Length-Weight Relationship of the Most Landed Pelagic Fish Species European Pilchard (Sardina pilchardus Walbaum, 1792) and European Anchovy (Engraulis encrasicolus Linnaeus, 1758) in the İzmir Bay (Aegean Sea, Turkey) Purse Seine Fishery

Authors : Ahmet Mert ŞENBAHAR, Özlem GÜLEÇ, Zafer TOSUNOĞLU, Okan ÖZAYDIN

Pages : 32-37

Doi:10.33714/masteb.673318

View : 21 | Download : 11

Publication Date : 2020-06-30

Article Type : Research Paper

Abstract :Length-weight relationships insert ignore into journalissuearticles values(LWR); of the most landed pelagic fish species  Sardina pilchardus   Walbaum, 1792 and   Engraulis encrasicolus   Linnaeus, 1758 in the Izmir Bay purse seine fishery were determined to reveal latest situation. Purse seine is a non-selective fishing gear compare to the other fishing gear such as gillnet or trammel net. For this reason, sampling all size individuals is very important to calculate mean length and other LWR parameters. In this study, seasonal LWR coefficient and minimum-maximum lengths were established as monthly basis. LWR of   S. pilchardus   and   E. encrasicolus   were   W   = 0.0059 L 2 .793 0   insert ignore into journalissuearticles values( r ² = 0. 94); and W   = 0.0019 L 3. 4 207 , insert ignore into journalissuearticles values( r ² = 0.87);, respectively. Growth type of the   S. pilchardus   was found negative allometric whereas   E. encrasicolus   was positive allometric. A decrease of the mean total length of   S. pilchardus   has been considerable variable from 1994 to 2014 in Izmir Bay but with this study, it is observed that mean length of the sardine found near of 2006 value related to seasonal fishing pressure.
Keywords : Sardina pilchardus, Engraulis encrasicolus, LWR, Izmir Bay, Purse seine fishery