Biology of angler fish (Lophiidae) living in Central Aegean sea, Turkey

In this thesis, a total of 558 specimens were collected by the vessels engaged in commercial trawl fishing in the Central Aegean Sea between September 2017 and August 2018, in order to determine of biological features that includes their length,weight, age, sex ratios, lenght – age, weight – age, lenght – weight relationships and spawning periods. % 48,9 (n=273) of specimens caught in the research area were males, % 46,8 (n=261) were females and % 4,3 (n=24) specimens whose gender could not be determined. By reading of illicium individuals were found within II-XI age groups. Total lengths and weight ranged between 12 – 65 cm ve 24,5 – 4682 g respectively. W = 0,0135*L3,0227, W = 0,0289*L2,7576 and W = 0,0165*L2,9478 have given respectively. The highest gonadosomatic index (GSI) value is 1.48 for the spring term. Growth parameters of the population were found L∞=74.83 cm, K=0.18, t0= -0.34 and ϕ =2.99.