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GÖKKUŞAĞI ALABALIĞININ (ONCORHYNCHUS MYKISS) PERFORMANSI ÜZERİNE SINIRLI YEMLEMENİN ETKİLERİ

EFFECTS OF RESTRICTED FEEDING ON PERFORMANCES OF RAINBOW TROUT (ONCORHYNCHUS MYKISS)

Journal Name:

  • Anadolu Tarım Bilimleri Dergisi

Publication Year:

  • 2006

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Rainbow trout (104.8±0.15g), Oncorhynchus mykiss, were fed a commercial extruded pellet for 7 weeks to investigate the effect of restricted feeding on performances. Three restricted feeding were tested: two day intervals (TDI), every other day (EOD) and twice a day (TD). Fish were held in fresh water at 9-13°C from January 16 to March 4, 2004. Feed conversion rate (FCR) were TDI and TD groups 1.33±0.03 and EOD group 1.54±0.03, protein efficiency ratio (PER) were TDI group 1.88±0.04, EOD group 1.59±0.03 and TD group 1.85±0.04, respectively. Although FCR was the same between TDI and TD, there was a significant differences in weight gain, relative growth rate (RGR) and specific growth rate (SGR) between the groups. These group evaluated the food at the same rate but since the given food amount were different, the weight gain, SGR and RGR of TD were the highest dependent to the food amount. Although the FCR was good in restricted fed fish, the taken feed amount sigificantly affected the growth parameters of fish. Relative growth rate (RGR), weight gain and specific growth rate (SGR) were lower in TDI and EOD groups. Both specific growth rate and relative growth rate increased with number of restricted feeding. The restricted feeding influenced the chemical composition of the fish. The lipid, moisture and protein content of fish increased when the fish were fd twice a day (TD group). In terms of SGR and RGR, it can be concluded that the best growth rate was obtained from the fish fed twice a day (TD) and every other day (EOD) feeding for rainbow trout at 9-13°C.
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Abstract (Original Language): 
Gökkuşağı alabalığı, (Oncorhynchus mykiss) (104.8±0.15g), performansı üzerine sınırlı yemlemenin etkilerini araştırmak için 7 hafta süresince ticari ekstrüde yemle yemlenmiştir. Her gün (TD), gün aşırı (EOD) ve üç günde bir (TDI) olmak üzere üç farklı yemleme frekansı uygulanmıştır. Balıklar 16 Ocak-4 Mart 2004 tarihleri arasında, 9-13°C su sıcaklıklarında tatlı suda tutulmuştur. Yem dönüşüm oranları TD ve TDI gruplarında 1.33±0.03 ve EOD grubunda 1.54±0.01, Protein verimlilik oranları TDI grubunda 1.88±0.04, EOD grubunda 1.59±0.03 ve TD grubunda 1.85±0.04 arasında kaydedilmiştir. FCR değerleri TDI ve TD grupları arasında aynı olmasına rağmen, bu gruplar arasında ağırlık kazancı, spesifik büyüme oranı (SGR) ve oransal büyüme oranı (RGR) arasında önemli farklılıklar vardır. Bu gruplar yemi aynı oranda değerlerdirmişler fakat verilen yem miktarları farklı olduğu için yem miktarına bağlı olarak TD grubunda ağırlık kazancı, SGR ve RGR en yüksek kaydedilmiştir. Sınırlı oranda yemlenen balıkların yem değerlendirimi ne kadar iyi olsa da aldıkları yem miktarları balıkların büyüme parametrelerini oldukça önemli bir şekilde etkilemektedir. Oransal büyüme oranı (RGR), ağırlık kazancı ve spesifik büyüme oranı (SGR) EOD ve TDI gruplarında ise daha düşük bulunmuştur. Hem spesifik büyüme oranı hem de oransal büyüme oranı yemleme frekansının artışıyla birlikte artış göstermiştir. SGR ve RGR değerlerine bakılarak, gökkuşağı alabalığın için en iyi büyüme oranının 9-13°C de her gün iki kez (TD) ve gün aşırı iki kez (EOD) yemlemeden elde edildiği sonucuna varılabilir.
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  • Turkish

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