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根据2011年在海州湾及其邻近海域进行的5个航次的渔业资源和环境调查数据,分析该海域大泷六线鱼的空间分布特征及其季节变化,运用广义可加模型(GAM)研究时空因子和环境因子对其分布的影响。结果表明:海州湾及其邻近海域的大泷六线鱼主要集中分布于35.0°N~35.6°N,119.6°E~121.2°E海域;7月平均网获质量最高(4 709.19g/h),12月平均网获质量最低(66.92g/h)。大泷六线鱼的空间分布存在明显的季节变化,且主要分布于研究海域的东北部。GAM模型分析表明,底层水温是影响大泷六线鱼空间分布的主要环境因子。模型筛选出的解释变量对大泷六线鱼空间分布的影响从大到小依次为:月份、底层水温、纬度、底层盐度和经度,GAM模型的总偏差解释率为75.32%。
Abstract：Based on the data collected from bottom trawl surveys in Haizhou Bay and its adjacent waters in 2011,the spatial distribution and its seasonal variation of fat greenling Hexagrammos otakii were determined and the influence of spatiotemporal and environmental factors on the distribution pattern of H.otakii was studied using generalized additive model(GAM).The results showed that H.otakii mainly concentrated in an area(35.0°N~35.6°N and 119.6°E~121.2°E).Mean weight per haul of H.otakii was the largest in July(4 709.19g/h)and the lowest in December(66.92g/h).The spatial distribution of H.otakii showed an obvious seasonal variation.In general,H.otakii mainly distributed in northeastern Haizhou Bay.GAM analysis showed that sea bottom temperature was the main environmental factor that had a primary impact on the spatial distribution of H.otakii.The results of stepwise GAM showed that the five most important explanatory variables affecting the spatial distribution of H.otakii were month,sea bottom temperature,latitude,sea bottom salinity and longitude,and the deviance explanation by these explanatory variables was 75.32%in total.
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基本信息:
DOI：10.16441/j.cnki.hdxb.20140091
中图分类号:S932.4
引用信息:
[1]邢磊,徐宾铎,张崇良,等.环境因子对海州湾及邻近海域大泷六线鱼分布影响的分析[J],2015,45(06):45-50.DOI:10.16441/j.cnki.hdxb.20140091.
基金信息:
国家海洋公益性行业科研专项经费项目(201305030)资助