Results 11 to 20 of about 1,701,221 (334)
Foraging Strategies of Laysan Albatross Inferred from Stable Isotopes: Implications for Association with Fisheries. [PDF]
PLoS ONE, 2015 Fatal entanglement in fishing gear is the leading cause of population decline for albatross globally, a consequence of attraction to bait and fishery discards of commercial fishing operations.
Ann E Edwards +4 more
doaj +1 more source
Observational study on the breeding performance of emus (Dromaius novaehollandiae) in Brazil [PDF]
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2020 The objective of this study was to describe emus’ breeding performance in Brazil at different ages, grouped in couples or colonies. The duration of the breeding season and the production of eggs per female housed were recorded, and the productivity and ...
J.C.P. Quintero +5 more
doaj +1 more source
Population trends of common breeding birds in Germany 1990–2018
Journal of Ornithology, 2020 Biodiversity monitoring is important as it allows to prioritize research into the causes of declines and assessing the efficacy of conservation measures.
Johannes Kamp +11 more
semanticscholar +1 more source
Drones, automatic counting tools, and artificial neural networks in wildlife population censusing
Ecology and Evolution, 2021 The use of a drone to count the flock sizes of 33 species of waterbirds during the breeding and non‐breeding periods was investigated. In 96% of 343 cases, drone counting was successful.
Dominik Marchowski
doaj +1 more source
Avian Research, 2022 Determining the migration routes and connections of migratory birds at the population level helps clarify intraspecific differences in migration. Five subspecies have been recognized in the Whimbrel (Numenius phaeopus) in Eurasia. Ssp.
Fenliang Kuang +9 more
doaj +1 more source
Intra-tropical movements as a beneficial strategy for Palearctic migratory birds [PDF]
Royal Society Open Science, 2018 Migratory birds often move significantly within their non-breeding range before returning to breed. It remains unresolved under which circumstances individuals relocate, whether movement patterns are consistent between populations and to what degree the ...
Jaroslav Koleček +3 more
doaj +1 more source
Ecological specialization and population trends in European breeding birds
, 2020 Successful conservation strategies depend on the correct identification of animal species and populations at a higher risk of extinction. But not all species are equally sensitive to environmental changes.
F. Morelli +2 more
semanticscholar +1 more source
Czech Journal of Animal Science, 2019 The emu (Dromaius novaehollandiae) is considered a versatile farm species whose main by-products are meat and oil. At present, there is lack of information on the value of the meat of laying females at the end of their reproductive cycle which hampers ...
Mateusz Bucław +3 more
doaj +1 more source
Explaining individual variation in patterns of mass loss in breeding birds [PDF]
, 2006 Background Studies of birds have a disproportionate representation in the literature on life-history evolution, because of the (apparent) ease with which the costs and benefits can be quantified and manipulated. During reproduction, birds frequently show
Alasdair I Houston +5 more
core +3 more sources
Variation in female reproductive tract morphology across the reproductive cycle in the zebra finch [PDF]
PeerJ, 2020 Background In seasonally breeding birds, the reproductive tract undergoes a dramatic circannual cycle of recrudescence and regression, with oviduct size increasing 5–220 fold from the non-breeding to the breeding state.
Laura L. Hurley +3 more
doaj +2 more sources