Organ Metabolism and Cryoprotectant Synthesis during Freezing in Spring Peepers Pseudacris crucifer

Copeia ◽  
1996 ◽  
Vol 1996 (3) ◽  
pp. 517 ◽  
Author(s):  
Thomas A. Churchill ◽  
Kenneth B. Storey
Keyword(s):  
Pseudacris Crucifer ◽  
Cryoprotectant Synthesis

Not just a peep: The evolution of calling in Pseudacris crucifer

2018 ◽  
Author(s):  
Amanda Cicchino
Keyword(s):  
Reproductive Isolation ◽  
Full Range ◽  
Mate Recognition ◽  
Preliminary Evidence ◽  
Biological Species ◽  
Biological Species Concept ◽  
Incipient Species ◽  
Pseudacris Crucifer ◽  
Full Analysis ◽  
American Frog

Reproductive isolation is the hallmark of speciation as defined by the biological species concept. A species that is evolving towards reproductive isolation, but has not reached full isolation, is defined as an incipient species. One mechanism used by incipient species to further drive speciation is the use of mate recognition signals. The spring peeper, Pseudacris crucifer, is a North American frog that can be classified as an incipient species, as previous studies have found 6 distinct mitochondrial lineages within its range. Spring peepers use vocal signals for mate recognition and exhibit a female choice mating system where the males call to attract females. This study investigates the evolution of calling in spring peepers. Using calls from each lineage across the full range of spring peepers, I analyzed 11 different characteristics to determine whether the calls were different, and if so, which characteristics are being selected for. Preliminary evidence suggests that the calls between the lineages are distinct and that certain characteristics of the call are more heavily selected for than others. Full analysis on the data has not been completed at this time. This study will expand the understanding of the evolution of spring peepers, as well as offer insight into the role of mating systems on reproductive isolation.

Predation on Hyla versicolor and Pseudacris crucifer during Reproduction

1990 ◽  
Vol 24 (2) ◽  
pp. 196 ◽  
Author(s):  
Steven H. Hinshaw ◽  
Brian K. Sullivan
Keyword(s):  
Hyla Versicolor ◽  
Pseudacris Crucifer

Habitat fragmentation and the distribution of amphibians: patch and landscape correlates in farmland

1999 ◽  
Vol 77 (8) ◽  
pp. 1288-1299 ◽  
Author(s):  
Mary B Kolozsvary ◽  
Robert K Swihart
Keyword(s):  
Plethodon Cinereus ◽  
Hyla Versicolor ◽  
Pitfall Traps ◽  
Bufo Americanus ◽  
Forest Patches ◽  
Forest Patch ◽  
Pseudacris Crucifer ◽  
Chorus Frogs ◽  
Nonrandom Distribution ◽  
Landscape Level

We studied the effects of agriculturally induced fragmentation of forests and wetlands on amphibian assemblages and their distribution in a landscape of the midwestern United States. Potential breeding pools and upland areas in 30 forest patches of various sizes and degrees of isolation were intensively sampled for amphibians during April through August 1996 and March through August 1997 in Indiana. Species presence was documented using pitfall traps, anuran vocalization surveys, and cover-board sampling for adults and minnow traps and dip nets for larvae. Amphibian, anuran, and salamander assemblages were nonrandomly distributed across the landscape. American toads (Bufo americanus) and gray treefrogs (Hyla versicolor) were ubiquitous, whereas the distributions of several other species were ordered in a predictable manner. Logistic regression was used to develop predictive models of probabilities of occurrence for species in response to forest and wetland patch and landscape variables. Occurrence of redback salamanders (Plethodon cinereus) was positively associated with the area of a forest patch. Occurrence of ranid frogs was positively associated with proximity of wetlands for three of four species, and occurrences of smallmouth salamanders (Ambystoma texanum), spring peepers (Pseudacris crucifer), and western chorus frogs (Pseudacris triseriata) were related to the degree of wetland permanency. Multiple linear regression revealed that species richness was greatest for wetlands with intermediate degrees of permanency. The observed nonrandom distribution exhibited by several amphibians suggests that they respond to landscape-level attributes. Moreover, species differed substantially in the nature of their responses to fragmentation, consistent with differences in their life history and ecology.

Plasticity of aggressive signalling and its evolution in male spring peepers, Pseudacris crucifer

2003 ◽  
Vol 65 (6) ◽  
pp. 1223-1234 ◽  
Author(s):  
Vincent T Marshall ◽  
Sarah C Humfeld ◽  
Mark A Bee
Keyword(s):  
Pseudacris Crucifer

The Significance of Persistent Vocalisation By the Spring Peeper, Pseudacris Crucifer (Anura: Hylidae)

Behaviour ◽  
1989 ◽  
Vol 108 (3-4) ◽  
pp. 197-208 ◽  
Author(s):  
David V. Lykens ◽  
Don C. Forester ◽  
W. Keith Harrison
Keyword(s):  
Body Size ◽  
Mating Success ◽  
Significant Variation ◽  
Random Mating ◽  
Weather Conditions ◽  
Size Class ◽  
Reproductive Season ◽  
Mating Activity ◽  
Good Physical Condition ◽  
Pseudacris Crucifer

Abstract1. Male spring peepers exhibit individual variation in calling persistence within as well as between nights. 2. Weather conditions influence nightly variation in calling persistence throughout the reproductive season, but there is a pronounced decrease in calling persistence late in the season which appears to be independent of climate. 3. In four speaker experiments simulating males calling 20, 40, 60, and 80% of the time, there is a positive correlation between time spent calling and mating success. 4. On nights when there is significant variation in calling persistence, females likely respond to those males which are most persistent (i.e. , produce the most conspicuous calls). 5. In four speaker experiments simulating males calling 80, 85, 90 and 95% of the time, mating success is random, suggesting that during periods of peak mating activity the importance of female choice is diminished. 6. Calling persistence is not correlated with body size, therefore males of any age or size class have an opportunity to experience mating success. 7. Anuran vocalization is known to be energetically expensive, and persistent callers (regardless of their size) are likely in good physical condition. 8. We suggest that by responding (either actively or passively) to the most conspicuous calls, females convey to their offspring an advantage above and beyond that accrued by random mating.

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