Structure of the littoral fish assemblage in an impounded tributary: the effects of macrophytes presence (subtropical region, Brazil)

Hermes-Silva, Samara; Zaniboni‐Filho, Evoy

doi:10.1590/s1519-69842012000300011

Cited by 6 publications

(5 citation statements)

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“…The number of taxa we found, at least 20 species, is comparable to other studies that also searched for fish inside macrophyte banks in Brazilian rivers and reservoirs, which varied between 22 to 26 species, but with a much higher sampling efforts -5 to 50 times more captures (Pelicice et al, 2008;Dibble & Pelicice, 2010;Hermes-Silva & Zaniboni-Filho, 2012). In terms of composition, it is also important to mention that we sampled fish species of all orders occurring in this river (Oliveira et al, 2016;Brambilla et al, 2019;Diniz et al, 2019), namely Characiformes, Siluriformes, Gymnotiformes, Synbranchiformes and Cichliformes.…”

Section: Discussionsupporting

confidence: 83%

“…The higher abundance of individuals of the Synbranchidae family in the macrophyte banks, as well as the presence of the order Gymnotiformes, can be explained by the adaptations they have such as the elongated body shape, easily camouflaged between plants, insectivorous feeding behavior, and tolerance to low oxygen concentrations (Henderson & Hamilton, 1995;Crampton & Hopkins, 2005;Bulla et al, 2011). In case of Gymnotiformes, an intensive study of Hermes-Silva & Zaniboni-Filho (2012), comparing the ichthyofauna of macrophyte and non-macrophyte areas, found the species Gymnotus carapo only inside macrophyte banks.…”

Section: Discussionmentioning

confidence: 99%

“…In some SHPs reservoirs, due to their small size and simplified morphometry, ecological functional connectivity with lateral environments may not properly exist. In this case, the occurrence of certain habitats, such as the aquatic macrophyte banks, can ensure the initial survival and consequently the regional maintenance of several fish species (Kirjasniemi & Valtonen, 1997;Wilzbach et al, 2002;Bulla et al, 2011;Hermes-Silva & Zaniboni-Filho, 2012). Two SHP's reservoirs were selected in our study, located in Sapucaí-Mirim River, north of São Paulo State, Brazil.…”

Section: Introductionmentioning

confidence: 99%

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Macrophytes banks as potential fish nursery areas in small hydropower reservoirs

et al. 2021

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Aim This study verified if the macrophyte banks found in two reservoirs of small hydroelectric plants (SHPs) have a functional ecological role for the initial development of ichthyofauna. Additionally, we compared the differences in the structure of the fish assemblages along each reservoir compartment and between reservoirs. Methods Sampling was performed in March 2018, in lotic, intermediate, and lentic compartments of Palmeiras and Retiro reservoirs, Sapucaí-Mirim River (SP). Three distinct macrophyte banks in each stretch (triplicates), considering the most representative in terms of composition (recurrency/dominance), were sampled, resulting in 18 samples (nine per reservoir). For fish collection we used a sieve of 1 m2 of area, mesh size of 1 mm, which was manually hauled, from the boat, in the marginal aquatic vegetation (three hauls per sample). Simultaneously, we measured basic limnological parameters with a Horiba U-52 water probe, adjacent to the banks. Results The presence of juveniles of all fish orders found in the river, Characiformes, Siluriformes, Synbranchiformes, Gymnotiformes and Cichliformes, demonstrates that, at least in certain moment of their development cycle, the macrophyte banks are used by species with different ecological requirements. It was observed significant statistical differences in the structure of the ichthyofauna along the longitudinal axes of the reservoirs, but not between reservoirs. The same was seen for the limnological data (PCA). Conclusions The macrophyte banks found in the SHPs reservoirs have a potential role as nurseries for the local ichthyofauna, mainly, but not exclusively, for sedentary species and with parental care. This association is ecologically relevant, given the absence of typical lateral habitats for the initial development of the fish fauna. Additionally, despite the reservoirs small size, spatial organization was also important for the assemblage’s structure, with differences in terms of composition, size and development stages along the distinct sampling stretches.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Macrophytes banks as potential fish nursery areas in small hydropower reservoirs

et al. 2021

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“…Another process strongly influenced by the formation of reservoirs and that deserves attention in the study of the Itá UHE is the development of aquatic macrophytes Pelicice et al, 2008;Hermes-Silva and Zaniboni-Filho, 2012). Among the main effects of the presence of macrophytes is the supply of abundant food for herbivorous species, such as S. nasutus (Andrade and Braga, 2005), a fish that totaled the highest biomass captured.…”

Section: Discussionmentioning

confidence: 99%

Structure dynamics of a fish community over ten years of formation in the reservoir of the hydroelectric power plant in upper Uruguay River

Schork

Zaniboni‐Filho

2017

Braz. J. Biol.

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The objective of this study was to evaluate the structure of the fish assemblage in the ten years following the closing of the lake of the Itá Hydroelectric Power Plant. Seasonal collections were conducted from 2001 to 2010. During this period, 44,834 fish were captured, totaling 3,818.01 kg, among 8 orders, 24 families and 84 species. In general, profound changes were not observed in the fish assemblage in the ten years after the formation of the Itá lake. Few species changed in dominance over time, while many were rare in the environment. The ichthyofauna in the reservoir was dominated by small and medium size opportunist species that conduct short or no migratory movements. Among the most abundant, six species were responsible for more than 50% of the numeric representation: Steindachnerina brevipinna, Astyanax fasciatus, Apareiodon affinis, Hypostomus isbrueckeri, Iheringichthys labrosus and Loricariichthys anus. The increase in the representation of the later species stood out. The biomass was dominated by Steindachneridion scriptum, Prochilodus lineatus, I. laborsus, Schizodon nasutus, Hoplias malabaricus, Acestrorhynchus pantaneiro, Hoplias lacerdae, H. isbrueckeri and L. anus. Despite the presence of large migrators in the region of the reservoir, their vulnerability was revealed by the low numeric abundance and accidental capture. The k-dominance curve of numerical abundance and biomass indicates a moderately disturbed community, in which the representation of small species was also important to the amounts of biomass.Keywords: dam, ichthyofauna, southern Brazil, temporal variation, Itá.Dinâmica da estrutura da comunidade íctica ao longo de dez anos da formação do reservatório da usina hidrelétrica no Alto Rio Uruguai Resumo O objetivo deste trabalho foi avaliar a estrutura da assembleia de peixes nos dez anos seguintes ao fechamento do lago da Usina Hidrelétrica de Itá. Para isto, foram realizadas coletas com periodicidade sazonal no período compreendido entre 2001 e 2010. Durante o período de estudo, foram capturados 44834 peixes, totalizando 3818,01 kg, distribuídos em 8 ordens, 24 famílias e 84 espécies. De uma forma geral, a assembleia de peixes não mostrou alterações profundas nos dez anos após a formação do lago de Itá. Poucas espécies alternam-se na dominância ao longo do tempo, enquanto muitas mostraram-se como raras no ambiente. A ictiofauna do reservatório foi dominada por espécies oportunistas, de pequeno e médio porte e que realizam curtos ou nenhum movimento migratório. Entre as mais abundantes, seis espécies foram responsáveis por mais de 50% da representatividade numérica, sendo elas: Steindachnerina brevipinna, Astyanax fasciatus, Apareiodon affinis, Hypostomus isbrueckeri, Iheringichthys labrosus e Loricariichthys anus. Destaque para aumento da representatividade deste último. Já para a biomassa, destacaram-se: Steindachneridion scriptum, Prochilodus lineatus, I. labrosus, Schizodon nasutus, Hoplia smalabaricus, Acestrorhynchus pantaneiro, Hoplias lacerdae, H. isbrueckeri e L. ...

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“…In addition, the downstream environment has a smaller area compared to the reservoir. According to Hermes-Silva and Zaniboni (2012), the presence of macrophytes provides different microhabitats that act as a refuge from predators as well as feeding sites. It is worth noting that gillnets were not used downstream because it is a wading area habitat.…”

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confidence: 99%

Length-weight relationship of trahira Hoplias aff. malabaricus (Bloch, 1794) in a regulated stream of southern Brazil

et al. 2016

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Submetido em 02/03/2015Aceito para publicação em 22/12/2015 ResumoRelação peso-comprimento da traíra Hoplias aff. malabaricus (Bloch, 1794) em um arroio regulado no sul do Brasil. Este trabalho apresenta um estudo alométrico da relação peso-comprimento de Hoplias aff. malabaricus coletados no reservatório e no Arroio Chasqueiro, sul do Brasil. Foram coletados 112 espécimes com comprimento total entre 124 e 386 mm. Os parâmetros estimados do modelo comprimento-peso foram estatisticamente signiicativos e mostraram um crescimento alométrico positivo para a espécie. Palavras chave: Alometria; Lagoa Mirim; Pesca; Região neotropical AbstractThis paper presents an allometric study of the length-weight relationship of Hoplias aff. malabaricus collected in the Chasqueiro Reservoir and Stream in southern Brazil. During the study, 112 specimens were collected with total lengths ranging from 124 to 386 mm. The estimated parameters of the length-weight model were statistically signiicant and showed positive allometric growth for this species.

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Structure of the littoral fish assemblage in an impounded tributary: the effects of macrophytes presence (subtropical region, Brazil)

Cited by 6 publications

References 23 publications

Macrophytes banks as potential fish nursery areas in small hydropower reservoirs

Macrophytes banks as potential fish nursery areas in small hydropower reservoirs

Structure dynamics of a fish community over ten years of formation in the reservoir of the hydroelectric power plant in upper Uruguay River

Length-weight relationship of trahira Hoplias aff. malabaricus (Bloch, 1794) in a regulated stream of southern Brazil

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