Non-kin adoption in the common vampire bat

Author:

Razik Imran12ORCID,Brown Bridget K. G.12ORCID,Page Rachel A.2ORCID,Carter Gerald G.12ORCID

Affiliation:

1. Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, 318 W. 12th Ave, Columbus, OH, USA

2. Smithsonian Tropical Research Institute, Balboa, Ancón, Republic of Panamá

Abstract

Individual animals across many different species occasionally ‘adopt’ unrelated, orphaned offspring. Although adoption may be best explained as a by-product of adaptive traits that enhance parental care or promote the development of parental skills, one factor that is possibly important for the likelihood of adoption is the history of cooperative interactions between the mother, adopted offspring and adopter. Using 652 h of behavioural samples collected over four months, we describe patterns of allogrooming and food sharing before and after an instance of non-kin adoption between two adult female common vampire bats ( Desmodus rotundus ) that were captured from distant sites (340 km apart) and introduced to one another in captivity. The first female died from an illness 19 days after giving birth. The second female groomed and regurgitated food to the mother more often than any other group member, then groomed, nursed and regurgitated food to the orphaned, female pup. The substantial increase in alloparental care by this female after the mother's death was not observed among the 20 other adult females that were present in the colony. Our findings corroborate previous reports of non-kin adoption in common vampire bats and are consistent with the hypothesis that non-kin adoption can be motivated, in part, by a history of cooperative interactions.

Funder

Sigma Xi

Animal Behavior Society

Smithsonian Tropical Research Institute

The Ohio State University

Publisher

The Royal Society

Subject

Multidisciplinary

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