Results 21 to 30 of about 4,808 (155)

Diet dichotomy between two migrant seabirds breeding near a high Arctic polynya [PDF]

Royal Society Open Science, 2017
High Arctic polynyas are predictable areas of open water, which offer long-distance migrant seabirds a reliable source of food during a period when they have to replenish and accumulate energy for reproduction.
Isabeau Pratte, Kelly A. Boadway, Shanti E. Davis, Mark Maftei, Mark L. Mallory   +4 more
doaj   +1 more source

Variation in Population Synchrony in a Multi-Species Seabird Community: Response to Changes in Predator Abundance. [PDF]

PLoS ONE, 2015
Ecologically similar sympatric species, subject to typical environmental conditions, may be expected to exhibit synchronous temporal fluctuations in demographic parameters, while populations of dissimilar species might be expected to show less synchrony.
Gail S Robertson, Mark Bolton, Paul Morrison, Pat Monaghan   +3 more
doaj   +1 more source

Adult survival of Arctic terns in the Canadian High Arctic

Polar Research, 2018
Arctic tern (Sterna paradisaea) populations are thought to be in decline across much of their range. For long-lived seabirds, determining adult survival rates is key to understanding current population trends and predicting trajectories.
Mark L. Mallory, Shanti E. Davis, Mark Maftei, Danielle T. Fife, Gregory J. Robertson   +4 more
doaj   +1 more source

Attendance of scavenging seabirds at trawler discards off Galicia, Spain

Scientia Marina, 2003
The occurrence of scavenger seabirds at fishing trawlers was studied off Galicia, Spain. A total of 9,368 seabirds of 23 species were recorded during 92 fishing operations in 1998 and 1999.
Julio Valeiras
doaj   +1 more source

Reactions of ground-nesting marine birds to human disturbance in the Canadian Arctic

Arctic Science, 2016
I studied the reactions of five ground-nesting marine bird species (Arctic tern (Sterna paradisaea), Sabine’s gull (Xema sabini), common eider (Somateria mollissima), long-tailed duck (Clangula hyemalis), and Ross’ gull (Rhodostethia rosea)) breeding in ...
Mark L. Mallory
doaj   +1 more source

Sterna paradisaea

, 2018
Sterna paradisaea (MGT): breeds from May to July in septentrional zones of the Holarctic and flies along the Brazilian coast when migrating to Antarctica to overwinter. When migrating south, the North American population follows the Gulf Stream as far as Europe and then flies south along the African coast, crossing once again the Atlantic at the level ...
Somenzari, Marina, Amaral, Priscilla Prudente do, Cueto, Víctor R., Guaraldo, André de Camargo, Jahn, Alex E., Lima, Diego Mendes, Lima, Pedro Cerqueira, Lugarini, Camile, Machado, Caio Graco, Martinez, Jaime, Nascimento, João Luiz Xavier do, Pacheco, José Fernando, Paludo, Danielle, Prestes, Nêmora Pauletti, Serafini, Patrícia Pereira, Silveira, Luís Fábio, Sousa, Antônio Emanuel Barreto Alves de, Sousa, Nathália Alves de, Souza, Manuella Andrade de, Telino-Júnior, Wallace Rodrigues, Whitne, Bret Myers   +20 more
openaire   +2 more sources

Diversity and abundance of water birds in a subarctic lake during three decades

Fauna Norvegica, 2013
The numbers of divers, ducks, gulls, terns and waders in the 15 km2 oligotrophic lake Takvatn, North Norway were estimated six times during 1983-2012. Systematic mapping surveys were done by boat within the first week after ice-break in June.
Anders Klemetsen, Rune Knudsen
doaj   +1 more source

Study of bird migrations under changing weather conditions to preserve arctic ecosystems. Part 1: Arctic tern (Sterna paradisaea)

Arctic and Innovations
Climate-driven changes in weather conditions have a widespread impact on bird migration timing and routes. The present study examines the annual cycle and migrations of the Arctic Tern (Sterna paradisaea), one of the dominant Arctic species.
L. Khokhlova, O. N. Mandryka
semanticscholar   +1 more source

Postbreeding dispersal and staging of Common and Arctic Terns throughout the western North Atlantic

Avian Conservation and Ecology, 2017
In the western North Atlantic, Common (Sterna hirundo) and Arctic (S. paradisaea) Terns are sympatric at breeding colonies but show divergent migration strategies to coastal areas of South America and pelagic regions of the Antarctic, respectively ...
Pamela H. Loring, Robert A. Ronconi, Linda J. Welch, Philip D. Taylor, Mark L. Mallory   +4 more
doaj   +1 more source

Blood Hemoglobin Content and Metabolic Performance of Arctic Tern Chicks Sterna paradisaea

Journal of Avian Biology, 1996
This study was designed to determine whether the development of an increased aerobic capacity (increased potential for oxygen uptake) during the initial growth stages of hatchlings is associated with an increase in blood hemoglobin content. We measured the resting (at thermoneutrality) and maximum (cold induced)b oxygen uptake of Arctic Tern chicks ...
Bech, C., Klaassen, M.
openaire   +2 more sources