Filters: Tags: larval fish (X) > partyWithName: U.S. Geological Survey - ScienceBase (X)

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Larval and Young of Year Walleye Diets in Western Lake Erie during 2014 and 2019 Lake Erie walleye (Stizostedion vitreum) recruitment fluctuates annually and depends partially on their diet and growth during their first year of life. To determine how age-0 walleye have responded to changes in prey species and abundance, larval and young of year walleye were collected from western Lake Erie in 2019 and 2014. Larval and young of year fish stomachs were extracted and dissected, with prey contents removed for later identification. All prey contents were identified to the lowest possible taxonomic level using a dissecting microscope and counted, with up to 20 prey items from each taxa per fish measured (0.01 mm) using a digital computer image analysis system. Zooplankton prey items were identified... Categories: Data; Tags: Aquatic Biology, Aquatic invasive species, Diets, Ecology, Fish, All tags... Great Lakes, Lake Erie, Larval fish, Limnology, Sander vitreus, Stizostedion vitreum, USGS Science Data Catalog (SDC), Walleye, Western Lake Erie, Young of year, aquatic biology, biota, ecology, environment, fish, food consumption, imageryBaseMapsEarthCover, zooplankton, Fewer tags Ontogenetic changes in swimming speed of silver carp, bighead carp, and grass carp larvae-Data We measured ontogenetic changes in routine and maximum swimming speeds of bighead, grass, and silver carp larvae. Daily measurements of routine swimming speed were taken for two weeks post-hatch using a still camera and the LARVEL program, a custom image-analysis software. Larval swimming speed was calculated using larval locations in subsequent image frames and time between images. Using an endurance chamber, we determined the maximum swimming speed of larvae (post gas bladder inflation) for four to eight weeks post-hatch. Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Asian Carp, Behavior, Biota, City of Columbia, Columbia, All tags... Early life history, Fish, Invasive species, Larval drift, Larval fish, USGS Science Data Catalog (SDC), Fewer tags Larval lake whitefish diets in western Lake Erie during 2018, 2019, and 2021 Recent declines in Lake Whitefish population abundance has prompted research to identify underlying mechanisms controlling survival of early life stages in the Great Lakes. In Lake Erie, the recruitment bottleneck window determining year class strength of Lake Whitefish occurs during the first growing season, suggesting that availability of prey could be controlling year class strength. Therefore, spatial and seasonal larval Lake Whitefish distribution, diet, and environmental zooplankton (potential prey) were collected to evaluate larval Lake Whitefish diets at 31 locations in the western basin during 2017, 2018, and 2021. We removed gut tracks of larval lake whitefish and identified diet items to lowest possible... Categories: Data; Tags: Aquatic Biology, Coregonus clupeaformis, Ecology, Fish, Great Lakes, All tags... Lake Erie, Lake Whitefish, Limnology, USGS Science Data Catalog (SDC), Western Lake Erie, aquatic biology, biota, diets, ecology, environment, fish, food consumption, inlandWaters, larval fish, zooplankton, Fewer tags Evidence of Asian carp spawning above a key choke point in the Mississippi River: Data Bighead Carp, Silver Carp and Grass Carp (collectively Asian carp) were introduced to North America in the 1960s and 70s and have established in the lower Mississippi River basin. Previously published evidence for spawning of these species has been limited in the upper Mississippi River to just below Dam 22 (near Saverton, MO). In 2013 and 2014, we sampled ichthyoplankton at 18 locations in the main stem of the upper Mississippi River from Dam 9 through Dam 19 and in four tributary rivers that empty into the Mississippi River (Des Moines, Skunk, Iowa and Wisconsin Rivers). We identified eggs and larvae using morphological techniques and then used genetic tools to confirm species identity. The spawning events we... Categories: Data; Types: Citation; Tags: Asian carp, Minnesota, Mississippi River, USGS Science Data Catalog (SDC), Upper Mississippi River, All tags... Wisconsin, biological invasion, fish eggs, invasive species, larval fish, Fewer tags Genetic species identification of larval Coregonines from Chaumont Bay (New York), Lake Ontario Location, occurrence, collection information, and genetic species identification data in support of an analysis of the spatial separation of Lake Whitefish and Cisco larvae in Chaumont Bay, Lake Ontario, the last known spawning area of both species in American waters of Lake Ontario. Genetic species identification of larval coregonines collected between April 2004 and 2015 is provided for larval samples collected from nearshore and offshore areas. Categories: Data; Tags: Aquatic Biology, Chaumont Bay, Coregonines, Ecology, Genetics, All tags... Great Lakes, Lake Ontario, Larval fish, Nursery Habitat, USGS Science Data Catalog (SDC), biota, Fewer tags