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Articles by Mehmet Kocabas
Total Records ( 2 ) for Mehmet Kocabas
  Ramazan Serezli , Senol Guzel and Mehmet Kocabas
  In this study, fecundity and egg size of rainbow trout (Oncorhynchus mykiss), Black Sea trout (Salmo labrax) and brook trout (Salvelinus fontinalis) were examined. Two and six years old female fish reared in commercial fish farm were used and the female size, total and relative fecundity and egg size (mm) were determined for the broodstock fish of three tested species. The average weights of broodfish of rainbow trout, Black Sea trout and brook trout 1.357.27±406, 532±673.7 and 310.40±85.0 g, respectively. The total fecundity (number of eggs fish-1) was 2.809±791, 1.401±1374 and 723±320, the relative fecundity (number of eggs kg-1 fish) was 2.180±676, 3.558±1307 and 2.571±1530 and the egg size (mm); 4.95±0.2, 4.51±0.67 and 4.49±0.21 were determined for rainbow trout, Black Sea trout and brook trout, respectively. A significant linear relationship was found total fecundity and the post-stripped fish weight of Black Sea trout (r = 0.96), but this relationship was low for the rainbow trout (r = 0.28) and brook trout (r = 0.17). A negative relationship was observed between the relative fecundity and brood size in rainbow trout (r = 0.57), Black Sea trout (r = 0.58) and brook trout (r = 0.54). A significant linear relationship was observed in rainbow trout (r = 0.63), Black Sea trout (r = 0.86) and brook trout (r = 0.41) (p<0.01).
  Muhammed Arabaci , Yasin Yilmaz , Saltuk Bugrahan Ceyhun , Orhan Erdogan , Hakan Galip Dorlay , Ibrahim Diler , Suleyman Akhan , Mehmet Kocabas , Kerem Ozdemir , Hasan Koyun and Seyrani Koncagul
  S. aurata is a marine fish living along the Atlantic coasts of Europe and the Mediterranean Sea. It is an important food species, so that its production reached 128,943 t in the European aquaculture in 2008. However, little is known on its biology, in particular the efective and census sizes, distribution, spawning grounds and behaviour. Also the species subdivision still needs to be clarified. In this review, studies related with gilthead sea bream populations and problems with the clarification of gilthead seabream population structure in hatchery and wild were reviewed. Also, it was intensified on potential research areas, having importance in determination of population structure of gilthead seabream such as morphology and behaviour in hatchery and wild. Determination of the genetic structure of S. aurata populations based on behaviour and morphology will not only contribute greatly to biological clarification of the species but also will help the development strategy for conservation of natural stocks (e.g., protecting the stopover points) and the determination of reference stocks, which is important for the culture of gilthead seabream to use in the genetic improvement programmes.
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