scholarly journals Experimental evidence for helping and hindering by previous offspring in the cooperative-breeding Seychelles warbler Acrocephalus sechellensis

1994 ◽  
Vol 34 (3) ◽  
pp. 175-186 ◽  
Author(s):  
Jan Komdeur
Keyword(s):  
Experimental Evidence ◽  
Cooperative Breeding ◽  
Seychelles Warbler

scholarly journals Explicit experimental evidence for the role of mate guarding in minimizing loss of paternity in the Seychelles warbler

1999 ◽  
Vol 266 (1433) ◽  
pp. 2075-2081 ◽  
Author(s):  
Jan. Komdeur ◽  
Femmie. Kraaijeveld-Smit ◽  
Ken. Kraaijeveld ◽  
Pim. Edelaar
Keyword(s):  
Experimental Evidence ◽  
Mate Guarding ◽  
Seychelles Warbler

scholarly journals On the psychology of cooperation in humans and other primates: combining the natural history and experimental evidence of prosociality

2010 ◽  
Vol 365 (1553) ◽  
pp. 2723-2735 ◽  
Author(s):  
Adrian V. Jaeggi ◽  
Judith M. Burkart ◽  
Carel P. Van Schaik
Keyword(s):  
Natural History ◽  
Experimental Evidence ◽  
Human Evolution ◽  
Social Distance ◽  
Related Species ◽  
Cooperative Breeding ◽  
Food Sharing ◽  
History Of

In any given species, cooperation involves prosocial acts that usually return a fitness benefit to the actor. These acts are produced by a set of psychological rules, which will be similar in related species if they have a similar natural history of cooperation. Prosocial acts can be (i) reactive , i.e. in response to specific stimuli, or (ii) proactive , i.e. occur in the absence of such stimuli. We propose that reactive prosocial acts reflect sensitivity to (i) signals or signs of need and (ii) the presence and size of an audience, as modified by (iii) social distance to the partner or partners. We examine the evidence for these elements in humans and other animals, especially non-human primates, based on the natural history of cooperation, quantified in the context of food sharing, and various experimental paradigms. The comparison suggests that humans share with their closest living relatives reactive responses to signals of need, but differ in sensitivity to signs of need and cues of being watched, as well as in the presence of proactive prosociality. We discuss ultimate explanations for these derived features, in particular the adoption of cooperative breeding as well as concern for reputation and costly signalling during human evolution.

scholarly journals Experimental vacancies do not induce settlement despite habitat saturation in a cooperative breeder

2020 ◽  
Vol 16 (3) ◽  
pp. 20190757
Author(s):  
Lyanne Brouwer ◽  
Andrew Cockburn
Keyword(s):  
Experimental Evidence ◽  
Cooperative Breeding ◽  
Ecological Constraints ◽  
Multiple Group ◽  
Risk Of Predation ◽  
Group Members ◽  
Habitat Saturation ◽  
Crucial Test

The paradox of cooperative breeding, whereby individuals assist others instead of reproducing independently, is generally explained through ecological constraints, but experimental evidence is scant. Here we performed the crucial test of the role of habitat saturation through the experimental creation of vacancies and found that, despite abundant presence of potential mates, subordinates are reluctant to disperse into suitable vacant habitat where conspecifics are absent. We argue that sudden disappearance of multiple group members might indicate a heightened risk of predation. Thereby the results of this study are consistent with the ‘perceptual trap’ hypothesis: the avoidance of habitats because cues do not accurately reflect their quality. Interestingly, this hypothesis can also explain previous findings, which were widely interpreted as evidence for ecological constraints as a driver of cooperative breeding. Our results can have considerable implications for conservation as they mean that opportunities for colonization might go unexploited.

scholarly journals Experimental evidence for innate predator recognition in the Seychelles warbler

2000 ◽  
Vol 267 (1459) ◽  
pp. 2253-2258 ◽  
Author(s):  
Thor Veen ◽  
David S. Richardson ◽  
Karen Blaakmeer ◽  
Jan Komdeur
Keyword(s):  
Experimental Evidence ◽  
Predator Recognition ◽  
Seychelles Warbler ◽  
Innate Predator Recognition
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