6 research outputs found
Do invasive bighead goby Neogobius kessleri and round goby N. melanostomus (Teleostei, Gobiidae) compete for food?
Bighead goby (Neogobius kessleri) and round goby (Neogobius
melanostomus) have been invading new non-native areas about two decades
successfully. In this study, diet spectrum, seasonal variation, feeding strategy and diet
overlap between these two invasive species were assessed. Materials were collected from
the Danube at Bratislava by fishing rods and/or electrofishing. The diet spectrum of both
species was diverse: a total of 46 food types in bighead goby and 51food types in round
goby were observed. Dikerogammarus sp., chironomid larvae and
Corophium sp. were the most predominant food types in bighead goby,
whereas in round goby, chironomid larvae, Corophium sp., bryozoans and
Cladocera predominated. The diet varied over seasons. In the Slovak part of the Danube,
bighead goby and round goby have adapted to local food resources, consuming diverse food
from small to large items, both with soft and/or hard body. This enhances the capability
of these invasive species to spread successfully. It appears that even if both exploit
similar food resources, their proportional content differs. Further differences between
these gobies were also found in their food behaviour and feeding strategy. Both species
tend to be specialists where possible, but round goby demonstrates higher flexibility
towards general feeding strategy
Comparison of thermal tolerance and standard metabolic rate of two Great Lakes invasive fish species
Speaking their language – Development of a multilingual decision-support tool for communicating invasive species risks to decision makers and stakeholders
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227421.pdf (publisher's version ) (Closed access
A global-scale screening of non-native aquatic organisms to identify potentially invasive species under current and future climate conditions
10.1016/j.scitotenv.2021.147868Science of the Total Environment78814786