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  Bi-parental mucus provisioning in the scale-eating cichlid Perissodus microlepis (Cichlidae)

Satoh, S., Awata, S., Jordan, L. A., Kakuda, U., Hori, M., & Kohda, M. (2019). Bi-parental mucus provisioning in the scale-eating cichlid Perissodus microlepis (Cichlidae). Biological Journal of the Linnean Society, 128(4), 926-935. doi:10.1093/biolinnean/blz124.

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Satoh, S., Author
Awata, S., Author
Jordan, Lyndon Alexander1, Author              
Kakuda, U., Author
Hori, M., Author
Kohda, M., Author
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1Department of Collective Behavior, Max Planck Institute of Animal Behavior, Max Planck Society, ou_3054976              

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 Abstract: Although parental care is known to occur in a wide range of teleost fishes, postnatal provisioning of nutrition has been documented rarely. Here, we describe a novel example of bi-parental care in a teleost, i.e. mucus-provisioning behaviour in the scale-eating cichlid Perissodus microlepis endemic to Lake Tanganyika. Field observations revealed that young guarded by their parents frequently glanced towards the body surface of both parents. Furthermore, analyses of stomach contents of the young found the presence of ingested mucus, confirming that the young feed on the mucus secretions of their parents. The frequency of glancing behaviour increased with size of the young up to similar to 13 mm in standard length, but then declined with further growth. Additionally, the frequency of glancing of young towards their parents was higher when the frequency of foraging on plankton was lower. Underwater cage experiments revealed a higher rate of growth in the young kept in direct contact with their parents than in those not allowed direct contact. We conclude that glancing behaviour in young P. microlepis is a form of direct parental nourishment that confers growth benefits to the young when food abundance is low.

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 Dates: 2019
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: Other: WOS:000503442600012
DOI: 10.1093/biolinnean/blz124
ISSN: 0024-4066
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Title: Biological Journal of the Linnean Society
  Abbreviation : Biol. J. Linn. Soc. Lond.
Source Genre: Journal
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Publ. Info: London : Wiley
Pages: - Volume / Issue: 128 (4) Sequence Number: - Start / End Page: 926 - 935 Identifier: ISSN: 0024-4066
CoNE: https://pure.mpg.de/cone/journals/resource/954922646052