scholarly journals Les oiseaux marins nicheurs dans l’aire de coordination du parc marin du Saguenay–Saint-Laurent

2018 ◽  
Vol 142 (2) ◽  
pp. 47-54
Author(s):  
Jean-François Rail
Keyword(s):  
Larus Argentatus ◽  
Uria Aalge ◽  
Phalacrocorax Auritus ◽  
Cepphus Grylle ◽  
Aire De Répartition

Dans l’aire de coordination du parc marin du Saguenay–Saint-Laurent, on compte 27 sites abritant des colonies actives d’oiseaux marins. Cette communauté compterait plus de 23 000 couples nicheurs appartenant à 8 espèces, dont 4 laridés et 3 alcidés, en plus du cormoran à aigrettes (Phalacrocorax auritus). Le goéland argenté (Larus argentatus) et le cormoran à aigrettes, de par leur abondance et leur répartition, sont sans doute les deux espèces les plus représentatives de l’aire d’étude. Quatre espèces sont tout près de la limite amont de leur aire de répartition dans le Saint-Laurent. Les effectifs de la plupart des espèces ont fluctué passablement depuis le milieu des années 1970, mais apparaissent maintenant relativement stables. Deux tendances plus récentes apparaissent cependant : la multiplication rapide du guillemot marmette (Uria aalge) et le déclin du guillemot à miroir (Cepphus grylle) jusqu’à un niveau très bas. Des recommandations sont émises pour la conservation et la gestion de cette communauté.

Choix de l'emplacement des nids de Cormorans à aigrettes (Phalacrocorax auritus) aux îles de la Madeleine, Québec

1987 ◽  
Vol 65 (1) ◽  
pp. 24-34 ◽  
Author(s):  
Claire Léger ◽  
Raymond McNeil
Keyword(s):  
Nest Site ◽  
Larus Argentatus ◽  
Coniferous Tree ◽  
Phalacrocorax Auritus ◽  
Supporting Capacity ◽  
Contingency Analysis ◽  
Trunk Diameter ◽  
Nest Sites ◽  
To Come ◽  
The Stability

The periods during which cormorants build their nests in relation to various parameters describing the coniferous tree on which the nest is located (height, trunk diameter, health, supporting capacity of branches), its location with regard to the center of the colony and to areas occupied by gulls (Larus argentatus and Larus marinus), and its utilization as a nest site during previous years, were investigated using a bidimensional contingency analysis. The results reveal that the first cormorants to come back to the island in the spring choose first the coniferous trees that are located in the center of the area occupied by the colony, even if most of those trees, injured during previous years, are dead or have lost their needles. The stability of the trees (strength and diameter of trunks), the supporting capacity of branches, as well as the height and position of nests do not seem to play an important role in the choice of nest sites.

scholarly journals Population trends and status of four seabird species (Uria aalge, Alca torda, Larus fuscus, Larus argentatus) at Stora Karlsö in the Baltic Sea

Ornis Svecica ◽  
2017 ◽  
Vol 27 (2–4) ◽  
Author(s):  
Olof Olsson ◽  
Jonas Hentati-Sundberg
Keyword(s):  
Baltic Sea ◽  
Larus Argentatus ◽  
Herring Gull ◽  
Uria Aalge ◽  
The Baltic Sea ◽  
Alca Torda ◽  
Seabird Species ◽  
Larus Fuscus ◽  
The Baltic ◽  
Annual Decline

The island of Stora Karlsö hosts the largest colonies of fish-eating seabirds in the Baltic Sea. However, recent and reliable estimates of the number of breeding pairs of the main species have been missing. Based on a complete census in 2014, we estimated the number of Common Guillemots Uria aalge to 15,700 pairs, more than half (up to 70%) of the Baltic Sea population. The number has almost tripled since the early 1970s and the increase has been particularly strong the last 11 years, with an annual increase of 5.1%. We counted 24,600 individual adult Razorbills Alca torda and estimated it to correspond to a maximum of 12,300 pairs in 2015–2016 (census over two seasons). The colony has grown strongly; on average by 5.6% annually since the early 1970s, and Stora Karlsö now hosts up to 30% of the Baltic Sea population. Stora Karlsö also hosts colonies with about 300 pairs each of Lesser Black-backed Gull Larus fuscus and Herring Gull Larus argentatus. The gulls’ trends are negative, with an average annual decline the last 10-year period by 5.0% and 6.2%, respectively.

Zur Chemotaxonomie der Alkenvögel. Die Zusammensetzung der Bürzellipide des Tordalks (Alca torda), der Trottel- und Ringellume (Uria aalge) und der Gryllteiste (Cepphus grylle) / Chemotaxonomy of Alcidae. The Composition of the Uropygial Gland Fat from the Razorbill (Alca torda), Guillemot (Uria aalge) and the Blade Guillemot (Cepphus grylle)

1973 ◽  
Vol 28 (1-2) ◽  
pp. 78-82 ◽  
Author(s):  
Jürgen Jacob ◽  
Alfred Zeman
Keyword(s):  
Fatty Acids ◽  
Homologous Series ◽  
Octanoic Acid ◽  
The Other ◽  
Complex Mixtures ◽  
Uria Aalge ◽  
Uropygial Gland ◽  
Alca Torda ◽  
Cepphus Grylle ◽  
Black Guillemot

The uropygial gland fats from the razorbill, guillemot (two varieties) and the black guillemot arc very complex mixtures of ester waxes. Among the wax acids n- octanoic acid dominates followed by homologous series of 2-, 4- and 6-monomethyl-, 2,6-, 2,8-, 2,10-, 4,6-, 4,8-, 4,10-, 4,12-dimethyl- and 2,4,8-, 2,6,10-, 2,6,12-, 4,6,10- and 4,8,12-trimethyl-substituted fatty acids. The alcoholic components consist of n-, 2-, 4-, 6-, 8- and 12-monomethyl- as well as 2,6-, 2,8-, 2,10-, 4,6-, 4,8-, 4,10- and 4,12-dimethyl-branched alkanols. The black guillemot differs from the other species investigated by the occurence of fatty acids which have the first branch in 2- while the others start with the 4-position. The chemotaxonomy of the 20th order of the natural system is discussed.

The diets of common and Brünnich's guillemots Uria aalge and U. lomvia in the Barents Sea region

1997 ◽  
Vol 16 (2) ◽  
pp. 73-84 ◽  
Author(s):  
Robert T. Barrett ◽  
Vidar Bakken ◽  
Juri V. Krasnov
Keyword(s):  
Barents Sea ◽  
Uria Aalge ◽  
The Barents Sea

Common Murre (Uria aalge)

2002 ◽  
Author(s):  
David G. Ainley ◽  
David N. Nettleship ◽  
Harry R. Carter ◽  
Anne E. Storey
Keyword(s):  
Uria Aalge ◽  
Common Murre

Double-crested Cormorant (Phalacrocorax auritus)

2014 ◽  
Author(s):  
Brian S. Dorr ◽  
Jeremy J. Hatch ◽  
D. V. Weseloh
Keyword(s):  
Phalacrocorax Auritus
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