Beacham's Guide to the Endangered Species of North America by Beacham W., Castronova F.V., Sessine S.

By Beacham W., Castronova F.V., Sessine S.

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Extra resources for Beacham's Guide to the Endangered Species of North America

Sample text

A single terrestrial Sonora tiger salamander was found near Oak Spring in Copper Canyon of the Huachuca Mountains. 6 mi (960 m) to the southwest. A total of 79 aquatic sites in the San Rafael Valley and adjacent slopes of the Huachuca and Patagonia mountains have been surveyed for salamanders. These include most potential aquatic habitats 716 Amphibians on public lands. However, private lands in the center of the San Rafael Valley have not been surveyed intensively. Thirty sites in northeastern Sonora and 26 sites in northwestern Chihuahua, Mexico, were surveyed by Collins and Jones in 1987.

The disruption of the natural fire cycle has resulted in an increase in slash pine on sites formerly dominated by longleaf pine, an increase in hardwood understory, and a decrease in herbaceous ground cover. Ponds surrounded by pine plantations and protected from the natural fire regime become unsuitable flatwoods salamander breeding sites, due to canopy closure and the resultant reduction in emergent herbaceous vegetation needed for egg deposition and larval development sites. Current forest management is moving away from burning as a management tool due to liability considerations and concerns that fire will damage the quality of the timber.

The San Marcos salamander breeds 722 Threatened July 14, 1980 Plethodontidae (Lungless Salamander) Long narrow body light brown above with a row of pale flecks and yellowish white below. Lakes and rivers. Amphipods, aquatic snails, and fly larvae. Egg masses in standing pools. Groundwater pumping. Texas and lays eggs in standing pools amid thick mats of aquatic vegetation. Eggs hatch in about 24 days. This species is carnivorous and feeds on amphipods, midge fly larvae, and aquatic snails. It remains stationary until prey pass closely and then abruptly snaps its head, taking the prey.

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