A comparative study on the secretory activity of the subcommissural organ in the European green frogs: Rana esculenta, rana lessonae and Rana ridibunda
نویسندگان
چکیده
منابع مشابه
Male 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 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 کاملOverwinter 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 کاملNew 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 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...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Comparative Biochemistry and Physiology Part A: Physiology
سال: 1980
ISSN: 0300-9629
DOI: 10.1016/0300-9629(80)90004-3