Возрастные особенности прооксидантно-антиоксидантной системы крови бычка-кругляка Neogobius melanostomus (Pallas, 1814) из Черного и Азовского морей

Труды Карадагской научной станции им. Т.И. Вяземского - природного заповедника РАН ◽

10.21072/eco.2021.20.02 ◽

2021 ◽

pp. 10-15

Author(s):

Т. Б. Сигачева

Keyword(s):

Проведён анализ возрастных изменений показателей прооксидантно-антиоксидантной системы (активности каталазы (КАТ), супероксиддисмутазы (СОД), пероксидазы (ПЕР), глутатионредуктазы (ГР), глутатионтрансферазы (ГТ) и содержания продуктов окислительной модификации белков (ОМБ)) крови бычка-кругляка Neogobius melanostomus (Pallas, 1814) из прибрежных районов Чёрного (г. Севастополь) и юго-западной части Азовского морей. Установлено достоверное снижение активности КАТ и ГР в эритроцитах крови рыб из Чёрного моря в возрасте 2+ по сравнению с группой 0+–1+ и увеличение уровня ОМБ в сыворотке крови рыб старших возрастных групп. У азовских бычков отмечена аналогичная зависимость: активность СОД и ГР была достоверно ниже в крови рыб в возрасте 2+ по сравнению с группой 0+–1+. При этом достоверных изменений уровня ОМБ в сыворотке их крови не обнаружено. Выявлен более высокий уровень ОМБ в сыворотке крови бычка-кругляка из Чёрного моря по сравнению с таковым у одновозрастных особей из Азовского моря, что может свидетельствовать о менее экологически благополучном состоянии севастопольских акваторий. Полученные результаты позволяют рекомендовать проведение биоиндикационных исследований с применением показателей прооксидантноантиоксидантной системы крови бычка-кругляка на особях одной возрастной группы.

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Morphometric variability in round goby Neogobius melanostomus (Perciformes: Gobiidae) from the Sea of Azov

Zoosystematica Rossica ◽

10.31610/zsr/2017.26.2.392 ◽

2017 ◽

Vol 26 (2) ◽

pp. 392-405 ◽

Cited By ~ 1

Author(s):

O.A. Diripasko ◽

T.A. Zabroda

Keyword(s):

Round Goby ◽

Joint Effect ◽

Neogobius Melanostomus ◽

Sea Of Azov ◽

Morphometric Characters ◽

One Dimensional ◽

The Sea Of Azov ◽

Size Dependent ◽

Size Variability ◽

Males And Females

A total of 38 morphometric characters of the round goby Neogobius melanostomus melanostomus (Pallas, 1814) were studied in its native range in the Sea of Azov. The aim was to assess joint effect of sexual dimorphism and size variability on overall variability within groups of samples (populations) using appropriate methods of traditional statistical analysis (one-dimensional and multivariate statistics). Sex and size-dependent variability was studied based on model samples of males and females of different size. Most of the studied morphometric characters of round goby from the Sea of Azov demonstrated statistically significant sex- and size-dependent in-group variability. The pattern of the variability suggests that, for a comparison of round goby from different sea regions and between populations, separate samples of males and females within the range 9–13 cm SL should be examined in order to minimise the effect of the size and sex factors. The approach of searching for the most informative size range could be useful not only for further studies of infraspecific variation but for comparisons between morphologically close gobiin species.

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Neogobius melanostomus: Freyhof, J. & Kottelat, M.

IUCN Red List of Threatened Species ◽

10.2305/iucn.uk.2008.rlts.t14524a4442374.en ◽

2008 ◽

Author(s):

Keyword(s):

Neogobius Melanostomus

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Breathing space: deoxygenation of aquatic environments can drive differential ecological impacts across biological invasion stages

Biological Invasions ◽

10.1007/s10530-021-02542-3 ◽

2021 ◽

Author(s):

James W. E. Dickey ◽

Neil E. Coughlan ◽

Jaimie T. A. Dick ◽

Vincent Médoc ◽

Monica McCard ◽

...

Keyword(s):

Climate Change ◽

Oxygen Saturation ◽

Ecological Impacts ◽

Neogobius Melanostomus ◽

Aquatic Environments ◽

Relative Impact ◽

Low Oxygen ◽

Per Capita ◽

The Impact ◽

Prey Populations

AbstractThe influence of climate change on the ecological impacts of invasive alien species (IAS) remains understudied, with deoxygenation of aquatic environments often-overlooked as a consequence of climate change. Here, we therefore assessed how oxygen saturation affects the ecological impact of a predatory invasive fish, the Ponto-Caspian round goby (Neogobius melanostomus), relative to a co-occurring endangered European native analogue, the bullhead (Cottus gobio) experiencing decline in the presence of the IAS. In individual trials and mesocosms, we assessed the effect of high, medium and low (90%, 60% and 30%) oxygen saturation on: (1) functional responses (FRs) of the IAS and native, i.e. per capita feeding rates; (2) the impact on prey populations exerted; and (3) how combined impacts of both fishes change over invasion stages (Pre-invasion, Arrival, Replacement, Proliferation). Both species showed Type II potentially destabilising FRs, but at low oxygen saturation, the invader had a significantly higher feeding rate than the native. Relative Impact Potential, combining fish per capita effects and population abundances, revealed that low oxygen saturation exacerbates the high relative impact of the invader. The Relative Total Impact Potential (RTIP), modelling both consumer species’ impacts on prey populations in a system, was consistently higher at low oxygen saturation and especially high during invader Proliferation. In the mesocosm experiment, low oxygen lowered RTIP where both species were present, but again the IAS retained high relative impact during Replacement and Proliferation stages at low oxygen. We also found evidence of multiple predator effects, principally antagonism. We highlight the threat posed to native communities by IAS alongside climate-related stressors, but note that solutions may be available to remedy hypoxia and potentially mitigate impacts across invasion stages.

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Feeding activity and diet composition of round goby (Neogobius melanostomus, Pallas 1814) in the coastal waters of SE Baltic Sea

Oceanological and Hydrobiological Studies ◽

10.1515/ohs-2015-0048 ◽

2015 ◽

Vol 44 (4) ◽

Cited By ~ 7

Author(s):

Artūras Skabeikis ◽

Jūratė Lesutienė

Keyword(s):

Baltic Sea ◽

Coastal Waters ◽

Diet Composition ◽

Feeding Activity ◽

Macoma Balthica ◽

Round Goby ◽

Benthic Fauna ◽

Neogobius Melanostomus ◽

The Body ◽

Gut Contents

AbstractFeeding activity and diet composition of round goby were investigated in the south-eastern Baltic Sea, the Lithuanian coastal waters during May-October 2012 in order to determine main feeding objects and seasonal periods when native fauna could be most affected by predation of this highly invasive species. In total, prey represented by 18 taxa was found in the gut contents of dissected fish. Feeding activity of round goby varied depending on the body size, sex and stage of the reproduction period. The gut contents of < 50 mm specimens were dominated by zooplanktonic and meiobenthic organisms, whereas larger individuals (50–99 mm) shifted to amphipods and mollusks. Individuals of the intermediate 100-200 mm length had a variable diet, changing depending on the season; in spring they mostly preyed on Macoma balthica, in summer − on polychaetes, while in autumn the contribution of Mytilus trossulus and fish considerably increased in their diet. Diet composition of individuals ≥ 200 mm was relatively constant in the course of the study with substantial preference to M. balthica. These findings imply that benthic fauna, particularly a newly settled generation of epibenthic mollusks in autumn is under strong predatory pressure of the round goby.

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