Catch composition and fishing efficiency of handlines used in Mediterranean horse mackerel (Trachurus mediterraneus) fishing in the South Eastern Black Sea


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Yeşilçiçek T.

ICAENS 2022: 2nd International Conference on Applied Engineering and Natural Sciences, Konya, Turkey, 10 - 13 March 2022, pp.273

  • Publication Type: Conference Paper / Summary Text
  • City: Konya
  • Country: Turkey
  • Page Numbers: pp.273

Abstract


Catch composition and fishing efficiency of handlines used in Mediterranean horse mackerel (Trachurus mediterraneus) fishing in the South Eastern Black Sea

In this study, the catch composition and catching efficiency of traditional handlines with various hook sizes used in Mediterranean horse mackerel (Trachurus mediterraneus) fishing were investigated in the South Eastern Black Sea between May 2020 and April 2021. Fishing operations were carried out monthly along Trabzon and Rize coastline at depths ranging from 1 to 40 m by using hand lines comprising of 4, 5, 6 and 7 number of J shaped hook sizes. A total of 5198 specimens belonging to 8 different fish species (Trachurus mediterraneus, Merlangius merlangus, Alosa immaculata, Pomatomus saltatrix, Trachinus draco, Engraulis encrasicolus, Mullus barbatus and Spicara smaris) were caught during the study. The target species Trachurus mediterraneus dominated the total catch with 4853 (93.4%) individuals. The fishing efficiency increased with decreasing hook sizes. The fishing efficiency per hook size in total catch were 35.1% (N=1826) for 7 number of hook, then followed by the number 6 (26.3%, N=1367), number 5 (22.1%, N=1148) and number 4 (16.5%, N=857). The catch rates of 4, 5, 6 and 7 number hook sizes under the minimum landing size (13 cm) for the target species Mediterranean horse mackerel were determined as 32.1%, 43.9%, 74.3% and 92.9%, respectively. According to results of the present study, it is recommended to use 4 and 5 number of hook sizes in handlines for targeting the Mediterranean horse mackerel to reduce fishing pressure on Mediterranean horse mackerel stocks and to ensure the sustainability of these stocks in the Black Sea.