Level dependence of distortion product otoacoustic emissions in the leopard frog, Rana pipiens pipiens

Histology of the oviduct of the leopard frog, Rana pipiens.

Two sex-linked loci in the leopard frog, Rana pipiens.

Crosses involving one heterozygous parent were performed to test the inheritance of enzymes in the leopard frog, Rana pipiens. After metamorphosis, offspring were sexed and tissue extracts from them were analyzed by gel electrophoresis. Enzyme genotype and sex showed independent assortment for 10 of 12 enzymes heterozygous in the male parent. However, among the offspring of males heterozygous f...

Redescription of the frog bladder fluke Gorgoderina attenuata from the northern leopard frog, Rana pipiens.

Morphological characters used to differentiate North American bladder flukes, Gorgoderina spp., are problematic and different authors use different morphological characteristics for distinguishing species. More importantly, no type specimens exist for 4 of the 12 North American species infecting anuran and caudatan hosts. A redescription of Gorgoderina attenuata (Stafford, 1902) Stafford, 1905 ...

Contribution of eye retraction to swallowing performance in the northern leopard frog, Rana pipiens.

Most anurans retract and close their eyes repeatedly during swallowing. Eye retraction may aid swallowing by helping to push food back toward the esophagus, but this hypothesis has never been tested. We used behavioral observations, cineradiography, electromyography and nerve transection experiments to evaluate the contribution of eye retraction to swallowing in the northern leopard frog, Rana ...

Effective population sizes and temporal stability of genetic structure in Rana pipiens, the northern leopard frog.

Although studies of population genetic structure are very common, whether genetic structure is stable over time has been assessed for very few taxa. The question of stability over time is particularly interesting for frogs because it is not clear to what extent frogs exist in dynamic metapopulations with frequent extinction and recolonization, or in stable patches at equilibrium between drift a...