Coordinate migration ensuring sexual parasitism in fish species: Extreme weather conditions induce atypically large fish dispersal movements

Coordinate migration ensuring sexual parasitism in fish species

Autores/as

  • Filipe Miguel Santos Banha MARE – Centro de CIências do Mar e do Ambiente / ARNET - Aquatic Research network
  • Pedro Brandão MARE – Marine and Environmental Sciences Centre, ARNET – Aquatic Research https://orcid.org/0009-0008-9911-0272
  • Marta Soares MARE – Marine and Environmental Sciences Centre, ARNET – Aquatic Research Network, Departamento de Paisagem, Ambiente e Ordenamento, Universidade de Évora, Évora, Portugal 2 CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, InBIO Laboratório Associado, Porto, Portugal 3BIOPOLIS Program in Genomics, Biodiversity and Land Planning, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus de Vairão, Vairão, Portugal https://orcid.org/0000-0002-5213-2377
  • Pedro Anastácio MARE – Marine and Environmental Sciences Centre, ARNET – Aquatic Research https://orcid.org/0000-0003-1808-3847

Resumen

This study reports, for the first time, a previously undocumented large and coordinated upstream migration of Squalius pyrenaicus (Günther, 1868) and Squalius alburnoides (Steindachner, 1866) in the Vascão River (Mediterranean temporary river) (Portugal), covering distances of at least 1687 metres and up to 4540 metres. These species were considered resident, but this migration happened after a dry year followed by an extremely wet winter and spring. These findings suggest that these species possess stronger dispersal capacities than previously thought, and could coordinate migrations to ensure interspecific relationships, specifically the sperm parasitism of S. pyrenaicus by S. alburnoides.

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Publicado

2026-06-09

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Sección

Research Paper