Green-winged Teal (Anas crecca)

1995 ◽  
Author(s):  
Kevin Johnson
Keyword(s):  
Anas Crecca

Видовой состав фауны эндопаразитов диких птиц отряда Пластинчатоклювые (Anseriformes) в регионе Северного Кавказа

2015 ◽  
pp. 36-38
Author(s):  
Вагид Шарапудинович Пашаев ◽  
Анатолий Мурашевич Биттиров ◽  
Црай Бесланович Кагермазов
Keyword(s):  
Anser Anser ◽  
Anas Crecca ◽  
Mergus Merganser ◽  
Anas Strepera ◽  
Anser Erythropus

В статье приведены сведения о видовом составе эндопаразитофауны у семи видов птиц отряда Пластинчатоклювые (Anseriformes) в регионе Северного Кавказа. У видов Anser anser L., Anser erythropus, Anas platyrhynehos L., Anas strepera L., Anas crecca L., Tadorna tadorna L., Mergus merganser L. определено 13 видов рода эймерия, 116 видов био- и геогельминтов, в том числе: Trematoda — 87 видов, Cestoda — 14 видов, Nematoda — 10 видов, Acantocephala — 5 видов с тенденцией формирования в организме птиц простых и сложных многокомпонентных паразитокомплексов. Исследования проводили в 2006 – 2014 гг. на базах ФГУ «Эльбрусский национальный парк», ФГУ «Кабардино-Балкарский государственный высокогорный заповедник», в 12 охотничьих хозяйствах и участках Кабардино-Балкарской Республики и Республики Дагестан на диких и синантропных птицах разного возраста. Паразитологическим исследованиям подвергнуты семь видов диких птиц отряда Пластинчатоклювые (всего 660 особей): серый гусь Anser anser L. — 110 особей, малый белолобый гусь Anser erythropus — 95 особей, обыкновенная кряква Anas platyrhynehos L. — 216 особей, серая утка Anas strepera L. — 100 особей, чирок-свистунок Anas crecca L. — 45 особей, пеганка Tadorna tadorna L. — 76 особей, большой крохаль Mergus merganser L. — 18 особей. Для изучения видовой структуры эндопаразитов применяли методы полного и неполного гельминтологического вскрытия. Использованы статистические методы дисперсионного анализа; вычисления выполнены с помощью программы Statistica 6.0.

Experimental functional response and inter-individual variation in foraging rate of teal (Anas crecca)

2007 ◽  
Vol 75 (1) ◽  
pp. 66-71 ◽  
Author(s):  
C. Arzel ◽  
M. Guillemain ◽  
D.B. Gurd ◽  
J. Elmberg ◽  
H. Fritz ◽  
...  
Keyword(s):  
Functional Response ◽  
Individual Variation ◽  
Anas Crecca ◽  
Foraging Rate

Effect of Weekly Hunting Frequency on Rate of Ducks Harvested

2014 ◽  
Vol 6 (1) ◽  
pp. 247-254
Author(s):  
Elizabeth A. St. James ◽  
Michael L. Schummer ◽  
Richard M. Kaminski ◽  
Edward J. Penny ◽  
L. Wesley Burger
Keyword(s):  
North America ◽  
Wildlife Management ◽  
Anas Platyrhynchos ◽  
Public Lands ◽  
Anas Crecca ◽  
Waterfowl Hunting ◽  
Anas Clypeata ◽  
Hunting Frequency ◽  
Wildlife Management Areas ◽  
The Relationship

Abstract Waterfowl hunting is important culturally and economically in North America. Few studies have evaluated the relationship between weekly hunting frequency and rate of ducks harvested. We evaluated the effect of hunting 2 or 4 d/wk on rate of ducks harvested on three Mississippi Wildlife Management Areas, USA, during three waterfowl hunting seasons, December–January 2008–2011. Harvest of all ducks combined, mallard Anas platyrhynchos, northern shoveler Anas clypeata, or green-winged teal Anas crecca per hunter day did not differ between areas hunted 2 or 4 d/wk, but increased with hours spent afield. We suggest Wildlife Management Areas may be hunted 4 d/wk without reducing duck harvest per hunter day. We recommend continued evaluations of weekly hunting frequency on rate of ducks harvested to sustain science-guided management of waterfowl hunting on Mississippi public lands and elsewhere.

Sleep-vigilance trade-off in Green-winged Teals (Anas crecca crecca)

1998 ◽  
Vol 76 (12) ◽  
pp. 2214-2218 ◽  
Author(s):  
Michel Gauthier-Clerc ◽  
Alain Tamisier ◽  
Frank Cezilly
Keyword(s):  
Trade Off ◽  
Anas Crecca

Avian schistosomes in French aquatic birds: a molecular approach

2009 ◽  
Vol 83 (2) ◽  
pp. 181-189 ◽  
Author(s):  
D. Jouet ◽  
H. Ferté ◽  
C. Hologne ◽  
M.L. Kaltenbach ◽  
J. Depaquit
Keyword(s):  
First Record ◽  
Aquatic Birds ◽  
Anser Anser ◽  
Anas Crecca ◽  
Cygnus Olor ◽  
Natural Hosts ◽  
Anas Clypeata ◽  
Grus Grus ◽  
Second Internal Transcribed Spacer ◽  
The Impact

AbstractThe prevalence of human cercarial dermatitis (HCD) caused by bird schistosomes appears to be increasing in France, in light of the impact of tourism combined with high densities of wild aquatic hosts in freshwater areas. The present work expands our knowledge of schistosome systematics by including samples of bird schistosomes collected from their natural hosts in France. Heads (318) and viscera (81) of aquatic birds belonging to 16 species from five orders, collecting during the hunting seasons or found dead, were autopsied for nasal and visceral schistosomes. Eggs and/or adults were analysed by molecular methods using the D2 domain and the second internal transcribed spacer (ITS-2) region of rDNA to determine species. Even if nasal eggs were polymorphic according to the host, all haplotypes were similar to that of Trichobilharzia regenti. Marked diversity of visceral species was observed. Final hosts under natural conditions were reported. For the first time, Trichobilharzia franki is reported in its natural bird hosts, Anas platyrhynchos, Anas crecca, Aythya fuligula and Cygnus olor. We also identified T. szidati in A. crecca and Anas clypeata. Bilharziella polonica was found in six species of aquatic birds, including Grus grus. This finding is the first record of bird schistosomes in this aquatic bird. Three new taxa of visceral schistosomes in Anser anser are strongly suspected according to their haplotypes. Futhermore, a new haplotype of visceral schistosomes isolated in Cygnus olor and similar to Allobilharzia visceralis was identified.

MORTALITY AND KILL AMONGST BRITISH-RINGED TEAL ANAS CRECCA.

Ibis ◽  
2008 ◽  
Vol 99 (2) ◽  
pp. 157-177 ◽  
Author(s):  
Hugh Boyd
Keyword(s):  
Anas Crecca

scholarly journals A flyway perspective of foraging activity in Eurasian Green-winged Teal, Anas crecca crecca

2007 ◽  
Vol 85 (1) ◽  
pp. 81-91 ◽  
Author(s):  
C. Arzel ◽  
J. Elmberg ◽  
M. Guillemain
Keyword(s):  
Early Spring ◽  
Breeding Strategy ◽  
Foraging Activity ◽  
Long Distance ◽  
Time Activity ◽  
Anas Crecca ◽  
Income Breeding ◽  
Nocturnal Foraging ◽  
Anas Clypeata ◽  
Foraging Time

Time–activity budgets in the family Anatidae are available for the wintering and breeding periods. We present the first flyway-level study of foraging time in a long-distance migrant, the Eurasian Green-winged Teal, Anas crecca crecca L., 1758 (“Teal”). Behavioral data from early and late spring staging, breeding, and molting sites were collected with standardized protocols to explore differences between the sexes, seasons, and diel patterns. Teal foraging activity was compared with that of the Mallard, Anas platyrhynchos L., 1758 and Northern Shoveler, Anas clypeata L., 1758, and the potential effects of duck density and predator-caused disturbance were explored. In early spring, foraging time was moderate (50.5%) and mostly nocturnal (45%). It increased dramatically in all three species at migration stopovers and during molt, mostly because of increased diurnal foraging, while nocturnal foraging remained fairly constant along the flyway. These patterns adhere to the “income breeding” strategy expected for this species. No differences between the sexes were recorded in either species studied. Teal foraging time was positively correlated with density of Teal and all ducks present, but negatively correlated with predator disturbance. Our study suggests that Teal, in addition to being income breeders, may also be considered as income migrants; they find the energy necessary to migrate at staging sites along the flyway.

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