春秋季台州湾海域鱼类资源的时空分布特征研究

发布时间：2018-06-22 02:00

本文选题：鱼类 + 密度　；参考：《水产学报》2014年09期

【摘要】：为研究浙江近岸河口海域鱼类资源分布的时空变化特征,利用2010年4月(春季)和10月(秋季)鱼山渔场台州湾海域底拖网游泳动物资源调查资料,分析了台州湾鱼类资源量的时空分布特征和优势种、温度、盐度、水深等因素对鱼类资源量和分布的影响。结果发现,鱼类尾数密度和质量密度变化趋势一致,秋季鱼类质量密度和尾数密度均远远高于春季;春季调查海域鱼类密度北部高于南部,秋季截然相反。回归分析显示,两季优势种对鱼类资源量变化均有密切关系,其中,龙头鱼对鱼类资源量的贡献率明显高于其他物种,两季均为第一优势种。调查海域底层温度与鱼类质量密度和尾数密度均呈显著的正相关关系(PW=0.001,PN=0.009),水深与资源量相关关系不显著(Pw=0.067,PN=0.051),春季20 m以内水深鱼类资源量较高,而秋季密度高值区水深均大于20 m。研究表明,台州湾海域春秋季鱼类资源密度季节变化明显,空间差异显著,底层水温是主要影响因素。
[Abstract]:In order to study the temporal and spatial variation of fish resources distribution in the estuarine area of Zhejiang Province, the survey data of bottom trawling animals in Taizhou Bay in April (spring) and October (autumn) 2010 were used. The effects of time and space distribution characteristics, dominant species, temperature, salinity and water depth on fish resources in Taizhou Bay were analyzed. The results showed that the trend of fish Mantissa density and mass density were the same, the fish mass density and Mantissa density in autumn were much higher than those in spring, and the density of fish in the north was higher than that in the south in spring, and the opposite was observed in autumn. Regression analysis showed that the dominant species were closely related to the changes of fish resources, and the contribution rate of faucet to fish resources was significantly higher than that of other species, and both seasons were the first dominant species. There was a significant positive correlation between bottom temperature and fish mass density and Mantissa density (PWN 0.001), but no significant correlation between water depth and resource quantity (Pwl0. 067 PNN 0. 051). The water depth of fish within 20 m in spring was higher than 20 m, but the water depth in high density area in autumn was more than 20 m. The results showed that the density of fish resources in Taizhou Bay changed obviously in spring and autumn, and the spatial difference was significant. The bottom water temperature was the main influencing factor.
【作者单位】：中国水产科学研究院东海水产研究所;
【基金】：国家“九七三”重点基础研究发展计划(2010CB428705) 海洋公益性行业科研专项(201305027-8)
【分类号】：S931.1

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