Thesis
Establishing a sampling protocol and investigating the life history of the federally endangered Grotto Sculpin (Cottus specus) in the karst systems of Perry County, Missouri
Chowning, M.E.
Record Number:
5166
Year:
2020
Pages:
45 pages
University:
Master of Natural Science, Department of Biology in the School of Graduate Studies and Research of Southeast Missouri State University and Missouri Department of Conservation Cape Girardeau, Missouri
Abstract:
The purpose of this project was to assess three methods for sampling of Grotto Sculpin
(Cottus specus) in three cave systems in Perry County, Missouri, to effectively monitor the
population over time, and to provide an estimate of occupancy in these cave systems. The
analyses are based on research by Adams et al. (2008), Adams et al. (2013), and Fernholz and
Phelps (2016), and data collected during the summer and fall of 2017. Visual dip netting and
two seining methods were used to estimate detection probabilities, and to assess the probability
of occupancy for each cave system. The results show that detection probabilities are highest for
visual dip netting. Furthermore, probability of occupancy, when based on detection histories
rather than naïve detection probabilities, showed that both Tom Moore and Mystery Caves were
fully occupied by Grotto Sculpin. However, Running Bull Cave had a probability of occupancy
of only 73%. These results were used to estimate sculpin abundance in each cave. The data
supports the notion that visual dip netting provided the highest detection probabilities, while
effectively minimalizing disturbance to these systems and significantly cutting down on
necessary gear for researchers to transport through the caves. This suggests it is possible to
minimize effort and gear, while reducing risk to researchers and cave ecosystems. Future
monitoring of Grotto Sculpin using this sampling and statistical protocol will enable relatively
efficient monitoring of Grotto Sculpin populations.
Times Cited:
1
Relevent Species: