The potential of dry olive cake in a practical diet for juvenile hybrid tilapia, Oreochromis niloticus x Oreochromis aereus
[ X ]
Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A feeding trial of 84 days was carried out to evaluate the effects of olive cake (OC) on growth, feed utilization, digestibility of nutrient, haematological values and some blood chemistry parameters of juvenile hybrid tilapia (Oreochromis niloticus x Oreochromis aereus). Four diets were prepared including OC at levels of 0, 120, 240 and 360 g kg(-1). Twenty fish per tank (initial weight 8.58 +/- 0.09 g) were randomly distributed into 200-L fibreglass tanks. Final body weight and specific growth rate of fish fed with diets OC12 were not significantly different compared to fish fed with the control diet. The best feed conversion rate and protein efficiency rate were obtained from the fish fed with the control and OC12 diets. Growth performance, feed conversion rate and protein efficiency rate of fish fed diets with OC incorporation levels of more than 12 per cent tended to decrease significantly (P < 0.05) compared to the control and OC12 diet groups. The apparent digestibility coefficients (ADC) of dry matter significantly decreased (P < 0.05) with the increase of dietary OC levels, whereas the ADC of protein was not affected by dietary treatment. The ADC of lipid of fish fed with control and OC12 diets were significantly (P < 0.05) higher than those of fish fed with OC24 and OC36 diets. Mean corpuscular haemoglobin, cholesterol and triglycerides were affected by dietary OC level. The findings of this study show that OC can be incorporated to diets of juvenile hybrid tilapia up to 120 g kg(-1) without any adverse effect on fish growth and feed utilization.
Açıklama
Anahtar Kelimeler
digestibility, growth, haematology, hybrid tilapia, olive cake, Oreochromis niloticus x Oreochromis aereus
Kaynak
Aquaculture Nutrition
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
22
Sayı
5
