Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
King, Tommy D.
Committee Member
Minnis, Richard
Committee Member
Strickland, K. Bronson
Date of Degree
12-13-2008
Document Type
Graduate Thesis - Open Access
Major
Wildlife and Fisheries Science
Degree Name
Master of Science
College
College of Forest Resources
Department
Department of Wildlife and Fisheries
Abstract
Interior Double-crested cormorant reproduction was examined on a large geographical scale to evaluate management actions. Three distinct breeding areas across Ontario were selected. Beginning in 2002, over 11,000 preledged cormorants have been marked. During 2006 and 2007, re-observation of banded birds, colony data such as nest, egg, and chick measurements, and island morphology, were collected. Data revealed no significant regional differences in adult size. However, eggs in eastern Lake Ontario (ELO) were larger than North Channel of Lake Huron (NChan) and Lake of the Woods (LOW). Chicks in ELO throughout development were smaller than NChan and LOW. Number of gulls was correlated inversely to cormorant fledge rate. Survival estimates were <20% for young of the year, but increased to >80% after year 2. Elasticity analysis revealed that a 50% reduction in adult survival combined with 100% fecundity reduction would result in a 42% reduction in population growth.
URI
https://hdl.handle.net/11668/15603
Recommended Citation
Chastant, Jennifer Erin, "Population characteristics of interior double-crested cormorants breeding across the southern border of Ontario" (2008). Theses and Dissertations. 3564.
https://scholarsjunction.msstate.edu/td/3564
Comments
Double-crested cormorant||survival estimates||population dynamics||reproduction||Phalacrocorax auritus