Animal Sciences Commons^™

Home Ranges Of Rusty Blackbirds Breeding In Wetlands: How Much Would Buffers From Timber Harvest Protect Habitat?, Luke L. Powell, Thomas P. Hodgman, William E. Glanz

Biology and Ecology Faculty Scholarship

We calculated the home ranges and core areas of 13 adult Rusty Blackbirds (Euphagus carolinus) in Maine to determine (1) the area requirements of breeding adults, (2) whether area requirements of the sexes and of colonial and noncolonial individuals differ, and (3) the proportion of the home range and core area that would be protected by a buffer of no logging of 50–100 m around occupied wetlands. Mean home ranges (37.5 ± 12.6 ha) and core areas (11.1 ± 2.8 ha) were large in comparison to those of other breeding icterids, and adults often foraged in multiple unconnected wetlands. Rusty …

The Lobster Bulletin, Fall 2010, Lobster Institute, University Of Maine

Lobster Bulletin

The Lobster Bulletin newsletter includes research updates, and information on lobsters and the lobster industry. The Lobster Institute at the University of Maine is dedicated to protecting and conserving the lobster resource, and enhancing lobstering as an industry and a way of life.

Headlines in the Fall 2010 issue include:

• The Heanssler Family: Three Generations of Volunteer Lobster Researchers
• Lobstermen Qualify for TAAF Program — Can Apply for Training & Cash Benefits
• Update on Lobster Science Centre's Molt & Qualify Monitoring Available
• Research Report: Habitat Mooring System Showing Early Results
• Research Report: Vertical Line Density Research

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The Lobster Bulletin, Summer 2010, Lobster Institute, University Of Maine

Lobster Bulletin

The Lobster Bulletin newsletter includes research updates, and information on lobsters and the lobster industry. The Lobster Institute at the University of Maine is dedicated to protecting and conserving the lobster resource, and enhancing lobstering as an industry and a way of life.

Headlines in the Summer 2010 issue include:

• Mooring That Creats Lobster Habitat Now Available — Portion of Sales to Support Mission of the Lobster Institute
• Input Sought for Lobster Institute Strategic Plan
• The Lobster Institute's 2010 Needs Assessment Survey
• Research Report: Bait: How Much is Enough?
• Research Report: Lobster Assessment Models Compared
• Research Report: Paper on Modeling …

Tb204: Organic Milk Production In Maine: Attributes, Costs, And Returns, Amelia L. Cook, Patrick S. Heacock, George K. Criner, Lisa A. Bragg

Technical Bulletins

This report summarizes attributes, costs, and returns for organic dairy farms in Maine that responded to the 2008 dairy cost of production survey. This survey and analysis was conducted by the University of Maine in cooperation with the Maine Milk Commission. This publication reports on data collected over the 2007 production year. Analysis and discussion of the data revolve around four categories. The first category averages all 30 organic farms to create a statewide group. The authors then broke these 30 farms into three size groups (small, medium, and large) based on the number of cows on each farm. There …

Land Use Planning And Vernal Pool Conservation In A Southern Maine Town, Robert Carlton Freeman

Electronic Theses and Dissertations

In this dissertation I investigate the impacts of both growth management regulations and vernal pool protection regulations on landscape permeability for wood frogs (Rana sylvatica), a vernal pool-obligate species. Motivated by new legislation in Maine (USA) to protect vernal pools and the species that depend on them, I combined a spatially-explicit economic model of the conversion of undeveloped parcels to residential use with a landscape permeability model for wood frogs. I estimated the economic model using a Bayesian Gibbs Sampler to account for spatial error dependence and used the results to predict future landscape patterns in a focal town, Falmouth, …

The Lobster Bulletin, Spring 2010, Lobster Institute, University Of Maine

Lobster Bulletin

The Lobster Bulletin newsletter includes research updates, and information on lobsters and the lobster industry. The Lobster Institute at the University of Maine is dedicated to protecting and conserving the lobster resource, and enhancing lobstering as an industry and a way of life.

Headlines in the Spring 2010 issue include:

• Record Turnout at the Lobster Institute's 2010 Canadian/U.S. Lobstermen's Town Meeting
• Lobster Institute Begins Strategic Planning Process
• Certified Cargo Screening Program
• Research Report: Hard Plastics Decompose in Oceans, Releasing Endocrine Disrupter BPA
• Research Report: Fishing industry worried about possible threats of seismic testing on lucrative Georges Bank fishing grounds
• Maine …

Comparing Relative Abundance Of Amphibians In Forest Canopy Gaps Of Natural Origin Vs. Timber Harvest Origin, Carol J. Strojny, Malcolm L. Hunter Jr.

Publications

Relative abundance of amphibians in forest canopy gaps of natural origin vs. timber harvest origin.— Small–scale canopy gaps created by logging may retain adequate habitat structure to maintain amphibian abundance. We used pitfalls with drift fences to measure relative abundance of amphibians in 44 harvested gaps, 19 natural treefall gaps, and 36 closed–canopy forest plots. Metamorphs had relatively lower capture rates in large harvest gaps for Ambystoma maculatum, Lithobates catesbeianus, L. clamitans, and L. sylvaticus but we did not detect statistically significant (p < 0.1) differences among gap types for Lithobates palustris metamorphs. L. clamitans juveniles and L. sylvaticus juveniles and adults had relatively …

The Lobster Bulletin, Winter 2010, Lobster Institute, University Of Maine

Lobster Bulletin

The Lobster Bulletin newsletter includes research updates, and information on lobsters and the lobster industry. The Lobster Institute at the University of Maine is dedicated to protecting and conserving the lobster resource, and enhancing lobstering as an industry and a way of life.

Headlines in the Winter 2010 issue include:

• Lobster Institute to Host 2010 Canadian/U.S. Lobstermen's Town Meeting, March 26-27
• Factors Affecting the Post-Capture Survivability of the Lobster Homarus americanus
• 2009 Friends of the Lobster Institute
• Research Report: Maine Sea Grant Announces NOAA Funding
• Research Report: Maine Sensors, Inc. Exploring a New Technique to Gauge Lobster Vitality
• Boat Raffle …

Nest-Site Selection And Nest Survival Of The Rusty Blackbird: Does Timber Management Adjacent To Wetlands Create Ecological Traps?, Luke L. Powell, Thomas P. Hodgman, William E. Glanz, James D. Osenton, Caleb M. Fisher

Biology and Ecology Faculty Scholarship

Animals are subject to ecological traps when anthropogenic changes create habitat that appears suitable but when selected results in decreased fitness. The Rusty Blackbird (Euphagus carolinus) breeds in boreal wetlands and has declined by 85–95% over the last half century. We studied nest-site selection and daily nest survival rate (DSR) of 43 Rusty Blackbird nests in northern New England and evaluated whether regenerating logged areas adjacent to wetlands created ecological traps. Although nesting adults avoided high-canopied forests and selected areas with dense balsam fir (Abies balasmea) 1 to 3 m high, those characteristics were not associated …