Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

Daga, Vanessa Salete; Gogola, Tatiane Mary; Sanches, Paulo Vanderlei; Baumgartner, Gilmar; Baumgartner, Dirceu; Piana, Pitágoras Augusto; Gubiani, Éder André; Delariva, Rosilene Luciana

doi:10.1590/s1679-62252009000300010

Cited by 31 publications

(30 citation statements)

References 33 publications

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“…In the upper Paraná River floodplain, Nakatani et al (1997) showed that the lagoons are true nurseries offering shelter and food. In the Ilha Grande National Park, Daga et al (2009) showed the importance of two marginal lagoons for initial development of fishes. These authors found high abundances of fish larvae, both resident and migratory species, mainly in Saraiva lagoon.…”

Section: Discussionmentioning

confidence: 99%

Spatial and temporal distribution patterns of ichthyoplankton in a region affected by water regulation by dams

Gogola¹,

Daga²,

Silva³

et al. 2010

Neotrop. ichthyol.

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at 24 sampling sites. For analytical purposes, the sampling sites were grouped into upper, middle and lower areas. The upper area of the National Park had the highest egg density and should be considered the primary spawning area. The middle area should be considered a drift area, and the lower area likely functions as a growth and feeding habitat. Statistical analyses showed that the spawning was influenced by water temperature, pH, fluviometric level and rainfall, and that larval density was influenced by pH, conductivity, dissolved oxygen and rainfall. The results also revealed that the tributaries apparently are used as migratory routes by fish, and and this shows the need to protect these sites.O objetivo deste trabalho foi estudar a ocorrência de ictioplâncton em uma região sob influência de barragens. A área de estudo está localizada na região do Parque Nacional de Ilha Grande, planície de inundação do Alto Rio Paraná. Especificamente, analisamos a distribuição temporal e espacial do ictioplâncton, identificando áreas de desova e estabelecendo relações entre a abundância de ovos e larvas de peixes e algumas variáveis limnológicas e hidrológicas. Amostras foram coletadas mensalmente entre outubro e março de 2001 a 2005 em 24 pontos de amostragem. Para fins de análise as estações de amostragens foram agrupadas em área superior, média e inferior. A parte superior da área do Parque Nacional apresentou a maior densidade de ovos e pode ser considerada como local de desova, enquanto que a área central pode ser considerada local de deriva, e a área inferior funciona como um provável local de crescimento e alimentação das larvas. As análises estatísticas mostraram que as desovas foram influenciadas pela temperatura da água, pH, nível fluviométrico e precipitação, e que a densidade de larvas foi influenciada pelo pH, condutividade, oxigênio dissolvido e precipitação. Os resultados também revelaram que os afluentes aparentemente são utilizados como rotas migratórias de peixes, e isso demonstra a necessidade de proteção destes locais.

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Section: Discussionmentioning

confidence: 99%

Spatial and temporal distribution patterns of ichthyoplankton in a region affected by water regulation by dams

Gogola¹,

Daga²,

Silva³

et al. 2010

Neotrop. ichthyol.

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“…These tributaries, in addition to maintaining the reproduction events, have still contributed with the input of larvae to the downstream stretches. Numerous studies carried out in this basin Daga et al, 2009;Gogola et al, 2010;Reynalte-Tataje et al, 2011Da Silva et al, 2015;Silva et al, 2016) and in the basins of the rivers Uruguay (Reynalte-Tataje et al, 2008, 2012aHermes-Silva et al, 2009;Corrêa et al, 2011) and São Francisco (Sato et al, 2005;Weber et al, 2013;Normando et al, 2014;Nunes et al, 2015), as well as in other parts of the world (Bottcher et al, 2013;Webber et al, 2013;López-Casas et al, 2016), have argued for the importance of free-flowing tributaries upstream of regulated rivers as alternative migratory routes. Nevertheless, it is important to emphasize the need for an adequate distance between the spawning site and the complete early embryonic and larval development, preventing the drift of larvae to inappropriate places, such as reservoirs, where they can be preyed upon or settle to the substrate Olden, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…gracilima and among the migratory species, B. orbygnianus, P. lineatus and P. mesopotamicus. A study carried out in the same lagoon by Daga et al (2009) found twenty-five taxa, including the migratory species S. brasiliensis, P. corruscans, Pterodoras granulosus (Valenciennes, 1821) and Pimelodus spp. For Petry et al (2003), fish species diversity and the size of stocks of migratory species depend largely on the conservation and integrity of marginal ponds.…”

Section: Discussionmentioning

confidence: 99%

“…In this context, this study uses the abundance of eggs and larvae of fish to evaluate the importance of the main channel of the Paraná River and the areas adjacent to the floodplain in the last dam-free stretch of the basin in the Brazilian territory, for the spawning and development of fish of different reproductive guilds, in order to obtain subsidies to assist in the management and conservation policies of this area, focusing on the maintenance of dam-free areas. Unlike other studies already conducted in this area Nakatani et al, 2004;Bialetzki et al, 2005;Daga et al, 2009;Gogola et al, 2010Gogola et al, , 2013Reynalte-Tataje et al, 2011Barzotto et al, 2015), our approach in the present study allows to evaluate all biotopes (main channel, tributaries and lagoons) of this remnant at the same time, that is, a representation of how the reproductive dynamics of local species occur during reproductive events. The questions to be answered with this approach were: What are the biotopes used for spawning and development?…”

Section: Introductionmentioning

confidence: 99%

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Importance of dam-free stretches for fish reproduction: the last remnant in the Upper Paraná River

et al. 2017

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Aim: This study uses the abundance of fish eggs and larvae to evaluate the importance of the main channel of the Paraná River and the adjacent areas of the floodplain, in the last dam-free stretch in the Brazilian territory, for the spawning and development of fish of different reproductive guilds, in order to obtain subsidies to assist in the management and conservation policies of this area, focusing on the maintenance of dam-free areas. Methods: Data were taken quarterly from August 2013 to May 2015, in 25 sites, grouped into three biotopes: main channel, tributaries and lagoons. Possible spatial variations in fish spawning and development as well as composition and structure of larvae were evaluated. Results: Higher densities of eggs were found in tributaries (Paracaí and Amambai rivers) and greater densities of larvae were observed in lagoons (Saraiva). Significant differences in composition and structure of larvae were detected only between sampling stations. As for taxonomic composition, 29 taxa were recorded, mostly non-migratory. However, long-distance migratory were also widely distributed, such as Brycon orbignyanus, Pseudoplatystoma corruscans, Prochilodus lineatus, Piaractus mesopotamicus and Rhaphiodon vulpinus, as well as invasive species Platanichthys platana and Hemiodus orthonops. In turn, Salminus brasiliensis presented low occurrence. Conclusions: This study evidenced that different species spawn in the region, mainly in tributaries, and their eggs and larvae are transported to the main channel of the Paraná River and adjacent lagoons, to complete their early development. The capture of larvae of important migratory species suggests that this environment still exhibits suitable conditions for their reproduction, mainly due to the presence of dam-free tributaries. Also, they emphasize the importance of the integrity of these environments for the maintenance of the regional fish fauna, and it is extremely important the monitoring of reproduction of the most endangered species, as well as of invasive species.

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“…Among the kinds of lakes occurring in the Amazon region are the oxbow lakes formed in abandoned meanders, which are important for the maintenance and integrity of regional biological diversity, both as natural nurseries of commercially important species of fishes, and as the preferred habitat of sedentary and small-sized species (Hamilton & Lewis, 1987;Daga et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Effects of flood regime on the diet of Triportheus curtus (Garman, 1890) in an Amazonian floodplain lake

et al. 2011

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We analyzed the diet of Triportheus curtus in Lake Amapá on the Acre River (AC -Brazil), during three distinct phases of the hydrological cycle (pre-flooding, flooding, and post-flooding stages). The flooding occurred between January and June of 2009. Samples were collected monthly from October 2008 through September 2009. After collection (at 19:00, 01:00, 07:00, and 13:00 hs) and taxonomic identification, fish were eviscerated and their stomachs preserved in a 4% formalin solution for later analysis. The diet was evaluated by the Index of Relative Importance (IRI), and temporal variations (pre-flooding, flooding, and post-flooding) in the diet were summarized by an ordination technique (DCA). The diet of T. curtus was comprised of several orders of insects and microcrustaceans. In the pre-flooding stage, more than 62% of the diet consisted of Ostracoda. In the flooding phase, T. curtus fed mainly on Chaoboridae larvae (Diptera) (44.3%) and terrestrial insects (fragments) (33.7%). In the post-flooding phase, Chaoboridae comprised 80% of the diet. These results indicate that the utilization of food resources by T. curtus was variable, changing with alterations in the availability of resources, as influenced by the hydrological cycle. The population of T. curtus proved to be opportunistic, changing its diet in the course of the hydrological cycle.Neste estudo avaliamos a dieta de Triportheus curtus, no lago Amapá, rio Acre (AC -Brasil), em três períodos distintos do ciclo hidrológico (pré-pulso, pulso e pós-pulso). As coletas foram realizadas mensalmente de outubro de 2008 a setembro de 2009, e o pulso de cheia ocorreu entre janeiro e junho de 2009. Após as despescas (19:00, 01:00, 07:00 e 13:00 hs) e identificação taxonômica, os indivíduos foram eviscerados e os estômagos preservados em formalina 4% para posterior análise. A dieta foi avaliada através do Índice de Importância Relativa (IRI), e as variações temporais (pré-pulso, pulso e pós-pulso) na dieta foram sumarizadas através de uma análise de ordenação (DCA). A dieta de T. curtus foi composta de insetos de diferentes ordens e microcrustáceos. No pré-pulso, aproximadamente 62% da dieta foi composta por Ostracoda. No pulso, T. curtus consumiu principalmente larvas de Chaoboridae (Diptera) (44,3%) e insetos terrestres (fragmentos) (33,7%). No pós-pulso, larvas de Chaoboridae representaram 80% da dieta. Estes resultados indicam que a dieta de T. curtus varia temporalmente, e que a espécie pode ser considerada oportunista, alterando sua dieta de acordo com a abundância dos recursos nas diferentes fases do ciclo hidrológico.

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Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

Cited by 31 publications

References 33 publications

Spatial and temporal distribution patterns of ichthyoplankton in a region affected by water regulation by dams

Spatial and temporal distribution patterns of ichthyoplankton in a region affected by water regulation by dams

Importance of dam-free stretches for fish reproduction: the last remnant in the Upper Paraná River

Effects of flood regime on the diet of Triportheus curtus (Garman, 1890) in an Amazonian floodplain lake

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