Seasonal variation in mortality of red mullet (<em>Mullus barbatus</em>) escaping from codends of three different sizes in the Aegean Sea

F. Ozan Düzbastılar; Michael Breen; Celalettin Aydın; Hüseyin Özbilgin; Aytaç Özgül; Ali Ulaş; Gülnur Metin; Benal Gül; Altan Lök

doi:10.3989/scimar.04600.19A

Autores/as

F. Ozan Düzbastılar Ege University, Faculty of Fisheries https://orcid.org/0000-0002-5376-7198
Michael Breen Institute of Marine Research https://orcid.org/0000-0002-1082-1043
Celalettin Aydın Ege University, Faculty of Fisheries https://orcid.org/0000-0001-8237-6121
Hüseyin Özbilgin Mersin University, Faculty of Fisheries https://orcid.org/0000-0002-7277-0608
Aytaç Özgül Ege University, Faculty of Fisheries https://orcid.org/0000-0001-7706-9012
Ali Ulaş Ege University, Faculty of Fisheries https://orcid.org/0000-0001-8012-2769
Gülnur Metin Ege University, Faculty of Fisheries https://orcid.org/0000-0001-5807-5839
Benal Gül İstanbul University, Faculty of Fisheries https://orcid.org/0000-0001-8544-7343
Altan Lök Ege University, Faculty of Fisheries https://orcid.org/0000-0003-0751-0620

DOI:

https://doi.org/10.3989/scimar.04600.19A

Palabras clave:

mortalidad post captura, arrastre de fondo, mortalidad dependiente de la talla, variación estacional, luz de malla, forma de la malla, mar Egeo

Resumen

El estudio se llevó a cabo frente a la costa sur de la isla de Yassica en la Bahía de Izmir, costa turca del mar Egeo para investigar la mortalidad post captura del salmonete (Mullus barbatus, Mullidae) que escapa de las redes de pesca con copos de malla cuadrada de 40 mm, y romboidales de 44 y 50 mm acoplados a una red tradicional de arrastre demersal. En total, se realizaron 48 lances experimentales durante el verano e invierno de 2011 y 2012. La media de la mortalidad post captura para todos los lances en invierno (33.2%±6.51) fue significativamente mayor (p<0.0001) que en verano (26.5%±6.19). Además, la mortalidad fue más alta entre los individuos más pequeños, especialmente en invierno. Independientemente de la estación, la mortalidad post captura del salmonete fue inferior con el copo de luz de malla cuadrada de 40 mm (media, 25.5%±4.58). Estas observaciones ponen de manifiesto la importancia de la investigación de la supervivencia potencial de los peces que escapan de las redes de pesca a la hora de considerar los beneficios de distintos dispositivos selectivos en la gestión de una pesquería.

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