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Farklı Protein Seviyelerindeki Dietlerinin Yavru Tatlı Su Kerevitlerinin (Astacus leptodactylus Eschscholtz, 1823) Büyüme, Yaşama Oranları ve Vücut Kompozisyonları Üzerine Etkileri

The Effects of Diets with Different Protein Levels on Growth, Survival and Body Composition of Juvenile Freshwater Crayfish (Astacus leptodactylus Eschscholtz, 1823)

Journal Name:

  • Süleyman Demirel University Journal of Eğirdir Fisheries Faculty

Publication Year:

  • 2010

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
The effect of three different dietary protein contents were evaluated on growth, survival and body composition of newly hatched third instars Astacus leptodactylus juvenile and to determine food preference for intensive culture system of this species. The experiment consists of three treatments (diets). The diets were: 1) commercial trout feed consist of 55% protein (CTF), 2) commercial carp feed consist of 35% protein (CCF) and 3) fresh fish meat consist of 18% protein (FFM). Thirty newly hatched third instarts of Astacus leptodactylus (mean weight 44.5 ± 3.4 mg and mean total length 10.8 ± 0.4 mm) were randomly stocked in nine aquariums in 25 L (area: 0.2 m2), for 90 days at 28oC. The experimental desing was conducted 3 treatment and with 3 replicates. The result of experiment indicated that final weight and length varied among diet groups were 0.38 ± 0.03 g, 0.30 ± 0.04 g, 0.32 ± 0.04 g and 29.41 ± 0.5 mm, 27.43 ± 0.4 mm, 27.93 ± 0.6 mm respectively. The highest mean growth was observed from the group of crayfish feed CTF. The survival of crayfish was similar for three diets. The highest survival rate 81.85% was observed in FFM. The highest specific growth rate (SGR) in CTF (0.01/d) was obtained at the end of the experiment. Feed conversion rates were found similar for all treatment groups, wherease molting frequencies were different among the diets (P<0.05). The highest molting frequency were observed in CTF and followed by FFM and CCF feeding groups, respectively. At the end of the feeding period, protein, hepatopancreas moisture, and lipid values were found similar for all of the experimental groups (P>0.05). The results indicated that CTF alone could provide better growth, molting frequency, and yield in comparison to other diet groups, but survival was the in FFM diet group.
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Abstract (Original Language): 
Farklı protein seviyelerindeki diyetlerin yavru tatlı su kerevitlerinin (A. leptodactylus) büyüme, yaşama oranları ve vücut kompozisyonları üzerine etkileri incelenmiştir. Denemede kullanılan muamele grupları; Ticari alabalık yemi ile beslenen kerevitler (TAK), Sazan yemi ile beslenen kerevitler (SYK) ve Kıyma balık eti (sardalye kıyması) ile beslenen kerevitler (KBK)'dir. Üçüncü evredeki Astacus leptodactylus yavrularının başlangıç ortalama uzunlukları sırasıyla 44.5 ± 3.4 mg ve 10.8 ± 0.4 mm olarak ölçülmüştür. Çalışmada üç farklı protein seviyesindeki diyetler, stok yoğunlukları 150 /m2 adet kerevit, 0.2 m2 lik akvaryumlara 30'ar adet olacak şekilde rastgele 9 akvaryuma stoklanmıştır. Deneme tesadüf parselleri deneme planına göre üç tekerrürlü olarak 90 gün sürmüştür. Deneme sonunda, farklı protein seviyelerindeki diyetlerle ile beslenen yavru tatlı su kerevitlerinin deneme sonunda ulaştıkları son ağırlık ortalamaları 0.38 ± 0.03, 0.30 ± 0.04 ve 0.32 ± 0.04 g arasında ve ortalama uzunluk ölçüleri ise 29.41 ± 0.5, 27.43 ± 0.4 ve 27.93 ± 0.6 mm arasında değişmiştir. Deneme sonunda, en iyi büyüme (hem ağırlıkça hem de boyca) alabalık yemi ile beslenen grupta, en yüksek yaşama oranı ise balık eti ile beslenen grupta (%81.85) görülmüştür. Deneme sonunda, en yüksek spesifik büyüme oranı (0.01mm/gün'lük) değeriyle alabalık yemi ile beslenen grupta gözlenmiştir. Yem değerlendirme oranları muamele grupları arasında farklı bulunmamıştır (P>0.05). Kabuk değişim sıklığı muamele grupları arasında farklı bulunmuştur (P<0.05). En yüksek kabuk değişim sıklığı alabalık yemiyle beslenen grupta %74.4 olarak bulunmuş, bunu sırasıyla balık eti ile beslenen grup % 66.7 ve sazan yemi ile beslenen grup % 52.2 olarak izlemiştir. Protein, yağ ve nem içeriklerinin muamele grupları arasında istatistiki olarak farklı olmadığı gözlenmiştir (P>0.05). Bunun yanı sıra hepatopankreas nem miktarının (%) da muamele grupları arasında istatistiki olarak farklı olmadığı saptanmıştır (P>0.05).
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Farklı
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Büyüme,Yaşama Oranları ve Vücut Kompozisyonları Üzerine Etkileri
GÜNER, MAZLUM
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Farklı
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Tatlı Su Kerevitlerinin (Astacus leptodactylus Eschscholtz, 1823)
Büyüme,Yaşama Oranları ve Vücut Kompozisyonları Üzerine Etkileri
GÜNER, MAZLUM
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