Re‐assessing the applicability of the Jarman/Bell model and Kay's threshold to the insectivorous aye‐aye ( Daubentonia madagascariensis )
| Autor: | Brigitte M. Raharivololona, Harison Razafimahaleo, Doménico Roger Randimbiharinirina, Olivier Randrianarison, Timothy M. Sefczek, Edward E. Louis |
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| Rok vydání: | 2019 |
| Předmět: |
Male
0106 biological sciences Continuous sampling Zoology Body size 010603 evolutionary biology 01 natural sciences Madagascar Animals Body Size Juvenile 0601 history and archaeology 060101 anthropology biology Adult female Aye-aye Significant difference Insectivore Feeding Behavior 06 humanities and the arts biology.organism_classification Diet Strepsirhini Behavioral data Anthropology Female Anatomy |
| Zdroj: | American Journal of Physical Anthropology. 171:336-341 |
| ISSN: | 1096-8644 0002-9483 |
| Popis: | Objectives Jarman/Bell principle and Kay's threshold suggest that large animals should not be able to sustain themselves on insects. However, animals with specialized morphological and/or behavioral adaptations violate these assumptions. Male aye-ayes were recently identified as having an insectivorous diet despite weighing 2.5 kg. We further explored this diet/body size disparity by studying behaviors of an adult female and juvenile male aye-aye. Materials and methods We collected behavioral data on an adult female and juvenile male aye-aye in Torotorofotsy, Madagascar from January 2016 to December 2017. We used instantaneous sampling to determine the frequency of feeding events and continuous sampling during feeding behaviors to assess duration of feeding bouts. Results Invertebrates comprised over 88% of the diet for both animals. A Wilcoxon signed-rank test found no significant difference in the female's feeding frequencies between the hot/rainy seasons and the cold/dry seasons. Discussion Our results support earlier findings that invertebrates are the aye-aye's main resource and corroborate that aye-ayes violate assumptions of the Jarman/Bell model and Kay's threshold. We suggest that the Jarman/Bell principle and Kay's threshold be used as supporting evidence and not to repudiate findings that do not conform to these guidelines. |
| Databáze: | OpenAIRE |
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