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Condition and population structure of the round goby (Neogobius melanostomus Pallas, 1811) in Szczecin Lagoon in 2010–2014

Czerniejewski P., Brysiewicz A.

Journal of Water and Land Development

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2018

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no. 37

49--55

EN

The round goby (Neogobius melanostomus Pallas, 1811) is one of the most invasive fish species in the world, including Poland. 300 fish of this species were collected in the waters of Szczecin lagoon between 2010 and 2014 and examination of the size, sex and age structures of the population and of the condition of the fish was performed. Total length and standard length of all the collected fish amounted to 149.2 mm (±42.21) and 128.1 mm (±38.65), respectively. The age structure of the fish consisted of nine generations, with clear prevalence of the fish aged 3+ and 4+. Mean values of condition factors for the whole fish sample amounted to 0.20 (±0.02). However, no statistically significant differences in particular years were observed (ANOVA, p > 0.05), but the condition of the fish between 2010 and 2011 was slightly higher than between 2013 and 2014. The obtained results indicate that the Szczecin Lagoon environment provides this species with favourable living conditions and it can be stipulated that the quantity of individuals of this fish species will increase.

PL

Babka bycza (Neogobius melanostomus Pallas) jest jednym z najbardziej inwazyjnych gatunków ryb na świecie, w tym również w Polsce. W latach 2010–2014 z wód Zalewu Szczecińskiego pozyskano 300 os. tego gatunku i wykonano badania struktury wielkościowej, płci i wieku populacji oraz kondycji odłowionych ryb. Średnia długość całkowita ciała (TL) oraz długość ciała (SL) wszystkich złowionych ryb wyniosła odpowiednio 149,2 mm (± 42,21) i 128,1 mm (±38,65). Struktura wieku złowionych ryb składała się z 9 roczników, z wyraźną dominacją ryb w wieku 3+ i 4+. Wartości średnie współczynników kondycji dla całej próby ryb wyniosły 0,20 (±0,02), przy czym nie zanotowano różnic istotnych statystycznie w poszczególnych latach (ANOVA, p > 0,05), jakkolwiek kondycja ryb w latach 2010–2011 była nieznacznie lepsza niż w latach 2013–2014. Uzyskane wyniki wskazują, że środowisko Zalewu Szczecińskiego zapewnia osobnikom tego gatunku odpowiednie warunki do życia i można sądzić, iż liczebność osobników tego gatunku będzie się zwiększała.

2

Reproduction of the round goby (Neogobius melanostomus) under controlled conditions

Kuczyński T.

Biuletyn Instytutu Morskiego w Gdańsku

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2018

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Vol. 33, No. 1

33--40

EN

Learning mechanisms determining fish reproduction are particularly beneficial in the case of experimental work on juvenile forms of fish making research independent of the season of the year. This paper describes the reproduction method of the round goby, Neogobius melanostomus, under controlled conditions. This species is not native to the ichthyofauna of the Gulf of Gdańsk and was discovered here for the first time in 1990. In the case of pre-seasonal reproduction of the round goby, the first spawning took place 5 weeks after the beginning of thermal stimulation. On the other hand, artificial reproduction of the fish caught in the spring was possible after only a week of being kept in a temperature of 17-19°C. The spawn incubation period ranged from 17 to 22 days, depending on the temperature. For natural spawning, the period from spawning to hatching was 18-19 days, at a constant temperature of 20°C.

PL

Poznanie mechanizmów warunkujących rozród ryb jest szczególnie korzystne w przypadku prac doświadczalnych na formach juwenilnych ryb, gdyż uniezależnia prowadzenie badań od pory roku. Praca opisuje metodę rozrodu babki byczej N. melanostomus w warunkach kontrolowanych. Gatunek ten nie jest rodzimym składnikiem ichtiofauny Zatoki Gdańskiej i został tu po raz pierwszy stwierdzony w 1990 roku. W przypadku przedsezonowego rozrodu babki byczej pierwszego tarła doszło po 5 tygodniach od rozpoczęcia stymulacji termicznej. Sztuczny rozród ryb odłowionych na wiosnę był natomiast możliwy już po tygodniu przetrzymywania w temperaturze 17-19 °C. Okres inkubacji ikry wynosił od 17 do 22 dni w zależności od temperatury. Dla tarła naturalnego czas od tarła do wylęgu wynosił 18-19 dni przy stałej temperaturze 20 °C.

3

Inwazja babki byczej Neogobius melanostomus (Pallas 1814) w estuarium Odry

Czerniejewski P., Kasowska N.

Chemistry, Environment, Biotechnology

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2017

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Vol. 20

59--62

PL

Naturalnym miejscem występowania babki byczej (Neogobius melanostomus) jest rejon Pontokaspijski: zlewiska morza Azowskiego, Czarnego i Kaspijskiego [1], wykazując w ostatnich dekadach gwałtowną ekspansję w Europie [2]. W estuarium Odry po raz pierwszy babki bycze złowione były na początku XXI wieku w Zatoce Pomorskiej [3]. W polskiej części Zalewu Szczecińskiego w 2009 roku, [4], potwierdzili obecność tych ryb. Natomiast w latach 2013-2014 babki bycze licznie notowano w tych akwenach, a nawet w Odrze na wysokości Szwedt i Widuchowej [5]. Biorąc powyższe pod uwagę, jak również negatywny wpływ babki byczej na środowisko wodne, zasadne jest podjęcie badań monitoringowych dotyczących ważniejszych cech biologicznych i populacyjnych.

EN

Natural place of occurrence round goby (Neogobius melanostomus) is Caspian area: catchment Sea of Azov, Black Sea and Caspian Sea [1], where in the last decades was a rapid expansion in Europe [2]. In the estuary of the Oder River in the Pomeranian Bay for the first time round goby was caught in the early twenty-first century [3]. In the Polish part of the Szczecin Lagoon in 2009 [4] confirmed the presence of these fish. Whereas in 2013-2014 round goby was many times recorded in these areas, and even in the Odra River at the height of Szwedt and Widuchowa [5]. Considering the above, as well as the negative impact round goby on the aquatic environment, it is reasonable to undertake monitoring study about important biological characteristics and population.

4

First report on intersex in invasive round goby Neogobius melanostomus from the Baltic Sea (Gulf of Gdańsk, Poland)

Guellard T., Sokołowska E., Arciszewski B.

Oceanologia

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2015

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No. 57 (1)

102--106

EN

This study is the first to report the presence of intersex in invasive round goby Neogobius melanostomus inhabiting the Baltic Sea. The discovery was made in the area of two harbours of the Gulf of Gdańsk (Poland). Macro- and microscopic male gonad analysis revealed the presence of female gametes in testes (testis-ova) of single specimens. In addition, a female-like urogenital papilla was observed in one of the intersex fish. These findings might be due to the exposure to estrogenic endocrine disrupting compounds (EDCs) however the occurrence of single intersex individuals as a baseline level in investigated population is also possible. In the future, more comprehensive research in the other areas of the Gulf of Gdańsk needs to be carried out in order to determine the extent and to better understand the cause of the observed phenomenon.

5

Inwazja babki byczej neogobius melanostomus (pallas, 1814) – ekozagrożenie czy wzbogacenie środowiska?

Stepanowska K, Biernaczyk M, Wrzecionkowski K, Neja Z

Inżynieria Ekologiczna

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2013

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Nr 35

69--74

PL

Babka bycza Neogobius melanostomus (Pallas, 1814) jest rybą naturalnie bytującą w basenie pontokaspijskim. Jednak od drugiej połowy lat 80-tych ubiegłego wieku obserwuje się rozprzestrzenianie tego gatunku w wodach Europy, w tym również w wodach polskich. W ostatnim dwudziestoleciu, począwszy od 1990 roku kiedy to po raz pierwszy złowiono babkę byczą w okolicach portu rybackiego w Helu trwa masowe i szybkie rozprzestrzenianie się tej ryby po całej Zatoce Gdańskiej, Zalewie Wiślanym, wzdłuż południowego wybrzeża Bałtyku, a także w Zatoce Pomorskiej oraz estuarium Odry. W 2009 roku odnotowano pierwsze okazy babki byczej w połowach gospodarczych prowadzonych w jeziorze Dąbie. Obserwując inwazję babki byczej w polskiej strefie przybrzeżnej Bałtyku oraz estuarium Odry należy postawić pytanie czy zjawisko to może być dla człowieka ekozagrożeniem czy wręcz wzbogaceniem jego środowiska?

EN

Round goby Neogobius melanostomus (Pallas, 1814) is a fish species of Ponto-Caspian basin origin. However, since the second part of the 80’s of the last century has observed spreading of this species in European waters, including in Polish waters. In the last two decades, from 1990 when it was first caught of round goby near the fishing port in Hel, takes a massive and rapid spread of this fish throughout the Gulf of Gdańsk, Vistula Lagoon, along the southern Baltic coastal zone and the Pomeranian Bay and also the River Odra estuary. In 2009, first round goby in commercial catches conducted in Lake Dąbie was recorded. In this situation the question is that invasion can be a eco-threat or even enrichment of the environment to the human being?

6

The fecundity and gonad development cycle of the round goby (Neogobius melanostomus Pallas 1811) from the Gulf of Gdańsk

Tomczak M.T., Sapota M.R.

Oceanological and Hydrobiological Studies

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2006

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Vol. 35, No.4

353-367

EN

The round goby (Neogobius melanostomus Pallas 1811) is a non-native species in the Gulf of Gdańsk. The aim of this article is to assess the absolute fecundity and attempt to describe the gonad development cycle of round goby specimens from the Gulf of Gdańsk. The stages of gonad development were classified according to the modified Nikolski (1963) scale for perciformes, which was adapted for the round goby. The sex ratio (female to male) in the population was 3:5. Spawning was most intense during April and July, and there was a pause in June. Fish body size determined fecundity.

7

Parasites of the round goby, Neogobius melanostomus (Pallas, 1811), an invasive species in the Polish fauna of the Vistula Lagoon ecosystem

Rolbiecki L.

Oceanologia

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2006

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No. 48 (4)

545-561

EN

The round goby, Neogobius melanostomus (Pallas, 1811) was introduced into southern Baltic waters (including the Vistula Lagoon) from the Black Sea and Sea of Azov in the early 1990s. This study describes the parasites of the round goby in its new environment. In 2004, 486 round goby specimens from the Vistula Lagoon were examined for parasites. The following taxa were identified: Dermocystidium sp.; Protozoa: Trichodina domerguei domerguei (Wallengren, 1897); Digenea: Cryptocotyle concavum (Creplin, 1825), Diplostomum spp., Tylodelphys clavata (Nordmann, 1831), Bunodera luciopercae (Müller, 1776); Cestoda: Bothriocephalus scorpii (Müller, 1776), Eubothrium crassum (Bloch, 1779), Paradilepis scolecina (Rudolphi, 1819), Proteocephalus filicollis (Rudolphi, 1802), P. gobiorum Dogel et Bychovsky, 1939, Proteocephalus sp.; Nematoda: Anguillicola crassus Kuwahara, Niimi et Itagaki, 1974, Camallanus truncatus (Rudolphi, 1814), Contracaecum spp., Cystidicoloides ephemeridarum (Linstow, 1872), Dichelyne minutus (Rudolphi, 1819), Hysterothylacium aduncum (Rudolphi, 1802); Acanthocephala: Echinorhynchus gadi Müller, 1776, Pomphorhynchus laevis (Müller, 1776). The parasites found were all local species, already reported from Poland. Except for Dermocystidium sp., C. concavum, P. gobiorum, and D. minutes, they have already been recorded in other fish species in the Vistula Lagoon. The prevalence and mean intensity of infection was low (18.3%; 4.0 indiv. - this value does not include ciliates). The most frequent parasites included H. aduncum (9.9%, 1.2 indiv.) and A. crassus (9.1%, 1.2 indiv.). In addition, Dermocystidium sp., B. luciopercae, E. crassum, P. scolecina, P. filicollis, C. truncatus and C. ephemeridarum are reported from the round goby for the first time. As the fish has only recently appeared in the Vistula Lagoon, its parasitic fauna has not yet developed to the full.

8

The spatial organization of the peripheral olfactory organ in the round goby (Neogobius melanostomus)

Belanger R. M., Corkum L. D., Zielinski B.

Oceanological Studies

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2002

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Vol. 31, No. 1-2

23-29

EN

Round goby (Neogobius melanostomus) spawning behaviour and parental care by males may be mediated by pheromones. We examined the spatial organization of the peripheral olfactory organ in round goby. Olfactory receptor neurons were visualized in cryostat sections stained for acetylated tubulin immunocytochemistry and by transmission electron microscopy. The olfactory epithelium is located adjacent to the tentacular anterior nostril and extends ventrocaudally along the relatively flat surface of the nasal cavity. Numerous nonmyelinated nerve fascicles formed in the lamina propria and converged into a prominent olfactory nerve. A sac-like enclosure was found on the posterior ventral surface that may regulate flow through the nares.

9

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

Kvach Y.

Oceanological Studies

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2002

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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.