Analysis of the positioning factors affecting the sustainable fishing gear-Set net

Abstract

Using a passive method to catch fish, the set-net fishery is an environmentally friendly fishery posing little risk to the marine ecosystem. To date, no studies have been conducted by industry, government, or academia to formulate a set of physical selection criteria for the installation of set nets. In this study, meteorological and sea condition data were collected around existing set-net fishing grounds in Taiwan, and binary logistic regression analysis and sequential logistic regression methods were used to determine the factors that affect the installation of set nets to confirm the future development of this fishery. According to the results of binary logistic analysis and comparison of physical factors in the waters near Xiaoliuqiu, Pingtung County, Nanliao City, Hsinchu City, Qixingtan City, and Hualien City, where there are set-net fishing grounds, ocean temperature (OCT) and sea surface factors, namely, maximum wind speed (OSWm), wave (WV), air temperature (TEMP) and air pressure (PRES), are the primary factors affecting the installation of set-nets. The results of sequential logistic regression and odds ratio analysis were also used to verify the degree of influence of the determinants of these three sea areas on the nearby set-net fishing grounds. The fish catch data from the fishing grounds studied fitted very well to the examined physical factors in different regions.