OVERWINTER SURVIVAL OF RANA LESSONAE AND ITS HEMICLONAL ASSOCIATE RANA ESCULENTA
نویسندگان
چکیده
منابع مشابه
Overwinter survival of Rana lessonae and its hemiclonal associate Rana esculenta
In central Europe, the hybridogenetic water frog Rana esculenta is a sexual parasite that only persists in the presence of the parental species, R. lessonae, with which it must mate in order to reproduce. R. esculenta is a superior larval competitor, and adult females are about three times more fecund than R. lessonae. This suggests that, in the absence of some balancing advantage to R. lessona...
متن کاملLarval Development and Recruitment of Juveniles in a Natural Population of Rana lessonae and Rana esculenta
In most parts of central Europe the hybridogenetic water frog Rana esculenta lives (and mates) in mixed populations with its parental species Rana lessonae. Ratios of parental and hybrid animals vary from 1:9 to 9:1 among ponds, depending on various biotic and abiotic factors. These factors may directly cause the ratio differences through species-specific effects on larval performance, but prev...
متن کاملMale vocalization and female choice in the hybridogenetic Rana lessonae/Rana esculenta complex.
In many species, females can improve their fitness by preferring particular males over others. In Palaearctic water frogs of the Rana lessonae/R. esculenta complex the consequences of such mate choice are particularly pronounced. To produce viable offspring, the hybrid R. esculenta (genotype RL) must mate with the parental species R. lessonae (LL); but R. lessonae should avoid mating with R. es...
متن کاملGenome reduction in a hemiclonal frog Rana esculenta from radioactively contaminated areas.
A decrease in genome size was found in the hemiclonal hybridogenetic frog Rana esculenta (R. ridibunda x R. lessonae) from areas of radioactive contamination that resulted from the Chernobyl fallout. This genome reduction was of up to 4% and correlated with the background level of gamma-radiation (linear regression corresponded on average to -0.4% per doubling of radiation level). No change in ...
متن کاملVestibulotrigeminal pathways in the frog, Rana esculenta.
The aim of this study was to investigate whether primary vestibular afferent fibers establish direct connections with the motor and sensory trigeminal system in the brainstem of the frog. The experiments were carried out on Rana esculenta. In anaesthetized animals the trigeminal and vestibular nerves were prepared, and their proximal stumps were labeled either with fluorescein binding dextran a...
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ژورنال
عنوان ژورنال: Ecology
سال: 2003
ISSN: 0012-9658
DOI: 10.1890/0012-9658(2003)084[0391:osorla]2.0.co;2