Fishes of the Atlantic Rain Forest Streams: Ecological Patterns and Conservation

Abilhôa, Vinícius; Braga, Raul Rennó; Bornatowski, Hugo; Vitule, Jean R. S.

doi:10.5772/24540

Cited by 41 publications

(54 citation statements)

References 77 publications

(79 reference statements)

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“…Because heavy vegetation losses and high endemism degree, the Atlantic Rain Forest is considered one the largest hotspots in the world (Myers et al 2000;Miranda 2012). The Atlantic Rain Forest has a rich ichthyofauna, estimated about 270 species, belonging to 89 genera and 21 families (Abilhoa et al 2011;Miranda 2012). However, there are several doubts on species descriptions and on the ecological processes such as heavy water turmoil and vegetation influences on fish assemblages (Guimarães et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Ichthyofauna from the Parque Nacional da Serra dos Órgãos and its surrounding areas, Rio de Janeiro state, Brazil

Camilo¹,

Terra²,

Araújo³

2015

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Abstract:This study provides a list of freshwater fishes of the Parque Nacional da Serra dos Órgãos (PARNASO; Rio de Janeiro state, Brazil) and its surrounding areas. Fish samplings were performed by electrofishing during the dry season (2010 -2011) in three different areas: 1, inside of the PARNASO (2 sites); 2, in the buffer zone (4 sites); and 3, in adjacent areas (8 sites). A total of 47 fish species in 13 families and six orders were recorded. Fish composition within the limits of the PARNASO differed from that recorded in the adjacent area, with the latter having comparatively higher species richness. The buffer area had intermediate ichthyofauna composition between the two other areas. This study enhanced knowledge on the composition and structure of the fish assemblages in PARNASO, by recording the occurrence of six new species within the park that were not included in the Management Plan of this Conservation Unit.

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Section: Introductionmentioning

confidence: 99%

Ichthyofauna from the Parque Nacional da Serra dos Órgãos and its surrounding areas, Rio de Janeiro state, Brazil

Camilo¹,

Terra²,

Araújo³

2015

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“…Frequent reproduction over an extended breeding season is an opportunistic life-history strategy to overcome hydrologically unstable environments such as creeks and streams that are subject to flash floods, and provides a mechanism to maintain and/or reestablish the structure of population in poeciliid fishes (Winemiller, Rose, 1992). In this way, the continuous input of newborn individuals would assure a higher survival rate and therefore the maintenance of a viable population in a stochastic environment (Abilhoa et al, 2011). We also found gravid females of all non-native species with small sizes, which can indicate probable dwarfing or stunting.…”

Section: Discussionmentioning

confidence: 99%

Colorful invasion in permissive Neotropical ecosystems: establishment of ornamental non-native poeciliids of the genera Poecilia/Xiphophorus (Cyprinodontiformes: Poeciliidae) and management alternatives

Magalhães

Jacobi

2017

Neotrop. ichthyol.

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Headwater creeks are environments susceptible to invasion by non-native fishes. We evaluated the reproduction of 22 populations of the non-native livebearers guppy Poecilia reticulata, black molly Poecilia sphenops, Yucatan molly Poecilia velifera, green swordtail Xiphophorus hellerii, southern platyfish Xiphophorus maculatus, and variable platyfish Xiphophorus variatus during an annual cycle in five headwater creeks located in the largest South American ornamental aquaculture center, Paraíba do Sul River basin, southeastern Brazil. With few exceptions, females of most species were found reproducing (stages 2, 3, 4) all year round in the creeks and gravid females of all species showed small sizes indicating stunting. Juveniles were frequent in all sites. The fecundity of the six poeciliids was always low in all periods. The sex ratio was biased for females in most species, both bimonthly as for the whole period. Water temperature, water level and rainfall were not significantly correlated with reproduction in any species. Therefore, most populations appeared well established. The pertinence of different management actions, such as devices to prevent fish escape, eradication with rotenone and research about negative effects on native species, is discussed in the light of current aquaculture practices in the region.Keywords: Aquaculture, Invasive species, Livebearers, Reproduction, Stream.Riachos de cabeceira são ambientes susceptíveis à invasão por peixes não-nativos. Neste trabalho, avaliou-se a reprodução de 22 populações dos poecilídeos não-nativos guppy Poecilia reticulata, molinésia preta Poecilia sphenops, molinésia Poecilia velifera, espadinha Xiphophorus hellerii, plati Xiphophorus maculatus e plati variado Xiphophorus variatus durante diferentes anos em cinco riachos de cabeceira localizados no maior polo de piscicultura ornamental da América do Sul, bacia do rio Paraíba do Sul, sudeste do Brasil. Foram encontradas fêmeas da maioria das espécies em reprodução (estágios 2, 3, 4), durante todos os anos nos riachos e fêmeas grávidas de todas as espécies apresentaram pequeno tamanho indicando nanismo. Juvenis de todas as espécies foram frequentes em todos os locais. A fecundidade das seis espécies sempre foi baixa em todos os períodos. Para os períodos bimestrais e totais, encontrou-se mais fêmeas que machos na maioria das espécies. Temperatura e nível de água dos riachos, bem como precipitação pluviométrica não foram correlacionadas com a reprodução. Todas as populações estão estabelecidas nos locais e ações de gerenciamento como dispositivos para impedir a fuga de peixes, erradicação com rotenona e pesquisa científica sobre os efeitos negativos nas espécies nativas são discutidas em relação às práticas de piscicultura na região.

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“…The lower order channel segments of the Tibagi basin have a high richness of small size fish species, but also show a wide richness variation among different tributaries (Shibatta & Cheida 2003). Abilhoa et al (2011) analyzing ecological patterns and conservation of the Atlantic Rain Forest streams pointed that it's highly important to divide areas into units with similar fish assemblages, natural communities and ecosystem dynamic. Thus, this study aimed to verify whether the mountain streams of the Tibagi river basin present spatial and temporal patterns in their structure and composition of the fish assemblage.…”

Section: Introductionmentioning

confidence: 99%

Longitudinal patterns of fish assemblages in mountain streams from tropical forest biome

et al. 2013

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Abstract:The aim of this study was to verify structure patterns in fish assemblages in mountain streams of the Rio Tibagi basin through the characterization of spatial and temporal variations in the composition of fish species. Samples were collected in three segments of the Varanal, João Pinheiro and Rio Preto streams. We collected 1154 specimens belonging to 21 species. The most abundant orders were Characiformes (59.01 ± 2.84%) and Siluriformes (39.34 ± 2.82%). Phalloceros harpagos was the most abundant species with 433 individuals, followed by Trichomycterus aff. davisi, with 292 individuals. No temporal variations (between seasons) were detected, but the cluster analysis suggests a separation of species composition between the segments closer to the headwaters and those more distant. The first two axes of the Canonical Correspondence Analysis (CCA) explained 80.09% of the variation in species abundance, and the variables that structured the fish assemblages in those streams were the stream width, depth, water speed, flow rate, conductivity and pH. Resumo: O objetivo deste trabalho foi verificar padrões na estrutura de assembleias de peixes nos riachos de montanha da bacia do rio Tibagi através da caracterização de variações espaciais e temporais na composição de espécies de peixes. Foram realizadas coletas em três trechos dos riachos Varanal, João Pinheiro e Rio Preto. No total foram coletadas 21 espécies, em um total de 1154 indivíduos. As ordens mais abundantes foram Characiformes (59,01 ± 2,84%) e Siluriformes (39,34 ± 2,82%). Phalloceros harpagos foi a espécie mais abundante, com 433 indivíduos, seguida por Trichomycterus aff.davisi com 292 indivíduos. Não foi verificada variação temporal (entre estações), mas a análise de agrupamento sugere uma separação na composição de espécies entre os trechos mais próximos das nascentes dos trechos mais afastados. Os dois primeiros eixos da Análise de Correspondência Canônica (CCA) explicaram 80,09% da variação na distribuição em abundância das espécies de peixes, sendo que as variáveis que estruturam a assembleia de peixes nos riachos estudados foram a largura, a profundidade, a velocidade da água, a vazão, a condutividade e o pH dos riachos. Palavras-chave: ictiofauna, peixes de água doce, peixes neotropicais, riachos de baixa ordem, bacia do rio Tibagi. 65Patterns of fish assemblages in mountain streams http://www.biotaneotropica.org.br Biota Neotrop., vol. 13, no. 3 composition and possible relationships between the sampled species and environmental variables in each sampled segment. In this way, we hope to contribute to the knowledge about the ecology of mountain stream fishes of the Atlantic Rain Forest. Material and Methods Study areaSamples were taken in the headwater, middle portion and mouth segments of the Varanal, João Pinheiro and in the upper portion of the Rio Preto streams (Figures 1 and 2). The order of each sampled segment was defined with aid of cartographic letters with scale 1:250,000 (Strahler 1957). The Varanal stream is a tributary of the...

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Fishes of the Atlantic Rain Forest Streams: Ecological Patterns and Conservation

Cited by 41 publications

References 77 publications

Ichthyofauna from the Parque Nacional da Serra dos Órgãos and its surrounding areas, Rio de Janeiro state, Brazil

Ichthyofauna from the Parque Nacional da Serra dos Órgãos and its surrounding areas, Rio de Janeiro state, Brazil

Colorful invasion in permissive Neotropical ecosystems: establishment of ornamental non-native poeciliids of the genera Poecilia/Xiphophorus (Cyprinodontiformes: Poeciliidae) and management alternatives

Longitudinal patterns of fish assemblages in mountain streams from tropical forest biome

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