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Cranial features of mainland and Commander Islands Arctic foxes Vulpes lagopus reflect their diverging foraging strategiesстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 января 2018 г.
- Авторы: Нанова О.Г., Проа М.
- Журнал: Polar Research
- Том: 36
- Номер: S1
- Год издания: 2017
- Издательство: Norsk Polarinstitutt/Norwegian Polar Institut
- Местоположение издательства: Norway
- Первая страница: 68
- Последняя страница: 72
- DOI: 10.1080/17518369.2017.1310976
- Аннотация: Populations of Arctic fox (Vulpes lagopus) in the Commander Islands, in the RussianBering Sea, have been isolated since the Pleistocene and differ substantially in theircranial features from their mainland counterpart. Small rodents, the main prey of mainlandArctic foxes, are not found in the Commander Islands, where the main food sourcefor Arctic foxes are large sea birds and marine mammals. Here we assessed whetherdifferences in foraging strategy, particularly the size of available prey, could explain theobserved differences in cranial features between mainland and island Arctic foxes.Because a large gape is necessary when foraging on large prey, we compared gapeangles between islands and mainland in a sample of dry crania. We found an enlargedgape angle in both island populations. We also compared the rostrum to cranium lengthratio and found it to be similar for the mainland and Bering Island Arctic foxes; however,a rostrum contraction was found in the Mednyi Island Arctic foxes. We show that cranialdifferences between mainland and Commander Islands fox populations could beexplained by their different foraging ecology. Furthermore, the relative rostrum contractionin the Mednyi Island foxes provides further evidence for cranial resistance todeformation during biting. These results show the importance that distinct foragingstrategies can have in Arctic fox divergent evolution, and, consequently, on futureconservation plans for the two Commander Islands subspecies.
- Добавил в систему: Нанова Ольга Геннадьевна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Cranial_features_of_mainland_and_Commander_Islands_Russia_A… | 1,1 МБ | 16 августа 2017 [nanova] |