ABSTRACT
Trematodes of the genus Aphalloides Dollfus, Chabaud & Golvan, 1957 reach maturity in their second intermediate host, small fishes of the family Gobionellidae, genera Pomatoschistus and Knipowitschia. Two morphologically similar species have been described from European waters: Aphalloides coelomicola Dollfus et al., 1957 in the Mediterranean Sea (including the brackish Black Sea region) and Aphalloides timmi Reimer, 1970 in the Baltic Sea. There was no difference in morphology and morphometry for specimens corresponding to A. coelomicola and A. timmi and examination of the 28S rDNA sequence confirmed the similarity. Based on these results, these two species are synonymized and A. coelomicola redescribed.
Subject(s)
Trematoda/classification , Animals , Black Sea , Fish Diseases/parasitology , Mediterranean Sea , Perciformes/parasitology , Saline WatersABSTRACT
The round goby Neogobius melanostomus is a bottom-dwelling fish native for the Ponto-Caspian basin, which started to colonize the Baltic Sea since 1991. The parasites of this fish species in the southwestern Baltic region are studied for the first time. The round goby in the SW Baltic Sea was infected with 12 parasite species: 1 species of Microsporidia, 1 species of Monogenea, 1 of Cestoda, 3 species of Trematoda, 3 species of Nematoda, 2 of Acanthocephala, and 1 species of Bivalvia. Microsporidia genus species have the great tendency to join the infracommunity in all localities, except the Stettiner Haff, where this tendency have Diplostomum spathaceum met and Unio sp. glochidia. The round goby was colonized by seven new parasites species not found in this fish in the Baltic Sea earlier: Microsporidia gen. sp., Gyrodactylus rugiensis, Bucephalus polymorphus, Cosmocephalus obvelatus L3, Eustrongylides excisus L3, Paracuaria adunca L3, Unio sp. glochidia. Microsporidia gen. sp., G. rugiensis, and Unio sp. are new parasites for the round goby. In general, the processes of colonization have the same tendency as in the Gulf of Gdansk.
