Affiliation:
1. Department of Biosciences, University of Exeter, Penryn, Cornwall, United Kingdom
Abstract
Begging for food, a conspicuous solicitation display, is common in a variety of taxa, and it has received extensive research attention in a parent-offspring context. Both theoretical models and empirical evidence suggest that offspring begging can be an honest signal of hunger or a mediator of competition between siblings. At a behavioural mechanistic level, begging for food can be a form of harassment aimed at persuading those in possession of food to share. Food sharing, defined as the transfer of a defendable food item from one individual to another, can vary considerably between species, age-classes and food type and abundance. We investigated the determinants of begging and food-sharing behaviours in Asian small-clawed otters (Aonyx cinereus), a group-living species that commonly exhibits begging in captivity. We presented two captive otter populations with three food types that varied in exploitation complexity, in three different abundances. We predicted that begging rates would be highest when food was in lowest abundance and hardest to exploit, and that increased begging would lead to increased food sharing. We found that, over time, increased begging rates were indeed correlated with increased food transfers, but neither food type complexity nor abundance affected begging or sharing rates. However, age category was significantly associated with begging and food sharing rates: juvenile otters begged more and shared less than adult otters. The results from this first experimental study on begging and food sharing within the Mustelid family begin to reveal some of the drivers of these behaviours.
Subject
General Agricultural and Biological Sciences,General Biochemistry, Genetics and Molecular Biology,General Medicine,General Neuroscience
Reference115 articles.
1. Changes in the diet of a recovering Eurasian otter population between the 1970s and 2010;Almeida;Aquatic Conservation: Marine and Freshwater Ecosystems,2012
2. Notes on population status and feeding behaviour of Asian small-clawed Otter (Aonyx cinereus) in the Sundarbans Mangrove Forest of Bangladesh;Aziz;IUCN Otter Spec. Group Bull,2018
3. lme4: linear mixed-effects models using Eigen and S4 (Version 1.0-6);Bates,2014
4. Tolerated theft, suggestions about the ecology and evolution of sharing, hoarding and scrounging;Blurton Jones;Information,1987
5. Hunting behavior of wild chimpanzees in the Tai National Park;Boesch;American Journal of Physical Anthropology,1989
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