Results 21 to 30 of about 2,298 (187)

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

Migratory Birds Advance Spring Arrival and Egg-Laying in the Arctic, Mostly by Travelling Faster. [PDF]

Glob Chang Biol
A warming climate is affecting the phenology of life on earth, including when birds migrate and start breeding. We show that earlier arrival is a general pattern also for birds travelling to the Arctic region, arriving earlier when snow melts early as well as with time.
Lameris TK, Boom MP, Nuijten RJM, Buitendijk NH, Eichhorn G, Ens BJ, Exo KM, Glazov PM, Hanssen SA, Hunke P, van der Jeugd HP, de Jong ME, Kölzsch A, Kondratyev A, Kruckenberg H, Kulikova O, Linssen H, Loonen MJJE, Loshchagina JA, Madsen J, Moe B, Moonen S, Müskens GJDM, Nolet BA, Pokrovsky I, Reneerkens J, Scheiber IBR, Schekkerman H, Schreven KHT, Tal T, Tulp I, Verhoeven MA, Versluijs TSL, Volkov S, Wikelski M, van Bemmelen RSA.   +35 more
europepmc   +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

Citizen scientists reveal: marine litter pollutes Arctic beaches and affects wild life [PDF]

, 2017
Recent data indicate accumulation areas of marine litter in Arctic waters and significant increases over time. Beaches on remote Arctic islands may be sinks for marine litter and reflect pollution levels of the surrounding waters particularly well.
Bergmann, Melanie, Gutow, Lars, Lutz, Birgit, Tekman, Mine Banu   +3 more
core   +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

Notes on Papuasian and Malesian stingless bees, with the descriptions of new taxa (Hymenoptera: Apidae) [PDF]

, 2019
Two new species of the stingless bee genus Heterotrigona Schwarz (Apinae: Meliponini) are described and figured from Papua New Guinea: Heterotrigona (Sahulotrigona) tricholoma Engel, new species, lighter individuals of which superficially resemble the ...
Engel, Michael S.
core   +2 more sources

A photographic approach to monitor spatial dynamics and population trends of Arctic Tern colonies in two touristic bird watching spots in the Westfjords, Iceland

Avocetta
This study examines the population dynamics and spatial distribution of Arctic Terns in two tourist sites in Iceland's Westfjords: Vigur Island and Súðavík. In 2023, counts revealed 458 terns in Súðavík and 991 in Vigur. We propose a monitoring approach
David Pierre Miles-Gaches, Alexandre Lhériau-Nice   +1 more
doaj   +1 more source

Pre-breeding foraging ecology of three tern species nesting in the Gulf of Maine

Avian Conservation and Ecology, 2022
A variety of seabird species migrate annually from wintering grounds in the Southern Hemisphere to the Gulf of Maine, USA to breed and raise their young.
Rachel M. Bratton, Henry D. Legett, Paula Shannon, Keenan C. Yakola, Alexander R. Gerson, Michelle D. Staudinger   +5 more
doaj  

Report of the Rarities Committee of the Slovak Ornithological Society/BirdLife Slovakia in 2024 [PDF]

Tichodroma
In 2024, the Rarities Committee of the Slovak Ornithological Society/BirdLife Slovakia reviewed 57 records, of which 41 were accepted in category A, 12 in category D, and three in category E. One record was not accepted.
Marian MOJŽIŠ, Stanislav HARVANČÍK, Rudolf JUREČEK, Dušan KARASKA, Dušan KERESTÚR, Miloslav MIŠÍK, Vladimír ŠRANK   +6 more
doaj   +1 more source

Conservation implications of shifting habitat use in migrating insects: Selection patterns in a threatened damselfly show that season‐specific actions are needed

Insect Conservation and Diversity, EarlyView.
Well‐preserved heathlands of NW Italy are the main overwintering habitat of Sympecma paedisca, while grassy margins in farmland are used only in summer and are avoided from autumn onwards. Grassy margins in farmland act as corridors during the species' migrations between its breeding (ricefields) and overwintering (lowland heathlands) grounds ...
Leonardo Siddi, Martina Cadin, Mattia Brambilla, Giacomo Assandri   +3 more
wiley   +1 more source