Determination of Food Preference of Blacksea Trout (Salmo trutta labrax) in The Early Feeding Stage

Abstract

In this study, granule usage success of the Blacksea trout (Salmo trutta labrax) fry groups, which were produced from natural and F1-F2 generation hatchery originated parents, were investigated in the first feeding stage. Two different fry groups were constituted as their parents obtained from nature (1st Group) and hatchery (2nd Group). Both groups were divided in to live food (newly hatched Artemia naupli), mixed and granule feeding groups. Study was performed in to 15 days three periods. In the first period, live feed groups were fed with 5 times in a day; second groups were fed with two times live food and three times granule feed; and third groups were fed with five times granule trout granules. Granule feed feding adaptation were completed at the end of the third period in all groups. At the end of the study, 1st group was estimated more advantageous than 2nd group on the behalf of the weight gaining. Live and granule feed groups of the 1st group were assessed as statistically similar and advantageous among the different feeding groups of the both groups. Feeding groups of the 2nd group were similar (P<0.05). Condition factors of the all feeding groups of the 1st group and granule feeding group of the 2nd group were similar and advantageous from others. It is concluded that the worst condition factor was mixed feeding group of the 2nd group (P<0.05). Mortalities of the granule feeding groups of the both groups were higher in the first period, and lower than others in the rest of the study. That results were showed that starting to the granule feed feeding was more preferable than gradually adaptation to the granule feed feeding for the survival rate. In this study, under the farm conditions, it was concluded that they could be fed with granule trout feed unless using the live food in the early feeding stage, although Blacksea trout had nervous behavior during and after first feeding stage, and not became tame accurately

Keywords

• Brown trout, Salmo trutta labrax, First feeding, Survival, Live food, Granule trout feed

Karadeniz Alabalığı (Salmo trutta labrax)‘nın Ön Besleme Evresinde Yem Tercihinin Belirlenmesi

Abstract

Bu çalışmada ebeveynleri doğadan yakalanmış Karadeniz alabalığı (Salmo trutta labrax) yavrularının ve F1-F2 jenerasyonu yavruların ön besleme evresinde granül yem kullanımının başarısı irdelenmiştir. Ebeveynleri doğadan yakalanmış yavrular (I. Grup) ve ebeveynleri kuluçkahaneden üretilmiş yavrular (II. Grup) olmak üzere iki grup oluşturulmuştur. Her iki grup (henüz açılmış Artemia nauplisi), karışık ve granül yemleme gruplarına bölünmüştür. Çalışma 15 günlük üç periyotta yürütülmüştür. İlk periyotta canlıyem grupları günde 5 öğün canlı yemle, ikinci gruplar, iki öğün canlıyem, diğer öğünlerde granül yemle ve üçüncü gruplar ise 5 öğün granül yemle yemlenmişlerdir. Üçüncü periyodun sonunda bütün gruplarda granül yemle yemlemeye geçiş tamamlanmıştır. Çalışma sonunda, I. grup, çalışma sonunda ağırlık kazancı bakımından II. gruba nazaran genelde avantajlı bulunmuştur. Her iki grubun yemleme grupları arasında topluca yapılan değerlendirmede, I. grubun canlı yem grubu ile granül yem grubu benzer bulunurken, I. grubun karışık yemleme ve II. grubun tüm gruplarından daha avantajlı oldukları görülmüştür. II. grubundaki ağırlık kazancı yemleme gruplarında kendi aralarında benzer bulunmuştur (P

Keywords

• Kahverengi alabalık, Salmo trutta labrax, İlk yemleme, Yaşama oranı, Canlı yem, Granül alabalık yemi

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