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Blog post in Oikos blog about the phylosophy behind the Oikos paper "Colony size and foraging range in seabirds" Selected by R Jovani
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Swift Incredible Journey Selected by R Jovani
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Dinosaurs 'shrank' regularly to become birds BBC (Science paper) Selected by JL Alcantara
Parrot Who Was Among Last of Its Kind, Said to Have Inspired ‘Rio,’ Dies National Geographic Society Selected by JL Alcantara
Researchers declassify dinosaurs as being the great-great-grandparents of birds Phys.org (Journal of Ornithology paper) Selected by JL Alcantara
Pristine fossil confirms Archaeopteryx as original bird United Press International (Nature paper) Selected by JL Alcantara
All gone: How erasing billions of birds shocked us Yahoo! News (PNAS paper) Selected by JL Alcantara
Plants hitch a lift on migrating birds BBC Nature (PeerJ paper) Selected by JL Alcantara
Mapping the evolution of a ring species Univ. British Columbbia (Nature paper) Selected by R Jovani
Closest Living Relative of Ancient Elephant Bird Is Tiny LiveScience (Science paper) Selected by JL Alcantara
Identifying evolutionary distinct birds WIRED (Current Biology paper) Selected by R Jovani
Ten Thousand Birds: Ornithology since Darwin Myriad Birds Selected by JL Alcantara
The 100 most distinct and rare birds BBC Nature (Current Biology paper) Selected by JL Alcantara
Hummingbird Evolution Soared After They Invaded South America 22 Million Years Ago ScienceNewsline (Current Biology paper) Selected by JL Alcantara
Bird’s Extinction Is Tied to the Arrival of Humans The New York Times (PNAS paper) Selected by JL Alcantara
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Colonizing songbirds lost sense of syntax e! Science News (Current Biology paper) Selected by JL Alcantara
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Collision Course ScienceNews (ScienceNews paper) Selected by JL Alcantara
Social learning of migratory performance PhysOrg (Science paper) Selected by R Jovani
Evolution of parasitic egg colouration: parasites also select. Not Exactly Rocket Science blog(Biol Lett paper) Selected by R Jovani
European birds adjust their flight initiation distance to road speed limits BBC News(Biol Lett paper) Selected by R Jovani
The secret of male beauty (in turkeys) UCL News (PLOS Genetics paper) Selected by JL Alcantara
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Why penguins lost their wings ABC Science (PNAS paper) Selected by JL Alcantara
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Lead bullet fragments poison rare US condors BBC News Selected by JL Alcantara
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Pretty great tits make better mothers Discover (Frontiers in Zoology paper) Selected by JL Alcantara
Humans wiped out Pacific island birds ABC Science (PNAS paper) Selected by JL Alcantara
The Rise and Fall of Four-Winged Birds Not Exactly Rocket Science (Science paper) Selected by R Jovani
Sex role reversal: Female shorebirds rule the roost BBC News (Nature Communications paper) Selected by JL Alcantara
Birds communicate their size through song ScienceDaily(PLoS ONE paper) Selected by R Jovani
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The Owl Comes Into Its Own The New York Times-Science Selected by JL Alcantara
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A great tit predating upon a common redpoll (video; Finnish) Ilta Sanomat Selected by R Jovani
Killing Barred Owls To Save the Spotted Owl CNN Selected by JL Alcantara
New dinosaur fossil challenges bird evolution theory e! Science News (Nature paper) Selected by JL Alcantara
Fractal geometry of a plumage pattern changes with physical condition in partridges ScienceNow(Proc R Soc B paper) Selected by I Galván
As Andean condors decline, tradition draws critics Reuters Selected by JL Alcantara





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Tuesday 9 December 2008

Micro-migdiades

Els ocells que migren durant la nit perden moltes hores de son. En els mamífers, la pèrdua de son se sap que té conseqüències negatives, però els ocells semblen portar molt bé el fer llargues jornades de vol nocturn. Com s’ho fan?

S’ha vist que durant el dia els ocells poden tancar un ull o l’altre (o els dos). En aquest estudi, Fuch i col·laboradors van estudiar l’activitat cerebral durant aquestes “micro-migdiades”. Van veure que durant els segons que els ocells tancaven l’ull l’hemisferi cerebral corresponent tenia una activitat típica del son. Els autors argumenten que aquestes micro-migdiades podrien tindre un paper important en la migració nocturna de moltes espècies d’ocells. Aquest comportament permetria un compromís entre els beneficis reparadors del son i la necessitat de mantenir-se alerta en front dels depredadors.


> Fuchs, et al. (2009) Daytime micro-naps in a nocturnal migrant: an EEG analysis. Biology Letters 5(1): 77-80.
Photo by Mike (Flickr; Creative Commons).


----------------------------- ESPAÑOL ----------------------------------

Micro-siestas

Las aves que migran durante la noche pierden muchas horas de sueño. En los mamíferos, la pérdida de sueño, se sabe que tiene consecuencias negativas, pero las aves parecen llevar muy bien el hacer largas jornadas de vuelo nocturno. ¿Cómo lo consiguen?
Se ha visto que, durante el día, las aves pueden cerrar un ojo o el otro (o los dos). En este estudio, Fuch y colaboradores estudiaron la actividad cerebral durante estas "micro-siestas". Vieron que durante los segundos que las aves cerraban el ojo, el hemisferio cerebral correspondiente tenía la actividad típica del sueño. Los autores argumentan que estas micro-siestas podrían desempeñar un papel importante en la migración nocturna de muchas especies de aves. Este comportamiento, permitiría un compromiso entre los beneficios reparadores del sueño y la necesidad de mantenerse alerta ante los depredadores.

> Fuchs, et al. (2009) Daytime micro-naps in a nocturnal migrant: an EEG analysis. Biology Letters 5(1): 77-80.
Foto de Mike (Flickr; Creative Commons).

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