Auflistung nach Autor "Masello, Juan F."
Anzeige der Dokumente 1-20 von 47
-
A wood-concrete nest box to study burrow-nesting petrels
Bedolla-Guzmán, Yuliana; Masello, Juan F.; Aguirre-Muñoz, Alfonso; Quillfeldt, Petra (2016) -
Acute stress hyporesponsive period in nestling Thin-billed prions Pachyptila belcheri
Quillfeldt, Petra; Poisbleau, Maud; Chastel, Olivier; Masello, Juan F. (2009)When confronted with acute stressors, vertebrates show a highly conserved evolved sequence of physiological, hormonal and behavioural responses, including the activation of the hypothalamic-pituitary-adrenal axis. Many ... -
Are acoustical parameters of begging call elements of thin-billed prions related to chick condition?
Quillfeldt, Petra; Poisbleau, Maud; Mundry, Roger; Masello, Juan F. (2010)Chicks of burrowing petrels use begging calls to advertise their hunger levels when parents arrived at the nest. In a previous study, adult thin-billed prions Pachyptila belcheri responded to higher begging call rates of ... -
Behavioural plasticity in the early breeding season of pelagic seabirds : a case study of thin-billed prions from two oceans
Quillfeldt, Petra; Weimerskirch, Henri; Masello, Juan F.; Delord, Karine; McGill, Rona A. R.; Furness, Robert W.; Cherel, Yves (2019)Background: In long-lived seabirds that migrate large distances independently of each other, the early part of the breeding season is crucially important for a successful reproductive attempt. During this phase, pair bonds ... -
Birds from the endangered Monte, the steppes and coastal biomes of the province of Río Negro, northern Patagonia, Argentina
Llanos, Fabián A.; Failla, Mauricio; García, Gustavo J.; Giovine, Pablo M.; Carbajal, Mirta; González, Patricia M.; Paz Barreto, Daniel; Quillfeldt, Petra; Masello, Juan F. (2011)The main ecosystem in northern Patagonia, Argentina, is the Monte, a semi-desert scrubland home to a high biodiversity. Monte is the most endangered ecosystem of southern South America, with an annual rate of clearance of ... -
Blood and Intestinal Parasites in Wild Psittaciformes: A Case Study of Burrowing Parrots (Cyanoliseus Patagonus)
Masello, Juan F.; Choconi, R. Gustavo; Sehgal, Ravinder N.M.; Tell, Lisa; Quillfeldt, Petra (2006)Quantifying parasites is essential for understanding the ecological and evolutionary implications of parasites on their hosts. It is also crucial for many conservation attempts carried out in endangered groups of birds, ... -
Breeding biology, chick growth, and diet of the Least Storm-Petrel Oceanodroma microsoma on Islas San Benito, Mexico
Bedolla-Guzmán, Yuliana; Masello, Juan F.; Aguirre-Muñoz, Alfonso; Lavaniegos, Bertha E.; Quillfeldt, Petra (2017)The Least Storm-Petrel Oceanodroma microsoma is endemic to islands on both coasts of Baja California, in Mexico. It is the smallest seabird species and one of the least studied of the order Procellariiformes. We present a ... -
Burrowing Parrots an agricultural pest?
Pérez, M. Rita; Failla, Mauricio; Seijas, Verónica; Quillfeldt, Petra; Masello, Juan F. (2005) -
Can the intake of antiparasitic secondary metabolites explain the low prevalence of hemoparasites among wild Psittaciformes?
Masello, Juan F.; Martinez, Juan; Calderón, Luciano; Wink, Michael; Quillfeldt, Petra; Sanz, Virginia; Theuerkauf, Jörn; Ortiz-Catedral, Luis; Berkunsky, Igor; Brunton, Dianne; Díaz-Luque, José A.; Hauber, Mark E.; Ojeda, Valeria; Barnaud, Antoine; Casalins, Laura; Jackson, Bethany; Mijares, Alfredo; Rosales, Romel; Seixas, Gláucia; Serafini, Patricia; Silva-Iturriza, Adriana; Sipinski, Elenise; Vásquez, Rodrigo A.; Widmann, Peter; Widmann, Indira; Merino, Santiago (2018)BACKGROUND: Parasites can exert selection pressure on their hosts through effects on survival, on reproductive success, on sexually selected ornament, with important ecological and evolutionary consequences, such as changes ... -
Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions
Quillfeldt, Petra; Masello, Juan F. (2020) -
Corticosterone at fledging depends on nestling condition, not on parental desertion
Quillfeldt, Petra; Poisbleau, Maud; Schwabl, Ingrid; Chastel, Olivier; Masello, Juan F. (2010)In some burrow-nesting birds, fledging is preceded by a strong rise in circulating corticosterone levels. Because the parents may desert nestlings in these species, this rise may be internally triggered or it may be a ... -
¿Cómo reproducirse exitosamente en un ambiente cambiante? Biología reproductiva del loro barranquero (Cyanoliseus patagonus) en el noreste de la Patagonia
Masello, Juan F.; Quillfeldt, Petra (2012)Durante más de 14 años se ha estudiado la biología reproductiva de una población de Loro Barranquero (Cyanoliseus patagonus) en el noreste de la Patagonia, Argentina. En este trabajo se revisan los resultados obtenidos en ... -
Diet composition of wild columbiform birds: next-generation sequencing of plant and metazoan DNA in faecal samples
Schumm, Yvonne R.; Masello, Juan F.; Vreugdenhil-Rowlands, Jennifer; Fischer, Dominik; Hillerich, Klaus; Quillfeldt, Petra (2023)Accurate knowledge of a species’ diets is fundamental to understand their ecological requirements. Next-generation sequencing technology has become a powerful and non-invasive tool for diet reconstruction through DNA ... -
Differences in stable isotopes in blood and feathers of seabirds are consistent across species, age and latitude: implications for food web studies
Quillfeldt, Petra; Bugoni, Leandro; McGill, Rona A.R.; Masello, Juan F.; Furness, Robert W. (2008)Stable isotopes of growing feathers and blood both represent assimilated diet, and both tissues are used to study the diet and foraging distribution of marine and terrestrial birds. Although most studies have assumed that ... -
Distribution patterns predict individual specialization in the diet of dolphin gulls
Masello, Juan F.; Wikelski, Martin; Voigt, Christian C.; Quillfeldt, Petra (2013)Many animals show some degree of individual specialization in foraging strategies and diet. This has profound ecological and evolutionary implications. For example, populations containing diverse individual foraging ... -
Diving seabirds share foraging space and time within and among species
Masello, Juan F.; Mundry, Roger; Poisbleau, Maud; Demongin, Laurent; Voigt, Christian C.; Wikelski, Martin; Quillfeldt, Petra (2010)Ecological theory predicts that animals with similar foraging strategies should not be able to coexist without segregating either in space, time or diet. In communities, intra-specific competition is thought to be more ... -
Does genetic structure reflect differences in non-breeding movements? A case study in small, highly mobile seabirds
Quillfeldt, Petra; Moodley, Yoshan; Weimerskirch, Henri; Cherel, Yves; Delord, Karine; Phillips, Richard A.; Navarro, Joan; Calderón, Luciano; Masello, Juan F. (2017)Background: In seabirds, the extent of population genetic and phylogeographic structure varies extensively among species. Genetic structure is lacking in some species, but present in others despite the absence of obvious ... -
Education benefits largest parrot colony
Masello, Juan F.; Quillfeldt, Petra (2005) -
Evaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguins
Ludynia, Katrin; Dehnhard, Nina; Poisbleau, Maud; Demongin, Laurent; Masello, Juan F.; Quillfeldt, Petra (2012)Logger technology has revolutionised our knowledge of the behaviour and physiology of free-living animals but handling and logger attachments may have negative effects on the behaviour of the animals and their welfare. We ... -
Flexible foraging behaviour of a sexually dimorphic seabird: large males do not always dive deep
Quillfeldt, Petra; Schroff, Simone; Noordwijk, Hendrika J. van; Michalik, Andreas; Ludynia, Katrin; Masello, Juan F. (2011)Sex differences in foraging behaviour have been explained by size dimorphism and/or avoidance of inter-sexual competition for depletable resources. To distinguish between these 2 hypotheses, we examined how intrinsic factors ...