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Duration of memory of dominance relationships in a group living cichlid

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2014

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Hotta, Takashi
Takeyama, Tomohiro
Kohda, Masanori

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The Science of Nature = Naturwissenschaften. 2014, 101(9), pp. 745-751. ISSN 0028-1042. eISSN 1432-1904. Available under: doi: 10.1007/s00114-014-1213-z

Zusammenfassung

Animal contests are costly and tend to escalate when rivals have similar competitive abilities. Individuals that remember dominance relationships with rivals may avoid repeated agonistic interactions and hence avoid the costs of repeated escalation of contests. However, it can be difficult to experimentally disentangle the effects of memory from those of loser effects (losers behaving subordinately due to prior defeats). Here, we test whether loser effects or individual memory mediate contest behaviour in the African cichlid, Julidochromis transcriptus. We find that on days 3 and 5 after initial contests, losers display subordinate behaviour to contest winners but not to novel contestants. However, this effect disappears after 7 days, at which time losers do not display subordinate behaviour to either rival. These results show that (1) this fish can recall a previously dominant contestant for up to 5 days and (2) as no subordinate displays were shown to the novel contestant, there are no evidences for loser effects in this species. Such short-term memory of past interactions may have broad significance in social species with repeated interactions.

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570 Biowissenschaften, Biologie

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ISO 690HOTTA, Takashi, Tomohiro TAKEYAMA, Alex JORDAN, Masanori KOHDA, 2014. Duration of memory of dominance relationships in a group living cichlid. In: The Science of Nature = Naturwissenschaften. 2014, 101(9), pp. 745-751. ISSN 0028-1042. eISSN 1432-1904. Available under: doi: 10.1007/s00114-014-1213-z
BibTex
@article{Hotta2014-09Durat-38870,
  year={2014},
  doi={10.1007/s00114-014-1213-z},
  title={Duration of memory of dominance relationships in a group living cichlid},
  number={9},
  volume={101},
  issn={0028-1042},
  journal={The Science of Nature = Naturwissenschaften},
  pages={745--751},
  author={Hotta, Takashi and Takeyama, Tomohiro and Jordan, Alex and Kohda, Masanori}
}
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