Advertisement calls of the cricket frog, Acris crepitans, show statistically significant variation among populations in all call variables measured. Call strong clinal resulting lower frequency, longer duration and slower rates produced by A. c. blanchardi open habitat west range, higher shorter faster crepitans pine forests eastern part range. This does not result from pleiotropic effects body size or any other morphological characters we The two subspecies usually reside different...

Abstract Afferents to the dorsal and ventral striatum of bullfrog (Rana catesbeiana) were revealed by horseradish peroxidase (HRP) histochemistry. Anterograde tracing techniques (autoradiography anterograde HRP transport) then used confirm projections describe their terminal fields within striatum. The major input arises from ipsi‐lateral lateral anterior central thalamic nuclei, which receive tectal (Rubinson, ′68) toral (Neary, ′74) input, respectively. These terminate in a dense,...

Abstract Autoradiographic and degeneration techniques were used to describe striatal efferents in the bullfrog (Rana catesbeiana) . Horseradish peroxidase (HRP) was then placed major terminal fields reveal cells responsible for these projections. Except small ventral eminence of lateral pallium immediately adjacent dorsal striatum, no pallial region receives a projection. Most descend forebrain bundle (LFB), passing through anterior entopedun‐cular nucleus, where one large fascicle...

We examined frequency tuning of the female's peripheral auditory system, dominant male's mating call, and population-based preferences in cricket frogs (Acris crepitans) to determine how relationship between mean call sensitivity system determines such preferences. Females could exhibit for either local calls or foreign calls. In all instances which there was a preference, females preferred lower-frequency calls, regardless whether they were foreign. These patterns female preference are...

Abstract Horseradish peroxidase (HRP) histochemistry was used to visualize cells afferent the bullfrog torus semicircularis. These are located in several sensory and nonsensory nuclei. The structures which project mainly auditory nuclei, with major input coming from ipsilateral superior olive. A very small contralateral projection is also present. In addition, afferents arise contralateral, a lesser extent ipsilateral, dorsal acoustic nucleus caudalis, both primary eighth nerve vestibular...

In species within the <i>Physalaemus pustulosus </i>species group, male frogs produce a whine-like advertisement call consisting of frequency sweep typically descending from 1,000 to 400 Hz (depending on species). One species, pustulosus</i>, túngara frog, has evolved second syllable, chuck, which males place after their whine. Most energy in chuck is above 1,500 and peaks at 2,400 Hz. We investigated whether evolution this new component <i>P. pustulosus</i>...

We investigated the relationships among spectral and temporal advertisement-call characteristics sizes of laryngeal ear components thought to underlie generation reception species-specific vocalizations in male cricket frogs (Acris crepitans). tested predictions that volumes structural elements necessary for acoustic communication would be correlated with various parameters vocalizations. The anatomy structures was reconstructed from serial sections heads two subspecies collected several...

We examined patterns of neural activity as assayed by changes in gene expression to localize representation acoustic mating signals the auditory midbrain frogs. exposed wild-caught male Physalaemus pustulosus conspecific calls that vary their behavioral salience, nonsalient calls, or no sound. measured immediate early egr-1 (also called ZENK, zif 268, NGFI -A, and krox -24) throughout torus semicircularis, homolog inferior colliculus. Differential induction response stimuli occurred laminar,...

The tungara frog has an advertisement call with two structurally and functionally distinct components: the whine is both necessary sufficient for species recognition, addition of chucks further enhances attractiveness. Only fundamental frequency contributes to phonotaxis; upper harmonics play no role. Furthermore, only a small portion whine, within first 0–100 msec, elicit there some redundancy since either 0–50 msec or 50–100 elicits response. Most remainder whine's amphibian papilla in...

We determined how social stimuli that vary in behavioral relevance differentially activate functional networks the frog hypothalamus. As measured by egr-1 mRNA levels, activity three hypothalamic nuclei varied with acoustic stimulus, and these responses were correlated different auditory regions regardless of stimulus. The correlations among nuclei, however, as a function stimuli. Thus relevant cues shift connectivity within hypothalamus, consistent principles underlie simultaneous...