Dwarf vipers on a small island: body size, diet and fecundity correlates
2022
Аутори:
Tomović, LjiljanaAnđelković, Marko
Golubović, Ana
Arsovski, Dragan
Ajtić, Rastko
Sterijovski, Bogoljub
Nikolić, Sonja
Crnobrnja-Isailović, Jelka
Lakušić, Margareta
Bonnet, Xavier
Тип документа:
Чланак у часопису (Објављена верзија)
,
© The Author(s) 2022. Published by Oxford University Press on behalf of The Linnean Society of London.
Метаподаци
Приказ свих података о документуАпстракт:
Insular populations offer excellent opportunities to study the factors that influence phenotypes. We observed island dwarfism in a widespread snake, the nose-horned viper (Vipera ammodytes). Island vipers were ~20% smaller than mainland individuals. They also produced fewer and smaller offspring. In snakes, food availability has a positive influence on body size, fecundity and offspring size. Consequently, low energy intake is a plausible explanation for insular dwarfism. The diet of island vipers was principally represented by lizards and centipedes, whereas the most profitable prey items (e.g. rodents) were regularly found in the stomach of mainland vipers. Furthermore, the proportion of individuals captured with a full stomach and good body condition were lower on the island compared with the mainland. Thus, island vipers were likely to be experiencing permanent energy restriction, with cascading effects on adult body size and reproductive output. Large prey promotes high relative jaw length in snakes. Island
vipers displayed smaller relative jaw length compared with mainland populations, suggesting that plasticity played a role in insular dwarfism. But the difference in relative tail length between island and mainland populations, a trait not subjected to food-induced plasticity, indicates local adaptation. Both plasticity and adaptation might influence the phenotype of island vipers.
Кључне речи:
body size; diet; island dwarfism; mainland; relative jaw length; relative tail length; reproductive outputИзвор:
Biological Journal of the Linnean Society, 2022, 137, 2, 267-279Финансирање / пројекти:
- FCT(ref. 2020.04790.BD)
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