Nesting and Productivity of Bald Eagles
Author : Fredrick C. Robards
Publisher :
Page : 64 pages
File Size : 11,98 MB
Release : 1966
Category : Bald eagle
ISBN :
Author : Fredrick C. Robards
Publisher :
Page : 64 pages
File Size : 11,98 MB
Release : 1966
Category : Bald eagle
ISBN :
Author : Philip F. Schempf
Publisher :
Page : 0 pages
File Size : 28,35 MB
Release : 2010
Category : Science
ISBN : 9780888396952
An expansive collection of papers and articles from internationally recognized bald eagle experts. Presented is a complete portrait of the status and ecology of the bald eagle in Alaska.A collection of papers and articles from international bald eagle experts, which present a complete portrait of the status and ecology of the bald eagle in Alaska. Myriad topics include culture, biology, population history and status, conservation and management, the Alaskan habitat from the northern rainforest to the Aleutian Islands, attitudes from diverse groups from the Tlingit to bounty hunters, along with sound scientific data.
Author : Frank B. Isaacs
Publisher :
Page : 18 pages
File Size : 32,7 MB
Release : 1983
Category :
ISBN :
Author : Joseph Andrew Dugoni
Publisher :
Page : 302 pages
File Size : 45,40 MB
Release : 1980
Category : Bald eagle
ISBN :
Abstract.
Author : Nova Scotia. Department of Lands and Forests
Publisher :
Page : pages
File Size : 38,50 MB
Release : 1986
Category :
ISBN :
Author : Leland H. Grim
Publisher :
Page : 36 pages
File Size : 37,61 MB
Release : 1995
Category : Bald Eagle
ISBN :
Annual number of breeding pairs, fledged eaglets, and reproductive success increased during the study but below reproductive success of healthy bald eagle populations.
Author : Teryl G. Grubb
Publisher :
Page : 16 pages
File Size : 34,71 MB
Release : 2003
Category : Bald eagle
ISBN :
Bayesian inference facilitated structured interpretation of a nonreplicated, experience-based survey of potential nesting habitat for bald eagles (Haliaeetus leucocephalus) along the five Great Lakes shorelines. We developed a pattern recognition (PATREC) model of our aerial search image with six habitat attributes: (a) tree cover, (b) proximity and (c) type/amount of human disturbance, (d) potential foraging habitat/shoreline irregularity, and suitable trees for (e) perching and (f) nesting. Tree cover greater than 10 percent, human disturbance more than 0.8 km away, a ratio of total to linear shoreline distance greater than 2.0, and suitable perch and nest trees were prerequisite for good eagle habitat (having sufficient physical attributes for bald eagle nesting). The estimated probability of good habitat was high (96 percent) when all attributes were optimal, and nonexistent (0 percent) when none of the model attributes were present. Of the 117 active bald eagle nests along the Great Lakes shorelines in 1992, 82 percent were in habitat classified as good. While our PATREC model provides a method for consistent interpretation of subjective surveyor experience, it also facilitates future management of bald eagle nesting habitat along Great Lakes shorelines by providing insight into the number, type, and relative importance of key habitat attributes. This practical application of Bayesian inference demonstrates the technique's advantages for effectively incorporating available expertise, detailing model development processes, enabling exploratory simulations, and facilitating long-term ecosystem monitoring.
Author : William Wesley Bowerman
Publisher :
Page : 634 pages
File Size : 44,42 MB
Release : 1993
Category : Bald eagle
ISBN :
Author : National Park Service
Publisher : Createspace Independent Pub
Page : 40 pages
File Size : 26,82 MB
Release : 2013-11-30
Category : Nature
ISBN : 9781494239183
Bald eagles (Haliaeetus leucocephalus) are keystone predators on avian (e.g., seabirds) and fish (e.g., salmon) populations and hence serve an important ecological role in freshwater and marine coastal systems in national parks within the Southwest Alaska Network (SWAN; Figure 1) of the National Park Service (NPS). Three of these parks, Katmai National Park and Preserve (KATM), Kenai Fjords National Park (KEFJ), and Lake Clark National Park and Preserve (LACL), contain large breeding populations of bald eagles. Nonetheless, bald eagle populations in general are under continuing threat from human-related impacts such as ecotourism, sport and commercial fishing, timber harvest, potential mining activities adjacent to the parks, and potential oil spills or other accidents along marine coastlines (Buehler 2000). Further, global climate change will have an unknown effect on their forage base and nesting habitat (e.g., see Agler et al. 1999). Consequently, bald eagles were selected as a vital sign to monitor in SWAN parks and this vital sign was rated as highly desirable in the prioritization process (Bennett et al. 2006).
Author : Jon M. Gerrard
Publisher : Smithsonian Institution
Page : 272 pages
File Size : 15,17 MB
Release : 2014-10-28
Category : Nature
ISBN : 1588344436
The Bald Eagle is a comprehensive description of the morphology, behavior, flight patterns, hunting, migration, nesting, development, and growth of bald eagles.