Geographic and environmental variation in Bryconops sp. cf. melanurus (Ostariophysi: Characidae) from the Brazilian Pantanal
Morphometric analyses of 220 specimens of a characid, Bryconops sp. cf. melanurus, from the Brazilian Pantanal were used to describe allometric growth in that species and determine whether specimens from highland habitats were more streamlined than those from lowland habitats. Relative warp analysis...
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| Veröffentlicht in: | Ichthyological research 2006-02, Vol.53 (1), p.24-33 |
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| creator | Sidlauskas, B.(University of Chicago (USA)) Chernoff, B Machado-Allison, A |
| description | Morphometric analyses of 220 specimens of a characid, Bryconops sp. cf. melanurus, from the Brazilian Pantanal were used to describe allometric growth in that species and determine whether specimens from highland habitats were more streamlined than those from lowland habitats. Relative warp analysis of 14 landmarks and principal component analysis of 28 interlandmark distances returned complementary results. The increased streamlining of the highland specimens is highly consistent with known inductive effects of high water velocity on fish phenotypes. Genetic differentiation and inductive effects of temperature variation are also potential explanations of the observed phenotypic differentiation. |
| doi_str_mv | 10.1007/s10228-005-0310-6 |
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Relative warp analysis of 14 landmarks and principal component analysis of 28 interlandmark distances returned complementary results. The increased streamlining of the highland specimens is highly consistent with known inductive effects of high water velocity on fish phenotypes. 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| subjects | ANATOMIA ANIMAL ANATOMIE ANIMALE ANIMAL MORPHOLOGY BIOLOGICAL DIFFERENCES BRASIL BRAZIL BRESIL Bryconops melanurus CHARACIDAE DIFERENCIAS BIOLOGICAS DIFFERENCE BIOLOGIQUE ENVIRONMENTAL FACTORS FACTEUR DU MILIEU FACTORES AMBIENTALES Freshwater GEOGRAFIA GEOGRAPHIE GEOGRAPHY Ostariophysi Principal components analysis |
| title | Geographic and environmental variation in Bryconops sp. cf. melanurus (Ostariophysi: Characidae) from the Brazilian Pantanal |
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