Recruitment of Fishes in the 1xbet online casino River
Investigators:
Joe Gerken, Ph.D. student
Dr. Craig Paukert
Project Supervisor:
Dr. Craig Paukert
Funding:
1xbet online casino State University
1xbet online casino Department of Wildlife and Parks Cooperators
1xbet online casino Department of Wildlife and Parks
Status:
Completed May 2013
Location:
1xbet online casino River in eastern 1xbet online casino
Objectives:
Identify the biological and environmental factors that influence recruitment in the 1xbet online casino River.
Determine if year class strength of selected fishes is related to river flows, and if year class strength is consistent throughout the 1xbet online casino River.
Make recommendations of the conditions (flows) suitable for recruitment of large river 1xbet online casino .
Progress and Results:
River discharge influences fish and invertebrate communities and understanding how hydrologic variables contribute to fish and invertebrate composition can provide information for restoration and management. This study examines the relationship between several flow regime metrics that may influence fish and invertebrate community structure in large river systems such as the 1xbet online casino River. First, I examined how hydrology influences macroinvertebrate (drifting and benthic) density and fish communities before, during, and after flooding in both main and secondary channels. I found that drifting invertebrate density increased during flooding potentially providing increased prey opportunities for fishes. I also found that fluvial dependent and generalist fish species use inundated habitats more than fluvial specialists. My results suggest that the flux of water into inundated habitats supports a unique subset of invertebrate and fish communities of the main channel. Next, I examined the importance of lateral connectivity on fish and invertebrate composition by examining differences in seasonally and permanently inundated secondary channels in relation to main channel reaches. I found that drifting and benthic invertebrate assemblages and fish assemblages differed between seasonally inundated and permanently connected secondary channels. These results suggest that maintenance of diverse secondary channel connections is useful in preserving native biota in the 1xbet online casino River. Finally, I tested if hydrologic variables influenced recruitment of four native 1xbet online casino River fishes. I found that recruitment for two of the four fish species (flathead catfish, Pylodictis olivaris, and shovelnose sturgeon, Scaphirhynchus platorynchus) increased in high flow years. These results indicate that a natural and variable flow regime may be important for maintaining fish community structure in the 1xbet online casino River. The results of this study have implications for management strategies that include the use of high flows to provide a pulse of insect prey to the main channel for fishes, restoration of natural high and low flow variability as important to fish recruitment, and diversity in secondary channel connectivity (seasonal and permanently connected) that promotes unique fish and invertebrate communities.
Products:
Dissertation:
Gerken, J.E. Fish and invertebrate community response to flow magnitude in the 1xbet online casino River. Ph.D. Dissertation. Division of Biology, 1xbet online casino State University.
Publications:
Gerken, J., and C. Paukert. 2013. Fish community and habitat factors associated with the distribution of Topeka shiner (Notropis topeka) in 1xbet online casino streams. Journal of Freshwater Ecology 28: 503-516 DOI: 10.1080/02705060.2013.792754
White, K., J. Gerken, C. Paukert, and A. Makinster. 2010. Fish community structure in natural and engineered habitats in the 1xbet online casino River. River Research and Applications. Vol. 26, pp. 797-805
Professional Presentations:
Gerken, J., and C. Paukert. 2011. Age-specific demography of silver carp: implications for management and control. American Fisheries Society Annual Meeting, Seattle, WA.
Gerken, J., and C. Paukert. 2011. Can silver carp be controlled? Population level response to various management regimes. Midwest 1xbet online casino and Wildlife Conference, Des Moines, IA.
Gerken, J., and C. Paukert. 2011. The importance of high flows and floodplain inundation for fish and invertebrates of the 1xbet online casino River. 1xbet online casino Natural Resources Conference, Wichita, KS.
Mammoliti, K., J. Gerken, and C. Paukert. 2010. Population characteristics of channel catfish in the 1xbet online casino River. 1xbet online casino Natural Resources Conference, Wichita, KS.
Gerken, J. E., and C. P. Paukert. 2010. Fish recruitment in the 1xbet online casino River: the role of flow, habitat, and urbanization. 1xbet online casino Natural Resources Conference, Wichita, KS.
White, K., J. Gerken, C. Paukert, and A. Makinster. 2010. Fish community structure in natural and engineered habitats in the 1xbet online casino River. 1xbet online casino Natural Resources Conference, Wichita, KS.
Paukert, C. and J. Gerken. 2010. The Importance of secondary channels to mainchannel fishes in the 1xbet online casino River. Big River Confab, Jefferson City, MO.
Gerken, J., and C. Paukert. 2010. Floods and fishes: examining the role of high flows on 1xbet online casino and invertebrates in a large Great Plains River. Midwest 1xbet online casino and Wildlife Conference, St. Paul, MN.
Gerken, J., and C. Paukert. 2010. Testing the flood pulse concept: The importance of floodplain inundation on 1xbet online casino and invertebrates of a Great Plains river. American Fisheries Society Annual Meeting, Pittsburgh, PA.
Gerken, J. E., and C. P. Paukert. 2009. Effects of urbanization on recruitment of Riverine fishes. 70th Midwest 1xbet online casino and Wildlife Conference, Springfield, IL.
Gerken, J. E., and C. P. Paukert. 2009. Topeka shiners status and trends in 1xbet online casino . 70th Midwest Fish and Wildlife Conference, Springfield, IL.
Gerken, J., and C. Paukert. 2009. Spatial variation in the recruitment patterns of three riverine fishes in the 1xbet online casino River. American Fisheries Society Annual Meeting, Nashville, TN.
Gerken, J., and C. Paukert. 2009. Spatial variation in the recruitment patterns of three riverine fishes in the 1xbet online casino River. KSU Biology Student Research Forum, Manhattan, KS.
Gerken, J., W. Bouska, and C. Paukert. 2009. Effects of instream habitat and fish communities on the endangered Topeka shiner in 1xbet online casino streams. 1xbet online casino Natural Resources Conference, Wichita, KS.
Gerken, J.E., and C.P. Paukert. 2009. Impacts of a low-head dam on fish communities in the 1xbet online casino River. 1xbet online casino Natural Resources Conference, Wichita, KS.
Gerken, J.E., and C.P. Paukert. 2009. Factors impacting Topeka shiner distribution in 1xbet online casino . American Fisheries Society Midwest Student Colloquium, Annual Meeting, Ames, IA.
Gerken, J.E., and C.P. Paukert. 2009. Impacts of a low-head dam on a Great Plains River 1xbet online casino Community. American Fisheries Society Midwest Student Colloquium, Annual Meeting, Ames, IA.
Gerken, J. E., and C. P. Paukert. 2008. Fish recruitment in the 1xbet online casino River: the role of flow, habitat, and urbanization. 1xbet online casino Natural Resources Conference, Wichita, KS.
Gerken, J., and C. P. Paukert. 2008. Effects of a low-head dam on the 1xbet online casino community of a large Great Plains river. Southwestern Association of Naturalists, Memphis, TN.
Gerken, J., and C. Paukert. 2008. Effects of a low-head dam on the 1xbet online casino community of a large Great Plains River. American Fisheries Society Annual Meeting, Ottawa, Canada.
Gerken, J., and C. Paukert. 2008. 1xbet online casino community changes associated with a low-head dam in a large Great Plains river. Midwest 1xbet online casino and Wildlife Conference, Columbus, OH.
