |
| 根据2006 年5 月、9 月、11 月和2007 年2 月浙江南部外海渔业资源调查结果, 用渔获率作为鱼类资源分布的数量指标, 对浙江南部外海的鱼类种类组成、数量分布、季节变化趋势作了定量分析。结果表明, 浙江南部外海调查海域鱼类种类约有205 种, 其中海南鳒鲆、长臂沙鲽是2 个东海区新记录种。刺鲳、竹筴鱼、发光鲷、条尾鲱鲤、尖牙鲷、短鳍红娘鱼、短鳄齿鱼、带鱼、多棘腔吻鳕、花斑蛇鲻等22 种鱼类是调查海域底拖网的主要捕捞鱼类, 约占鱼类总渔获量的64.58%, 而其它种类的渔获量较少。不同季节的经济鱼类渔获物组成相差较大, 渔获量高峰期主要出现在夏、秋季, 主要捕捞刺鲳、竹筴鱼、条尾鲱鲤、短鳍红娘鱼、黄鳍马面鲀等, 而带鱼主要出现在春、夏季和冬季。资源数量分布较高的海区是27°30′—28°30′N 海域以及26°00′—27°00′N、121°30′—123°00′E海域, 而春季、秋季和冬季虽然资源密度没有夏季高, 秋季和冬季调查海域的鱼类资源数量明显下降,
但其数量的地理分布趋势与夏季基本相同。主要种类的空间分布特点如下：刺鲳、带鱼、海鳗、日本红娘鱼、日本方头鱼等的主要渔场分布在80—100m 水深海域; 黑 、真鲷、鲐鱼、高体若鲹等的主要渔场分布在100—200m 水深海域; 而竹筴鱼、条尾鲱鲤、短鳍红娘鱼等则在整个调查海域都有分布, 属于分布范围广的种类。
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| 关键词: 鱼类, 种类组成, 数量分布, 浙江南部外海 |
| DOI：10.11693/hyhz200903016016 |
| 分类号: |
| 基金项目:浙江省科技厅资助项目, 2005C33055 号；浙江省海洋与渔业局资助项目, 05-09 号 |
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| FISH SPECIES AND QUANTITY OFF SOUTHERN ZHEJIANG, EAST CHINES SEA |
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YU Cun-Gen1, YU Cong-Da1, ZHANG Fei-Jun1, NING Ping1,2, ZHENG Ji1
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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: |
| Bottom trawling surveys were conducted in the areas off southern Zhejiang, in East China Sea, in May, September, November, 2006 and February, 2007, the composition, quantity, and variation of fish species are reported using relative fishing rate as the quantity index. A total of 205 species were identified, of which Psettina hainanensis and Samariscus longimanus are new recorded species in East China Sea. 22 species, such as Psenopsis anomala, Trachurus japonicus, Acropoma japonicum, Upeneus bensasi, Synagrops japonicus, Lepidotrigla micropterus, Champsodon snyderi, Trichiurus haumela, Coelorhynchus multispinulosus, Saurida undosquamis etc., were the most abundant ones taking 64.58% of total catch. The composition of fish species showed clear seasonal change. The best fishing time shall be summer and autumn for Psenopsis anomala, Trachurus japonicus, Upeneus bensasi, Lepidotrigla micropterus and Navodon xanthopterus, and spring, summer and autumn for Trichiurus haumela. The central fishing ground located mainly in 27°30′—28°30′N, 26°00′—27°00′N and 121°30′—123°00′E. The patterns of catch quantity were similar in all seasons, though the abundance index of summer was higher than that of in other three seasons; especially, the index had a clear decline in autumn and winter. The species of Psenopsis anontala, Trichiurus haumela, Muraenesox cinereus, Lepidotrigla japonica and Brabchiostegus japonicus etc. were mainly caught in 80—100m depth; Lophiomus setigerus, Pagrosomus major, Pseumatophorus japonicus, Caranx equula etc. distributed mainly in 100—200m; and Trachurus japonicus, Upeneus bensasi, Lepidotrigla microptera etc. were in the whole range.
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| Key words: Fishes, Species composition, Quantitative distribution, The offshore waters of southern Zhejiang Province |
