Embryonic development of the tree frog, Hyla arborea
Makaleler > Tam Makale · 2008
Yazarlar: Ferah SAYIM, Uğur KAYA
Biologia, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2008, cilt 63, ss 588-593
DOI: 10.2478/s11756-008-0086-z
Özet
A staged series with time data and original photographs of the embryonic development of the tree frog, Hyla arborea are presented, following Gosner's generalized table. To contribute to species specific embryological studies of anurans, the external features of development of this species were described. Duration of embryonic development, from fertilization to 25(th) stage, is about 9 days at 20 +/- 1 degrees C. Cleavage is holoblastic and unequal. Unlike the typical anuran development, neurular rotation was not observed in stage 15 or in any other stages. Other developmental stages resulted in a normal-looking. Embryos of H. arborea hatched at stage 20 or 21, which varied individually. Hatching occurred in the 4(th) or 5(th) day after fertilization. The mean total length of hatchlings was calculated as 6.38 mm. The mean size of ovum was estimated 1.4 mm in diameter.