scholarly journals Agricultural destruction of Northern Pintail nests on cropland in prairie Canada

2018 ◽  
Vol 13 (2) ◽  
Author(s):  
David C. Duncan ◽  
James H. Devries
Keyword(s):  
Northern Pintail

Abdominal hernia in a Northern Pintail Anas acuta as revealed by necropsy, radiography, and X-ray computed tomography

2007 ◽  
Vol 6 (2) ◽  
pp. 137-140 ◽  
Author(s):  
Akira CHIBA ◽  
Ryuhei HONMA ◽  
Michio TOYAMA ◽  
Mitsuhiro WATANABE
Keyword(s):  
Computed Tomography ◽  
Abdominal Hernia ◽  
Anas Acuta ◽  
Northern Pintail ◽  
X Ray ◽  
X Ray Computed

scholarly journals Stable Isotope Analysis of Northern Pintail (Anas acuta) Feathers Wintering on Junam Reservoir

2014 ◽  
Vol 26 (13) ◽  
pp. 4063-4066
Author(s):  
Kahee Jeong ◽  
In-Ae Bae ◽  
Jong-Yun Kim ◽  
Kyuseok Song ◽  
Si-Wan Lee ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Anas Acuta ◽  
Northern Pintail

Recreation economics to inform migratory species conservation: Case study of the northern pintail

2018 ◽  
Vol 206 ◽  
pp. 971-979 ◽  
Author(s):  
Brady J. Mattsson ◽  
James A. Dubovsky ◽  
Wayne E. Thogmartin ◽  
Kenneth J. Bagstad ◽  
Joshua H. Goldstein ◽  
...  
Keyword(s):  
Species Conservation ◽  
Migratory Species ◽  
Northern Pintail

Surveillance and Characterization of Newcastle Disease Viruses Isolated from Northern Pintail (Anas acuta) in Japan During 2006–09

2011 ◽  
Vol 55 (2) ◽  
pp. 230-235 ◽  
Author(s):  
Sakchai Ruenphet ◽  
Alam Jahangir ◽  
Dany Shoham ◽  
Kae Morikawa ◽  
Yuki Miyoshi ◽  
...  
Keyword(s):  
Newcastle Disease ◽  
Anas Acuta ◽  
Northern Pintail

Replacement Cost Valuation of Northern Pintail (Anas acuta) Subsistence Harvest in Arctic and Sub-Arctic North America

2014 ◽  
Vol 19 (4) ◽  
pp. 347-354 ◽  
Author(s):  
Joshua H. Goldstein ◽  
Wayne E. Thogmartin ◽  
Kenneth J. Bagstad ◽  
James A. Dubovsky ◽  
Brady J. Mattsson ◽  
...  
Keyword(s):  
North America ◽  
Replacement Cost ◽  
Anas Acuta ◽  
Northern Pintail

Seasonal patterns of LH, testosterone and semen quality in the Northern pintail duck (Anas acuta)

2000 ◽  
Vol 12 (4) ◽  
pp. 229 ◽  
Author(s):  
L. M. Penfold ◽  
D. E. Wildt ◽  
T. L. Herzog ◽  
W. Lynch ◽  
L. Ware ◽  
...  
Keyword(s):  
Breeding Season ◽  
Semen Quality ◽  
Sperm Concentration ◽  
Day Length ◽  
Seasonal Patterns ◽  
Sperm Production ◽  
Normal Morphology ◽  
Northern Pintail ◽  
Sperm Trait ◽  
Percent Normal

This study characterized seasonal changes in circulating LH and testosterone and in semen production and quality in the Northern pintail duck. Plasma LH and testosterone were measured in blood samples collected weekly throughout the year from eight males exposed to natural fluctuations in day length and temperature. Semen quality was evaluated weekly in these same males from April–June, the months when spermatozoa were produced. Semen quality (based on sperm concentration and normal morphology) peaked 0–2 weeks after sperm production onset and decreased sharply before sperm production cessation in late June. Nadir LH concentrations were measured in July and August with peak LH observed in May and November. There were clear seasonal patterns in circulating testosterone with July–September values being less (P<0.05) than October–December which, in turn, were less (P<0.05) than January–March. Maximal circulating testosterone (P<0.05) occurred during April–June, coincident with semen production. Weekly circulating LH during the breeding season was directly related to testosterone concentrations (P<0.01), but was not correlated to any specific semen or sperm trait (P>0.05). Testosterone concentrations throughout the breeding season were correlated (P<0.05) to total numbers of spermatozoa produced (volume cell concentration) and percent normal sperm morphology. In summary, the Northern pintail experiences seasonal hormone fluctuations, with maximum circulating testosterone coinciding with peak ejaculate quality reflected by the production of high numbers of morphologically normal spermatozoa.

Surveillance and Characterization of Newcastle Disease Viruses Isolated from Northern Pintail (Anas acuta) in Japan During 2006–09

2011 ◽  
Vol 6 (2) ◽  
pp. e9-e10
Author(s):  
Sakchai Ruenphet ◽  
Alam Jahangir ◽  
Dany Shoham ◽  
Kae Morikawa ◽  
Yuki Miyoshi ◽  
...  
Keyword(s):  
Newcastle Disease ◽  
Anas Acuta ◽  
Northern Pintail

scholarly journals Evaluation of the extent of wetland birds in District Kaithal, Haryana, India

2010 ◽  
Vol 2 (1) ◽  
pp. 77-84 ◽  
Author(s):  
Rohtash Chand Gupta ◽  
Tirshem Kumar Kaushik ◽  
Surjit Kumar
Keyword(s):  
Single Individual ◽  
Wetland Birds ◽  
Anas Acuta ◽  
Northern Pintail ◽  
North West ◽  
Anas Crecca ◽  
Anas Clypeata ◽  
Large Groups ◽  
Common Teal ◽  
Common Pochard

Kaithal District is comprised of 2317 Km² Sq. Km area having six blocks Viz.:Kaithal, Kalayat, Pundri, Rajound, Ghula and Siwan located at a distance of 150 Kms from New Delhi toward North West. Its geographical position lies between 29° 48' 0 N latitude and between 76° 22' 60 E longitude.The present studies were carried between 2005-2008 with the help of Zenith Camera and telelens. In all, 63 species of Wetland birds belonging to 10 Orders, 38 genera and 16 families were observed in various village ponds in Kaithal District. Out of 63 species of wetland birds, 31 are winter migratory, 9 local migratory, 3 summers migratory and 20 species are resident birds. Considering IUCN categories, Black Ibis (Pseudibis papillosa) which belongs to Biome Restricted Species (BRS) was observed in three blocks viz. Kaithal, Pundri and Rajound of Kaithal district. In addition, Spotted Greenshank (Tringa guttifer) which has been placed in endangered category of IUCN was observed as single individual. But Black Ibis (Pseudibis papillosa) was observed in a group of three to seven. Northern Shoveller (Anas clypeata), which is reportedly coming from Central Russia and Caspian Siberia has been observed in very large groups of 200-250 and virtually spotted in each and every pond in Northern Haryana. Similarly, Northern Pintail (Anas acuta), Common Teal (Anas crecca), Common Pochard (Aythya ferina), Spot-billed Duck (Anas poecilorhyncha), Lesser-whistling Teal (Dendrocygna javanica) were also seen in relatively large groups. Common Pochard (Aythya ferina) is always observed in pure groups floating in the centre of relatively big ponds. In contrast, Gadwall (Anas strepera), Northern Shoveller (Anas clypeata), Northern Pintail (Anas acuta) and Common Teal (Anas crecca), share close proximity with each other in water and are found in mixed groups. Northern Shoveller (Anas clypeata), Bar- headed Goose (Anser indicus) and Northern Pintail (Anas acuta) stay between Octobers to April. Mallard (Anas platyrhynchos) stays in winter for shortest period between December and January. Maximum wetland birds observed in Kaithal District belong to Order Charadriiformes and to family Anatidae of Order Anseriformes. Spotted Greenshank (Tringa guttifer) is the peculiar to Pundri block only, in Kaithal District.

Northern Pintail (Anas acuta)

2014 ◽  
Author(s):  
Robert G. Clark ◽  
Joseph P. Fleskes ◽  
Karla L. Guyn ◽  
David A. Haukos ◽  
Jane E. Austin ◽  
...  
Keyword(s):  
Anas Acuta ◽  
Northern Pintail
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