Abstract Full Text:PDF Recommended articles Mail to Author How to Cite

¹ Ege University, Graduate School of Natural and Applied Sciences, Department of Fishing Technology and Seafood Processing Technology, Bornova/Izmir
² Ege University, Faculty of Fisheries, Bornova/Izmir, Turkiye
³ Ege University, Faculty of Fisheries, Bornova/Izmir, Turkiye
⁴ Ege University, Faculty of Fisheries, Bornova/Izmir, Turkiye DOI : 10.4194/TRJFAS26959 Viewed : 75 - Downloaded : 66 Fisheries are highly vulnerable to environmental and anthropogenic pressures and evaluating fish stocks is crucial for sustainable management. This study aims to assess the effects of sea surface temperature (SST), sea surface salinity (SSS), sea surface chlorophyll-a concentration (SSC), and lunar phases on the catch per unit effort (CPUE) of purse seine fisheries in the Aegean Sea. Catch data were collected from a purse seine vessel operating in İzmir Bay between 2017 and 2023. A generalized linear model (GLM) was employed to standardize CPUE values, considering various temporal and environmental factors. Results indicated significant variability in CPUE across years, months, and moon phases, with the highest CPUE observed during January and the last quarter lunar phase, while April and the full moon phase exhibited lower catch rates. SSC had a significant negative effect on CPUE, whereas SST and SSS showed no statistically significant influence. The decline in CPUE over the study period suggests increasing pressure on fish stocks, highlighting the importance of monitoring environmental changes for effective fisheries management. This study contributes to filling the knowledge gap on the impacts of SST and SSC on purse seine fishing in the Aegean Sea, offering insights for future fisheries policies and conservation efforts. Keywords : Catch per unit effort Environmental variables Sea surface chlorophyll-a Concentration Mediterranean sea