Morphology of Bluntnose Minnow Pimephales Notatus (Cyprinidae) Covaries with Habitat in a Central Indiana Watershed

摘要: Morphological variation of taxa frequently is correlated with local environmental variation. We tested for covariation in morphology and variables bluntnose minnow Pimephales notatus from 10 sites central Indiana. used principal components analysis (PCA) to summarize geomorphic morphometrics (procrustes method relative warp analysis) morphological among individuals. MANCOVA test attributable variation, body size, sexual dimorphism. Additionally, we linear discriminant (LDA) identify if varies Individual scores were separated by sex habitat PC axes using Pearson's correlations. identified shape that was environment irrespective size or sex. Individuals deeper-bodies tended occur deeper wider streams increased discharge. fusiform (e.g., slender elongated snouts) at current velocity. Although the male female individuals covaried similarly LDA significantly distinguished females, which had distended abdomens, narrower caudal peduncle dorsal fin bases, slightly upturned head shapes compared males. suggest may be a product phenotypic plasticity contribute toward success species broad physicochemical tolerances enhancing their ability occupy wide range hydrological conditions.