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Metabolic costs of hybridization in newts

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    0383936 - ÚBO 2013 RIV CZ eng J - Journal Article
    Gvoždík, Lumír
    Metabolic costs of hybridization in newts.
    Folia zoologica. Roč. 61, 3-4 (2012), s. 197-201. ISSN 0139-7893. E-ISSN 1573-1189
    R&D Projects: GA ČR GAP506/10/2170; GA MŠk LC06073
    Institutional support: RVO:68081766
    Keywords : oxygen consumption * energetic metabolism * hybrids * Triturus * amphibians * mitonuclear interactions * reproductive barriers
    Subject RIV: EG - Zoology
    Impact factor: 0.494, year: 2012

    Heterospecific hybrids often suffer from a lowered fitness relative to parental species. Contextdependent intrinsic costs of hybridization are partially due to a malfunction in cell biochemical machinery that affects metabolic rates at the organismal level. This study examines whether heterospecific hybridization influences the metabolic costs of maintenance in F1 hybrids between closely related newts, Triturus carnifex and T. dobrogicus. When controlled for body size, oxygen consumption in hybrid newts was 59–76 % higher than in the parental species. This suggests that high standard metabolic rates in hybrids may contribute to the costs of hybridization in newts.
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Number of the records: 1