Analyses of intestinal content of round goby Neogobius melanostomus (Pallas, 1814) in the Serbian part of the Danube River Basin
2019
Аутори:
Đikanović, VesnaSkorić, Stefan
Mićković, Branislav
Остала ауторства
Trajanovski, SashoTrichkova, Teodora
Tomov, Rumen
Vladimirov, Vladimir
Kalcheva, Hristina
Zdraveski, Konstantin
Тип документа:
Конференцијски прилог (Објављена верзија)
,
© 2019 by the PSI Hydrobilogical Institute Ohrid (HIO)
Метаподаци
Приказ свих података о документуАпстракт:
In the Serbian part of the Danube River, of the 25 fish species recorded, five species from
the Gobiidae family have a participation with 10-20%. Since the early seventies, the
spreading of the gobiids along the Danube River has been reported, mainly owing to the
construction of dams and channels linking larger rivers. The round goby Neogobius
melanostomus is a fairly small bottom-dwelling fish, living in brackish and freshwater
environments. It is typically found near sandy, stony bottoms. This fish mostly stays in one
place with noticeably restricted movement. A patchy distribution and long distances
between native regions of occurrence and newly settled areas is characteristic for the
current world distribution of the species. Most probably, transport has occurred in ballast
waters. The aim of our study was to analyse the intestinal content of round goby in the
Serbian part of the Danube River Basin.
The fish samples were collected during October 2018 at three localities in the
Danube River (Zemun and Stari Slankamen) and Velika Morava River (Ljubičevo). A total of
35 individuals of round goby were collected and examined. Fish were caught with
electrofishing ((HONDA 1,2кW, 6 А) and transported to the laboratory, where the analysis
of their intestines for food items was conducted. The intestines were examined under an
Olympus binocular microscope and an Olympus stereomicroscope. Identification was
carried out to the species level, using the appropriate identification keys.
At the locality Ljubičevo, eight from 18 sampled specimens were without intestine
content. At the localities Zemun and Stari Slankamen, one specimen of ten and seven,
respectively, was without food items. The analysis showed that the intestinal content of
the round gobies consisted of representatives of the family Gammaridae (Dikerogammarus
sp.), insect larvae (Trichoptera), Gastropoda, Bivalvia (family Unionidae) and Oligochaeta.
The diet of fish samples from Ljubičevo consisted mostly of gammarids and oligochaets,
while this of fish from Zemun and Stari Slankamen from caddisfly larvae and molluscs.
Round gobies are voracious feeders, eating mussels and other molluscs, with up to 60% of
their diet made up of mussels in some places. They also eat aquatic insect larvae and the
young and eggs of other fish.
Кључне речи:
Food items; round goby; Danube River; Velika Morava RiverФинансирање / пројекти:
- Рибе као биоиндикатори стања квалитета отворених вода Србије (RS-MESTD-Basic Research (BR or ON)-173045)
- Мерење и моделирање физичких, хемијских, биолошких и морфодинамичких параметара река и водних акумулација (RS-MESTD-Technological Development (TD or TR)-37009)
У:
- Trajanovski S, Trichkova T, Tomov R, Vladimirov V, Kalcheva H, Zdraveski K, editors. Book of Abstracts. Species, ecosystems and areas of conservation concern under threat from the invasive alien species; Joint ESENIAS and DIAS Scientific Conference and 9th ESENIAS Workshop; 2019 Sep 3-6; Ohrid Republic of North Macedonia. Ohrid: PSI Hydrobilogical Institute Ohrid (HIO); 2019. p. 109.