[Relationship between the resource density of <i>Larimichthys polyactis</i> and the habitat environment factors in summer in Jiangsu coastal waters, China].

To understand the habitat distribution characteristics of <i>Larimichthys polyactis</i> in summer in Jiangsu coastal waters, we analyzed the relationship between resource density and habitat environment of <i>L. polyactis</i> by using a two-stage generalized additive model based on the survey data of fishery resources in August 2022, combined with the data of bottom water temperature, bottom salinity, depth, chlorophyll-a and prey species. The results showed that the average resource density of <i>L. polyactis</i> in summer was 15.03 kg·km^-2, which mainly distributed in the outer sea area of Lusi Fishing Ground and the middle sea area of Haizhou Bay Fishing Ground. The occurrence probability of <i>L. polyactis</i> was mainly affected by water depth and chlorophyll-a, with the contribution rate of water depth and chlorophyll-a being 40.8% and 10.2%, respectively. The resource density was mainly affected by water depth, chlorophyll-a, bottom salinity and the abundance of <i>Chaemrichthys stigmatias</i>. The bottom salinity was the variable with the largest deviation explanation (19.4%). Our results suggested that resource density of <i>L. polyactis</i> is closely related to its physiological habits, marine environment and the distribution of prey species.