中国水产科学2017，Vol.24Issue(5)：963-969,7.DOI:10.3724/SP.J.1118.2017.17078
时空及环境因子对黄河口及邻近水域斑(鰶)资源丰度的影响
Generalized additive model reveals effects of spatiotemporal and environmental factors on the relative abundance distribution of Konosirus punctatus in the Yellow River estuary and its adjacent waters
摘要
Abstract
Konosirus punctatus is an important detritus-feeding fish and the prey of many high-trophic-level species in the Yellow River estuary ecosystem.Thus,K.punctatus has large effects on the abundance distribution of many fish species in the waters.The distribution of K.punctatus relative abundance in relation to spatiotemporal and environmental factors were analyzed using generalized additive models (GAM) based on bottom trawl surveys conducted during July,August,and October 2013 in the Yellow River estuary and its adjacent waters.Pearson correlation analysis was indispensable for determining whether factors introduced in the model were significantly correlated,as included variables should be independent.The relative abundance of K.punctatus varied noticeably with resource abundance,being high in autumn and low in summer.Additionally,K.punctatus was mainly distributed in the coastal waters of the northern Yellow River estuary;however,with seasonal decreases in food resources and temperature,the distribution gradually moved to the open sea.A minimum Akaike information criterion (AIC) was used to determine the best-fit.GAM,via a stepwise method.Month,depth,sea-surface salinity,and phytoplankton abundance significantly affected the abundance distribution of K.punctatus in the Yellow River estuary and its adjacent waters.The final model explained 56.96％ of the deviance,with phytoplankton abundance contributing the most (21.04％).Konosirus punctatus abundance generally decreased with depth and increased with increasing phytoplankton abundance and sea-surface salinity.Specifically,abundance was relatively high in phytoplankton-rich waters ＜10 m in depth and with a sea-surface salinity of 17.These conditions may be related to reproduction-related migration,as well as estuarine environmental variation from the combined effects of freshwater runoff and tidal movement.In a future study,more data on quantifiable social and biological factors will increase the reliability of our conclusions.Nonetheless,the results of this study should contribute to the conservation and sustainable use ofK.punctatus in the Yellow River estuary and adjacent waters.关键词
斑(鰶)/黄河口/GAM模型/资源丰度Key words
Konosirus punctatus/Yellow River estuary/generalized additive model/resource abundance分类
农业科技引用本文复制引用
李敏,徐宾铎,麻秋云,张崇良,任一平,万荣,纪毓鹏..时空及环境因子对黄河口及邻近水域斑(鰶)资源丰度的影响[J].中国水产科学,2017,24(5):963-969,7.基金项目
公益性行业(农业)科研专项经费项目(201303050). （农业）
