| population biology of allocreadium lobatum wallin, 1909 (digenea: allocreadiidae) in the creek chub, semotilus atromaculatus, mitchill (osteichthyes: cyprinadae), in a nebraska creek, usa. | allocreadium lobatum wallin, 1909 has been reported in cyprinid species of freshwater fish in canada and in the united states. the population biology of a. lobatum in the host semotilus atromaculatus mitchill was studied from may through december 1991, in a usa creek. overall prevalence (64%) and mean intensity (4.4 +/- 0.4) were greater than previously reported while abundance, reported for the first time, was 2.8 +/- 0.3. several trends in a. lobatum population biology as a function of s. atro ... | 2001 | 11313639 |
| spatial heterogeneity in the parasite communities of creek chub (semotilus atromaculatus) in southeastern nebraska. | the intestinal helminth communities of creek chub (semotilus atromaculatus) were studied in the streams of southeastern nebraska to characterize spatial variation, to determine whether drainages act as regional species pools, and to examine the spatial patterning of individual parasite species within and among drainages. creek chub were sampled in the summer of 2003 and the spring of 2004 at each of 12 sites distributed evenly among 3 drainages in the big nemaha river watershed. four intestinal ... | 2006 | 16729677 |
| systematic position and relationships of paracreptotrematina limi, based on partial sequences of 28s rrna and cytochrome c oxidase subunit 1 genes. | paracreptotrematina limi amin and myer, 1982 (trematoda), an intestinal fluke specific to the mudminnow, umbra limi, is conventionally classified within the papillose allocreadiidae. its unusual morphology (lack of identifiable vitellaria, large fully embryonated terminal eggs), assumptions of homology of its 2 atypical muscular oral 'papillae' (lobes) with those of the bunoderinae, and its unknown life cycle make this classification tenuous. previous phylogenetic analyses of the papillose alloc ... | 2006 | 16729708 |