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Energy cost of vessel disturbance to Kittlitz's Murrelets Brachyramphus brevirostris

Marine Ornithology

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Abstract

We evaluated the energy cost of vessel disturbance for individual Kittlitz’s Murrelets Brachyramphus brevirostris in Glacier Bay National Park and Preserve in Alaska, USA. We used Monte Carlo simulations to model the daily energy expense associated with flight from vessels by both breeding and non-breeding birds and evaluated risk based on both the magnitude of costs incurred and the degree to which the costs may be chronic. We used two scenarios of vessel disturbance for average- and peak-vessel traffic. Because they are more likely to fly away from vessels, non-breeding birds had a greater increase in energy expenditure when disturbed (up to 30% increase under the average scenario and >50% increase under the peak scenario) than breeders (up to 10% and 30% increases under the average and peak scenarios, respectively). Likewise, non-breeding birds were more likely to experience chronic increases in energy expense (i.e. a greater percentage of days with an increase in energy expenditure) than breeding birds. Our modeling results indicated that breeding and non-breeding birds were both susceptible to fitness consequences (e.g. reduced reproductive success and survival) resulting from the energy cost.

Geospatial Extents

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Energy cost of vessel disturbance to Kittlitz's Murrelets Brachyramphus brevirostris
Series title:
Marine Ornithology
Volume
41
Issue:
1
Year Published:
2013
Language:
English
Publisher:
Marine Ornithology
Contributing office(s):
Coop Res Unit Seattle
Description:
9 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Marine Ornithology
First page:
13
Last page:
21
Number of Pages:
9
Country:
United States
State:
Alaska
Other Geospatial:
Glacier Bay National Park