4.5 Article

First use of acoustic calls to distinguish cryptic members of a fish species complex

期刊

ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
卷 195, 期 3, 页码 964-975

出版社

OXFORD UNIV PRESS
DOI: 10.1093/zoolinnean/zlab056

关键词

bioacoustics; biodiversity; biogeography; communication; Pomacentridae; sibling species

类别

资金

  1. Agence de l'eau-Rhone Mediterranee Corse [2018 1765]
  2. Fondation de France [2019-08602]
  3. Ministere de l'Economie verte et du domaine-Delegation a la recherche de Polynesie francaise [N3622 MED- EPHE]
  4. Fonds de la Recherche Scientifique-FNRS [T.0192.20-PDR]
  5. [ANR-19-CE34-0006-Manini]
  6. [ANR-19-CE14-0010-SENSO]

向作者/读者索取更多资源

This study used bioacoustical analysis to investigate cryptic species within the humbug damselfish complex. By recording chase and courtship sounds, it was found that courtship sounds were more consistent and could potentially help discriminate cryptic species in Teleosts. Acoustic features and genetic data variations were observed between different populations, supporting the differentiation of distinct populations within the complex.
Although molecular methods and bioacoustical analysis have been used to uncover cryptic species, the combination of both methodologies is still rare. The humbug damselfish complex, Dascyllus aruanus, is composed of at least two species with Dascyllus aruanus in the Pacific Ocean and Dascyllus abudafur in the Indian Ocean. However, genetic data suggest that additional species could be found. Therefore, we aimed to determine whether the sounds produced by different populations of fish could help to distinguish cryptic species. Recordings of chase and courtship sounds were made on humbug damselfish populations from Madagascar, Taiwan and French Polynesia. Chase sound features are more variable than courtship sounds, suggesting more constraints on courtship sounds, since they would contribute to premating isolation. Comparison between courtship sounds show the variation in acoustic features between Taiwan and Madagascar align with genetic differences, supporting that sounds could discriminate cryptic species in Teleosts. Moreover, differences in both acoustic features and genetic data are also found between Taiwan and French Polynesia, suggesting two clearly distinct populations. Consequently, the name D. emamo can be resurrected for the Polynesian humbug damselfish. External phenotype traits do not allow the distinction between populations, illustrating that only behaviour has been modified.

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