Filters: Tags: Navigation pool 19 (X) > partyWithName: Brent C Knights (X)

Filters Date Range Past year (1) Past month (1) Past week (0) Past day (0) Custom range... To   Search Contacts Upper Midwest Environmental Sciences Center James H Larson U.S. Geological Survey - ScienceBase Ecosystems Jon M Vallazza More... Categories Data (2) Tag Types Theme (2) Place (2) Harvest Set (2) USGS Scientific Topic Keyword (1) Tag Schemes None (2) Common geographic areas (1) ISO 19115 Topic Category (2) Alexandria Digital Library Feature Type Thesaurus (1) USGS Thesaurus (1) View Results as: JSON ATOM CSV

Influence of a high head dam as a dispersal barrier to fish community structure of the Upper Mississippi River: Data In 2013 and 2014, standardized electrofishing was conducted above and below Lock and Dam 19 (i.e., in Pools 19 and 20 respectively) of the Upper Mississippi River (UMR). Sampling was consistent with the UMR Restoration program’s Long Term Resource Monitoring element (LTRM) and The Illinois Natural History Survey’s Long Term Electrofishing program (LTEF) allowing for standardized comparisons among the reaches we sampled and those sampled by the LTRM (Pools 4, 8, 13, and 26) and LTEF (Pools 16-21, and Pool 25). Data in this file is includes A) new data from Pools 19 and 20 and B) data compiled from public sources for other pools (LTRM and LTEF). Generally, data codes are intended to match formatting conventions from... Categories: Data; Tags: Illinois, Impoundments, Missouri, Navigation Pool 19, USGS Science Data Catalog (SDC), All tags... Upper Mississippi, biota, community ecology, fish community, fish community composition, fisheries, Fewer tags Otolith microchemistry and microstructure of age-0 silver carp for determining early-life environments and spawning periodicity in the Upper Mississippi River in 2016 In 2016, for the first time, an abundance of age-0 silver carp (Hypophthalmichthys molitrix) were captured at several sites upstream of Lock and Dam 19 on the Upper Mississippi River near Keokuk, Iowa. These data were collected in an attempt to determine the early life environments and frequency and timing of the reproductive events that led to a large year class of age-0 silver carp. This information is important for informing decisions about control measures. We sampled these fish to determine age (days) and early life environments using their otoliths. Sampled age-0 silver carp were collected from navigation Pools 18 and 19 from July–October 2016 using a variety of sampling gears. We aged these fish by counting... Categories: Data; Tags: Aquatic Biology, Asian carp, Ecology, Hypophthalmichthys molitrix, Navigation pool 18, All tags... Navigation pool 19, Silver carp, USGS Science Data Catalog (SDC), Upper Mississippi River, biota, invasive carp, otolith microchemistry, otolith stable isotope, recruitment, Fewer tags