Endangered Species Update articles from October - December 2004

Endangered Species Update archives from October - December 2004

Guidelines for developing status-determining criteria.
October 1, 2004... Abstract Currently, the Endangered Species Act (ESA) employs a two-tier system, listing species either as endangered (in danger of extinction) or threatened (likely to become endangered). One approach, to reassert scientific objectivity in...

Rodent pest control through the reintroduction of an extirpated raptor species.(Pittsburgh Zoo and PPG Aquarium )
October 1, 2004... Abstract Zoos, by nature, are breeding grounds for high numbers of rodents. The use of poisons and traps has been the main tool for rodent control. By acquiring and reintroducing avian predators, specifically barn owls, into a zoo setting,...

Amphibian conservation strategies: translocating an entire population of Blanchard's cricket frog (Acris crepitans blanchardi) in Southeast Michigan.(National Amphibian Conservation Center, Detroit Zoo)
October 1, 2004... Abstract The dramatic decline of amphibian populations worldwide is an urgent conservation issue. The root causes underlying many amphibian declines are unknown. One Michigan species of Special Concern, the Blanchard's cricket frog (Acris...

Using conspecific attraction to conserve endangered bird.
October 1, 2004... Abstract Conspecific attraction, the tendency for individuals of a species to settle near one another, may provide managers and conservationists with a new tool for the recovery of many bird species. Conspecific attraction has been used in...

Puerto Rican Plain Pigeon food intake in a captive breeding program.
October 1, 2004... The Puerto Rican Plain Pigeon (Columba inornata wetmorei) is one of the endangered species in the island of Puerto Rico. A captive breeding program was established from 1984 to 2001 at the University of Puerto Rico (UPR) Humacao Campus as a way...

Keepers of the Wolves.(Keepers of the Wolves: The Early Years of Wolf Recovery in Wisconsin)(Book review)
October 1, 2004... KEEPERS OF THE WOLVES The Early Years of Wolf Recovery in Wisconsin RICHARD P. THIEL The proposed federal delisting of Midwestern gray wolves from the ESA The status of the gray wolf, Canis lupus, under the Endangered Species...

Focus on nature[TM].(cowbirds trick vireos to raise their chicks)(Brief article)
October 1, 2004... The chicks sure are growing fast thinks the LEAST BELL'S VIREO (Vireo bellii pusillus). Instead of raising 3 small, delicate chicks she is caring for 3 giant, voracious chicks. Its happened again. These chicks are brown-headed cowbirds. The...