Growth and exploitation rate of Dwarf Whipray (Brevitrygon heterura) landed from Tanjung Beringin, Serdang Bedagai Regency, North Sumatera Province

Abstract

Stingrays are a group of fish that have high economic potential landed at TPI Tanjung Beringin. The dominant type of stingray landed at TPI Tanjung Beringin is the Dwarf Whipray (Brevitrygon heterura) or commonly called Tuka-Tuka by the local community. This research wa carried out during July and September of 2021 at TPI Tanjung Beringin, survey method with a census technique, namely a method by seeking various information and various facts regarding the biological aspects. This study aims to determine the growth and exploitation rate of the dwarf whipray. There were 82 dwarf whipray, which were then measured for length and weight. The results of the study concluded that dwarf whipray (Brevitrygon heterura) which landed in TPI Tanjung Beringin had a negative allometric growth pattern, namely length growth was greater than weight growth. The exploitation status of the dwarf whipray (Brevitrygon heterura) in the waters of the Malacca Strait is classified as overfishing.

Sustainable stingray stock (Dasyatis sp.) in Malacca Strait, Serdang Bedagai Regency

“…While based on the rate of exploitation according to [13] in Tanjung Berigin Serdang Bedagai a smaller percentage of older fish compared to young fish are cought before mature, mortality of blue-spotted stingrays is more highly dominated by death due to capture. The exploitation conditions of stingray in Malacca Strait have experienced overfishing or excessive with exploitattion value is more than 0,5 [14] 3.6 Total Allowble Catch (TAC) Based on the results of the sustainable potential of Stingray (Dasyatis sp. ), the total allowable catch (TAC) is 29,797 tons/year, can be seen in Table 3.…”