A Comparison of Functional and Morphological Adaptations in the Common Murre (Uria aalge) and Thick-Billed Murre (Uria lomvia)

The Condor ◽  
1971 ◽  
Vol 73 (1) ◽  
pp. 1-27 ◽  
Author(s):  
Lowell Spring
Keyword(s):  
Uria Aalge ◽  
Uria Lomvia ◽  
Common Murre ◽  
Morphological Adaptations ◽  
The Common

scholarly journals The common murre (Uria aalge), an auk seabird, reacts to underwater sound

2020 ◽  
Vol 147 (6) ◽  
pp. 4069-4074 ◽  
Author(s):  
Kirstin Anderson Hansen ◽  
Ariana Hernandez ◽  
T. Aran Mooney ◽  
Marianne H. Rasmussen ◽  
Kenneth Sørensen ◽  
...  
Keyword(s):  
Uria Aalge ◽  
Underwater Sound ◽  
Common Murre ◽  
The Common

Energy Metabolism in the Locomotor Muscles of the Common Murre (Uria aalge) and the Atlantic Puffin (Fratercula arctica)

The Auk ◽  
1987 ◽  
Vol 104 (4) ◽  
pp. 733-739 ◽  
Author(s):  
M. Benjamin Davis ◽  
Helga Guderley
Keyword(s):  
Krebs Cycle ◽  
Columba Livia ◽  
Oxygen Storage ◽  
Uria Aalge ◽  
Common Murre ◽  
Fratercula Arctica ◽  
Metabolic Systems ◽  
Flight Muscles ◽  
The Common ◽  
Atlantic Puffin

Abstract To compare the metabolic systems that support the combination of flying and diving with those used to support burst flying and sustained flying, myoglobin concentrations and maximum enzyme activities were determined for selected enzymes of glycolysis, the Krebs cycle, and amino acid metabolism in the pectoral, supracoracoideus, and sartorius muscles of the Common Murre (Uria aalge), Atlantic Puffin (Fratercula arctica), Rock Dove (Columba livia; hereafter "pigeon"), and Ring-necked Pheasant (Phasianus colchicus). Glycolytic enzyme levels in the flight muscles were lower in the murre and the puffin than in the pheasant, while both glycolytic and Krebs-cycle enzyme levels resembled those in the pigeon. We believe puffins and murres do not rely extensively on anaerobic glycolysis during diving. In concordance with a role in oxygen storage for diving, the levels of myoglobin in the flight muscles of murres and puffins were higher than those in pigeons or pheasants. They were lower than published values for penguins, however. In contrast to the trends for pigeon and pheasant muscles, the alcid sartorius muscles had a considerably lower aerobic orientation than the flight muscles.

PREY DENSITY AND THE BEHAVIORAL FLEXIBILITY OF A MARINE PREDATOR: THE COMMON MURRE (URIA AALGE)

Ecology ◽  
2007 ◽  
Vol 88 (8) ◽  
pp. 2024-2033 ◽  
Author(s):  
Ann M. A. Harding ◽  
John F. Piatt ◽  
Joel A. Schmutz ◽  
Michael T. Shultz ◽  
Thomas I. Van Pelt ◽  
...  
Keyword(s):  
Prey Density ◽  
Behavioral Flexibility ◽  
Uria Aalge ◽  
Marine Predator ◽  
Common Murre ◽  
The Common

The ectoparasites of some marine birds from Bamfield Marine Station, British Columbia, with particular reference to the common murre, Uria aalge (Pont.)

1979 ◽  
Vol 57 (10) ◽  
pp. 1980-1984 ◽  
Author(s):  
John T. Ballard ◽  
Richard A. Ring
Keyword(s):  
British Columbia ◽  
Host Species ◽  
Uria Aalge ◽  
Marine Birds ◽  
Common Murre ◽  
Marine Station ◽  
The Common

Six species of birds from the region of the Bamfield Marine Station, British Columbia, were examined for ectoparasites. A total of seven species of Mallophaga belonging lo five genera (Saemundssonia, Austromenopon, Cummingsielli, Anatoecus, and Anaticola) were recovered. One flea (Mioctenopsylla traubi, Siphonaptera), leather mites of the genus Zachvatkinia, other mites of the genera Ameronothrus. Cymbaeremaeus, and Rhinonyssus, and ticks of the genus Ixodes were also identified. Each host species and its ectoparasites are discussed separately. Differences in the ectoparasite burdens of juveniles and adults of both sexes of the common murre, Uria aalge (Pont.), are compared and contrasted.

Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. III. Feeding ecology of the young

1987 ◽  
Vol 65 (7) ◽  
pp. 1638-1649 ◽  
Author(s):  
T. R. Birkhead ◽  
D. N. Nettleship
Keyword(s):  
Caloric Intake ◽  
Interspecific Difference ◽  
Uria Aalge ◽  
Uria Lomvia ◽  
Ice Breakup ◽  
Common Murre ◽  
Interspecific Differences ◽  
Daubed Shanny ◽  
Common Murres ◽  
Capelin Mallotus Villosus

A simultaneous comparison of the foods of Common Murre, Uria aalge, and Thick-billed Murre, Uria lomvia, chicks at the same location showed that the species composition of fish fed to chicks of the two murre species differed significantly. In both years of the study, Common Murre chicks were fed predominantly capelin, Mallotus villosus (78–80% by weight), whereas Thick-billed Murre chicks were fed mainly daubed shanny, Lumpenus maculatus (61–70% by weight). Thick-billed Murres tended to feed their chicks more frequently than Common Murres, probably because in both years the mean caloric value of their prey was lower than that of the Common Murre's. No other statistically significant interspecific differences were consistent between years. Prey lengths and weights overlapped considerably between the murre species, and the caloric intake of chicks showed no consistent interspecific difference. Marked interyear differences in feeding rate, prey size, and caloric intake occurred in both species. In 1982 ice breakup was late, and the murres' breeding seasons were delayed; this appeared to result in poor synchronization between the temporal pattern of food availability and the timing of each species' chick-rearing period, and the caloric intakes of chicks of both species were lower in that year than in 1983.

Ecological relationships between Common Murres, Uria aalge, and Thick-billed Murres, Uria lomvia, at the Gannet Islands, Labrador. I. Morphometrics and timing of breeding

1987 ◽  
Vol 65 (7) ◽  
pp. 1621-1629 ◽  
Author(s):  
T. R. Birkhead ◽  
D. N. Nettleship
Keyword(s):  
Egg Laying ◽  
Laying Date ◽  
Uria Aalge ◽  
Uria Lomvia ◽  
Ecological Relationships ◽  
Ice Breakup ◽  
Common Murre ◽  
Common Murres ◽  
Adult Body Weight ◽  
One Year

Several aspects of the breeding biology of Common Murres (Uria aalge) and Thick-billed Murres (Uria lomvia) in 1981–1983, at the Gannet Islands, Labrador, are described. At this colony there were ca. 60 000 pairs of Common Murres, and 1400 pairs of Thick-billed Murres. Common Murres were slightly heavier and had significantly shorter wings, and longer, narrower bills than Thick-billed Murres. The timing of egg laying varied between years (late breeding in one year was associated with late ice breakup), but the median laying date of Common Murres was consistently earlier (by up to 10 days) than that of Thick-billed Murres. For both species median laying dates fell between mid and late June each year. Common Murre eggs were larger and relatively longer than Thick-billed Murre eggs, but in both species fresh egg weight was about 11% of adult body weight. Incubation periods were similar in each species (33 days), but chick-rearing periods were longer in Common Murres (24 days) than in Thick-billed Murres (21 days) in all years. Seasonal patterns of colony attendance were broadly similar in the two species each year, except that Common Murres showed a consistent increase in numbers between laying and chick departure, and tended to remain at the colony for less time after chicks had departed compared with Thick-billed Murres. All birds of both species left the colony by mid-September each year.

scholarly journals Thickness of Common Murre (Uria aalge) eggshells in Atlantic Canada

2014 ◽  
Vol 128 (1) ◽  
pp. 72 ◽  
Author(s):  
Donald W. Pirie-Hay ◽  
Alexander L. Bond
Keyword(s):  
Newfoundland And Labrador ◽  
Shell Thickness ◽  
Egg Size ◽  
Environmental Pollutants ◽  
Maternal Investment ◽  
Uria Aalge ◽  
Uria Lomvia ◽  
Common Murre ◽  
Common Murres ◽  
Nesting Material

Reported values for eggshell thickness in Common Murre (Uria aalge) are few, and even fewer since the decline in use of organochlorine pesticides and other environmental pollutants that caused significant thinning of shells. The eggshells of Common Murres and Thick-billed Murres (Uria lomvia) are among the thickest and heaviest, proportionately, of any bird and this represents a non-trivial maternal investment. We measured the length and breadth of Common Murre eggs collected from Machias Seal Island, New Brunswick, in 2006, and Gull Island, Newfoundland and Labrador, in 2012, and we measured the thickness of the eggshells. Shell thickness was not related to egg size or volume, and it varied in individual eggs. The shells of Common Murre eggs from Machias Seal Island (mean and standard deviation [SD] (0.767, SD 0.078 mm) and Gull Island (0.753, SD 0.057 mm) were significantly thicker than any previously reported value and among the thickest of all birds. Such thickness is likely a result of nesting on rock substrate with no nesting material and, perhaps, high breeding densities.

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