COMPARISONS OF THE CLIMATES OF THE TWO HABITATS OF HAMILTON'S FROG (LEIOPELMA HAMILTONI (McCULLOCH))

نویسندگان

  • D. G. NEWMAN
  • I. G. CROOK
چکیده

Comparisons of climate data from the two known habitats of Leiopelma hamiltoni (a small deforested rock tumble near the summit of Stephens Island called the "frog bank" and a forest remnant on Maud Island) show that the two are remarkably similar, apart from greater extremes of temperature and humidity occurring at the open rock surface of the frog bank than on the surface of the Maud Island habitat. Furthermore, the air space between the rocks of the frog bank is significantly cooler, more humid and subject to less temperature fluctuation than the surface. The frogs, being nocturnal, shelter under these rocks during the day. This habit and the climate of the frog bank are the major factors permitting the survival of the frog on Stephens Island since the frog bank lost its forest cover. Climate data from a nearby remnant of the original forest suggest that the Stephens Island habitat would have been more suitable for frogs in its original forested form than in its present state. Although grasses and Muehlenbeckia vines are encroaching onto the frog bank and creating a more favourable micro-climate at the habitat's surface, such cover may eventually restrict the access of frogs to sheltering rock crevices.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

New records of trematode parasites (digenea) in the banded frog (Rana camerani) and marsh frog (Rana ridibunda ridibunda) (Anura: Ranidae), from southwest of Iran

Fourteen adult frogs including six banded frog, Rana camerani and eight marsh frog, Rana ridibunda ridibunda were collected from two sites of Chahar Mahal-o-Bakhtiari province at the southwest of Iran and then were examined for helminth parasites. Only Dolichosaccus rastellus  (50%) was found in R. camerani, Skrjabinoeces similis (50%) and metacercarian cysts of Codonocephalus urniger (12....

متن کامل

New records of trematode parasites (digenea) in the banded frog (Rana camerani) and marsh frog (Rana ridibunda ridibunda) (Anura: Ranidae), from southwest of Iran

Fourteen adult frogs including six banded frog, Rana camerani and eight marsh frog, Rana ridibunda ridibunda were collected from two sites of Chahar Mahal-o-Bakhtiari province at the southwest of Iran and then were examined for helminth parasites. Only Dolichosaccus rastellus  (50%) was found in R. camerani, Skrjabinoeces similis (50%) and metacercarian cysts of Codonocephalus urniger (12.5%) w...

متن کامل

Newman: Predation of Hamilton's Frog by Tuatara

Based on a single observation some evidence is presented suggesting that predation of Hamilton's frog by tuatara is occurring on Stephens Island, 40<> 40' S, 174 <>00' E in Cook Strait, Bones of the left hind limb of a frog were identified from a tuatara dropping collected from the frogs' habitat. Because of the tenuous state of the island's frog population, factors thought to limit the inciden...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1978