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Javier Pérez-Tris

@jpereztris.bsky.social

167 followers 85 following 4 posts

Professor of Zoology. Evolutionary ecology of birds and other critters. t.co/oXXToweXMr

Posts Replies Media

Reposted by Javier Pérez-Tris

Michi Tobler @toblermichi.bsky.social · 23/03/2026

Nice to see our review out in @avianbiology.bsky.social! Flight is costly - but so are infections. We argue that infections may be a substantial, yet mostly overlooked, source for oxidative stress in migrating birds. doi.org/10.1002/jav.... #Migration #Birds #OxidativeStress #Ornithology 🪶 🧵1/5

First page of the review in Journal of Avian Biology entitled: Oxidative costs of migration: infections as an added burden by Michi Tobler and co-authors. Inlcudes journal banner and doi-link

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Javier Pérez-Tris @jpereztris.bsky.social · 09/05/2025

Aves migratorias: cómo sobreviven en un mundo antrópico sciencemediacentre.es/aves-migrato...

sciencemediacentre.es

Aves migratorias: cómo sobreviven en un mundo antrópico

Las aves migratorias sufren de manera especial las variaciones climáticas, ecológicas y urbanísticas derivadas del mundo en constante cambio en el que vivimos. Su supervivencia está en riesgo, así como los ecosistemas entre los que desarrollan sus vidas. Analizamos qué amenazas encaran de manera cíclica en sus rutas migratorias y por qué es importante protegerlas.

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Javier Pérez-Tris @jpereztris.bsky.social · 27/01/2025

See our last research on Iberian blackcaps and their blood parasites. Proud of this team! 💪💪

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Reposted by Javier Pérez-Tris

Carolina Remacha @cremacha.bsky.social · 27/01/2025

NEW PAPER doi.org/10.1098/rspb... ! In nature time is precious. We discovered that young of a small passerine bird, the Eurasian blackcaps, infected by haemosporidians, commonly known as avian malaria parasites, were delayed in the moult that confers these birds an adult plumage.

The image shows at the top left, the map with the 26 localities spanning the wide range of environmental conditions across Iberian Spain. At the bottom left, a photo of a juvenile Eurasian blackcap together with a rectangle showing the codes that indicate the progress of the post-juvenile moult (from 1 to 6) and the summary of the main results (lower moult scores indicative of delayed moult in birds with Plasmodium, Haemoproteus and high-Haemoproteus parasite load). At the top right there is the Figure 2 of the paper with the mean posterior probability and 95% Bayesian credible intervals (BCI) of each stage of PJM (represented with different colours) in juvenile blackcaps that were either uninfected, single-infected or co-infected by any haemosporidian lineage. And finally, at the bottom right there is the figure 3 of the paper with the relationship between the Haemoproteus intensity and the posterior probability of each post-juvenile moult score.

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Reposted by Javier Pérez-Tris

Journal of Avian Biology @avianbiology.bsky.social · 07/05/2024

NEW PAPER: Young male blackcaps with blood parasite coinfections cope with oxidative stress favouring anthocyanin-rich food during migratory fattening full article ➡️ nsojournals.onlinelibrary.wiley.com/doi/10.1111/... @jpereztris.bsky.social #ornithology #migration #oxidative #stress

Fig. 1 from the article: Variation in preference for fat-enriched food (as opposed to preference for anthocyanin-enriched food) between blackcaps with different levels of multiple status of infection by haemosporidian parasites (sample sizes in each group are indicated).

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Javier Pérez-Tris @jpereztris.bsky.social · 18/10/2023

Asomando la nariz por aquí... Hola 😊

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