Publikation:

Subordinate Fish Mediate Aggressiveness Using Recent Contest Information

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2021

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Hotta, Takashi
Awata, Satoshi
Kohda, Masanori

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Frontiers in Ecology and Evolution. Frontiers. 2021, 9, 685907. eISSN 2296-701X. Verfügbar unter: doi: 10.3389/fevo.2021.685907

Zusammenfassung

Memorizing dominance relationships can help animals avoid unwinnable subsequent contests. However, when competitive ability changes over time—for example, as a function of condition—it may be adaptive to “forget” these dominance relationships and for subordinates to once again enter contests with previously dominant individuals. Here, we examined the behavior of pairs of male cichlid fish, Julidochromis transcriptus, in repeated contests separated by different time intervals. We found that the time taken to reach resolution of dominance relationships influenced subsequent aggressive behavior of the subordinate toward the dominant, with longer initial contests leading to higher subsequent aggression. Longer time intervals between contests also increased aggression from the subordinate toward the dominant. These results are consistent with increasing uncertainty due to ambiguous contest outcomes and increasing time intervals. Our results also show that a longer time was necessary to resolve contests between larger pairs, suggesting a self-assessment strategy, but not a mutual assessment strategy. Taken together, larger individuals appear to adaptively lose or ignore previously gathered social information because they have a higher fighting ability and better body condition. Therefore, we conclude that losing or ignoring unreliable information may be an adaptive strategy in the context of dominance relationships.

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Fachgebiet (DDC)
570 Biowissenschaften, Biologie

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adaptive forgetting theory, cichlid, contest duration, Julidochromis transcriptus, memory, selfassessment

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ISO 690HOTTA, Takashi, Satoshi AWATA, Alex JORDAN, Masanori KOHDA, 2021. Subordinate Fish Mediate Aggressiveness Using Recent Contest Information. In: Frontiers in Ecology and Evolution. Frontiers. 2021, 9, 685907. eISSN 2296-701X. Verfügbar unter: doi: 10.3389/fevo.2021.685907
BibTex
@article{Hotta2021-09-13Subor-57103,
  year={2021},
  doi={10.3389/fevo.2021.685907},
  title={Subordinate Fish Mediate Aggressiveness Using Recent Contest Information},
  volume={9},
  journal={Frontiers in Ecology and Evolution},
  author={Hotta, Takashi and Awata, Satoshi and Jordan, Alex and Kohda, Masanori},
  note={Article Number: 685907}
}
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