Seasonal and Diel Changes of Young‐of‐the‐Year Fish in the Channelised Stretch of the Vltava River (Bohemia, Czech Republic)

Slavík, Ondřej; Bartoš, Luděk

doi:10.1002/9780470696026.ch8

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…Brosse & Lek (2002) discovered that 0+ year perch tended to colonize areas with considerable structural heterogeneity (shallow and gently sloping littoral areas with moderate densities of macrophytes). Such habitat preferences suggest a trade‐off between the search for food and the requirement for shelter from predation (Slavík & Bartoš, 2000; Brosse & Lek, 2002).…”

Section: Discussionmentioning

confidence: 99%

Distribution patterns of fishes in a canyon‐shaped reservoir

Prchalová

Kubečka

Vašek

et al. 2008

Journal of Fish Biology

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and 2005, an extensive study of the fish community was carried out in the largest water supply reservoir in the Czech Republic and Central Europe, the canyon-shaped Ž elivka Reservoir, using a fleet of Nordic multimesh gillnets. Fishes were sampled at eight locations along the longitudinal profile of the reservoir and at five benthic depth layers covering depths from the surface down to 18 m (benthic gillnet 1Á5 m high), and at three pelagic depth layers down to the depth of 5 m above the bottom (pelagic gillnets 4Á5 m high). Catches of both juvenile (age 0þ year) and adult (fishes >1 year) fishes were highest in the upper layers of the water column (i.e. in the epilimnion down to 5 m, and down to 10 m in the benthic habitats). Along the tributary-dam axis in the pelagic habitats, both juvenile and adult fishes preferred the upper part of the reservoir, where the maximum number of species and also the greatest abundance of zooplankton were found. In the benthic habitats, fishes selected location according to factors other than trophic status. More juvenile fishes were recorded in the benthic habitats than in the pelagic habitats. Depth had the largest explanatory power for predicting fish community composition, followed by the affiliation with benthic and pelagic habitats, and location on the longitudinal axis of the reservoir. The fish community was represented mainly by cyprinids and consisted of two distinct groups of species, with bleak Alburnus alburnus, rudd Scardinius erythrophthalmus and asp Aspius aspius dominating the offshore group while perch Perca fluviatilis and ruffe Gymnocephalus cernuus were affiliated with the inshore group of the adult fish community. Roach Rutilus rutilus, bream Abramis brama and pikeperch Sander lucioperca occurred in important proportions in both the inshore and the offshore zones. All species, with the exceptions of adult perch (1þ year and older), 0þ year perch and 0þ year roach, preferred the most eutrophic tributary part of the reservoir. The fish community was relatively stable between the 2 years sampled.

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Section: Discussionmentioning

confidence: 99%

Distribution patterns of fishes in a canyon‐shaped reservoir

Prchalová

Kubečka

Vašek

et al. 2008

Journal of Fish Biology

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“…Impoundments can stratify the water column, with water below the hypolimnion being up to 17°C colder than at the surface, with low-level releases having impacts up to 300 km downstream (Lugg and Copeland 2014;Michie et al 2020b). Despite CWP having been documented in many rivers throughout the world, including China (He et al 2018), North and South America (Agostinho et al 2008;Miara et al 2018), Europe (Slavik and Bartos 1997) and Australia (Lugg and Copeland 2014), its extent and impacts on fishes have received little attention globally.…”

Section: Introductionmentioning

confidence: 99%

Cold-water pollution impacts on two ‘warm-water’ riverine fish: interactions of dam size and life-history requirements

2023

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Context Temperature regulates most ecological processes in freshwater ecosystems. Anthropogenic changes to natural thermal regimes, especially cold water released from stratified impoundments (cold-water pollution, CWP), is a widespread and major threat to fish populations globally. Aims Because mitigation options for CWP are often expensive, we aimed to provide robust ecological evidence to inform expenditure. Methods We modelled population responses to CWP remediation for two warm-water fish species (Murray cod and golden perch) downstream of two impoundments (Copeton and Pindari dams) in the semi-arid northern Murray–Darling Basin, Australia. Key results Predicted populations of both species were severely affected by CWP at both sites; however, impacts were species- and site-specific. Effects were greater on golden perch than Murray cod because of their higher temperature requirements for spawning. Predicted spawning opportunities decreased by 77–100% for golden perch and by 38–92% for Murray cod. The larger Copeton Dam had greater impacts than did the smaller Pindari Dam. Conclusions Remediation of CWP can help restore populations and meeting the needs of golden perch may benefit a range of other species. Implications Globally, CWP is a serious threat to warm-water fishes that may compromise and even nullify other restoration efforts. However, restoration may be impeded by current low abundances, angler harvest and restrictions to fish passage.

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“…Diel changes in habitat use differ between fish size, species, or groups (Copp andJurajda 1993, Slavik andBartos 2000). Family Cyprinidae species, including shiners and chubs, typically alter their schooling behavior with changes in light levels, but vary little in habitat selection (Emery 1973, Odom 1987.…”

Section: Diel Changes In Habitat Selectionmentioning

confidence: 99%

Fish use of artificial dyke structures in the Kanawha River, West Virginia

Titus¹

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Artificial structures have been used in the past to potentially increase fish production by providing cover, feeding grounds and spawning areas. In some areas the US Army Corp of Engineers has constructed dykes to provide additional habitat for river fishes and to mitigate against navigable related impacts. This study is designed to test whether such structures really function as viable habitats as evidenced by increased abundances relative to natural reference areas lacking structures. Five sets of structures in the Kanawha River, West Virginia were sampled via boat electrofishing using pointabundance sampling twice monthly from June through October 2002 and 2003. We found a difference in taxa using structures relative to reference area. Cyprinidae (p = 0.5 to 0.1) and Catostomidae (p = 0.1) abundance was not dependent on artificial structure in comparison to natural reference. Artificial structures use was most important among Centrarchidae species, especially juveniles, including black bass and several species of Lepomis (p < 0.001). Further, distribution of fish between areas with and without structures appears most affected by short-term river flow in 2003 (p = 0.0008) where artificial structure serve as flow shelters (p = 0.0008) and in 2002 water temperature (p = 0.0007). These patterns suggest structures are viable mitigation measures that target and benefit fish of economic interest. Words cannot express the gratitude and the debt I owe to the following participants for unlimited encouragement, inspiration, and documentation on "the wall."

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Seasonal and Diel Changes of Young‐of‐the‐Year Fish in the Channelised Stretch of the Vltava River (Bohemia, Czech Republic)

Cited by 4 publications

References 16 publications

Distribution patterns of fishes in a canyon‐shaped reservoir

Distribution patterns of fishes in a canyon‐shaped reservoir

Cold-water pollution impacts on two ‘warm-water’ riverine fish: interactions of dam size and life-history requirements

Fish use of artificial dyke structures in the Kanawha River, West Virginia

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