Wyniki wyszukiwania - BazTech

1

Parasitization of monkey goby, Neogobius fluviatilis (Pallas, 1814) (Actinopterygii: Gobiidae), at localities with different salinity levels

Kvach Y., Ondračková M., Trichkova T., Drobiniak O., Zamorov V., Jurajda P.

Oceanological and Hydrobiological Studies

|

2018

|

Vol. 47, No. 4

376--383

EN

Parasitism of monkey goby, Neogobius fliviatilis, was assessed at three brackish water localities with different salinity levels (Gulf of Odessa, Khadzibey Estuary, Lake Kytay) and one freshwater site along the Lower Danube River (Vidin). A total of 25 parasite taxa were identified, with minimum parasite richness recorded in the Khadzhibey Estuary (three species) and the maximum along the Lower Danube (11 species). Parasite richness in the mesohaline Gulf of Odessa and oligohaline Lake Kytay was lower, but still relatively high compared to the Khadzibey Estuary. Our study indicates that freshwater populations of monkey goby host richer and more abundant parasite communities than those inhabiting brackish waters with (more or less) stable salinity. Unstable abiotic conditions that probably affected the parasite’s intermediate hosts contributed to the reduction in parasite species in the estuarine zone of the Danube.

2

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

Kvach Y.

Oceanological and Hydrobiological Studies

|

2004

|

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.

3

The round goby's parasites in native habitats and in a place of invasion

Kvach Y.

Oceanological Studies

|

2002

|

Vol. 31, No. 1-2

51-57

EN

Parasites of the round goby in the North-Western Black Sea region and the Gulf of Gdask have been investigated. Only Acanthocephalus lucii that infect the round goby from the Black Sea were found in one specimen from the Baltic Sea. A lot of the round goby's parasites are fresh water species (Diplostomum spp., A. lucii, Ergasilus sieboldi). The round goby's parasites which are most widespread in the Black Sea (Cryptocotyle spp., Dichelyne minutus) do not infect the goby in the Baltic Sea but are present for other fishes (Gobius niger, Platichthyes flesus). It is possible that the Baltic population of the round goby have a fresh water origin, because independently of the fact that marine parasites, Cryptocotyle concavum and D. minutus, inhabit the Gulf they do not infect the round goby.

4

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

Kvach Y.

Oceanological Studies

|

2002

|

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.

5

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

Kvach Y.

Oceanological Studies

|

2001

|

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.

6

Feeding preferences of the round goby Neogobius melanostomus and mushroom goby Neogobius cephalarges in the Odessa Bay

Kvach Y., Zamorov V.

Oceanological Studies

|

2001

|

Vol. 30, No. 3-4

91-101

EN

Feeding preferences of the round goby and mushroom goby from the Odessa Bay (areas with civil engineering works) were studied. Two goby species were observed to choose different dietary items in dependence of the season and place of fishery. The mushroom goby chose Nereis succinea more intensively than the round goby.