Clangula hyemalis: BirdLife International

2016 ◽  
Author(s):  
Keyword(s):  
Clangula Hyemalis

scholarly journals Redescription of Echinuria hypognatha Wehr, 1937 (Nematoda; Acuariidae) including ecology and new hosts

2012 ◽  
Vol 49 (2) ◽  
pp. 82-86 ◽  
Author(s):  
K. Kavetska ◽  
A. Stapf ◽  
K. Królaczyk ◽  
E. Kalisińska
Keyword(s):  
Digestive Tract ◽  
General Information ◽  
Eastern Siberia ◽  
Anatomical Features ◽  
Ecological Characteristics ◽  
New Hosts ◽  
Northwestern Poland ◽  
Clangula Hyemalis

AbstractReports on the presence of Echinuria hypognatha Wehr, 1937 in Europe have so far provided only general information, and therefore we present further morphometric and ecological characteristics of this parasite. In this study, the examined nematodes were isolated from the digestive tract of 1 005 wild ducks, representing 17 species from the northwestern Poland. The anatomical features of the parasite were in principle consistent with the description of the species by its discoverer and reports in the available literature. Nematodes (505 individuals) were found in 2.5 % of the examined ducks, in five species wintering in Poland: Clangula hyemalis, Melanitta nigra, M. fusca, Mergellus albellus and Aythya fuligula. The exclusive locations of the nematode were the glands in the proventriculus. The highest incidence was recorded in Melanitta ducks, and the presence of this nematode only in birds wintering in Poland indicates that E. hypognatha is brought to Poland by birds migrating from the areas of Eastern Siberia.

scholarly journals A rare sighting of the Long-tailed Duck Clangula hyemalis (Linnaeus, 1758) (Aves: Anseriformes: Anatidae) over a four-week period in northwestern India: first detailed scientific documentation in 73 years

2017 ◽  
Vol 9 (8) ◽  
pp. 10631
Author(s):  
Pushpinder S. Jamwal ◽  
Pankaj Chandan ◽  
Rohit Rattan
Keyword(s):  
North America ◽  
The Third ◽  
Northwestern India ◽  
Conservation Actions ◽  
Scientific Documentation ◽  
Clangula Hyemalis

The Long-tailed Duck Clangula hyemalis is a circumpolar species, breeding in North America, Europe and Asia, however, it is currently among the rarest ducks in Asia, and assessed as globally Vulnerable. Conservation actions explicitly include improved monitoring efforts in Asia.  We report the second sighting of this species at the Gharana Wetland Reserve the third in northwestern India, in over 73 years, and have carefully documented our findings over four weeks.

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.

Duckling production of the Oldsquaw in relation to spring weather and small-rodent fluctuations

1986 ◽  
Vol 64 (9) ◽  
pp. 1835-1841 ◽  
Author(s):  
Olof Pehrsson
Keyword(s):  
Reproductive Output ◽  
Climatic Factors ◽  
Small Rodent ◽  
Time Of Arrival ◽  
Northern Sweden ◽  
Small Rodents ◽  
Brood Production ◽  
Ephemeral Lakes ◽  
Alternative Prey Hypothesis ◽  
Clangula Hyemalis

The duckling production of the Oldsquaw (Clangula hyemalis) was studied between 1969 and 1974 in Torne Lapmark in northern Sweden. The degrees of relationship among various indices of reproductive output, climatic factors, and fluctuations in small rodents were estimated. Total brood and duckling production were calculated. A correlation between first observations of broods and time of arrival of spring indicated that the Oldsquaw breeds as early as possible, an adaptation to the utilization of ephemeral lakes. Peaks in duckling production correlated well with peaks in the abundance of small rodents but not as well with climatic variables. Twice as many ducklings were produced during the rodent peak years as during the intervening years, and the densities of the Oldsquaw population were highest the year after these peaks in brood production. The positive correlation between duckling production and population size in small rodents seems to be analogous to grouse–rodent cycles, and both are best explained by the predator-shift or the alternative prey hypothesis.

scholarly journals Gut Morphometrics in the Long-Tailed Duck Clangula Hyemalis Wintering on the Polish Baltic Coast

2008 ◽  
Vol 53 (1-4) ◽  
pp. 37-47
Author(s):  
Ewa Działa-Szczepańczyk
Keyword(s):  
Body Size ◽  
Body Length ◽  
The Body ◽  
Adult Males ◽  
Morphometric Characters ◽  
Baltic Coast ◽  
Intestine Length ◽  
Autumn And Winter ◽  
Clangula Hyemalis ◽  
Sternum Length

Gut Morphometrics in the Long-Tailed DuckClangula HyemalisWintering on the Polish Baltic CoastThe study included guts of 140 individuals of the long-tailed duckClangula hyemalisobtained in autumn and winter of 1993-2000 in the western part of the Polish Baltic Coast. The following morphometric characters were analysed: duodenum length (DL), combined jejunum and ileum length (JIL), small intestine length (SIL), combined terminal intestine and cloaca length (TCL), and combined length (CBL) and weight (CBW) of both caeca. In the analysis the birds' sex and age were taken into consideration, as well as their body size characterised by body weight, body length, and sternum length. Ontogenetic differences in the gut morphometric characters were more pronounced in males than in females, and immature drakes were characterised by higher average values of JIL and CBW, compared to adult males. Besides the CBL and CBW, sexual dimorphism was manifest in the body size and other gut measurements - those parameters achieved higher average values in males than in females. No such differences were recorded with respect to relative parameters: DL, SIL, and TCL expressed as the percentage of the birds' body length. In case of JIL, CBL, and CBW no relation with any of the body size parameters was found. No relevant relations between SIL and JIL, and the measurements of CBL and TCL were noticed.

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