Výsledky vyhledávání - "John W. Chardine"

Population dynamics of Northern Gannets in North America, 1984-2009

Autor: Jean-François Rail, John W. Chardine, Sabina I. Wilhelm

Publikováno v: Journal of Field Ornithology. 84:187-192

Northern Gannet (Morus bassanus) colonies (N = 6) in North America have been regularly censused since the late-1960s. Monitoring populations of a top-predator like gannets provides insight into possible changes in the marine environment and contribut

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::84259d109c7436a40a9e875a8c281f54
https://doi.org/10.1111/jofo.12017

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The Morphometrics of Migrant Semipalmated Sandpipers in the Bay of Fundy: Evidence for Declines in the Eastern Breeding Population

Autor: John W. Chardine, Peter W. Hicklin

Publikováno v: Waterbirds. 35:74-82

Over 16 field seasons, between 1981 and 2006, nearly 20,000 migrant Semipalmated Sandpipers were captured, weighed, and their bills and wings measured during the fall stopover in the Bay of Fundy. Annual mean bill and wing lengths declined over the c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d56fe0b35b615daf6539465b8d7311eb
https://doi.org/10.1675/063.035.0108

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Multicolony tracking reveals the winter distribution of a pelagic seabird on an ocean basin scale

Publikováno v: Diversity and Distributions. 18:530-542

Aim: An understanding of the non-breeding distribution and ecology of migratory species is necessary for successful conservation. Many seabirds spend the non-breeding season far from land, and information on their distribution during this time is ver

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1fb35c130d575deb7a1dfa4a56758e68
https://doi.org/10.1111/j.1472-4642.2011.00864.x

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Origin of Canadian Razorbills (Alca torda) Wintering in the Outer Bay of Fundy Confirmed by Radio-Tracking

Autor: John W. Chardine, Antony W. Diamond, Travis C. R. Clarke

Publikováno v: Waterbirds. 33:541-545

In the 1990s, flocks of tens of thousands of Razorbills (Alca torda), greatly outnumbering the local breeding population and, so of unknown origin were observed wintering off the island of Grand Manan, Bay of Fundy, Canada. To determine their origin,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::88b25a57f46fd1480650cfc41e202e38
https://doi.org/10.1675/063.033.0414

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Changes in Canadian seabird populations and ecology since 1970 in relation to changes in oceanography and food webs

Autor: John W. Chardine, Gail DavorenG. Davoren, Jean-François Rail, Andrew W. BoyneA.W. Boyne, William A. Montevecchi, Antony W. Diamond, Gregory J. Robertson, Douglas F. Bertram, Anthony J. Gaston, Mark L. Mallory, April Hedd, J. Mark Hipfner, Moira J. F. Lemon

Publikováno v: Environmental Reviews. 17:267-286

Systematic monitoring of seabird populations in Canada has been ongoing since the 1920s and the monitoring of diets and other biological indicators of ecosystem change started in the 1970s. Long-term monitoring of population parameters began in the 1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c219d952461cc85c5e13583346aabbd5
https://doi.org/10.1139/a09-013

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The influence of pair-status on the breeding behaviour of the Kittiwake Rissa tridactyla before egg-laying

Autor: John W. Chardine

Publikováno v: Ibis. 129:515-526

The breeding behaviour of individually marked Kittiwakes Rissa tridactyla that retained mates from the previous year (SAME) was compared, over the period from pair-formation to egg-laying, with those that changed mates (CHANGE). Position of nest-site

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::deb0cf8d8ccb514254a73a15568247c9
https://doi.org/10.1111/j.1474-919x.1987.tb08239.x

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A device for measuring the volume of eggs: description and field evaluation

Autor: Ralph D. Morris, John W. Chardine

Publikováno v: Ibis. 128:278-282

Investigators often find it necessary to determine the volumes of bird eggs (Hoyt 1979). As direct measurement is usually difficult under field conditions, volume is usually calculated from length and breadth measurements of eggs (e.g., Coulson 1963,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0490b0b2a7583becdb24701d38a3b453
https://doi.org/10.1111/j.1474-919x.1986.tb02675.x

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