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Parasitological survey of smelt, Osmerus eperlanus (Actinopterygii: Osmeridae), from five estuary sites along the southern coast of the Baltic Sea

Pilecka-Rapacz M., Piasecki W., Głoćko M., Kesminas V., Domagała J., Wiśniewski G., Czerniawski R.

Oceanological and Hydrobiological Studies

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2017

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Vol. 46, No. 3

314--324

EN

This is the first comprehensive study covering the parasite fauna of smelt, Osmerus eperlanus, from five estuary sites of the southern Baltic Sea in a stretch of almost 500 km. We examined 432 smelt from: the Neman River mouth, the Vistula River mouth, Pomeranian Bay, the Oder River, and Lake Dąbie and recovered 13 species/higher-rank taxa of parasites: Diplostomum spp., Posthodiplostomum cuticola, Eubothrium crassum, Proteocephalus longicolis, Cystidicola farionis, Hysterothylacium aduncum, Corynosoma semerme, Pomphorhynchus laevis, Unionidae gen sp., Ergasilus sieboldi, Argulus foliaceus, Piscicola geometra, and Saprolegniaceae gen sp. Basic infection parameters such as prevalence, intensity of infection, mean intensity of infection, and the dominance index were determined. The findings of the presently reported study constitute a number of new faunistic records. There were two new host records (Posthodiplostomum cuticola and Saprolegniaceae gen sp.), five new host records for Poland (Diplostomum spp., Pomphorhynchus laevis, Piscicola geometra, Argulus foliaceus, and Unionidae gen sp.), and two new host records for Lithuania (Argulus foliaceus and Unionidae gen sp.). We carefully analyzed the relevant information from more than 100 publications on smelt parasites to compare the data with our own findings.

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Species richness and the diversity of parasite communities of eelpout Zoarces viviparus (Linnaeus, 1758) in the Oder River estuary, Poland

Sobecka E., Łuczak E.

Oceanological and Hydrobiological Studies

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2015

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Vol. 44, No. 4

520--529

EN

A parasitological study was carried out on 330 eelpouts from two fishing grounds of the Polish fishing zone off the Oder estuary (Pomeranian Bay and Dziwna Mouth). A total of 11 species and genera of parasites from six higher taxa were recorded: 1 monogenean, 1 digenean, 5 nematodes (eelpout was a new host for Ascarophis morhuae and Capillaria gracilis), 2 acanthocephalans, 1 mollusk and 1 protist (a fungus-related pathogen). A total of 4284 autogenic countable parasites were identified. These included parasites of eight species and two genera (six higher taxa) from Pomeranian Bay, and five species (two higher taxa) from the Dziwna Mouth. The abundance of parasites per host was higher in fish from the Dziwna Mouth, while the parasitic biodiversity index was almost two times lower than in Pomeranian Bay. Pomphorhynchus laevis dominated among the eelpout parasites in both fishing grounds, but the parasite communities from the Dziwna Mouth consisted of a larger number of dominating classes. The high intensity of infection of Hysterothylacium auctum and the relative density affect more the dimensions of the dominant parasite (P. laevis) in the Dziwna Mouth than the crowding of parasites. Infection by more abundant large parasites have an important influence on the value of Fulton’s coefficient.

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Occurrence and distribution of parasites in relation to food components of grey gurnard, Eutrigla gurnardus (L.) (Teleostei: Scorpaeniformes), off the Shetland Islands

Sobecka E., Więcaszek B., Łuczak E., Antoszek A.

Oceanological and Hydrobiological Studies

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2014

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Vol. 43, No. 3

257--264

EN

The research was conducted on the parasite fauna and food composition of Eutrigla gurnardus caught as by-catch in commercial catches of the Atlantic cod Gadus morhua near the Shetland Islands. Thirteen species and two genera of pathogens were identified, including six species and one genus recorded for the first time in this host. Copepoda - Euphausiacea dominated in the stomach contents (they are also the intermediate hosts for most of the parasites found), while Gadidae dominated among the fish. A checklist of E. gurnardus parasites is included.

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New and "visiting" fish species collected off the western coast of Poland (Baltic Sea) in 2007-2008 with a description of their parasite fauna

Więcaszek B., Sobecka E., Dudko S., Keszka S.

Oceanologia

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2011

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No. 53 (1)

163-179

EN

The first occurrence of striped red mullet Mullus surmuletus in the Pomeranian Bay (in 2007) and the occurrence of three very rarely noted species (tub gurnard Chelidonichthys lucerna, Atlantic horse mackerel Trachurus trachurus, thicklip grey mullet Chelon labrosus) collected in 2007-2008 in the Pomeranian Bay, Szczecin Lagoon and Lake Dąbie are reported. Their expansion is probably due to increased sea temperatures resulting from climate change, as well as the inflow of saline water. The "visitors" hosted eight pathogens from four taxonomic groups: Protozoa, Nematoda, Acanthocephala and Mollusca. Nematodes, the most numerous ones, were found in three host species. All the parasite species were new for the hosts examined; only the larvae of the acanthocephalan Corynosoma strumosum had already been recorded in one of the hosts (Chelidonichthys lucerna). The stomachs of almost all the fish examined were empty, but the species composition of the parasite fauna found showed that the fish must have ingested some food in the Pomeranian Bay.

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Badania nad parazytofauną słonecznicy Leucaspius delineatus (Heckel, 1843) w wybranych antropogenicznych zbiornikach wodnych Górnośląskiego Okręgu Przemysłowego

Kwiatkowski S., Pokora Z.

Archiwum Ochrony Środowiska

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2003

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Vol. 29, no. 3

61--70

PL

W wybranych zapadliskach górniczych i wyrobiskach popiaskowych, sytuowanych w mezoregionie Górnośląskiego Okręgu Przemysłowego, odłowiono 346 słonecznic, w klasach wiekowych I-5, o przeciętnej długości i masie ciała odpowiednio 4,5 cm oraz 1,34 g. U badanych ryb stwierdzono występowanie: dojrzałych tasiemców Caryophyllaeides fennica, plerocerkoidów Ligula iutestinalis oraz Schristocephalus .solids,. metacerkrii przywry Posthodiplostomum cuticola oraz dwóch skorupiaków Leruea cyprinacea i Argulas foliaceus. W przypadku zarażenia plerocerkoidami obu tasiemców, wyraźnie wyższą ekstensywność inwazji obserwowano w wyrobiskach popiaskowych, natomiast najwyższą ekstensywność zarażenia skorupiakiem Argulus foliaceus - w badanych zapadliskach. Zjawisko to autorzy dyskutują w kontekście różnic w zakresie temperatury wody oraz warunków tlenowych w obu typach :analizowanych zbiorników.

EN

In selected mining sinkhole ponds and Band-pits in the Upper-Silesian Industrial Region there were collected 346 sunbleak, in the age classes 1-5, with mean length and body weight 4.5 cm and 1.34 g, respectively. In the infected fish there were found: adult cestodes Caryophyllaeides fennica, plerocercoids of Ligula intestinalis and Schistocephalus solidus, metacercariae of the trematode Posthodiplostomum cuticola, as well as two crustaceans Lernea cyprinacea and Argulus foliaceus. In the case of the infection with plerocercoids of both cestodes distincly greater prevalence of the infection was observed in Band-pits, whereas maximal prevalence of the infection with the crustacean Argulus foliaceus - in examined sinkhole ponds. Authors discuss this phenomenon in the context of differences in temperature and oxygen conditions in both types of analyzed reservoirs.