Selektivitas Alat Tangkap Jaring Insang (Gillnet ) di Pangkalan Pendaratan Ikan (PPI) Tanjung Balai Provinsi Sumatera Utara

Abstract

Alcatch selectivity is an experimental fishing activity carried out to effectively test and measure the selectivity of gill nets at the Tanjung Balai Fish Landing Base (PPI) of North Sumatra Province. Two net sizes (1.5 and 2 inches) were randomly assigned and operated in the Malacca Strait to evaluate the size of the predominant fish caught. This study aims to determine the HTU (main catch) and bycatch (bycatch). To determine the size of the fish caught using gill nets with a mesh size of 1.5 and 2 inches at PPI Tanjung Balai. This research was carried out for three months, namely in September – November 2021. The catch data analysis was tabulated and presented in the form of tables and graphs where the data that could be entered was entered into Ms. Excel, then analyzed using descriptive statistics, namely the relationship between mesh size and catch as well as the frequency distribution of fish based on how they were caught (snagged, gilled, wedged, and entangled). The composition of Gill net catches at the Tanjung Balai Fish Landing Base (PPI) consists of the number of catches. The main catch (HTU) is the Gladiated Fish (Eleutheronema tetradactylum), and the Bycatch Fish (HTS) are the pufferfish (Rastrelliger sp), Dencis fish (Sardina sp) and Cincaru fish (Megalaspis cordyla). The proportion or percentage comparison of the total main catch (HTU) and by-catch (bycatch) based on the number of catches is 60% and 40%. Gill nets measuring 2 inches are the best mesh size based on The highest number of catches was 184 fish compared to (gillnet) which was 1.5 inches in size 135 fish, it was proven that the 2-inch mesh size was more selective according to the variance value, 483.3 compared to 1.5 inches with the 1977.1 variance value.