General comparisons of riverine versus impounded stations were made by averaging IBI and QHEI scores from all sampling events at a given station.
Comparison of Indices.--A general comparison of several parameters, including the number of fish species, IBI scores, QHEI scores, and individual QHEI metrics, revealed significant differences in fish community and habitat integrity in impounded versus riverine sections of the St.
indicated that constrained sites (55.1) had significantly reduced habitat quality compared to recovering sites (76.3; ANOVA P = 0.024).
Methods for assessing habitat in flowing waters: using the qualitative habitat evaluation index (QHEI
Fish abundance was best explained by total QHEI scores using canonical correspondence analysis (Table 3; Fig.
Macroinvertebrate community composition was best explained by the substrate QHEI sub-metric ([lambda] = 0.24; P = 0.005).
Habitat characteristics of sample sites were evaluated using two methods: the Qualitative Habitat Evaluation Index (QHEI) (Rankin, 1989) and visual assessment of microhabitat cover.
This a priori assumption suggested that we compare grass pickerel catch (response variable) with habitat features (predictor variables) of Indiana streams (e.g., temperature, vegetation, QHEI) where this fish was present.
A Qualitative Habitat Evaluation Index (QHEI) was also calculated for each site.
A similar analysis was performed on QHEI score and site type (Table 4; Fig.
To evaluate the relationship between habitat and fish assemblages at Killbuck Creek and Pipe Creek I applied DCA to the dual matrix of fish data and QHEI metric scores for 2008 only.
QHEI scores ranged from 26 "very poor" to 66 "fair".