Aerobic power and flight capacity in birds: a phylogenetic test of the heart-size hypothesis

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Nespolo, Roberto F.University of Austral Chile, Chile; University of Catolica Chile, Chile (author)

Aerobic power and flight capacity in birds: a phylogenetic test of the heart-size hypothesis

Article/chapterEnglish2018

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2017-01-01
COMPANY OF BIOLOGISTS LTD,2018
electronicrdacarrier

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LIBRIS-ID:oai:DiVA.org:liu-144563
https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-144563URI
https://doi.org/10.1242/jeb.162693DOI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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Funding Agencies|Fondo Nacional de Desarrollo Cientifico y Tecnologico [1130750, 11160271]; Linkopings Universitet; Svenska Forskningsradet Formas; Direccion General de Investigacion Cientifica y Tecnica [CGL2012-36345]; Comision Nacional de Investigacion Cientifica y Tecnologica
Flight capacity is one of the most important innovations in animal evolution; it only evolved in insects, birds, mammals and the extinct pterodactyls. Given that powered flight represents a demanding aerobic activity, an efficient cardiovascular system is essential for the continuous delivery of oxygen to the pectoral muscles during flight. It is well known that the limiting step in the circulation is stroke volume (the volume of blood pumped from the ventricle to the body during each beat), which is determined by the size of the ventricle. Thus, the fresh mass of the heart represents a simple and repeatable anatomical measure of the aerobic power of an animal. Although several authors have compared heart masses across bird species, a phylogenetic comparative analysis is still lacking. By compiling heart sizes for 915 species and applying several statistical procedures controlling for body size and/or testing for adaptive trends in the dataset (e.g. model selection approaches, phylogenetic generalized linear models), we found that (residuals of) heart size is consistently associated with four categories of flight capacity. In general, our results indicate that species exhibiting continuous hovering flight (i.e. hummingbirds) have substantially larger hearts than other groups, species that use flapping flight and gliding show intermediate values, and that species categorized as poor flyers show the smallest values. Our study reveals that on a broad scale, routine flight modes seem to have shaped the energetic requirements of birds sufficiently to be anatomically detected at the comparative level.

Subject headings and genre

NATURVETENSKAP Biologi Zoologi hsv//swe
NATURAL SCIENCES Biological Sciences Zoology hsv//eng
Comparative phylogenetics; Cardiovascular system; Stroke volume; Aves; Ornstein-Uhlenbeck models

Added entries (persons, corporate bodies, meetings, titles ...)

Gonzalez-Lagos, CesarUniversity of Catolica Chile, Chile; University of Bernardo OHiggins, Chile (author)
Solano-Iguaran, Jaiber J.University of Austral Chile, Chile (author)
Elfwing, MagnusLinköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska fakulteten(Swepub:liu)magel65 (author)
Garitano-Zavala, AlvaroUniversity of Mayor San Andres, Bolivia (author)
Manosa, SantiagoUniversity of Barcelona, Spain (author)
Carlos Alonso, JuanCSIC, Spain (author)
Altimiras, JordiLinköpings universitet,Biologi,Tekniska fakulteten(Swepub:liu)joral85 (author)
University of Austral Chile, Chile; University of Catolica Chile, ChileUniversity of Catolica Chile, Chile; University of Bernardo OHiggins, Chile (creator_code:org_t)

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In:Journal of Experimental Biology: COMPANY OF BIOLOGISTS LTD221:10022-09491477-9145

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NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Zoology

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By the university: Linköping University

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