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Turkish Journal of Fisheries and Aquatic Sciences 2014, Vol 14, Num, 1     (Pages: 165-171)

The Reproductive Biology of Forkbeard, Phycis phycis (Linnaeus, 1766) (Phycidae) in the Adriatic Sea (Croatia)

Katarina Glavić 1 ,Tatjana Dobroslavić 2 ,Vlasta Bartulović 2 ,Sanja Matić-Skoko 3 ,Branko Glamuzina 2

1 Private Secondary School Dubrovnik, Sustjepanska 4, 20000 Dubrovnik, Croatia
2 University of Dubrovnik, Department of Aquaculture, Ćire Carića 4, 20000 Dubrovnik, Croatia
3 Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, P.O. Box 500, 21000 Split, Croatia
DOI : 10.4194/1303-2712-v14_1_18 Viewed : 4024 - Downloaded : 3105 The forkbeard, Phycis phycis (Linnaeus, 1766), is a species widely distributed throughout the Mediterranean and Adriatic Sea and although it is of great importance for fishing industry, little is known about its reproductive characteristics. This study provides first data on reproductive characteristics of this species in the Mediterranean, important for management and stock assessment. For this purpose a total of 550 individuals ranging from 19.9 to 45.8 cm in total length were collected monthly in a period of one year using trammel nets. Sex ratio of males to females was 0.62:1. The estimated length where 50% of analysed individuals were sexually mature was 30.98 cm for females and 32.98 cm males. The peak value of gonadosomatic index was recorded in November and continued throughout the December, indicating the highest spawning activity. This period is characterized by presence of oocytes with migrated nucleus and yolk coalesces in ovary and spermatozoa in testes. Keywords : Gadiform fish, spawning period, histology, gametogenesis