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Articles by Yasin Yilmaz
Total Records ( 2 ) for Yasin Yilmaz
  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.
  Yasin Yilmaz and Muhammed Arabaci
  The effects of the stocking density on growth performance and feed efficiency in gilthead seabream Sparus aurata were investigated at cage culture conditions. Three stocking density (36, 40 and 44 fish m-3) were tested in the experiment lasted eleven months (from 1 January to 5 December 2006). Replication number was three in low stocking density group (36 fish m-3) two in medium density group (40 fish m-3) and three in high density group (44 fish m-3). A total of 2000 gilthead seabreams with a mean initial body weight of 36.4±0.4 g (mean±SE) were used in the experiment. Feeding regime was applied with commercial feeds as ad libitum. Weight gain, specific growth rate, thermal-unit growth coefficient increased linearly, daily feed intake, feed conversion rate decreased quadratically and protein efficiency rate increased quadratically with increasing stocking density in the range of 36-44 fish m-3. Results indicated that stocking density of 44 fish m-3 cause to improve on growth, feed efficiency and gross benefit compared to stocking densities of 36 and 40 fish m-3 in gilthead seabreams.
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