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Note: Session titles beginning with an asterisk (*) have student presenters.
AUTHOR: Matthew Skoog, Anthony Rodger, Trevor Starks, and Donnie King - Oklahoma Department of Wildlife Conservation
ABSTRACT: The Oklahoma Department of Wildlife conducted a fish community assessment in the upper Red River Drainage during the summer of 2016. The objectives of this assessment were 1) to determine occupancy and the factors influencing occupancy of fish species of greatest conservation need (n= 5) and 2) to compare contemporary fish communities to historical fish collections within the drainage. Species occurrences and abiotic data were recorded at 48 sites. Each site was surveyed three times for a total of 144 collections. Single-species single-season occupancy models were used to estimate the occupancy of the fish species of greatest conservation need. Generalized linear models of multivariate species data were used to test for differences between contemporary and historical fish communities. Individual species’ contributions to observed differences between sampling periods was calculated using sum-of-likelihood ratios for each species that varied significantly between sampling periods. Occupancy probabilities and the factors driving occupancy were variable among species. Comparisons between historical and contemporary data suggest that there have been significant changes in fish communities driven by increases in generalist species and decreases in some small-bodied cyprinids. This data will be crucial for informing decision making aimed at native fish conservation in the upper Red River drainage.
Wednesday November 1, 2017 11:20am - 11:40am EDT
Jones