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1

The metazoa parasites of gobiids in the Dniester Estuary (Black Sea) depending on water salinity

Kvach Y.

Oceanological and Hydrobiological Studies

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2004

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Vol. 33, No. 3

47--56

EN

A list is presented of metazoan parasites that infect seven gobiid fishes (the toad goby Mesogobius batrachocephalus, monkey goby Neogobius fluviatilis, racer goby N. gymnotrachelus, bighead goby N. kessleri, round goby N. melanostomus, ratan goby N. ratan, and syrman goby N. syrman) from the Dniester Estuary (Black Sea). Infections by thirteen species of metazoa parasites, including four trematodes, three cestodes, five nematodes, and one crustacean species, were observed in the gobies sampled from the estuary. The data complements the existing list of parasite species that inhabit the fishes of this aquatic basin. Water salinity varies in the estuary, which impacts parasite distribution. Brackish-water parasites prevailed in the Dniester Estuary, while the marine trematode C. lingua occurred only in the southern part.

2

Helminths parasitising gobies and other fishes in the Budaksky Lagoon (Black Sea, Ukraine)

Kvach Y.

Oceanological Studies

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2002

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Vol. 31, No. 1-2

59-65

EN

The aim of the present work was to investigate the helminth fauna of commercially caught gobiid fishes (Zosterisessor ophiocephalus, Neogobius melanostomus, N. fluviatilis, N. syrman) of the Budaksky Lagoon. The studied fish harbored nine parasite species that include three Holarctic species, one Euro-Siberian, one Cosmopolitan species, one Boreo-Atlantic species, one Mediterranean species, and two Ponto-Caspian ones. The most widespread species were: Cryptocotyle lingua, C. convacum, Acanthocephaloides propinquus. Two Ponto-Caspian cestod species: Proteocephalus gobiorum, Ligula pavlovskii are specific for gobiids. Possible reasons of the infection variability were discussed. Eight species of helminths have been recorded for the first time in the Lagoon.

3

Helminthes of gobies from the Tuzly's Lagoons (the north-western part of the Black Sea)

Kvach Y.

Oceanological Studies

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2001

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Vol. 30, No. 3-4

103-113

EN

The round goby Neogobius melanostomus and the grass goby Zosterisessor ophiocephalus are most widespread fishes of the Tuzly?s group salty lagoons - Alibey and Burnas (North-Western part of the Black sea, Ukraine). The helminthofauna of these fishes consists of six species of parasites: Cryptocotyle lingua, C. concavum, Acanthocephaloides propinquus, Telosentis exiguus, Contracaecum microcephalum, and Cucullanellus minutus. Trematods of the genus Cryptocotyle, acanthocephalans A. propinquus, and larvae of nematods C. microcephalum are reported from this water area for the first time; the latter from gobies for the first time. The interrelation between infection of fishes and biology of helminthes and their host is discussed. This is the first study containing the complete information on the parasite fauna of the Lagoons.

4

Variability of helminth assemblages and populations in the bank vole Clethrionomys glareolus

Haukisalmi V., Henttonen H.

Polish Journal of Ecology

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2000

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Vol. 48, Suppl.

219-231

EN

The present knowledge of the helminth fauna and ecology of helminths in the bank vole Clethrionomys glareolus is reviewed, with special emphasis on the geographical variability of helminth assemblages. The helminth fauna of bank vole is highly predictable throughout its distribution range, with the possible exception of England and Wales. In the latter region, helminth species diversity was lower and species dominance relationships were different, compared with those on the continental regions. The patterns of seasonal and long-term population dynamics of helminths are reviewed, showing that life-cycles do not determine the patterns of seasonal variability of helminth populations. Although some helminth species show patchy spatial distribution in the field, (high) aggregation of helminth species among host population is shown to pe due to differences between host individuals in exposure and/or susceptibility, rather than spatial heterogeneity on a higher scale. Two unpublished experiments show that the ubiquitous helminth species of bank voles, Heligmosomum mixtum (Nematoda), has the potential to act as a mortality factor if the quality of the host diet is poor, but bank vole populations are unlikely to be regulated by this nematode.