@conference{
author = "Jaćimović, Milica and Nikolić, Dušan and Cvijanović, Gorčin and Višnjić Jeftić, Željka and Skorić, Stefan and Smederevac-Lalić, Marija",
year = "2023",
abstract = "In the sake of better understanding of the mechanisms that drive interactions between
invasive species and their ecosystems, results of selective removal of the black bullhead
(Ameiurus melas) in two different lentic systems were compared. Ponjavica Nature Park has
characteristical watercourse of the plains with very slow flow and the coastal remains of
wetlands. Markovačko reservoir was built for the needs of the irrigation system of the
nearby agricultural land. Both systems suffer dominance of the black bullhead,
characterized as a species of "globally high risk". Combining results of the mass removal,
the effects on the native fish populations have been empirically demonstrated and
quantified. Black bullhead selective removal in Ponjavica lasted from August - October
2018, April - September 2019, with 20,145 black bullhead individuals removed. It showed
decreased abundance of bleak (Alburnus alburnus) 2.3 times, while the abundances of
roach (Rutilus rutilus) and European perch (Perca fluviatilis) remained almost unchanged. A
significant increase in abundance was recorded in rudd (Scardinius erythrophthalmus) (5.3
times). The abundances of topmouth gudgeon (Pseudorasbora parva), pumpkinseed
(Lepomis gibbosus), and Prussian carp (Carassius gibelio) increased 25.5, 4.9, and 4.2 times,
respectively. The mass removal of black bullhead on Markovačko Lake lasted from August -
October 2020, April - September 2021, and 15,921 black bullhead specimens were
removed. When the post removal state from Markovačko lake was determined, two species
appeared in the sample for the first time: European perch and chub (Squalius cephalus). The
abundance of bleak increased 3 times, abundance of Prussian carp reduced 8 and black
bullhead 16 times. The abundance of roach decreased 11, rudd 10, pike-perch (Sander
lucioperca) 4 and freshwater bream (Abramis brama) 2 times. The abundances of
pumpkinseed increased 10, Monkey goby (Neogobius fluviatilis) 3 and topmouth gudgeon
2.5 times. The results showed that the fyke nets can be most effectively and selectively
applied to control the abundance of black bullhead, because simplicity and nonharmfulness
to other species. It is not possible to completely remove this species from the
ecosystem, but reduce the negative impact by suppression (removal programs) and
containment of existing state is crucial.",
publisher = "Institute of Biodiversity and Ecosystem Research Bulgarian Academy of Sciences, East and South European Network for Invasive Alien Species (ESENIAS), Danube Region Invasive Alien Species Network (DIAS)",
journal = "Joint ESENIAS and DIAS Scientific Conference and 12th ESENIAS Workshop",
title = "Results of selective removal of the black bullhead (Ameiurus melas) in two different lentic system",
pages = "126-126",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2371"
}
