Prolonged Parental Feeding in Tool‐Using New Caledonian Crows

Ethology - Tập 118 Số 5 - Trang 423-430 - 2012
Gavin R. Hunt1, Jennifer C. Holzhaider1, Russell D. Gray1
1Department of Psychology, University of Auckland, Auckland, New Zealand

Tóm tắt

AbstractAccording to life‐history theory, the duration of extended parental feeding is determined by the costs and benefits of maximising reproductive success. Therefore, the length of regular parental provisioning should be correlated with the time required for juveniles to acquire the skills that they need to be independent. The relatively few cases of extremely prolonged parental feeding in both land and sea birds appear to be consistent with this prediction because they are associated with learning‐intensive foraging techniques. New Caledonian crows have the most intricate tool manufacture techniques amongst non‐human animals and juveniles take over 1 yr to reach adult‐like proficiency in their tool skills. We investigated the prediction that this species also should have prolonged parental provisioning. We found that these crows have one of the longest known periods of regular extended parental provisioning in birds. Some parents regularly fed juveniles for up to 10 mo post‐fledging. Humans also stand out amongst primates because of their learning‐intensive foraging strategies and an extended period of juvenile dependence. The independently evolved association between a relatively high level of technological skill in foraging and prolonged juvenile provisioning in both humans and New Caledonian crows raises the possibility that these two characteristics might be causally related.

Từ khóa


Tài liệu tham khảo

dos Anjos L., 2009, Handbook of the Birds of the World, 494

10.2307/4083627

10.1642/0004-8038(2002)119[0790:CBGOCC]2.0.CO;2

10.1016/j.jhevol.2007.08.012

10.1007/978-1-4684-2988-6_10

10.1515/9780691206981

10.1016/j.neulet.2008.01.026

10.1098/rspb.2002.2082

10.1111/j.1474-919X.1972.tb00831.x

10.1016/j.jhevol.2006.05.003

10.1086/285198

10.1111/j.1439-0310.1988.tb00202.x

10.1163/000579510X12629536366284

10.1016/j.anbehav.2010.09.015

10.1038/379249a0

10.1071/MU01056

10.1098/rspb.2002.2302

10.1098/rsbl.2003.0085

10.1007/s10071-003-0200-0

10.1098/rsbl.2006.0603

10.1080/03014220709510058

10.1002/1520-6505(2000)9:4<156::AID-EVAN5>3.0.CO;2-7

10.1038/433121a

10.1093/beheco/11.4.367

10.1159/000295151

Morton J. M., 1999, Reproduction and Juvenile Dispersal of Mariana Crows (Corvus kubaryi) on Rota 1996–1999

10.1093/beheco/arh088

10.1126/science.1192053

10.1111/j.1095-8312.2010.01427.x

Shumaker R. W., 2011, Animal Tool Behaviour: The Use and Manufacture of Tools by Animals, 10.1353/book.98237

Thông tin
Thông tin xuất bản

Ethology

Tập 118 Số 5

423-430

Thông tin tác giả