| 摘要: |
| 根据 2010 年春季(5 月)、夏季(8 月)、秋季(11 月)与 2011 年冬季(2 月)对岱衢洋进行的共 4个航次的底拖网渔业资源调查资料, 对该海域的甲壳动物多样性进行了分析。 结果表明, 共捕获甲壳动物 21 种, 其中虾类 13 种、蟹类 7 种、虾蛄类 1 种, 隶属于 2 目 14 科 18 属; 甲壳动物的生物量与尾数密度均以秋季为最高, 春季则正好相反, 且该两季的生物量与尾数密度间差异均显著(P<0.05); 广温广盐种在种类数量、生物量与尾数密度方面均居主导地位; Margalef 丰富度指数(D)、Shannon-Wiener 多样性指数(H′)和 Pielou 均匀度指数(J′)的最小值均出现在冬季, 表明该季甲壳动物群落的丰富度、多样性与均匀性都较低, 另外, D 值、H′值夏、秋两季高, 冬、春两季低, 与较外海域的情况正好相反, 这主要是其对底层水温季节变化的一种响应。 |
| 关键词: 岱衢洋, 甲壳动物, IRI, 多样性, 优势种 |
| DOI：10.11693/hyhz201201016016 |
| 分类号: |
| 基金项目:海洋公益性行业科研专项经费项目, 200905019-4 号, 201005013-2 号; 国家科技支撑计划项目, 2007BAD43B01 号, 2007BAD43B02 号; 浙江省海洋渔业局项目, 浙海渔计(2011)56 号; 海洋渔业科学与技术浙江省重中之重学科开放课题, 20100214 号 |
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| SEASONAL VARIATIONS OF DIVERSITY OF CRUSTACEANS CAUGHT BY BOTTOM TRAWL IN DAIQUYANG |
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ZHANG Hong-Liang1,2, PAN Guo-Liang1,2, WANG Wei-Ding1,2, ZHOU Yong-Dong1,2, XU Han-Xiang1,2
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1.Marine Fisheries Research Institute of Zhejiang Province;2.Key Research Station for Fisheries Resources of Main Fishing Ground, Ministry of Agriculture
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| Abstract: |
| Based on the data of bottom trawl surveys in Daiquyang during spring (May), summer (August), autumn (November) 2009, and winter (February) 2010, the species diversity of crustaceans was analyzed. The results indicated that a total of 21 crustacean species belonging to 18 genera, 14 families and 2 orders were obtained including 13 species of shrimps, 7 species of crabs and 1 species of squills. Palaemon gravieri was the dominant species in all seasons. Both the biomass and abundance density of crustaceans reached the maximum in autumn, but decreased to the minimum in spring, and the difference in the biomass and number abundance density was significant (P<0.05). By correlation test results, the biomass shown significant quadratic related with average bottom sea salinity (P<0.05). The eurythermal and euryhaline species in the species number, biomass and abundance density all occupied the dominant position, and all dominant species were eurythermal and euryhaline species in the investigated waters. The Margalef richness index (D), Shannon-Wiener diversity index (H′) and Pielou evenness index (J′) in winter was lowest among all the seasons, which shown that the richness, diversity and evenness of crustaceans in winter were all lower. Meanwhile the Margalef richness index (D) and Shannon-Wiener diversity index (H′) in summer and autumn were higher than those in winter and spring in Daiquyang, however, which was contrary in the offshore deep waters, the opposite phenomenon between Daiquyang and offshore deep waters was mainly due to its response to the seasonal variations of bottom sea water temperature. |
| Key words: Daiquyang, Crustaceans, IRI, Diversity, Dominant species |
