基于广义可加模型分析时空和环境因子对2013年南极磷虾资源分布的影响

发布时间：2018-07-05 09:30

本文选题：南极磷虾 + 拖网调查　；参考：《水产科学》2015年10期

【摘要】：根据2013年1—9月南极磷虾拖网调查数据,以单位捕捞努力量渔获量作为资源密度指标,分析南极磷虾资源空间分布特征和月间变化。结果表明,1—6月的月均单位捕捞努力量渔获量值相对稳定,7—9月逐月下降。渔区的平均单位捕捞努力量渔获量值以48.1小区最高,为(25.12±31.04)t/h,48.3小区最低,为(11.49±12.06)t/h;单位捕捞努力量渔获量值的波动幅度48.1小区大于48.2小区和48.3小区。广义可加模型筛选出的解释变量对南极磷虾空间分布的影响由大到小依次为:月份、经度、拖网深度、水深、纬度和表层水温。各因子的偏差解释率分别为16.82%、11.17%、3.98%、1.75%、1.54%和0.88%,所有因子对单位捕捞努力量渔获量的总偏差解释率为36.14%。本次调查的结果可为研究南极磷虾渔场形成机制和渔业管理提供参考。
[Abstract]:Based on the survey data of Antarctic krill trawl from January to September 2013, the spatial distribution characteristics and monthly variation of Antarctic krill resources were analyzed by using the catch per fishing effort as the index of resource density. The results showed that the average monthly catch per unit fishing effort was relatively stable in January-June and decreased from July to September. The average catch per unit fishing effort in the fishing area was the highest in 48.1 plot, which was (25.12 卤31.04) t / h, the lowest was (11.49 卤12.06) t / h, and the fluctuation range of the fishing catch value per unit fishing effort was greater than that of 48.2 and 48.3 communities, and the average catch per unit fishing effort was (25.12 卤31.04) t / h and (11.49 卤12.06) t / h, respectively. The effects of the generalized additive model on the spatial distribution of Antarctic krill are as follows: month longitude trawl depth water depth latitude and surface water temperature. The deviation interpretation rates of each factor were 16.82% and 1.75% and 0.88%, respectively. The total deviation interpretation rate of all factors for the catch per unit fishing effort was 36.14%. The results of this investigation may provide reference for studying the formation mechanism and fishery management of Antarctic krill fishery.
【作者单位】：农业部海洋渔业资源可持续利用重点开放实验室山东省渔业资源与生态环境重点实验室中国水产科学院黄海水产研究所;中国水产学会信息咨询处;辽宁远洋渔业有限公司;
【基金】：公益性行业(农业)科研专项资助项目(201203018) 农业部渔业局资助项目(2130135)
【分类号】：S932.51

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