Historical dynamics of the demersal fish community in the East and South China Seas
Journal
Marine and Freshwater Research
Journal Volume
71
Journal Issue
9
Pages
1073-1085
Date Issued
2020
Author(s)
Abstract
Taiwan has a long history of fishery operations and contributes significantly to the global fishery harvest. The East and South China seas are important fishing grounds for which publicly available data are very limited. More efforts are needed to digitise and analyse historical catch rate data to illuminate species and community changes in this region. In this study we digitised historical records of catch and effort from government fishery reports for nine commercial species caught by otter trawl, and reported quarterly from 1970 to 2001, from the East and South China seas. We analysed the four seasons and present abundance indices, distributions and among-species correlations for nine commercially important species from 1970 to 1988 (a period with high fishing effort) using a multispecies spatiotemporal model that estimates both covariation in multispecies catch rates, attributed to spatial habitat preferences and environmental responses, and indices representing trends in abundance and distribution. We found substantial spatial, temporal and spatiotemporal variation in the distribution of fishes and season-specific patterns. We recommend collaborative work from various adjacent countries to digitise historical records of fishing catch rates, because more records would potentially address scientific disagreements regarding trends in the abundance and distribution of commercial fishes in this region through comparative studies. © 2020 CSIRO.
Other Subjects
catch per unit effort; community structure; demersal fish; digitization; fishery production; governance approach; historical record; spatiotemporal analysis; trawling; Pacific Ocean; South China Sea; Pisces
Type
journal article