Didymozoid trematode parasitizing Pleurobrachia bachei (Ctenophora) and Muggiaea atlantica (Siphonophora) in the Gulf of California

Didymozoid in gelatinous zooplankton

Autores

  • Horacio Lozano Cobo Departamento de Hidrobiología, Universidad Autónoma Metropolitana, Unidad Iztapalapa, Departamento de Plancton y Ecología Marina, Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional
  • Jaime Gómez Gutiérrez Departamento de Plancton y Ecología Marina, Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional
  • Carlos J. Robinson Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México

Palavras-chave:

Didymozoidae, metacercariae, Ctenophora, Siphonophora, Pacific Ocean

Resumo

Background. Few studies exist of parasites of zooplanktonic organisms. This situation increases the odds to discover new species of parasites, new types of parasitic interactions, and reports that increase the geographic distribution ranges worldwide. Goals. We report a new parasitic interaction between the metacercariae of didymozoids (Digenea) with a ctenophore and a siphonophore species (gelatinous zooplankton) based on observations of live zooplankton in the Gulf of California. Methods. Zooplankton was collected during day and night using a standard Bongo net in an oceanographic cruise carried out during June-July 2016 in the Gulf of California. Results. We observed four ctenophore specimens of Pleurobrachia bachei (intensity of parasitism = 2-3 parasites per host) and a siphonophore specimen of Muggiaea atlantica (intensity = 1) parasitized with a total of nine metacercariae Didymozoidae morphologically identified as larval type Monilicaecum. Molecular analysis of didymozoid metacercariae was not attempted here, but a molecular identification of morphologically similar didymozoids was previously reported infecting chaetognaths of the Gulf of California. Didymozoids were found in three different microhabitats in the P. bachei and in the subumbrellar cavity of M. atlantica. Conclusions. We do the first record of didymozoid parasitizing ctenophores and siphonophores that also represent new geographic records for these parasites in the Gulf of California extending its distribution range from the Atlantic Ocean to the Pacific Ocean.

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Biografia do Autor

Jaime Gómez Gutiérrez, Departamento de Plancton y Ecología Marina, Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional

Profesor-Investigador Titular . Doctor en Ciencias Marinas. SNI III.

Línea de Investigación:

1) Biología Ecológica y Ecofisiología de Crustáceos

2) Efecto del Cambio Climático en Ecosistemas Marinos

 

Carlos J. Robinson, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México

Investigador Titular T.C.

PHD, University of Wales, UK.

Línea de Investigación: Estudio de la variación del Ecosistema Pelágico del Golfo de California por medio del uso de sensores remotos satelitales e hidroacústica relacionado con el calentamiento global y el cambio climático local y su efecto en las comunidades locales.

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Publicado

2025-09-18

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Lozano Cobo, H., Gómez Gutiérrez, J., & Robinson, C. J. (2025). Didymozoid trematode parasitizing Pleurobrachia bachei (Ctenophora) and Muggiaea atlantica (Siphonophora) in the Gulf of California: Didymozoid in gelatinous zooplankton. HIDROBIOLÓGICA, 35(2). Recuperado de https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/1803

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