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Turkish Journal of Fisheries and Aquatic Sciences 2012, Vol 12, Num, 4     (Pages: 799-809)

Age, Growth, Mortality and Reproduction of the Chub Mackerel (Scomber japonicus Houttuyn, 1782) from Saros Bay (Northern Aegean Sea, Turkey)

Özgür Cengiz 1

1 Canakkale Onsekiz Mart University, Faculty of Fisheries, Çanakkale, Turkey DOI : 10.4194/1303-2712-v12_4_08 Viewed : 3829 - Downloaded : 4587 Age, growth, mortality and reproduction of the chub mackerel (Scomber japonicus Houttuyn, 1782) were determined using specimens collected from Saros Bay between January 2009 and December 2009. The length-weight relationship was calculated as W=0.0061TL3.12 for females, W=0.00691TL3.08 for males and W=0.0066TL3.10 for all samples. Growth parameters of the populations were L=37.3 cm, k=0.22 year-1, t0=-1.93 year for females; L=41.4 cm, k=0.17 year-1, t0=-2.37 year for males and L∞=39.0 cm, k=0.20 year-1, t0=-2.13 year for all samples. It was observed that spawning period occured between June and August. The length at first maturity was estimated as 18.0 cm for all samples. Total mortality rate (Z), natural mortality rate (M), fishing mortality rate (F) and exploitation rate (E) of the chub mackerel were 0.91 year-1, 0.34 year-1, 0.57 year-1 and 0.62 year-1, respectively. Keywords : Stock structure