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Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus leptodactylus (Esch., 1823) Eggs

Yıl 2004, Cilt: 4 Sayı: 2, - , 01.04.2004

Hamdi Aydın M. Kamil Dilek

Öz

In this study, freshwater crayfish (Astacus leptodactylus, Esch, 1823) eggs were incubated starting seven weeks after spawning, at three different temperatures (11.8 ºC, 16±1ºC and 20±1 ºC) and the results were compared with respect to º hatching time and survival rate. The eggs hatched between days 116 and 125, 88 and 97, and 69 and 74, at 11.8 ºC, 16 ±1 ºC, and 20 ±1 ºC, respectively. The survival rates at these temperatures were 22.4%, 46.9% and 32.5%. In conclusion, it was found that A. leptodactylus eggs could hatch 1.5 months earlier than under natural conditions by increasing water temperature, starting in March, up to 20 ºC, but the optimum temperature for maximum hatching rate was found to be around 16 ºC.

Anahtar Kelimeler

Freshwater crayfish Astacus leptodactylus hatching time survival rate water temperature

Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus leptodactylus (Esch., 1823) Eggs

Yıl 2004, Cilt: 4 Sayı: 2, - , 01.04.2004

Hamdi Aydın M. Kamil Dilek

Öz

In this study, freshwater crayfish (Astacus leptodactylus, Esch, 1823) eggs were incubated starting seven weeks after spawning, at three different temperatures (11.8 ºC, 16±1ºC and 20±1 ºC) and the results were compared with respect to º hatching time and survival rate. The eggs hatched between days 116 and 125, 88 and 97, and 69 and 74, at 11.8 ºC, 16 ±1 ºC, and 20 ±1 ºC, respectively. The survival rates at these temperatures were 22.4%, 46.9% and 32.5%. In conclusion, it was found that A. leptodactylus eggs could hatch 1.5 months earlier than under natural conditions by increasing water temperature, starting in March, up to 20 ºC, but the optimum temperature for maximum hatching rate was found to be around 16 ºC.

Anahtar Kelimeler

Freshwater crayfish Astacus leptodactylus hatching time survival rate water temperature

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Ayrıntılar

Birincil Dil Türkçe
Bölüm Makaleler
Yazarlar

Hamdi Aydın Bu kişi benim

M. Kamil Dilek Bu kişi benim

Yayımlanma Tarihi 1 Nisan 2004
Yayımlandığı Sayı Yıl 2004 Cilt: 4 Sayı: 2

Kaynak Göster

APA Aydın, H., & Dilek, M. K. (2004). Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus leptodactylus (Esch., 1823) Eggs. Turkish Journal of Fisheries and Aquatic Sciences, 4(2).
AMA Aydın H, Dilek MK. Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus leptodactylus (Esch., 1823) Eggs. Turkish Journal of Fisheries and Aquatic Sciences. Nisan 2004;4(2).
Chicago Aydın, Hamdi, ve M. Kamil Dilek. “Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus Leptodactylus (Esch., 1823) Eggs”. Turkish Journal of Fisheries and Aquatic Sciences 4, sy. 2 (Nisan 2004).
EndNote Aydın H, Dilek MK (01 Nisan 2004) Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus leptodactylus (Esch., 1823) Eggs. Turkish Journal of Fisheries and Aquatic Sciences 4 2
IEEE H. Aydın ve M. K. Dilek, “Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus leptodactylus (Esch., 1823) Eggs”, Turkish Journal of Fisheries and Aquatic Sciences, c. 4, sy. 2, 2004.
ISNAD Aydın, Hamdi - Dilek, M. Kamil. “Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus Leptodactylus (Esch., 1823) Eggs”. Turkish Journal of Fisheries and Aquatic Sciences 4/2 (Nisan 2004).
JAMA Aydın H, Dilek MK. Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus leptodactylus (Esch., 1823) Eggs. Turkish Journal of Fisheries and Aquatic Sciences. 2004;4.
MLA Aydın, Hamdi ve M. Kamil Dilek. “Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus Leptodactylus (Esch., 1823) Eggs”. Turkish Journal of Fisheries and Aquatic Sciences, c. 4, sy. 2, 2004.
Vancouver Aydın H, Dilek MK. Effects of Different Water Temperatures on the Hatching Time and Survival Rates of the Freshwater Crayfish Astacus leptodactylus (Esch., 1823) Eggs. Turkish Journal of Fisheries and Aquatic Sciences. 2004;4(2).