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Isolation and Identification of Bacterial Strains from Skin of Terrestrial Amphibians

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Ecological separation in a polymorphic terrestrial salamander.

Carl D Anthony¹, Matthew D Venesky, Cari-Ann M Hickerson

¹Department of Biology, John Carroll University, University Heights, OH 44118, USA. canthony@jcu.edu

The Journal of Animal Ecology

|May 16, 2008

Summary

This summary is machine-generated.

Red-backed salamanders show distinct diets and mating preferences between striped and unstriped morphs. While some ecological separation exists, assortative mating suggests limited divergence in this polymorphic species.

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Area of Science:

Ecology
Evolutionary Biology
Herpetology

Background:

Speciation research often focuses on reproductive isolation in recently diverged populations.
Polymorphic species offer insights into reproductive isolation during divergence.
Plethodon cinereus (red-backed salamander) color morphs have been linked to climate, but diet and mate choice differences remain unexplored.

Purpose of the Study:

To investigate sympatric ecological separation and reproductive isolation between color morphs of Plethodon cinereus.
To determine if diet, mate choice, and surface activity differ between striped and unstriped red-backed salamanders.

Main Methods:

A 2-year field study in north-eastern Ohio utilizing artificial cover objects.
Assessment of salamander diet composition and prey profitability.
Analysis of mating preferences and surface activity patterns in relation to color morph.

Main Results:

Significant differences in diet were observed between striped and unstriped morphs, with striped individuals consuming more diverse and profitable prey.
Assortative mating was detected, with opposite-sex pairs consisting of the same color morph.
Striped males were more frequently found with larger females compared to unstriped males.
Unstriped morphs exhibited earlier withdrawal from the forest floor in response to falling temperatures, supporting adaptation to warmer conditions.

Conclusions:

The two color morphs of Plethodon cinereus display partial ecological separation and a tendency for assortative mating.
Despite these differences, the frequency of intermorph pairings suggests that the populations are unlikely to be undergoing significant divergence at this time.