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First record of the bathypelagic chaetognath Heterokrohnia involucrum Dawson, 1968 in the Gulf of California and its association with a parasitic nematode

Por: González Solís, David. Doctor [autor/a].
Gasca, Rebeca [autor/a].
Tipo de material: Artículo ArtículoTema(s): Heterokrohnia involucrum | Quetognatos | Parásitos | HysterothylaciumTema(s) en inglés: Heterokrohnia involucrum | Chaetognatha | Parasites | HysterothylaciumDescriptor(es) geográficos: Golfo de California (México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Thalassas: An International Journal of Marine Sciences. volumen 34, número 1 (April 2018), páginas 227-232. --ISSN: 0212-5919Número de sistema: 58960Resumen:
Inglés

During a plankton survey of shallow and deep waters in the Gulf of California carried out with the aid of an unmanned submersible by the Monterey Bay Aquarium Research Institute (MBARI), a specimen of the deep-living epibenthic chaetognath Heterokrohnia involucrum Dawson, 1968 was collected at a depth of 2670 m in the Alarcon Mount region. This species was originally described from the Arctic Ocean and it is now recorded for the first time in Mexican waters, thus representing a new geographical record and expanding its geographical range. The chaetognath was parasitized in the coelom with a larval stage of the nematode Hysterothylacium sp. that is probably assignable to H. aduncum (Rudolphi, 1802) and frequently found in zooplankton organisms, which act as intermediate hosts. There are no previous records of nematodes parasitizing deep-living chaetognaths, so this finding also represents a new host record.
Lista(s) en las que aparece este ítem: Producción Rebeca Gasca
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Disponible para usuarios de ECOSUR con su clave de acceso

During a plankton survey of shallow and deep waters in the Gulf of California carried out with the aid of an unmanned submersible by the Monterey Bay Aquarium Research Institute (MBARI), a specimen of the deep-living epibenthic chaetognath Heterokrohnia involucrum Dawson, 1968 was collected at a depth of 2670 m in the Alarcon Mount region. This species was originally described from the Arctic Ocean and it is now recorded for the first time in Mexican waters, thus representing a new geographical record and expanding its geographical range. The chaetognath was parasitized in the coelom with a larval stage of the nematode Hysterothylacium sp. that is probably assignable to H. aduncum (Rudolphi, 1802) and frequently found in zooplankton organisms, which act as intermediate hosts. There are no previous records of nematodes parasitizing deep-living chaetognaths, so this finding also represents a new host record. eng

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