| the origin of phoxinus eos-neogaeus unisexual hybrids. | phoxinus eos-neogaeus unisexual hybrids (cyprinidae, pisces) are among the few vertebrate taxa known to reproduce clonally by gynogenesis. these taxa have a broad distribution in north america, mostly located in regions previously covered by the last pleistocene ice sheet. to assess whether asexual hybrids dispersed from glacial refuges at the end of the pleistocene or they originated from current hybridization events, genetic diversity of mitochondrial dna (mtdna) sequences and microsatellite l ... | 2007 | 17892466 |
| new species of gyrodactylus and dactylogyrus (trematoda: monogenea) from fishes of nebraska. | six new monogenetic trematodes are described from nebraska fishes: gyrodactylus bulbacanthus sp. n. from fundulus kansae (garman); g. callawayensis sp. n. from notropis lutrensis (baird and girard); g. eos sp. n. from phoxinus eos (cope); g. nebraskensis from phoxinus neogaeus (cope); g. planensis from notropis dorsalis (agassiz); and dactylogyrus pectenatus from pimephales promelas (rafinesque). this is the second report of monogeneans from nebraska fishes. | 1977 | 915609 |
| ground water sustenance of nebraska's unique sand hills peatland fen ecosystems. | many ecosystems have evolved under conditions where ground water is critical to the survival of the unique species contained therein. one example is nebraska's sand hills fens. the sand hills region comprises lush interdunal valleys amid grass-stabilized dunes. one valley type, fens, are ground water-fed wetlands that have several meters of saturated, organic soils comprising peat formed under anaerobic conditions where plant growth exceeds decomposition. these fens support unique flora and faun ... | 2013 | 17335486 |