Results 31 to 40 of about 2,821 (239)

Unprecedented heat mortality of Magellanic Penguins [PDF]

Ornithological Applications, 2022
AbstractExtreme weather events are becoming more frequent and severe, leading to an increase in direct, adverse thermoregulatory impacts on wildlife. Here, we document an unprecedented, single-day, heat-related mortality event of Magellanic Penguins (Spheniscus magellanicus) at Punta Tombo, Chubut Province, Argentina, one of the largest breeding ...
Katie A Holt, P Dee Boersma
openaire   +1 more source

Occurrence and Quantification of Antimicrobial Resistance Genes in the Gastrointestinal Microbiome of Two Wild Seabird Species With Contrasting Behaviors

Frontiers in Veterinary Science, 2021
Antimicrobial resistance genes (ARGs) are environmental pollutants and anthropization indicators. We evaluated human interference in the marine ecosystem through the ocurrence and quantification (real-time PCRs) of 21 plasmid-mediated ARGs in enema ...
Ana Carolina Ewbank, Fernando Esperón, Carlos Sacristán, Irene Sacristán, Elena Neves, Samira Costa-Silva, Marzia Antonelli, Janaina Rocha Lorenço, Cristiane K. M. Kolesnikovas, José Luiz Catão-Dias   +9 more
doaj   +1 more source

Aspergillosis in free-ranging Magellanic penguins

Medical Mycology, 2023
Abstract We evaluated the mortality due to aspergillosis in free-ranging Magellanic penguins during their migration and the reproductive season. A total of 98 carcasses of penguins were collected along 370 km of coastline in Southern Brazil, between June 2017 and October 2019, and from reproductive colonies in Patagonian Argentina, in ...
Aryse Martins Melo, Vanice Rodrigues Poester, Mariana Rodrigues Trápaga, David A Stevens, Paula Lima Canabarro, Andréa Corrado Adornes, Andrine Paiva da Silva, Sérgio Curi Estima, Esteban Frere, Raquel Sabino, Melissa Orzechowski Xavier   +10 more
openaire   +2 more sources

Genetic Evidence of Active Circulation and Evolution of Diverse Penguin Siadenoviruses in Antarctica Based on Partial DNA Sequences. [PDF]

Transbound Emerg Dis
Antarctica, one of the most isolated and extreme regions on Earth, hosts diverse bird species that share breeding and feeding habitats, facilitating interspecies transmission of pathogens. In this study, we investigated penguin siadenoviruses using cloacal swab samples collected from Antarctic penguins between 2017 and 2023 to explore their genetic ...
Lee SY, Kim S, Kim JH, Kim JU, Kim JH, Kim J, Oh Y, Song JW.   +7 more
europepmc   +2 more sources

Partial migration in Magellanic penguins

Journal of Avian Biology, 2023
We studied the migration of Magellanic penguins near the southern tip of the breeding distribution, and for the first time found evidence of partial migration for this species within the same colony. Forty‐three percent of the penguins studied stayed within ~ 290 km of the colony (residents), while others went northwards as far as ...
Melina Barrionuevo, Esteban Frere
openaire   +2 more sources

Female-biased stranding in Magellanic penguins [PDF]

Current Biology, 2019
Magellanic penguins (Spheniscus magellanicus) have been reported to become stranded along the coasts of northern Argentina, Uruguay and southern Brazil during the austral winter [1-3]. This location is more than a thousand kilometers distant from their northernmost breeding colony in northern Patagonia.
Yamamoto, Takashi, Yoda, Ken, Blanco, Gabriela Silvina, Quintana, Flavio Roberto   +3 more
openaire   +3 more sources

The role of demographic history and selection in shaping genetic diversity of the Galápagos penguin (Spheniscus mendiculus).

PLoS ONE, 2020
Although many studies have documented the effects of demographic bottlenecks on the genetic diversity of natural populations, there is conflicting evidence of the roles that genetic drift and selection may play in driving changes in genetic variation at ...
Gabriella Arauco-Shapiro, Katelyn I Schumacher, Dee Boersma, Juan L Bouzat   +3 more
doaj   +1 more source

Sexual and geographic dimorphism in northern rockhopper penguins breeding in the South Atlantic Ocean [PDF]

, 2020
The Endangered northern rockhopper penguin Eudyptes moseleyi, like all penguins, is monomorphic, making sex determination of individuals in the field challenging.
Bond, AL, Booth, JM, McQuaid, CD, Steinfurth, A, White, J   +4 more
core   +1 more source

Avian Pox in Magellanic Penguins (Spheniscus magellanicus) [PDF]

Journal of Wildlife Diseases, 2012
Avian pox is an enveloped double-stranded DNA virus that is mechanically transmitted via arthropod vectors or mucosal membrane contact with infectious particles or birds. Magellanic Penguins (Spheniscus magellanicus) from two colonies (Punta Tombo and Cabo Dos Bahías) in Argentina showed sporadic, nonepidemic signs of avian pox during five and two of ...
Kane, Olivia J., Uhart, Marcela María, Rago, María Virginia, Pereda, Ariel Julián, Smith, Jeffrey R., Van Buren, Amy, Clark, Alan J., Boersma, P. Dee   +7 more
openaire   +3 more sources

Contrasting patterns of selection between MHC I and II across populations of Humboldt and Magellanic penguins [PDF]

, 2016
Indexación: Web of ScienceThe evolutionary and adaptive potential of populations or species facing an emerging infectious disease depends on their genetic diversity in genes, such as the major histocompatibility complex (MHC). In birds, MHC class I deals
Dantas, GPM, Frere, E, Gonzalez-Acuna, D, Luna-Jorquera, G, Padilla, P, Sallaberry-Pincheira, N, Valdes-Velasquez, A, Vianna, JA   +7 more
core   +1 more source