Geographical Isolation Drives Developmental Modularity Shifts in the Skull of a Critically Endangered Carnivore, the Arctic Fox (Vulpes lagopus)

Martín-Serra, A.; Нанова, О.Г.; Ortega, G.; Varón-González, C.; Figueirido, B.

Авторы: Martín-Serra A., Нанова О.Г., Ortega G., Varón-González C., Figueirido B.
Журнал: Journal of Morphology
Том: 280
Номер: S1
Год издания: 2019
Издательство: John Wiley & Sons Inc.
Местоположение издательства: United States
Первая страница: S174
Последняя страница: S174
DOI: 10.1002/jmor.21003
Аннотация: Island populations are excellent systems to investigate the effects ofgenetic isolation on phenotypic variation, evolvability, and ecologicaladaptations. However, how genetic isolation influences intraspecificintegration and modularity change are less explored. Here, we usethe skull of the isolated Arctic foxes (Vulpes lagopus) of the Beringand Mednyi islands to explore how variation in phenotypic integrationand modularity in isolated populations impact ecological adaptationsto feed on specific resources. A set of three-dimensionallandmarks in a wide sample of fox skulls from the mainland and fromBering and Mednyi islands were digitized. We performed a PCA toexplore morphological variation of the three populations, and weanalyzed morphological integration of each population at two levels:static (among adult individuals) and developmental (using fluctuatingasymmetry). The results of the PCA show that the skulls of foxesfrom Mednyi have the shortest rostra, which increases the mechanicaladvantage for biting larger prey, whereas the skulls of mainlandfoxes have the longest rostra. In addition, the skulls of the foxesfrom Mednyi Island are more integrated than the ones of the mainlandfor both static and developmental levels. The degree of integrationof the skull of the foxes from Bering Island is intermediate. Ourresults indicate that: (i) genetic isolation of Arctic foxes is accompaniedby an increase in phenotypic integration within the skull, includingthe developmental level; and (ii) this stronger developmentalintegration has favored adaptive morphological changes for huntinglarger prey in foxes from Mednyi Island. This indicates that changesin developmental integration not only can influence phenotypic macroevolution,but also microevolution.
Добавил в систему: Нанова Ольга Геннадьевна

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Geographical Isolation Drives Developmental Modularity Shifts in the Skull of a Critically Endangered Carnivore, the Arctic Fox (Vulpes lagopus)статья Тезисы

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