Conspecific and Heterospecific Pair-formation in Rana porosa brevipoda and Rana nigromaculata, with Reference to Asymmetric Hybridization.
نویسندگان
چکیده
منابع مشابه
Diflrerentiation f 70 Populations in the Rana nigromaculata Group by the Method of Electrophoretic Analyses
Seventeen kinds of enzymes and two kinds of blood proteins cxtracted from 1777 frogs of47 populations of Rana nigremacutata, 220 frogs of l2 populations ofR. brevipoda brevipodu and 340 frogs of 11 popuLations ef R. breviPoda Porosa were analyzed by the method ofhorizontal starch-gel electrophoresis. There were 7.6 phcnotypes produced by 4.1 alleles on the average at each of 28 leci. Thc gene f...
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Japan, that is, Honshu, Shikoku and Kyushu, Rana brevipoda brevipoda is fbund together with Rana nigromaculata in the Tokai and Kinki districts of Honshu and along the sheres ofthe eastern side of the Inland Sea. Rana brevipoda porosa occurs in the Kanto and Sendai plains and in most ofthe areas along the Shinano River. The fact that the two species are incompletely isolated reproductively from...
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In 1979, 2 species of pond frogs (Rana nigromaculata and Rana plancyi plancyi) were imported from China, and hybrids were made between these and Japanese, Korean, and Taiwanese pond frogs (R. nigromaculata, Rana plancyi fukienensis and Rana brevipoda) that had been kept for a number of years in the Laboratory for Amphibian Biology of Hiroshima University. From 1982, development of tumors, espec...
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هدف از این تحقیق بررسی برخی عوامل ادراکی واحساسی یعنی استفاده از شیوه های یادگیری زبان ، انگیزه ها ونگرش نسبت به زبان انگلیسی در رابطه با زمینه زبانی زبان آموزان می باشد. هدف بررسی این نکته بود که آیا اختلافی چشمگیر میان زبان آموزان دو زبانه و تک زبانه در میزان استفاده از شیوه های یادگیری زبان ، انگیزه ها نگرش و سطح مهارت زبانی وجود دارد. همچنین سعی شد تا بهترین و موثرترین عوامل پیش بینی کننده ...
15 صفحه اولEnhancement of twitch force by stretch in a nerve-skeletal muscle preparation of the frog Rana porosa brevipoda and the effects of temperature on it.
We investigated the mechanism of the enhancement of twitch force by stretch and the effects of temperature on it in nerve-skeletal muscle preparations of whole iliofibularis muscles isolated from the frog Rana brevipoda. When a preparation was stimulated indirectly and stretched, the twitch force after the stretch was enhanced remarkably in comparison to that observed before a stretch at low te...
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ژورنال
عنوان ژورنال: Current herpetology
سال: 2000
ISSN: 1881-1019,1345-5834
DOI: 10.5358/hsj.19.15