Forest canopy closure and juvenile emigration by pool-breeding amphibians in Maine
Article Abstract:
Juvenile emigration is an important life-history event for amphibians breeding in temporary pools, yet little is understood regarding the habitat relations during dispersal. A new study examines a natural population of wood frogs and spotted salamanders along forest-clearcut edges in central Maine to ascertain habitat preference during emigration of pool-breeding amphibians. The study shows that the abundances of adults and juveniles of both species rapidly declines in line with the thinning forest canopy and are likely to benefit from maintaining connectivity between aquatic breeding sites and upland forest habitats.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1999
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POwer to detect trends in waterbird abundance with call-response surveys
Article Abstract:
Surveys that monitor trends of bird populations often undersample inconspicuous waterbirds and special procedures are needed to assess these species. A new call-response survey along 36 routes in Maine wetlands was undertaken between 1989 and 1992 to assess the feasibility of using the method to conduct large-scale studies of the regional populations of secretive waterbirds, such as the grebe, bittern, rail and sora. It is concluded that call-response surveys can provide useful and statistically-accurate trends in waterbird populations.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1997
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Assessing potential gray wolf restoration in the northeastern United States: a spatial prediction of favorable habitat and potential population levels
Article Abstract:
The US Endangered Species Act has identified the northeastern US as a potential location for the reestablishment of the endangered gray wolf or eastern timber wolf. A new survey, using data on regional road abundance and availability of prey in an area of Maine, estimates that the area is able to sustain a population of some 1,312 wolves. Large areas of land are increasingly important for the survival of wolves although their effect on the ecosystem should be carefully monitored.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1998
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