SEBARAN DAERAH TANGKAP IKAN TONGKOL (Euthynnus sp.) DI PERAIRAN SELATAN JAWA

Abstract

The high utilization of the community towards mackerel is contradicted by the majority of the fleet owned by fishermen in South Java in the form of gill net and long line which are the specifications for capturing other large tuna and pelagic. Maps of mackerel fishing areas are needed by fishermen, especially when the fish famine season takes place as the backbone of the fishermen’s catch. Raw data of the catch is obtained from the log book of Cilacap  Oceanic Fishing Port catch throughout 2017. This research aimed to (1) analyze the distribution of mackerel fishing for gill net and long line fishing gear in the coastal of South Java and (2) analyze the distribution of the average layer thickness of the optimum water temperature and salinity for mackerel. The result of this study shows that the number of mackerel fishing areas (Euthynnus sp.) for gill net fishing equipment is 105,56⁰-110,78⁰ E and 7,48⁰-11,57⁰ S and for long line fishing gear is 106,69⁰-109,46⁰ E and 7,84⁰-9,37⁰ S. The distribution of mackerel fishing areas using the highest gill net in August with the acquisition of 76.634 kg of catch, while using the long line in July with the acquisition of catch results of 18.741 kg. The upright distribution of the average water temperature for mackerel is optimal in July, August, September for gill net and July and November for the long line, 26-27⁰ C. The upright distribution of monthly average water salinity for mackerel is also optimum in July, August, September for gill net and long line throughout the year except January is the optimum range which ranges from 34,0 to 43,3 %o.