Results 251 to 260 of about 162,085 (282)

Spawning Date of the Common Frog

Nature, 1934
IN a former communication1 I announced certain conclusions on the effect of the weather upon the spawning date of the common frog, Rana temporaries. Since then, a number of new facts have come to light.
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Handbook of Common New Guinea Frogs

Copeia, 1977
Handbook of common New Guinea frogs , Handbook of common New Guinea frogs , مرکز فناوری اطلاعات و اطلاع رسانی ...
M. J. Littlejohn, J. I. Menzies
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The Common Frog Rana temporaria

1991
The oocytes, embryos, and larvae of Rana temporaria have long been traditional subjects of diverse experimental embryological studies. Experimental embryologists have often used the embryos of R. temporaria for studies concerning the mechanisms of development. In the first half of this century experiments were carried out on eggs collected from natural
N. V. Dabagyan, L. A. Sleptsova
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Refrigerated storage of European common frog Rana temporaria oocytes

Cryobiology, 2018
Reproduction technologies (RTs) for the storage and use of amphibian gametes have rapidly developed since the recognition of the amphibian conservation crisis in the late 20th Century. Of these RTs, the refrigerated storage of oocytes and sperm can help to achieve reliable pair-matching when unexpected deaths could lead to critical gaps in studbook ...
Victor K. Uteshev, Edith N. Gakhova, Ludmila I. Kramarova, Natalia V. Shishova, Svetlana A. Kaurova, Robert K. Browne   +5 more
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Photoprotection in tadpoles of the common frog, Rana temporaria

Journal of Photochemistry and Photobiology B: Biology, 2000
The common frog, Rana temporaria, spawning at altitudes up to 2600 m, is potentially threatened by UVB radiation. In laboratory experiments we found a specifically UVB absorbing substance (UVAS) in the skin of tadpoles with maximum absorption between 290 and 300 nm. The production of UVAS is induced by both visible light and ultraviolet radiation.
R, Hofer, C, Mokri
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Female‐biased sex ratios in subarctic common frogs

Journal of Zoology, 2008
AbstractIn vertebrates with genetic sex determination, large deviations from the 1:1 sex ratio at the population level are rare and demand an explanation. We investigated adult sex‐ratio variation of common frogs Rana temporaria in two subarctic breeding ponds over a 6‐year (1999–2004) period using capture–mark–recapture (CMR) methods.
J. S. Alho, G. Herczeg, J. Merilä
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Some common names for Top End frogs

Northern Territory Naturalist, 2007
Animals that are noticed because they are abundant or readily observed tend to acquire common names, and for many people these names are easier to remember than Latin (scientific) names. Fauna with specific, easily recognisable or distinguishing features also frequently have common names.
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On the Development of the Common Frog.

1884
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Arthropod–Frog Connection: Decahydroquinoline and Pyrrolizidine Alkaloids Common to Microsympatric Myrmicine Ants and Dendrobatid Frogs

Journal of Chemical Ecology, 2000
Neotropical poison frogs (Dendrobatidae) contain a wide variety of lipophilic alkaloids, apparently accumulated unchanged into skin glands from dietary sources. Panamanian poison frogs (Dendrobates auratus) raised in a large, screened, outdoor cage and provided for six months with leaf-litter from the frog's natural habitat, accumulated a variety of ...
John W. Daly, H. Martin Garraffo, Poonam Jain, Thomas F. Spande, Roy R. Snelling, César Jaramillo, A. Stanley Rand   +6 more
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Food Habits and Molting of the Common Tree Frog

American Midland Naturalist, 1944
The cage used in the early observation was a gallon salad dressing jar with cheese cloth over the top held in place with rubber bands. Moistened sand was placed on the bottom of the cage to a depth of half an inch. A limb from a tree about an inch in diameter was placed diagonally from the bottom on one side to the top on the opposite side of the jar ...
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