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Philichthys xiphiae (Copepoda; Philichthyidae) : an interesting cranium parasite of the swordfish Xiphias gladius collected from the Baltic Sea

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Rolbiecki L. , Arciszewski B. , Izdebska J. N.

Oceanological and Hydrobiological Studies

2021

tom Vol. 50, No. 3

333--337

The swordfish, Xiphias gladius Linnaeus, 1758, is a fish that sporadically enters the Baltic Sea. The present paper describes the identification of a very rarely recorded and poorly studied copepod of the family Philichthyidae – Philichthys xiphiae Steenstrup, 1862 – in a dead swordfish found on a sea beach in Dźwirzyno (Poland) in 2016. Philichthyidae are parasites inhabiting the sensory canals in the lateral line and skull bones of marine fish. In the present case, two P. xiphiae females were found, which constitutes the first record of the species in the Baltic area.

Demodex phocidi (Acariformes: Demodecidae) from Phoca vitulina (Carnivora: Phocidae) : the second observation in the world and a supplement to the species description

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Izdebska J. N. , Rolbiecki L. , Cierocka K. , Pawliczka I.

Oceanological and Hydrobiological Studies

2020

tom Vol. 49, No. 1

49--55

The present study describes a finding of the demodecid mite Demodex phocidi in the seal Phoca vitulina in the Baltic Sea. This is the first identification in Europe and the second in the world. This is also the first observation of the Demodecidae family in the pinnipeds outside North America. A high density of demodecid mites was observed in the skin of the examined seal, but no symptoms of parasitosis were observed. Our findings also supplement the taxonomic description and morphometry of D. phocidi.