Üç Farklı Sıcaklığa Alıştırılan Türk Kereviti (Astacus leptodactylus)’nin Sıcaklık Toleransı
15, 20 ve 25 °C’ye alıştırılan Türk kereviti için kritik termal maksima (CTMax) ve minima (CTMin) değerleri belirlenmiştir. CTMin ve CTMax değerleri sırasıyla 1,3, 1,1 ve 2,0 ile 37,4, 37,5 ve 38,7 °C’dir. Sıcaklık tolerans testleri alıştırma sıcaklıklarının (15, 20 ve 25 °C) A. leptodactylus CTMin değerlerine önemli etkilerde bulunduklarını göstermiştir (P≤0,05). Sıcaklık tolerans alanı CTMin ve CTMax sınırları ile değerlendirilerek 364°C2 olarak hesaplanmıştır. Genel olarak 15 ile 25 C arası alıştırma sıcaklıklarında, alıştırma tepki oranı (ARR) 0,07 ile 0,13 olarak hesaplananmıştır. Kerevitlerin tamamı 0,5 °C’de kıvrılma ve geneli 32,0- 33,0°C’de kasılma göstermiştir. Akdeniz bölgesinin güneydoğu kesiminde A. leptodactylus yetiştiriciliği sıcaklık toleransı açısından uygun olabilir.
Thermal Tolerance of Turkish Crayfish (Astacus leptodactylus) Acclimated to Three Different Temperatures
Critical thermal maxima (CTMax) and minima (CTMin) were determined forTurkish crayfish (Astacus leptodactylus) acclimated to 15, 20 and 25°C. CTMinand CTMax were 1.3, 1.1 and 2.0°C, and 37.4, 37.5 and 38.7°C, respectively.Thermal tolerance tests showed that acclimation temperatures (15, 20 and 25C)had significant effects on CTMin values of A. leptodactylus (P≤0.05). The area ofthermal tolerance assessed using the CTMin and CTMax boundaries werecalculated as 364°C2. The overall ARR values were calculated as 0.07 for CTMinand 0.13 for CTMax values between 15 and 25 C acclimation tempera-tures. Allthe crayfish crumpled at 0.5°C and showed overall spasm at 32.0 – 33.0°C.Farming A. leptodactylusin the southeastern part of the Mediterranean region maybe practiced in terms of temperature tolerance.
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