Parotocinclus planicauda, a new species of the subfamily Hypoptopomatinae from Southeastern Brazil (Ostariophysi: Loricariidae)

Garavello, Júlio César; Britski, Heraldo A.

doi:10.1590/s1519-69842003000200010

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…Sexual dimorphism related to pelvic-fin length was recorded for some loricariids (Garavello and Britski 2003). To assess possible sexual dimorphism in P. maculicauda and H. notatus that could bias our interpretations, we distinguished males and females by examination of urogenital papilla.…”

Section: Ecomorphological Analysismentioning

confidence: 99%

Microhabitat segregation and fine ecomorphological dissimilarity between two closely phylogenetically related grazer fishes in an Atlantic Forest stream, Brazil

et al. 2015

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Habitat segregation is considered the most prevalent resource-partitioning mechanism for stream fishes and the species morphology can be a strong predictor of their spatial distribution. However, most studies addressing morphology-habitat relationships have defined the space in physiognomically homogeneous units (i.e., mesohabitat), probably not detecting segregation among several closely related species. Here we investigated the ecomorphology and the use of habitat in a fine spatial scale (i.e., microhabitat) by two closely phylogenetically related grazer fishes (the loricariids Parotocinclus maculicauda and Hisonotus notatus), syntopic in an Atlantic Forest stream. We conducted standardized underwater observations in two 50 m long stream sections differing in canopy condition, totaling 273 individual microhabitat records. We clearly detected microhabitat segregation between the species. In both sample sites, H. notatus remained near the stream banks and closer to shelters, while P. maculicauda predominantly occurred in more hydrodynamic microhabitats, facing higher focal current velocities and water turbulence. Differences in focal elevation and water depth (i.e., vertical segregation) were exclusively detected in the deforested site. The spatial segregation was congruent with slight interspecific morphological differences, being in accordance with hypotheses about form-function relationships previously reported for fishes. Given that the diel activity and diet of these grazer species were strongly overlapping, we believe that the observed microhabitat segregation favors resource partitioning between P. maculicauda and H. notatus, facilitating their coexistence in high abundances in the studied system. This study illustrates how the assessment of fine-tuned ecological processes can provide subsidy to management strategies aiming the conservation of tropical stream biodiversity.

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Section: Ecomorphological Analysismentioning

confidence: 99%

Microhabitat segregation and fine ecomorphological dissimilarity between two closely phylogenetically related grazer fishes in an Atlantic Forest stream, Brazil

et al. 2015

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“…Comparativamente, pode-se considerar que a ictiofauna da bacia do rio São Francisco é mais bem conhecida que a do rio Doce (e. g. Britski et al, 1988;Sato & Godinho, 1999;Alves & Pompeu, 2001a). Entretanto, trabalhos recentes têm revelado um considerável número de novas espécies, em sua maioria de pequeno porte e com distribuição restrita aos riachos localizados nas cabeceiras dos principais formadores do São Francisco (e. g. Langeani, 1990;Oyakawa, 1993;Schaefer, 1997;Oliveira & Oyakawa, 1999;Britto & Castro, 2002;Ribeiro et al, 2002;Wosiacki, 2004), situação menos freqüente no rio Doce (e. g. Garavello & Britski, 2003).…”

Section: Introductionunclassified

A ictiofauna do Parque Nacional da Serra do Cipó (Minas Gerais, Brasil) e áreas adjacentes

2005

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The Espinhaço mountain chain is the water divisor of many river basins in Minas Gerais – Brazil. The Parque Nacional da Serra do Cipó (PNSC), located in the southern portion of this mountain chain, has a considerable drainage system, including headwaters of tributaries of both the São Francisco and the Doce river drainages. Fish sampling was conducted within the PNSC and adjacent areas, in both river basins, along an altitudinal gradient. Forty-eight fish species were recorded (17 in the Doce and 36 in the São Francisco basins), and only five species were captured in both basins. Fish species attaining small sizes as adults (<15 cm) represented approximately 60% of the total richness. Fish distribution was markedly influenced by altitudinal gradient, with only two species recorded in the highest altitudes. The greatest species richness was recorded in the lower areas, outside the PNSC. Although these areas have more species, the PNSC conserves an important portion of them, including an endangered species. Distribution, biology and conservation of local ichthyofauna are presented. Keywords: Rio São Francisco, Rio Doce, altitudinal distribution, threatened fishes, conservation.

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“…O monofiletismo de Loricarioidea é principalmente sustentado pela presença de dentes tegumentares (odontódios) na superfície externa do corpo, esta condição foi definida por Peyer (1922) e confirmada por diversos autores (Bhatti, 1938;Baskin, 1973;Howes, 1983a;Schaefer & Lauder, 1986, 1996Schaefer, 1988Schaefer, , 1990de Pinna, 1993;Britto, 2002; entre outros). (Isbrücker, 1980 Brasil (Reis et al, 2006;Chamon et al, 2005;Chamon, 2004;Bockmann & Ribeiro, 2003;Britto & Moreira 2003;Garavello & Britski, 2003;Britski & Garavello, 2002;Pereira & Reis, 2002;Reis & Cardoso, 2001;Rapp Py-Daniel, 1997;Oyakawa, 1993;Langeani, 1990).…”

Section: Contexto Atual Da Família Loricariidaeunclassified

Revisão taxonômica e relações filogenéticas do gênero Leporacanthicus Isbrücker & Nijssen, 1989 (Siluriformes, Loricariidae)

Chamon¹

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Parotocinclus planicauda, a new species of the subfamily Hypoptopomatinae from Southeastern Brazil (Ostariophysi: Loricariidae)

Cited by 7 publications

References 1 publication

Microhabitat segregation and fine ecomorphological dissimilarity between two closely phylogenetically related grazer fishes in an Atlantic Forest stream, Brazil

Microhabitat segregation and fine ecomorphological dissimilarity between two closely phylogenetically related grazer fishes in an Atlantic Forest stream, Brazil

A ictiofauna do Parque Nacional da Serra do Cipó (Minas Gerais, Brasil) e áreas adjacentes

Revisão taxonômica e relações filogenéticas do gênero Leporacanthicus Isbrücker & Nijssen, 1989 (Siluriformes, Loricariidae)

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