Distribution of Fishes in the Red River of the North Basin on Multivariate Environmental Gradients

Umbridae

Central Mudminnow

Umbra limi (Kirtland), the central mudminnow, was first reported from the Red River basin by Olson (1932), who collected a single specimen from the Buffalo River near what is now the state park (Figure A52). It has been taken from every major tributary to the Red River in the eastern basin except the Mustinka and Rabbit Rivers. The central mudminnow has only once been reported from a western basin tributary, the Tongue River, where Copes and Tubb (1966) collected a single specimen. The species has been found at 13% of stream sites sampled in the Red River basin since 1962, and has preferred reaches in the NLF and NMW ecoregions, where it has been taken at 42% and 43% of the sites, respectively (Table 4). It has been most abundant in the Tamarac and Two Rivers, where site collections of 50-60 individuals are not uncommon.

Figure A52. Distribution of the central mudminnow in streams of the Red River of the North basin.

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