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From mammals back to birds: Host-switch of the acanthocephalan Corynosoma australe from pinnipeds to the Magellanic penguin Spheniscus magellanicus
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SYSNO ASEP 0482906 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název From mammals back to birds: Host-switch of the acanthocephalan Corynosoma australe from pinnipeds to the Magellanic penguin Spheniscus magellanicus Tvůrce(i) Hernandez-Orts, J. S. (AR)
Brandao, M. (BR)
Georgieva, Simona (BC-A) RID
Raga, J. A. (ES)
Crespo, E.A. (AR)
Luque, J.L. (BR)
Aznar, F. J. (ES)Celkový počet autorů 7 Číslo článku e0183809 Zdroj.dok. PLoS ONE. - : Public Library of Science - ISSN 1932-6203
Roč. 12, č. 10 (2017)Poč.str. 23 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova mitochondrial gene-sequences ; parasite community structure ; american sea lion ; phylogenetic-relationships ; arctocephalus-australis ; polymorphidae acanthocephala ; ecological specialization ; evolutionary ecology ; systematic position ; helminth-parasites Vědní obor RIV EH - Ekologie - společenstva Obor OECD Ecology Institucionální podpora BC-A - RVO:60077344 UT WOS 000412360300005 EID SCOPUS 85030687915 DOI 10.1371/journal.pone.0183809 Anotace Trophically-transmitted parasites are regularly exposed to potential new hosts through food web interactions. Successful colonization, or switching, to novel hosts, occur readily when 'donor' and 'target' hosts are phylogenetically related, whereas switching between distantly related hosts is rare and may result from stochastic factors (i.e. rare favourable mutations). This study investigates a host-switching event between a marine acanthocephalan specific to pinnipeds that is apparently able to reproduce in Magellanic penguins Spheniscus magellanicus from Brazil. Detailed analysis of morphological and morphometrical data from acanthocephalans from penguins indicates that they belong to Corynosoma australe Johnston, 1937. Partial fragments of the 28S rRNA and mitochondrial cox1 genes were amplified from isolates from penguins and two pinniped species (i.e. South American sea lion Otaria flavescens and South American fur seal Arctocephalus australis) to confirm this identification. Infection parameters clearly differ between penguins and the two pinniped species, which were significantly lower in S. magellanicus. The sex ratio of C. australe also differed between penguins and pinnipeds, in S. magellanicus was strongly biased against males, while in pinnipeds it was close to 1:1. Females of C. australe from O. flavescens were smaller than those from S. magellanicus and A. australis. However, fecundity (i.e. the proportion of fully developed eggs) was lower and more variable in females collected from S. magellanicus. At first glance, the occurrence of reproductive individuals of C. australe in Magellanic penguins could be interpreted as an adaptive colonization of a novel avian host through favourable mutations. However, it could also be considered, perhaps more likely, as an example of ecological fitting through the use of a plesimorphic (host) resource, since the ancestors of Corynosoma infected aquatic birds. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2018
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