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The “good genes” hypothesis predicts that mating preferences enable females to select mates of superior genetic quality. consequences the preference shown by female gray tree frogs for long-duration calls were evaluated comparing performance maternal half-siblings sired males with different call durations. Offspring male produced long showed better during larval and juvenile stages than did offspring short calls. These data suggest duration can function as a reliable indicator heritable

The most commonly heard vocalizations of frogs are advertisement calls, which attract gravid females and mediate aggressive interactions between males. Frog energetically costly to produce, body size often constrains the dominant frequency intensity vocalizations; propagation degradation these signals affected by diverse physical biotic factors. Behaviors auditory mechanisms that mitigate problems discussed. With some exceptions, female preferences based on intensity-dependent stabilizing...

Abstract Interactions between species can affect the evolution of their sexual signals, receiver selectivity, or both. One commonly expected outcome is reproductive character displacement, whereby adverse consequences mismating select for greater differentiation communication systems in areas sympatry than allopatry. We found evidence displacement acoustic system green tree frogs (Hyla cinerea). The strength female preferences spectral properties calls that distinguish conspecific from those...

SYNOPSIS. Playback experiments using synthetic sounds indicate that gravid females of the gray treefrogs (Hyla versicolor and H. chrysoscelis) green treefrog (H. cinerea) selectively respond to on basis physical properties show inter-individual variation in calls conspecific males. Although specificity is adequate differentiate among signals many males, this potential for mate choice may not be fully realized acoustically complex situations such as natural breeding aggregations. Female...

The gray tree frog mates over a temperature range of at least 9 degrees C. Gravid females, tested two different temperatures, preferred synthetic mating calls with temperature-dependent temporal properties similar to those produced by male about the same as their own. Thus, vocalization system and pattern recognition are affected in qualitatively fashion.

ABSTRACT Synthetic calls with a waveform periodicity of 300/sec and bimodal spectrum attracted female green treefrogs as effectively natural calls. Effectiveness was markedly reduced if the relative amplitude two spectral peaks differed by little 10 dB. Optimal frequency bands were 900-1100 Hz in low range 2700-3300 high. Addition components at 1800 2100 rendered call less attractive. In absence stimulus, most females responded to containing single peak high or range. Mating recognition...

Preference functions, which quantify preference strength relative to variation in male traits or signals, are central understanding mechanisms and consequences of female choice. Female tree frogs (Hyla versicolor) choose mates on the basis advertisement calls prefer long short calls. Here we show, two experimental designs, that increased significantly as difference call duration was only if absolute durations alternative stimuli were below average. Hence a non-linear function duration,...

Individuals of many territorial species discriminate between familiar neighbors and unfamiliar strangers based on individual differences in acoustic signals. Many anuran amphibians are use primarily communication during social interactions, but evidence for acoustically mediated discrimination is available only one species. As a first step research designed to investigate second frog, we examined patterns within‐male among‐male variability 198 advertisement calls 20 male green frogs, Rana...

We assessed the potential for several acoustic properties of advertisement calls male gray tree frogs to affect relative mating success by relating patterns variation in these minimum differences required elicit female choice. Dynamic (pulse number, PN; call rate, CR; and duty cycle, DC, ratio duration period) varied much more within bouts calling than a static property (dominant frequency, DF) but nevertheless exhibited significant between three four breeding seasons. Many multiply recorded...

Speciation by polyploidy is rare in animals, yet, vertebrates, there a disproportionate concentration of polyploid species anuran amphibians. Sequences from the cytochrome b gene mitochondrial DNA (mtDNA) were used to determine phylogenetic relationships among 37 populations diploid-tetraploid pair gray treefrogs, Hyla chrysoscelis and versicolor. The diploid species, H. chrysoscelis, consists an eastern western lineage that have 2.3% sequence divergence between them. tetraploid versicolor,...

Noncalling adult male tree frogs were found in close association with about 16 percent of the calling males a pond Georgia. In 13 30 field experiments noncalling satellite intercepted and achieved amplexus gravid female moving toward male. This mating strategy, which conserves energy required for calling, resembles strategy employed by other vertebrates.

The reproductive behavior of two broadly sympatric, interfertile treefrogs, Hyla cinerea and gratiosa, was studied. Field observations corroborated the conclusions a previous study (Mecham, 1960) regarding incompleteness ecological temporal isolation significance species difference in calling position. Both have more than one kind call but discrimination experiments showed that each species, is most important as mate attractant. In single-stimulus some females both responded to calls other...