Publication details
MONOGENEAN ECTOPARASITES (GYRODATYLIDEA) FROM THE ANTARCTIC FISHES IN
| Authors | |
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| Year of publication | 2015 |
| Type | Conference abstract |
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| Description | Gyrodactylidea Bychowsky, 1937 (Monogenea) includes species that parasitize predominantly on the gills or the fins of fish. To date, only nine species of the genus Gyrodactylus Nordmann, 1832 (Gyrodactylidae Cobbold, 1864) and five species of the three genera of Tetraonchoididae (Allotetraonchoides Dillon & Hargis, 1968, Neopavlovskioides Dillon & Hargis, 1968 and Pavlovskioides Bychowsky, Gusev & Nagibina, 1965) have been described from fishes living in Antarctic waters. The fish were sampled in Prince Gustav Channel, Weddell Sea during the Antarctic summers of 2013 and 2014. Examined fish belong to genera Notothenia Richardson, 1844 and Trematomus Boulenger, 1902 (both Nototheniidae Günther, 1861) and Parachaenichthys Boulenger, 1902 (Bathydraconidae Regan, 1914). A prevalence of 38% (44/115) was recorded for monogeneans. Species identification based on morphometric analysis of hard parts of attachment organ shown the presence of seven species from genera Gyrodactylus and Pavloskoides. From Notothenia coriceps two Gyrodactylus species were identified, Gyrodactylus coriicepsi and Gyrodactylus sp. 1. From the fish of Trematomus (T. newnesi, T. bernacchi, T. eulepidotus and T. hansoni) four Gyrodactylus species and two Pavlovskoides species were recognized, namely G. australis, Gyrodactylus sp. 1, Gyrodactylus sp. 2, Gyrodactylus sp. 3 and Pavlovskoides sp. 1 and Pavlovskoides sp. 2. No monogeneans were observed from fish of the genus Parachaenichthys. The highest species richness, 4 species of Gyrodactylus and 2 species of Pavlovskoides, was observed on T. bernacchi. The highest prevalence of 54% was observed for G. australis on T. newnesi. This study significantly extends the knowledge about monogeneans in the Antarctic region. |
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