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Nasopharyngeal mites Halarachne halichoeri (Allman, 1847) parasitizing the gray seal Halichoerus grypus (Fabricius, 1791) in the Baltic Sea with notes on other parasitic Halarachnidae associated with marine mammals

Rolbiecki L., Izdebska J. N., Bidziński K., Jankowska-Jarek M.

Oceanological and Hydrobiological Studies

2018

Vol. 47, No. 4

398--404

Parasitic arthropods of marine mammals are relatively poorly understood, with the least amount of data on the occurrence of parasitic arthropods in these hosts. Thus far, only seal lice Echinophthirius horridus (von Olfers, 1816) have been found in the Baltic seals, while there was no information about the presence of parasitic mites in these mammals. The nasopharyngeal mite Halarachne halichoeri (Allman, 1847) has recently been found in the gray seal Halichoerus grypus (Fabricius, 1791), representing a new species (and new genus) for the Polish fauna. Sixty three specimens were found in the nasal cavity and the trachea, including 18 females and 45 males. This is also the first documented record of Halarachnidae in seals of the Baltic Sea. A checklist of parasitic Halarachnidae known from marine mammals is also provided.

New data on the parasites of the Eurasian otter (Lutra lutra)

Rolbiecki L., Izdebska J. N.

Oceanological and Hydrobiological Studies

2014

Vol. 43, No. 1

1--6

The Eurasian otter Lutra lutra (Linnaeus, 1758) is a typical representative of carnivorous mammals from the family of mustelids (Mustelidae) which are closely connected with aquatic ecosystems. Parasitofauna of the otter is poorly identified, e.g. only two specimens have been examined in Poland for the presence of parasites. Currently, three species of parasites were found in one otter: the nematode Oswaldocruzia filiformis (Goeze, 1782), the acanthocephalan Acanthocephalus ranae (Schrank, 1788) and the skin mite from the Demodecidae family. Demodex sp. is a new species to science, while O. filiformis and Demodex sp. are new parasites for the otter throughout the species range. Furthermore, A. ranae was found for the first time in the otter from the area of Poland. The recorded helminths are typical parasites of amphibians and reptiles, and their occurrence in the Eurasian otter may result from postcyclic transmission from primary hosts.