scholarly journals AN EXPERIMENTAL STUDY OF THE EFFECTS OF CHEMICALLY DISPERSED OIL ON FEATHER STRUCTURE AND WATERPROOFING IN COMMON MURRES (URIA AALGE)

2018 ◽  
Vol 54 (2) ◽  
pp. 315-328 ◽  
Author(s):  
Emily R. Whitmer ◽  
Becky A. Elias ◽  
Danielle J. Harvey ◽  
Michael H. Ziccardi
Keyword(s):  
Experimental Study ◽  
Uria Aalge ◽  
Dispersed Oil ◽  
Common Murres ◽  
Chemically Dispersed Oil

scholarly journals Ophthalmic effects of petroleum dispersant exposure on common murres (Uria aalge): An experimental study

2016 ◽  
Vol 113 (1-2) ◽  
pp. 387-391 ◽  
Author(s):  
Christine V. Fiorello ◽  
Kate Freeman ◽  
Becky A. Elias ◽  
Emily Whitmer ◽  
Michael H. Ziccardi
Keyword(s):  
Experimental Study ◽  
Uria Aalge ◽  
Common Murres

scholarly journals Ecological interactions and habitat modification in nesting Common Murres, Uria aalge

1996 ◽  
Vol 6 (3) ◽  
pp. 261-269 ◽  
Author(s):  
Julia K. Parrish ◽  
Robert T. Paine
Keyword(s):  
Reproductive Output ◽  
Habitat Modification ◽  
Haliaeetus Leucocephalus ◽  
Uria Aalge ◽  
Ecological Interactions ◽  
Bald Eagles ◽  
Predator Removal ◽  
Common Murre ◽  
Corvus Caurinus ◽  
Common Murres

SummarySeabird populations suffer from a variety of natural and human-induced sources of mortality and loss of lifetime reproductive output. On the outer coast of Washington State, Common Murre Uria aalge populations have been in decline for approximately the last decade and are currently reproductively active only at Tatoosh Island. These murres nest in two basic habitat types: crevices (25% of the population) and larger cliff-top subcolonies (75%). Murres in cliff-top subcolonies have suffered dramatic reductions in reproductive success in recent years relative to conspecifics nesting in the crevices, primarily due to egg predation by Glaucous-winged Gulls Larus glaucescens and Northwestern Crows Corvus caurinus, facilitated by the presence of Bald Eagles Haliaeetus leucocephalus. Because predator removal is not feasible and creation of additional crevice habitat is difficult, expensive and potentially ineffective, we have designed a temporary habitat modification (the “silk forest”) which replaces the natural vegetation cover and modifies the interaction between murres and eagles. Within the test subcolony, murres nesting under and immediately adjacent to the silk forest produced nearly twice as many eggs per square metre as their conspecifics nesting in adjacent exposed-ground areas.

Exceptional variation in the appearance of Common Murre eggs reveals their potential as identity signals

The Auk ◽  
2021 ◽  
Author(s):  
Tim R Birkhead ◽  
Jamie E Thompson ◽  
Amelia R Cox ◽  
Robert D Montgomerie
Keyword(s):  
Uria Aalge ◽  
Quantitative Evidence ◽  
Breeding Group ◽  
Common Murre ◽  
Trimodal Distribution ◽  
Common Murres ◽  
Egg Traits ◽  
Breeding Groups ◽  
Different Parts

Abstract We studied the ground colors and maculations of 161 Common Murre (Uria aalge) eggs laid by 43 females in 3 small breeding groups on the cliffs of Skomer Island, Wales, in 2016–2018. Both the colors and maculations varied much more among than within females, providing quantitative evidence for the egg traits that might facilitate the parents’ ability to identify their own eggs on the crowded breeding ledges where the density is typically ~20 eggs m–2. Ground colors had a trimodal distribution of hue values (whitish to pale brown, pale blue, or vivid blue-green) and maculations ranged from none to complex squiggles and blotches. The eggs laid by each female in different years were similar to one another, and replacement eggs laid by females within years were also more similar to their first egg than to other eggs in the same breeding group. Egg appearance did not differ among the 3 breeding groups that we studied. Our findings thus support anecdotal observations that, within and between years, female Common Murres lay eggs that have similar ground colors and maculations. We do not, however, find evidence that there is much difference among the eggs laid in different parts of a colony.

The Effects of Oil and Chemically Dispersed Oil on Natural Phytoplankton Communities

1987 ◽  
pp. 173-185 ◽  
Author(s):  
M. Scholten ◽  
J. Kuiper ◽  
H. Het Van Groenewoud ◽  
G. Hoornsman ◽  
E. Van Der Vlies
Keyword(s):  
Dispersed Oil ◽  
Phytoplankton Communities ◽  
Chemically Dispersed Oil ◽  
Natural Phytoplankton
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