Substrat seçiminin mavi kaplan kerevitlerinde (Cherax albertisii) büyüme ve yaşama oranı üzerine etkileri

Bu çalışmada, farklı türde substratların mavi kaplan kerevitlerinde (Cherax albertisii) büyüme, yaşama oranı ve substrat seçimi üzerine etkileri araştırılmıştır. 6 farklı substrat (boş cam, sinek teli, bazalt, kalsit, çakıl, kum) 18 adet akvaryumun zeminine yerleştirilmiştir. Çalışma 2 farklı deney ortamında sürdürülmüştür. İlk deneyde her bir akvaryuma ortalama 1 g ağırlığında 10 adet birey konulmuştur. İkinci deneyde, substrat tercihi için tabanından 6 bölüme ayrılmış ve her bir bölümde aynı substratların bulunduğu altıgen bir akvaryum kullanılmıştır. İlk deneyden 1 aylık 10 adet kerevit bireysel olarak altıgen tanka yerleştirilmiş ve hareketlerini gözlemlemek için 24 saat boyunca her bölümde geçirdikleri süreler kaydedilmiştir. İlk deneyin sonucu olarak, 120 günün sonunda çakıl substratındaki bireylerin ağırlıklarında istatistiksel farklılık saptanmıştır (P

Effects of substrate preference on growth and survival of blue tiger crayfish (Cherax albertisii)

This study investigated the effects of different type of substrates on the growth, survival and substrate preference on juvenile blue tiger crayfish (Cherax albertisii). Six different substrates (bare glass, plastic mesh, basalt, calcite, pebbles, sand) have established in the bottom of 18 aquariums. The study was carried out in two different experimental areas. In the first set of experiments, ten (average 1 g of body weight) juveniles were placed in each aquariums. In the second experiment, a hexagonal glass aquarium were used and divided into six sections each containing one of the same substrates were used for substrate preference. Ten juveniles from the first experiment were individually placed into the aquarium and each of them were recorded at convenient intervals for 24 hours for observing their behaviours. Spending time in each section was recorded. As a result of the first experiment, it was found that weight gain of crayfish was significantly higher on group of pebbles in comparison with the other substrates after 120 days (P

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