scholarly journals Effects of the construction of a reservoir on the fish assemblage in an inflow river

2008 ◽  
Vol 53 (No. 12) ◽  
pp. 537-547 ◽  
Author(s):  
M. Hladík ◽  
J. Kubečka ◽  
T. Mrkvička ◽  
M. Čech ◽  
V. Draštík ◽  
...  
Keyword(s):  
Fish Species ◽  
Fish Assemblage ◽  
Fish Fauna ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
Abundant Species ◽  
Esox Lucius ◽  
Římov Reservoir ◽  
Riverine Fish

The construction of the Římov Reservoir on the Malše River in 1978 significantly influenced the fish assemblage within the river, above the reservoir. Fish species that had successfully colonised the reservoir after impoundment expanded to the inflowing river. The changes in the riverine fish assemblage up to the first impassable weir (4 km upstream) reflected the development of the reservoir assemblage after an impoundment boom of pike (<i>Esox lucius</i>), then the perch (<i>Perca fluviatilis</i>) dominated phase and later the final cyprinid-dominated phase. The changes in the fish fauna over the period 1978–2002 were significant (&chi;<sup>2</sup>, <i>P</i> < 0.001). During the cyprinid-dominated phase, roach (<i>Rutilus rutilus</i>) became the most abundant species both in the reservoir and in the river, outnumbering the pristine river species. We conclude that the cyprinid-dominated assemblage in the reservoir can be more aggressive in interfering with the river assemblage than the percid-dominated one.

scholarly journals Fish assemblages in a coastal bay adjacent to a network of marine protected areas in southern Brazil

2016 ◽  
Vol 64 (3) ◽  
pp. 295-308 ◽  
Author(s):  
André Pereira Cattani ◽  
Fábio Gonçalves Daura Jorge ◽  
Gisela Costa Ribeiro ◽  
Leonardo Liberali Wedekin ◽  
Paulo César de Azevedo Simões Lopes ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Fish Assemblage ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Abundant Species ◽  
Environmental Data ◽  
Fish Assemblage Structure ◽  
Principal Coordinates ◽  
Coastal Bay

Abstract Baía Norte (North Bay) in Santa Catarina State is considered a typical coastal bay and is surrounded by a network of Marine Protected Areas. The objectives of this study were to describe the composition of the demersal fish assemblage, identify seasonal and spatial structures on a fine scale and evaluate the role of habitat descriptors and abiotic variables affecting the fish assemblage structure. Seasonal samplings were conducted in 2005, using bottom trawls in six pre-established areas in Baía Norte in summer, fall, winter and spring. Simultaneously with each trawl, environmental data were collected with a multiparameter probe. Temporal and spatial differences in fish abundance were tested by a PERMANOVA. To illustratethe differences detected graphically we ran a canonical analysis of principal coordinates (CAP). The influence of environmental variables on the fish fauna was evaluated using a Distant Based Linear Model (DistLM) with Akaike's information criterion (AIC). A total of 9,888 specimens, distributed in 27 families and 62 species, were collected. Citharichthys spilopterus was the most abundant species. PERMANOVA detected differences for abundance between seasons, areas and interaction among all the factors. The DISTLM selected temperature and pH. The results highlight seasonality as an important factor in the structuring of fish fauna of the study place.

Influence of Water Clarity on the Catchability of Six Freshwater Fish Species in Bottom Trawls

1992 ◽  
Vol 49 (5) ◽  
pp. 885-893 ◽  
Author(s):  
Anthone D. Buijse ◽  
Leendert A. Schaap ◽  
Tammo P. Bust
Keyword(s):  
Light Intensity ◽  
Fish Species ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
Water Clarity ◽  
Roach Rutilus Rutilus ◽  
Bream Abramis Brama ◽  
Perch Perca Fluviatilis ◽  
Class Strength ◽  
Influence Of Water

Bottom trawl surveys are carried out every autumn to estimate the relative abundance of six major fish species, especially that of pikeperch (Stizostedion lucioperca) and Eurasian perch (Perca fluviatilis), in the 182 000-ha Lake IJssel, The Netherlands. The catchability of these species is influenced by light intensity at the bottom and therefore by water clarity and water depth. In autumn, water clarity can differ greatly from day to day because of wind-mediated resuspension of sediments. Catchability of ruffe (Gymnocephalus cernua) and age 0 pikeperch showed a significant inverse relationship with light intensity at the bottom, and therefore, a correction should be made when catch data for these species are used to estimate population size or year-class strength. Results were not consistent for perch, while for smelt (Osmerus eperlanus), roach (Rutilus rutilus), and bream (Abramis brama) the influence of light intensity on catchability was not significant. Corrected and uncorrected estimates of the abundance of age 0 pikeperch, based on trawl samples, were compared to demonstrate the effect of water clarity on the estimation of year-class strength. Increased water clarity can lead to zero catches and consequently diminish the effectiveness of sampling programmes.

scholarly journals Temporal changes in fish abundance in response to hydrological variability in a dryland floodplain river

2009 ◽  
Vol 60 (2) ◽  
pp. 146 ◽  
Author(s):  
Stephen R. Balcombe ◽  
Angela H. Arthington
Keyword(s):  
Fish Assemblages ◽  
Arid Zone ◽  
Fish Fauna ◽  
Abundant Species ◽  
Channel Flows ◽  
Hydrological Variability ◽  
Dryland River ◽  
Floodplain Habitats ◽  
Riverine Fish ◽  
Harsh Conditions

Riverine fish living in unpredictable flow environments tend to be ecological generalists with traits that allow them to persist under highly variable and often harsh conditions associated with hydrological variation. Cooper Creek, an Australian dryland river, is characterised by extreme flow variability, especially in the magnitude, timing and duration of channel flows and floods, which, if they occur, do so mainly in summer. The present study examined the influence of hydrological variability on fish assemblages and abundance in four waterholes in the Windorah reach of Cooper Creek over eight occasions between 2001 and 2004. Antecedent flows had marked influences on fish species richness and assemblage structure. Following high summer flows, all waterholes supported a rich and abundant fish fauna, whereas fewer species and lower numbers were recorded following periods of zero channel flow. Recruitment of three of the four most common and abundant species was enhanced when intermittent flows inundated backwater and floodplain habitats that provide a food-rich environment. Opportunistic responses to rising channel flows and occasional large floods in Cooper Creek help to explain the prominent ‘boom’ patterns of fish production in this arid-zone river, whereas low-level recruitment during periods of low or no flow maintains populations of some species through the ‘bust’.

scholarly journals Length-weight relationships of six freshwater fish species from Lake Kirkkojärvi, Finland

2017 ◽  
Vol 75 (4) ◽  
pp. 156-159 ◽  
Author(s):  
José Gama ◽  
Maria Nyberg
Keyword(s):  
Fish Species ◽  
Goodness Of Fit ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
Specimen Size ◽  
Photographic Method ◽  
Sander Lucioperca ◽  
Gill Net ◽  
Length Measurements ◽  
Lower Limits

Abstract Length-weight relationships (LWRs) and length-length relationships (LLRs) were determined for six fish species: Alburnus alburnus, Blicca bjoerkna, Gymnocephalus cernua, Perca fluviatilis, Rutilus rutilus and Sander lucioperca caught using a Nordic multi-mesh gill net in Lake Kirkkojärvi in Southwestern Finland in August 2015. The measurements were done using a photographic method and the dataset is available on the Comprehensive R Archive Network (CRAN). The dataset was done with a scientific catch, which showed lower limits on specimen size than the ones from fisheries. The LWRs were calculated for the total length (TL) and found to be consistent with models from Finland. The length measurements were taken to the nearest 0.01 cm, which also allowed for juveniles to be represented in the model. The goodness of fit of the models is high, with the coefficients of determination above 95%. This study is the first one to estimate LWRs of fish species for this hypereutrophic lake, and is useful for fishery managers and biologists.

scholarly journals Evaluation of the Composition of Ichthyofauna in Lakes Free from Commercial Use in a Tightly Protected Area of the Wolin National Park (Poland)

Water ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 2530
Author(s):  
Marcin Biernaczyk ◽  
Konrad Wrzecionkowski ◽  
Arkadiusz Nędzarek ◽  
Katarzyna Stepanowska
Keyword(s):  
National Park ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
Abundant Species ◽  
Predatory Fish ◽  
Roach Rutilus Rutilus ◽  
Triturus Cristatus ◽  
Lissotriton Vulgaris ◽  
Bream Abramis Brama ◽  
Perch Perca Fluviatilis

The ichthyological biodiversity of Polish lakes is poorly understood, even in lakes not used for fishing and those under strict protection. With this in mind, the aim of this study was to conduct a comprehensive ichthyological survey of several lakes in the Wolin National Park (Poland). The study was conducted in Domysławskie and Gardno lakes and the anthropogenic Stara Kredownia reservoir. Each fishing exercise was conducted using benthic nets over a 12 h period. The fish caught were measured and weighed, and the species identified. Shannon-Wiener (H) and Simpson biodiversity indices were determined. The catch comprised a total of 4580 fish (of which 4391 were caught in Domysławskie Lake) belonging to 15 species, with a combined weight of 98,165 g. In general, the most prevalent species were non-predatory fish: roach (Rutilus rutilus), freshwater bream (Abramis brama), white bream (Blicca bioerkna), bleak (Alburnus alburnus), and rudd (Scardinius erythrophthalmus). Individually, perch (Perca fluviatilis) and roach (Rutilus rutilus) were the most abundant species. Ichthyofauna diversity varied greatly between the studied water bodies, with 15 species found in Domysławskie Lake and only 6 species in Gardno Lake. In Stara Kredownia Reservoir, no fish were caught, but amphibians were observed, such as great crested newts (Triturus cristatus) and common newts (Lissotriton vulgaris). Based on the results obtained, Lake Domysławskie had a higher species ichthyofauna diversity than the other ‘tench and pike’ lakes. Gardno Lake had a much lower biodiversity.

scholarly journals Variation of the ichthyofauna along the Goioerê River: an important tributary of the Piquiri-Paraná basin

2014 ◽  
Vol 104 (1) ◽  
pp. 104-112 ◽  
Author(s):  
Claudenice Dei Tos ◽  
Luiz C. Gomes ◽  
Maria A. Rodrigues
Keyword(s):  
Fish Assemblage ◽  
Fish Community ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Abundant Species ◽  
Longitudinal Distribution ◽  
Longitudinal Variation ◽  
Community Patterns ◽  
Species Dominance ◽  
Conservation And Management

The construction of reservoirs is considered an important source of impacts on the fish fauna, severely altering the structure of the assemblage. This paper aimed to describe the structure of the fish assemblage of the Goioerê River, determining its longitudinal distribution and patterns of species dominance. The evaluation of its longitudinal variation in the diversity and abundance of the fish assemblage was conducted in July and October 2004 and January and May 2005. The collections were carried out near the headwaters (Gurucaia), middle stretch (Olaria), just above the falls (Paiquerê) and downstream (Foz). Forty-four species were captured. The Gurucaia fish assemblages differed significantly from Olaria, Paiquerê and Foz. The Olaria assemblages differed significantly from the Foz. Gurucaia showed the lowest diversity and abundance of species. Astyanax aff paranae Eigenmann,1914 (78% of the total) was found to be dominant at this site. Almost the same species richness was found at Olaria and Paiquerê, although Olaria had the greatest abundance of individuals. Astyanax aff paranae, Cyphocharax modestus (Fernández-Yépez, 1948) and Astyanax altiparanae Garutti & Britski, 2000 were the top three dominants and comprised over 71% of the total number of fish caught. At Paiquerê, Astyanax altiparanae, Hypostomus aff ancistroides (Ihering, 1911) and Loricariichthys platymetopon Isbrücker & Nijssen, 1979 composed 58% of the catches. Thirty-one species were recorded at Foz, which presented the greatest richness. The most abundant species were Apareiodon affinis (Steindachner, 1879), Galeocharax knerii (Steindachner, 1879) and A.altiparanae, which contributed to 50% of the total catches in this environment.These results record the fish biodiversity and how the community is longitudinally structured in the Goioerê River, and also demonstrate how this type of evaluation is important to understanding the fish community patterns and finding solutions to problems related to the conservation and management of the basin.

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