electrical activity of the olfactory structures in connection with the thermal environment in a tropical frog, rana occipitalis. 19724404367
[effect of the saccule on postrotatory vestibular reactions in the frog (rana occipitalis)]. 19744282045
[influence of the saccule in vestibular tilting reaction in frogs (rana occipitalis)].in blinded frogs we have cut the saccular nerve on both sides. this results in decreasing the amplitude of the tilting reactions (which are elicited by stimulation of the utriculi). the saccular facilitation of tilting reactions is more or less great according to the frogs.1975126731
choice of optimal oviposition sites by hoplobatrachus occipitalis (anura: ranidae) in an unpredictable and patchy environment.the rock pools on the river bank of the comoé national park (west africa) provide a very diverse and unpredictable environment for anuran larval development. because rock pools differ considerably in biotic and abiotic parameters, it should be adaptive for reproducing anurans to choose the most suitable oviposition sites. during the beginning of each rainy season (march to may), from 1991 to 1995, we investigated the allocation of breeding sites by hoplobatrachus occipitalis, counted the number ...199728307169
the development and fine structure of lankesterella cf. dicroglossi (apicomplexa: lankesterellidae) infecting frogs in niger, west of four hoplobatrachus occipitalis (günther, 1859) frogs received from niger, west africa was heavily infected with lankesterella blood and pre-erythrocytic stages. infected blood and tissues from this frog were force-fed to the remaining three frogs. two survived to necropsy on days 14 and 27 post-feeding and were found to be infected with gamogonic and oogonic stages, respectively. the source of infection is inconclusive, as a natural origin cannot be excluded. microgamont, macrogamont, oo ...200111699652
the effects of physicochemical variables and tadpole assemblages on microalgal communities in freshwater temporary ponds through an experimental freshwater systems, microalgae are the major biomass of microorganisms. they occur in ecosystems that are largely structured by the climatic regime, the physical and chemical environments with which they interact, and the biological interactions that occur within them. amphibian larvae are most present in standing water habitats where they are important primary and secondary consumers and even predators. studies conducted in america and europe have shown that tadpoles play an important role i ...201525694810
purification, conformational analysis, and properties of a family of tigerinin peptides from skin secretions of the crowned bullfrog hoplobatrachus occipitalis.four host-defense peptides belonging to the tigerinin family (tigerinin-1o: rictpipfpmcy; tigerinin-2o: rtcipiplvmc; tigerinin-3o: rictaiplpmcl; and tigerinin-4o: rtcipippvcf) were isolated from skin secretions of the african crowned bullfrog hoplobatrachus occipitalis. in aqueous solution at ph 4.8, the cyclic domain of tigerinin-2o adopts a rigid amphipathic conformation that incorporates a flexible n-terminal tail. the tigerinins lacked antimicrobial (mic > 100 μm) and hemolytic (lc50 > 500 μ ...201627560386
west africa - a safe haven for frogs? a sub-continental assessment of the chytrid fungus (batrachochytrium dendrobatidis).a putative driver of global amphibian decline is the panzootic chytrid fungus batrachochytrium dendrobatidis (bd). while bd has been documented across continental africa, its distribution in west africa remains ambiguous. we tested 793 west african amphibians (one caecilian and 61 anuran species) for the presence of bd. the samples originated from seven west african countries - bénin, burkina faso, côte d'ivoire, ghana, guinea, liberia, sierra leone - and were collected from a variety of habitat ...201323426141
genetic divergence and evolutionary relationships in six species of genera hoplobatrachus and euphlyctis (amphibia: anura) from bangladesh and other asian countries revealed by mitochondrial gene elucidate the species composition, genetic divergence, evolutionary relationships, and divergence time of hoplobatrachus and euphlyctis frogs (subfamily dicroglossinae, family ranidae) in bangladesh and other asian countries, we analyzed the mitochondrial cyt b, 12s, and 16s rrna genes of 252 specimens. our phylogenetic analyses showed 13 major clades corresponding to several cryptic species as well as to nominal species in the two genera. the results suggested monophyly of asian hoplobatrach ...200818513995
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