scholarly journals Diversité, abondance et répartition des oiseaux aquatiques hivernant dans les eaux côtières et pélagiques du Parc marin Saguenay–Saint-Laurent

2009 ◽  
Vol 22 (2) ◽  
pp. 353-371 ◽  
Author(s):  
Jean-Pierre L. Savard
Keyword(s):  
Bucephala Clangula ◽  
Anas Rubripes ◽  
Cepphus Grylle ◽  
Mergus Serrator ◽  
Bucephala Albeola ◽  
Clangula Hyemalis

Résumé Le parc marin Saguenay–Saint-Laurent (PMSSL) est situé dans l’une des zones les plus productives de l’estuaire du Saint-Laurent et supporte des nombres importants d’oiseaux aquatiques à l’année longue. Malgré ce fait, aucune étude détaillée n’a encore été faite sur l’utilisation des habitats côtiers de cette région par l’avifaune en hiver. Pour combler cette lacune, des inventaires aériens et terrestres ont été effectués pour mieux quantifier la répartition, l’abondance et le comportement des oiseaux aquatiques hivernant dans le PMSSL. Les résultats confirment l’importance du PMSSL pour les oiseaux aquatiques hivernant dans l’estuaire du Saint-Laurent et indiquent aussi que les oiseaux se déplacent à l’intérieur du PMSSL en fonction des marées, de l’état des glaces et des vents. Les espèces de canards les plus abondantes incluent le Harelde kakawi (Clangula hyemalis), le Harle huppé (Mergus serrator), le Garrot à oeil d’or (Bucephala clangula), le Garrot d’Islande (B. islandica) et le Canard noir (Anas rubripes). Quatre espèces de goélands s’y retrouvent en abondance, soit le Goéland arctique (Larus glaucoides), bourgmestre (L. hyperboreus), argenté (L. argentatus) et marin (L. marinus). On note aussi la présence de Guillemots à miroir (Cepphus grylle) en milieu pélagique, de Bécasseaux violets (Calidris maritima) sur les îles et îlots du large et de quelques Petits Garrots (Bucephala albeola). Les données des recensements d’oiseaux de Noël suggèrent une augmentation des effectifs de Canards noirs, Canards colverts (Anas plathyrynchos), Garrots d’Islande et Harles huppés. Par contre, on a observé un nombre inférieur de Hareldes kakawis ces dernières années.

scholarly journals Nest Boxes Facilitate Local-Scale Conservation of Common Goldeneye (Bucephala clangula) and Bufflehead (Bucephala albeola) in Alberta, Canada

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
Robert M. Corrigan ◽  
Garry J. Scrimgeour ◽  
Cynthia Paszkowski
Keyword(s):  
Local Scale ◽  
Bucephala Clangula ◽  
Nest Boxes ◽  
Bucephala Albeola ◽  
Common Goldeneye

TAXONOMIC AND BIOLOGICAL OBSERVATIONS ON STREPTOCARA CALIFORNICA (GEDOELST, 1919) GEDOELST AND LIÉGEOIS, 1922 AND THE GENUS STREPTOCARA (NEMATODA: ACUARIIDAE)

1964 ◽  
Vol 42 (5) ◽  
pp. 773-783 ◽  
Author(s):  
George G. Gibson
Keyword(s):  
Life Cycles ◽  
Fourth Stage ◽  
Melanitta Perspicillata ◽  
Mergus Serrator ◽  
Bucephala Islandica ◽  
Aythya Valisineria ◽  
New Hosts ◽  
Aythya Marila ◽  
Clangula Hyemalis ◽  
Highly Evolved

A detailed redescription is presented for adults of Streptocara californica (Gedoelst, 1919) Gedoelst and Liégeois, 1922 based on specimens from under the gizzard lining of a common scoter, Oidemia nigra (L.), from Vancouver, Canada. Adult S. californica are here reported from the type host, Melanitta deglandi (Bonap.), and from the following new hosts near Vancouver: Anas platyrhynchos L., Aythya valisineria (Wilson), Bucephala islandica (Gmelin), Clangula hyemalis (L.), Melanitta perspicillata (L.), and Mergus serrator L. A description of the fourth-stage larvae is presented, based on specimens from Aythya marila (L.), Melanitta perspicillata (L.), and Mergus merganser L. from the same region. Yseria californica Gedoelst, 1919; Korjakinema gusi Oschmarin, 1950; Streptocara dogieli Belopolskaya, 1952; and Skrjabinobronema californicum (Gedoelst, 1919) Yamaguti, 1961 are considered synonyms of Streptocara californica. A comparison of the prevalence of S. californica with that of S. crassicauda charadrii Skrjabin, 1916 seems to indicate rather different life cycles for the two species. It is suggested that the genus Streptocara may be more highly evolved than the other genera of the Seuratiinae.

scholarly journals Distribution and numbers of wintering sea ducks in Swedish offshore waters

Ornis Svecica ◽  
2012 ◽  
Vol 22 (1–2) ◽  
pp. 39-59
Author(s):  
Leif Nilsson
Keyword(s):  
West Coast ◽  
The West ◽  
Sea Ducks ◽  
Aerial Surveys ◽  
Mergus Serrator ◽  
Melanitta Fusca ◽  
Clangula Hyemalis ◽  
Swedish Data

The first survey of seaducks covering the offshore waters of the entire Baltic was undertaken in 1992/1993, when, however, the Swedish waters were covered with relatively few ship surveys. The second all Baltic survey 2007–2011 included extensive aerial surveys of all Swedish offshore waters. This paper presents the Swedish data from these two surveys, supplemented with data from several other but partial surveys back to the early 1970s. The most numerous wintering seaduck in the Swedish waters was the Long-tailed Duck Clangula hyemalis with an estimated population of 1.41 million in 1992/1993, decreasing with 69% to 0.44 million in 2007–2009. Hoburg bank south of Gotland and the two Midsjö banks accounted for the vast majority of these ducks. In 2009–2011 only small numbers of scoters Melanitta fusca and M. nigra were found in Swedish Baltic waters. The totals for the Eider Somateria molissima and Red-breasted Merganser Mergus serrator were estimated at 20,000 and 8,000, respectively. Larger numbers of Eiders (50,000) and scoters (20,000) were found on the west coast.

Digenea, Nematoda, and Acanthocephala of two species of ducks from Ontario and eastern Canada

1978 ◽  
Vol 56 (3) ◽  
pp. 436-439 ◽  
Author(s):  
Shane P. Mahoney ◽  
William Threlfall
Keyword(s):  
Host Species ◽  
Parasite Species ◽  
Infected Bird ◽  
Helminth Parasites ◽  
Eastern Canada ◽  
New Host ◽  
Bucephala Clangula ◽  
Anas Rubripes ◽  
New Host Records ◽  
Age And Sex

Sixty ducks (34 Anas rubripes, 26 Bucephala clangula), collected at three localities in Ontario and eastern Canada, were examined for helminth parasites. Twenty-three genera of parasites (17 of Digenea, 5 of Nematoda, 1 of Acanthocephala) were recovered. Eighteen of the recoveries represent new host records (11 digeneans, 5 nematodes, 2 acanthocephalans).Eighty-eight percent of both host species were infected. The number of parasite species per infected bird ranged from 1–9 (mean 4) for A. rubripes and 1–7 (mean 2) for B. clangula. Preferred age and sex of host and site of infections for each parasite species was noted.

American Black Duck (Anas rubripes)

2000 ◽  
Author(s):  
Jerry R. Longcore ◽  
Daniel G. McAuley ◽  
Gary R. Hepp ◽  
Judith M. Rhymer
Keyword(s):  
Anas Rubripes ◽  
Black Duck ◽  
American Black ◽  
American Black Duck

Bufflehead (Bucephala albeola)

2014 ◽  
Author(s):  
Gilles Gauthier
Keyword(s):  
Bucephala Albeola

Black Guillemot (Cepphus grylle)

2020 ◽  
Author(s):  
Ronald G. Butler ◽  
Daniel E. Buckley ◽  
David N. Nettleship ◽  
Peter F. D. Boesman ◽  
Ernest Garcia
Keyword(s):  
Cepphus Grylle ◽  
Black Guillemot
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