Results 91 to 100 of about 873 (260)

Population dynamics and reproductive success of Short‐eared Owls in relation to widely fluctuating food abundance and farmland habitat degradation

open access: yesIbis, EarlyView.
Populations of the Short‐eared Owl Asio flammeus have declined across Europe and North America, probably in response to habitat degradation driven by agricultural intensification. However, long‐term evidence linking farmland habitat change to variation in breeding density and reproductive success remains limited.
Erkki Korpimäki   +2 more
wiley   +1 more source

Emigrantes indocumentados y deportados residentes en el estado de México

open access: yesPapeles de Población, 2003
Tomando como base información de dos encuestas elaboradas en El Colegio de la Frontera Norte, en el presente trabajo se describen las características de dos grupos de emigrantes internacionales mexiquenses altamente vulnerables: los indocumentados y
María Eugenia Anguiano Téllez
doaj  

A longitudinal study of avian pox in a small passerine, the Dunnock (Prunella modularis)

open access: yesIbis, EarlyView.
Long‐term, longitudinal studies of disease in wild bird populations are rare. Diseases are important determinants of bird survival and may spill‐over into other species including livestock and, in some cases, humans. Avian pox is a globally distributed disease, resulting from infection by viruses in the genus Avipoxvirus (APV).
Denise C. Wawman   +5 more
wiley   +1 more source

Is urbanisation a barrier to genetic diversity in the solitary specialist bee, Melissodes druriellus?

open access: yesInsect Conservation and Diversity, EarlyView.
Bees are integral pollinators commonly found in and supported by urban green spaces; however, their eco‐evolutionary response to urbanisation varies interspecifically. While several studies have explored the population and landscape genetics of bees in response to urbanisation, few have examined solitary or specialist species which may be more ...
Anthony C. Ayers   +3 more
wiley   +1 more source

Dispersal mediates metapopulation response to local and regional stressors

open access: yesInsect Conservation and Diversity, EarlyView.
A feature of recent insect declines is that widespread, formerly common species are among the worst affected. We designed a metapopulation simulation to ask how dispersal capability interacts with landscape and population stressors that act at different spatial scales.
Christopher A. Halsch   +2 more
wiley   +1 more source

Seeking Access to Long-Term Care: Legal Consciousness of Dutch Retirement Migrants on the Costa Blanca

open access: yesOñati Socio-Legal Series, 2012
As EU citizens, Dutch retirement migrants can move and reside freely within the European Union. This enables their fluid migratory pattern and the formation of transnational ties between the Netherlands and Spain.
Anoeshka Gehring
doaj  

Population structure of the last Tomares nogelii (Lepidoptera, Lycaenidae) population in the European Union—A capture‐mark‐recapture study

open access: yesInsect Conservation and Diversity, EarlyView.
A capture–mark–recapture study in 2025 revealed a metapopulation with a pronounced core–peripheral structure and substantial differences in local population size and phenology. Most imagines remained within local host plant patches, but rare long‐distance movements by females maintain functional connectivity among colonies.
Paulo von der Wense Goncalves   +5 more
wiley   +1 more source

Do the biological characteristics of trout (Salmo trutta) smolts influence their spring migration timing and maiden marine sojourn duration?

open access: yesJournal of Fish Biology, EarlyView.
Abstract Anadromous salmonids migrate seaward to exploit feeding and growth opportunities in marine habitats, yet how smolt biological characteristics influence their marine migratory behavior remains poorly understood. This study used 9 years of trout (Salmo trutta) population monitoring data from 15,595 tagged age‐0+ parr, 1033 smolts detected ...
Jonathan P. Gillson   +11 more
wiley   +1 more source

España en la Argentina. Una reflexión sobre patriotismo español en el tránsito del siglo XIX al XX

open access: yesAnuario IEHS, 2003
El presente artículo se propone un estudio sobre el patriotismo español en el Río de la Plata a fines del siglo XIX y principios del XX, explorando la patria como narración y la nación como símbolo que activa la movilización política.
Ángel Duarte
doaj  

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