Distribution patterns of fishes in a canyon‐shaped reservoir

In August 2004 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 Želivka 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 1·5 m high), and at three pelagic depth layers down to the depth of 5 m above the bottom (pelagic gillnets 4·5 m high). Catches of both juvenile (age 0+ 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 (1+ year and older), 0+ year perch and 0+ year roach, preferred the most eutrophic tributary part of the reservoir. The fish community was relatively stable between the 2 years sampled.

[1]  J. Kubečka,et al.  Fish habitat preferences in an artificial reservoir system , 2006 .

[2]  J. Kubečka,et al.  Size Selectivity in Summer and Winter Diets of Great Cormorant (Phalacrocorax carbo ): Does it Reflect Season-Dependent Difference in Foraging Efficiency? , 2008 .

[3]  M. Rask,et al.  Seasonal changes in the diets and relative abundances of perch and roach in the littoral and pelagic zones of a large lake , 2000 .

[4]  J. Kubečka.  Succession of fish communities in reservoirs of Central and Eastern Europe , 1993 .

[5]  D. Schindler,et al.  Changes in the Spatial Distribution of Fishes in Lakes Along a Residential Development Gradient , 2004, Ecosystems.

[6]  C. Claret.  A Method Based on Artificial Substrates to Monitor Hyporheic Biofilm Development , 1998 .

[7]  A. Linløkken,et al.  Density and temperature dependence of gill net catch per unit effort for perch, Perca fluviatilis, and roach, Rutilus rutilus , 2006 .

[8]  C. H. Fernando,et al.  Fish in Reservoirs , 1991 .

[9]  Jan Lepš,et al.  Multivariate Analysis of Ecological Data using CANOCO , 2003 .

[10]  Barbara J. Benson,et al.  Spatial Heterogeneity of Littoral Fish Assemblages in Lakes: Relation to Species Diversity and Habitat Structure , 1992 .

[11]  W. J. Matthews,et al.  Dynamics of the Offshore Fish Assemblage in a Southwestern Reservoir (Lake Texoma, Oklahoma–Texas) , 2000, Copeia.

[12]  D. Boisclair,et al.  Day-to-day variation in fish horizontal migration and its potential consequence on estimates of trophic interactions in lakes , 1998 .

[13]  B. Moss,et al.  Effects of different fish species and biomass on plankton interactions in a shallow lake , 2004, Hydrobiologia.

[14]  R. Radke,et al.  Habitat and food resource use of perch and roach in a deep mesotrophic reservoir: enough space to avoid competition? , 2006 .

[15]  W. C. Leggett,et al.  Distribution, Abundance, and Resource Utilization of Littoral Zone Fishes in Response to a Nutrient/Production Gradient in Lake Memphremagog , 1977 .

[16]  P. Fischer,et al.  Spatial distribution of littoral fish species in a large European lake, Lake Constance, Germany , 1997 .

[17]  J. Kubečka,et al.  Fish migration between a temperate reservoir and its main tributary , 2003, Hydrobiologia.

[18]  M. Olin,et al.  The effects of fish accumulation on the catchability of multimesh gillnet , 2004 .

[19]  J. Kubečka,et al.  Longitudinal and vertical spatial gradients in the distribution of fish within a canyon-shaped reservoir , 2004 .

[20]  J. Kitchell,et al.  Diel Patterns of Distribution and Feeding of Bluegill (Lepomis macrochirus) in Lake Wingra, Wisconsin , 1974 .

[21]  J. Kubečka,et al.  Overestimation of percid fishes (Percidae) in gillnet sampling , 2008 .

[22]  Jan Kubečka,et al.  Horizontal beaming as a crucial component of acoustic fish stock assessment in freshwater reservoirs , 1998 .

[23]  M. Rask,et al.  Fish community structure in mesotrophic and eutrophic lakes of southern Finland: the relative abundances of percids and cyprinids along a trophic gradient , 2002 .

[24]  Lennart Persson,et al.  Predator Regulation and Primary Production Along the Productivity Gradient of Temperate Lake Ecosystems , 1988 .

[25]  Diel migration and spatial distribution of fish in a small stratified lake , 2005 .

[26]  Wolf-Christian Lewin,et al.  Determinants of the distribution of juvenile fish in the littoral area of a shallow lake , 2004 .

[27]  A. Keast,et al.  Fish distribution and benthic invertebrate biomass relative to depth in an Ontario lake , 1977, Environmental Biology of Fishes.

[28]  P. Legendre,et al.  Partialling out the spatial component of ecological variation , 1992 .

[30]  J. Kubečka.  Night inshore migration and capture of adult fish by shore seining , 1993 .

[31]  S. Messad,et al.  Influence of site characteristics on fish community patterns in French reservoirs , 2002 .

[32]  J. Kubečka,et al.  Diel vertical migrations of bathypelagic perch fry , 2005 .

[33]  N. Jepsen,et al.  Does roach behaviour differ between shallow lakes of different environmental state , 2004 .

[34]  A Comparison of Fish Distributions in Simple and Complex Lake Basins , 2000 .

[35]  S. Lek,et al.  Fish assemblage patterns in the littoral zone of a European reservoir , 2007 .

[36]  Mary T. Bremigan,et al.  VARIABLE GIZZARD SHAD RECRUITMENT WITH RESERVOIR PRODUCTIVITY: CAUSES AND IMPLICATIONS FOR CLASSIFYING SYSTEMS , 2001 .

[37]  W. C. Leggett,et al.  Species Diversity of Littoral Zone Fishes Along a Phosphorus–Production Gradient in Lake Memphremagog, Quebec–Vermont , 1977 .

[38]  J. Holčík.  Changes in Fish Community of Klíčava Reservoir with Particular Reference to Eurasian Perch (Perca fluviatilis), 1957–72 , 1977 .

[39]  P. Eklöv,et al.  Predatory efficiency and prey selection: interactions between pike Esox lucius, perch Perca fluviatilis and rudd Scardinus erythrophthalmus , 1989 .

[40]  M. Appelberg,et al.  Development and intercalibration of methods in nordic freshwater fish monitoring , 1995 .

[41]  D. Boisclair,et al.  The influence of spatial heterogeneity on the study of fish horizontal daily migration , 1998 .

[42]  P. Eklöv,et al.  FACILITATION AMONG PISCIVOROUS PREDATORS: EFFECTS OF PREY HABITAT USE , 2001 .

[43]  Z. Gliwicz,et al.  Diel migrations of juvenile fish: a ghost of predation past or present? , 1992 .

[44]  M. Olin,et al.  Comparison of gillnet and trawl in diurnal fish community sampling , 2003, Hydrobiologia.

[45]  W. C. Leggett,et al.  Yellow Perch (Perca flavescens) Biomass Responses to Different Levels of Phytoplankton and Benthic Biomass in Lake Memphremagog, Quebec–Vermont , 1975 .

[46]  T. Mehner,et al.  Composition of fish communities in German lakes as related to lake morphology, trophic state, shore structure and human‐use intensity , 2005 .

[47]  D. Rowe.  Vertical segregation and seasonal changes in fish depth distributions between lakes of contrasting trophic status , 1994 .

[48]  Between‐year variation in community structure and biomass–size distributions of benthic lake fish communities , 1999 .

[49]  Sovan Lek,et al.  Relationships between Environmental Characteristics and the Density of Age‐0 Eurasian Perch Perca fluviatilis in the Littoral Zone of a Lake: A Nonlinear Approach , 2002 .

[50]  Juha Lilja,et al.  Upstream migration activity of cyprinids and percids in a channel, monitored by a horizontal split-beam echosounder , 2003 .

[51]  W. Hubert,et al.  Use of Spatial Resources by Fishes in Grayrocks Reservoir, Wyoming , 1992 .

[52]  T. Storck,et al.  The Distribution of Limnetic Fish Larvae in a Flood Control Reservoir in Central Illinois , 1978 .

[53]  W. J. Matthews,et al.  Predictability of littoral-zone fish communities through ontogeny in Lake Texoma, Oklahoma-Texas, USA , 2005, Environmental Biology of Fishes.

[54]  C. Braak,et al.  Canonical correspondence analysis and related multivariate methods in aquatic ecology , 1995, Aquatic Sciences.

[55]  E. Jeppesen,et al.  Habitat distribution of fish in late summer: changes along a nutrient gradient in Danish lakes , 2006 .

[56]  W. J. Matthews,et al.  Fish Assemblages of Reservoirs, Illustrated by Lake Texoma (Oklahoma-Texas, USA) as a Representative System , 2004 .

[57]  S. Diehl,et al.  Effects of Piscivore‐Mediated Habitat Use on Resources, Diet, and Growth of Perch , 1995 .

[58]  N. Jepsen,et al.  Activity and food choice of piscivorous perch (Perca fluviatilis) in a eutrophic shallow lake: a radio-telemetry study , 2002 .

[59]  J. Kubečka,et al.  Distribution and Diet of 0+ Fish within a Canyon-Shaped European Reservoir in Late Summer , 2006 .

[60]  J. Williams,et al.  Fixed versus Random Sampling of Fishes in a Large Reservoir , 1981 .

[61]  R. Eckmann,et al.  Distribution and diel vertical migration of Eurasian perch (Perca fluviatilis L.) during winter , 1996 .

[62]  J. Kubečka,et al.  Cyprinid predation on zooplankton along the longitudinal profile of a canyon-shaped reservoir , 2003 .

[63]  J. Borcherding,et al.  Lateral migrations of fishes between floodplain lakes and their drainage channels at the Lower Rhine: diel and seasonal aspects , 2002 .

[64]  J. Kubečka,et al.  Sinusoidal cycling swimming pattern of reservoir fishes , 2002 .

[65]  A. Finstad,et al.  Gillnet selectivity and size and age structure of an alpine Arctic char (Salvelinus alpinus) population , 2000 .

[66]  D. Shiode,et al.  Effect of thin twine on gill net size‐selectivity analyzed with the direct estimation method , 2001 .

[67]  M. Godlewska,et al.  The relationship between the spatial distribution of fish, zooplankton and other environmental parameters in the Solina reservoir, Poland , 2000 .