Invasive round goby <scp><i>Neogobius melanostomus</i></scp> has sex‐dependent locomotor activity and is under‐represented in catches from passive fishing gear compared with seine catches

Žák, Jakub; Jůza, Tomáš; Blabolil, Petr; Baran, Roman; Bartoň, Daniel; Draštík, Vladislav; Frouzová, Jaroslava; Holubová, Michaela; Ketelaars, Henk A. M.; Kočvara, Luboš; Kubečka, Jan; Mrkvička, Tomáš; Muška, Milan; Říha, Milan; Sajdlová, Zuzana; Šmejkal, Marek; Tušer, Michal; Vašek, Mojmír; Vejřík, Lukáš; Vejříková, Ivana; Wagenvoort, Arco J.

doi:10.1111/jfb.13646

Cited by 9 publications

(2 citation statements)

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“…Sex‐biased movement seems to be related to mating systems in the guppy (Croft et al ., 2003a) and the round goby (Žák et al ., 2018). Considering that females are the mate‐searching sex, this might also be the case in P. taeniatus .…”

Section: Discussionmentioning

confidence: 99%

Environmental habituation and sexual composition affect juveniles' shoaling activity in a cichlid fish (Pelvicachromis taeniatus)

Schons

Vitt

Thünken

2021

Journal of Fish Biology

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Group living is widespread in animals, and many fishes form shoals. Examining within‐group interactions in fishes may contribute to the general understanding of dynamic social structures in animals. The sex ratio of a group has been shown to influence grouping decisions of fishes and can be expected to affect behaviour at group level. Behavioural experiments usually involve relatively short acclimatisation times, although the establishment of environmental habituation in fishes is understudied. This study tests whether the sex ratio and long‐term habituation to experimental conditions influence general shoal performance (activity parameters, density) and responses of shoals to an acoustic‐mechanical disturbance cue in juveniles of the cichlid fish Pelvicachromis taeniatus via individual tracking. The disturbance consisted of a defined hit against the experimental tank, which caused sudden noise and water movement. We found that a higher proportion of females increases shoal activity (swimming speed and distance covered), suggesting that female P. taeniatus are more active than males. Furthermore, shoal activity declined when shoals habituated to the experimental settings and with the time that the shoals were grouped together, which may reflect intensified group member familiarity. Moreover, behavioural changes after disturbance were weaker when individuals were kept with their group longer and more familiar to the experimental conditions. For prey species, lower activity might be beneficial under natural conditions due to lower conspicuousness of the group. We did not find any significant effects of the investigated factors on shoal density (mean interindividual distance) and speed synchronisation. The results indicate that sexual composition, familiarity between shoal members and habituation to the experimental environment affect shoal performance in a cichlid fish.

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Section: Discussionmentioning

confidence: 99%

Environmental habituation and sexual composition affect juveniles' shoaling activity in a cichlid fish (Pelvicachromis taeniatus)

Schons

Vitt

Thünken

2021

Journal of Fish Biology

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“…As such, the selection of the sampling method depends on the habitat characteristics and objective of the research (Portt et al ., 2006). Both active and passive sampling methods can have different levels and directions of sampling bias (Žák et al ., 2018). The catch in passive methods such as fyke‐nets or fish‐traps depends on fish activity, therefore migrating fish are usually targeted (Hladík & Kubečka, 2003).…”

Section: Introductionmentioning

confidence: 99%

A comparative study of three fishery methods for sampling the invasive topmouth gudgeon (Pseudorasbora parva) in ponds

Kajgrová

Drozd

Regenda

et al. 2023

Journal of Fish Biology

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Invasive fish threaten ponds' ecological status and their ecosystem services, therefore obtaining a representative sample of fish community composition is fundamental to fishery management, research and nature conservation. Estimates of the size distribution, density and biomass of the topmouth gudgeon (Pseudorasbora parva) model species of invasive fish in three ponds were compared among three sampling methods: electrofishing, fish‐trapping and throw‐netting. The study illustrates that the invasive fish, P. parva, can be detected by all tested fishing methods, yet our results clearly showed that there are pronounced differences among methods in population characteristic estimates. Electrofishing and throw‐netting gave biased information on the size distribution of P. parva. Fish‐trapping and throw‐netting gave reasonable P. parva density and biomass estimates, while electrofishing clearly underestimated it. All tested methods showed a body size increment of P. parva between summer and autumn sampling sessions, yet neither throw‐netting nor electrofishing recorded an increment in its density. Our study showed that fish‐trapping is the most reliable and affordable method to estimate invasive P. parva population characteristics in ponds despite more time‐demanding sampling. The success depends on the mesh size of sampling gear, operator skill and habitat structure. The cost‐effectiveness of the selected methods and the importance of invasive fish monitoring in ponds is discussed. The sampling gear must be considered carefully according to the aim of the monitoring.

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Sexual size dimorphism of two common European percid fish: linkage with spatial distribution and diet

et al. 2022

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Invasive round goby Neogobius melanostomus has sex‐dependent locomotor activity and is under‐represented in catches from passive fishing gear compared with seine catches

Cited by 9 publications

References 50 publications

Environmental habituation and sexual composition affect juveniles' shoaling activity in a cichlid fish (Pelvicachromis taeniatus)

Environmental habituation and sexual composition affect juveniles' shoaling activity in a cichlid fish (Pelvicachromis taeniatus)

A comparative study of three fishery methods for sampling the invasive topmouth gudgeon (Pseudorasbora parva) in ponds

Sexual size dimorphism of two common European percid fish: linkage with spatial distribution and diet

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