7 documents found, page 1 of 1
The effect of climate change on avian offspring production: A global meta-analysis
Halupka, Lucyna; Arlt, Debora; Tolvanen, Jere; Millon, Alexandre; Bize, Pierre; Adamík, Peter; Albert, Pascal; Arendt, Wayne J.; Artemyev, Alexander V.Climate change affects timing of reproduction in many bird species, but few studies have investigated its influence on annual reproductive output. Here, we assess changes in the annual production of young by female breeders in 201 populations of 104 bird species (N = 745,962 clutches) covering all continents between 1970 and 2019. Overall, average offspring production has declined in recent decades, but conside...
Genomic basis of insularity and ecological divergence in barn owls (Tyto alba) ...
Cumer, Tristan; Machado, Ana Paula; Siverio, Felipe; Cherkaoui, Sidi Imad; Roque, Inês; Lourenço, Rui; Charter, Motti; Roulin, Alexandre; Goudet, GeromeIslands, and the particular organisms that populate them, have long fascinated biologists. Due to their isolation, islands offer unique opportunities to study the effect of neutral and adaptive mechanisms in determining genomic and phenotypical divergence. In the Canary Islands, an archipelago rich in endemics, the barn owl (Tyto alba), present in all the islands, is thought to have diverged into a subspecies (...
A First Record of Organochlorine Pesticides in Barn Owls (Tyto alba) from Portu...
Roque, Inês; Lourenço, Rui; Marques, Ana; Martínez-López, Pilar; Espín, Silvia; Gómez-Ramirez, Pilar; García-Fernández, Antonio Juan; Roulin, AlexandreWe evaluated feathers as a non-destructive biomonitoring tool documenting organochlorine pesticides (OCP) in liver and checked possible trends in pesticide use in two areas based on OCP concentrations in barn owls (Tyto alba). We measured the concentrations of 16 OCP in 15 primary feathers and 15 livers from barn owl carcasses collected on roadsides in Tagus Valley and Évora regions, south Portugal. Total OCP m...
A First Record of Organochlorine Pesticides in Barn Owls (Tyto alba) from Portu...
Roque, Inês; Lourenço, Rui; Marques, Ana; Martínez-López, Emma; Espín, Silvia; Gómez-Ramirez, Pilar; García-Fernández, Antonio J.; Roulin, AlexandreWe evaluated feathers as a non-destructive biomonitoring tool documenting organochlorine pesticides (OCP) in liver and checked possible trends in pesticide use in two areas based on OCP concentrations in barn owls (Tyto alba). We measured the concentrations of 16 OCP in 15 primary feathers and 15 livers from barn owl carcasses collected on roadsides in Tagus Valley and Évora regions, south Portugal. Total OCP m...
Monitoring organochlorine compounds in feathers and livers of Barn Owls Tyto al...
Roque, Inês; Lourenço, Rui; Marques, Ana; Martinez-López, E.; Espin, S.; Garcia-Fernandez, A.J.; Rabaça, João E.; Roulin, AlexandreOrganochlorine compounds (OC) include the most prevalent synthetic pesticides that have been broadly used in agriculture in the second half of the 20th century. Given its preference for farmland hunting grounds the Barn Owl Tyto alba is a good candidate to biomonitor the potential health risks of OC to humans and wildlife. We evaluated the efficacy of Barn Owl feathers and livers for monitoring OC and sex and a...
Barn owl feathers as biomonitors of mercury: sources of variation
Roque, Inês; Lourenço, Rui; Marques, Ana; Coelho, João P.; Coelho, Cláudia; Pereira, Eduarda; Rabaça, João E.; Roulin, AlexandreGiven their central role in mercury (Hg) excretion and suitability as reservoirs, bird feathers are useful Hg biomonitors. Nevertheless, the interpretation of Hg concentrations is still questioned as a result of a poor knowledge of feather physiology and mechanisms affecting Hg deposition. Given the constraints of feather availability to ecotoxicological studies, we tested the effect of intraindividual differen...
As aves de rapina noturnas como indicadoras de contaminação ambiental
Roque, Inês; Marques, Ana; Lourenço, Rui; Coelho, João P.; Coelho, Cláudia; Pereira, M.ª Eduarda; Rabaça, João E.; Roulin, AlexandreNeste trabalho foram recolhidas penas corporais (do peito) de 45 juvenis de coruja-das-torres em ninhos localizados no Vale do Tejo, bem como penas corporais, primárias e secundárias de indivíduos no primeiro ano de vida e de adultos (53 corujas-das-torres e 28 de corujas-do-mato), provenientes de cadáveres recolhidos em estradas no Ribatejo e Alentejo. Os valores médios de contaminação por mercúrio (em mg/kg d...