Effects of Contaminants, Food Availability, and Weather on the Reproductive Rate of Lake Superior Bald Eagles (haliaeetus Leucocephalus) PDF Download

Author: Cheryl Joan Dykstra
Publisher:
ISBN:
Category : Bald eagle
Languages : en
Pages : 520

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Author: Alison Laurie Neilson
Publisher:
ISBN:
Category : Bald eagle
Languages : en
Pages : 20

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Heavy development in the Great Lakes area has diminished eagle nesting habitat and foraging opportunities. This document presents information on bald eagles and describes some of the challenges to bald eagle populations around the Great Lakes, including chemical contaminants in the aquatic food web. It outlines legislative protection and conservation strategies, and describes current conditions and nesting results for bald eagles.

Author: Leland H. Grim
Publisher:
ISBN:
Category : Bald Eagle
Languages : en
Pages : 36

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Annual number of breeding pairs, fledged eaglets, and reproductive success increased during the study but below reproductive success of healthy bald eagle populations.

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 984

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Author: Christopher Ellis Gill
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612375376
Category : Bald eagle
Languages : en
Pages : 298

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Author: Teryl G. Grubb
Publisher:
ISBN:
Category : Bald eagle
Languages : en
Pages : 16

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Book Description
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:
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 884

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Author: Curtice R. Griffin
Publisher:
ISBN:
Category : Bald eagle
Languages : en
Pages : 20

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Bald eagles (Haliaeetus leucocephalus) associate with wintering waterfowl concentrations throughout the United States, but little detailed information is available on eagle-waterfowl relations. This report concerns the ecology of bald eagles wintering in the vicinity of Swan Lake National Wildlife Referenc in north-central Missouri and, more specifically, examines the association of the eagles with waterfowl during the winters of 1975-76, 1976-77, and 1977-78

Author: William Wesley Bowerman
Publisher:
ISBN:
Category : Bald eagle
Languages : en
Pages : 634

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Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 800

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