Amy George
Amy is a Fish Biologist at the Columbia Environmental Research Center.
Science and Products
Filter Total Items: 15
Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume
A series of laboratory experiments were conducted to better understand the behavior of grass carp eggs and larvae in moving water in order to develop and implement new strategies for control and prediction of their dispersal and drift at early life stages. Settling velocity and density of a representative sample of eggs were estimated, and three trials of flume experiments with different...
Ontogenetic changes in swimming speed of silver carp, bighead carp, and grass carp larvae-Data 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...
Data for Comparison of Size, Terminal Fall Velocity, and Density of Bighead, Silver, and Grass Carp Eggs for use in Drift Modeling Data for Comparison of Size, Terminal Fall Velocity, and Density of Bighead, Silver, and Grass Carp Eggs for use in Drift Modeling
Invasive Asian carps established in the United States spawn in turbulent water of rivers and their eggs and early larvae develop while drifting in the current. The eggs are slightly denser than water and are held in suspension by water turbulence. The eggs are believed to perish if they settle before hatching. It is thus possible to use egg drift modeling to assess the capability of a...
Filter Total Items: 26
Use of environmental DNA to detect grass carp spawning events Use of environmental DNA to detect grass carp spawning events
The timing and location of spawning events are important data for managers seeking to control invasive grass carp populations. Ichthyoplankton tows for grass carp eggs and larvae can be used to detect spawning events; however, these samples can be highly debris-laden, and are expensive and laborious to process. An alternative method, environmental DNA (eDNA) technology, has proven...
Authors
Cari-Ann Hayer, Michael F. Bayless, Amy E. George, Nathan Thompson, Catherine A. Richter, Duane Chapman
Developmental ecomorphology of the epibranchial organ of the silver carp, Hypophthalmichthys molitrix Developmental ecomorphology of the epibranchial organ of the silver carp, Hypophthalmichthys molitrix
Silver carp regularly consume and digest particles of food as small as 5 μm. This ability drives their efficient consumption of phytoplankton and because they feed low on the food chain they have an important place in aquaculture worldwide. In North America, where they are considered invasive, silver carp deplete food resources for native species and in so doing occupy increased niche...
Authors
Karly E. Cohen, Amy E. George, Duane Chapman, John H. Chick, L. Patricia Hernandez
Physical characteristics and simulated transport of pallid sturgeon and shovelnose sturgeon eggs Physical characteristics and simulated transport of pallid sturgeon and shovelnose sturgeon eggs
The imperiled pallid sturgeon (Scaphirhynchus albus) and closely related, but more common, shovelnose sturgeon (S. platorynchus) are believed to broadcast adhesive, demersal eggs in the current and over coarse substrate in turbid rivers of the North American midcontinent. It has been hypothesized that eggs settle immediately following fertilization, but field conditions preclude direct...
Authors
Kimberly Chojnacki, Susannah O. Erwin, Amy E. George, James Candrl, Robert B. Jacobson, Aaron J. Delonay
Influence of turbulence and in-stream structures on the transport and survival of grass carp eggs and larvae at various developmental stages Influence of turbulence and in-stream structures on the transport and survival of grass carp eggs and larvae at various developmental stages
Understanding the response of grass carp to flow and turbulence regimes during early life stages is fundamental to monitoring and controlling their spread. A comprehensive set of hydrodynamic experiments was conducted with live grass carp eggs and larvae, to better understand their drifting and swimming patterns with 3 different in-stream obstructions: (1) a gravel bump, (2) a single...
Authors
Andres F. Prada, Amy E. George, Benjamin H. Stahlschmidt, P. Ryan Jackson, Duane Chapman, Rafael O. Tinoco
Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume
A series of laboratory experiments was conducted to better understand the behavior of grass carp eggs and larvae in moving water in order to develop and implement new strategies for control and prediction of their dispersal and drift at early life stages. Settling velocity and density of a representative sample of eggs were estimated, and three trials of flume experiments with different...
Authors
Andres F. Prada, Amy E. George, Benjamin H. Stahlschmidt, Duane Chapman, Rafael O. Tinoco
Ontogenetic changes in swimming speed of silver carp, bighead carp, and grass carp larvae: implications for larval dispersal Ontogenetic changes in swimming speed of silver carp, bighead carp, and grass carp larvae: implications for larval dispersal
Bighead, silver, and grass carps are invasive in the waterways of central North America, and grass carp reproduction in tributaries of the Great Lakes has now been documented. Questions about recruitment potential motivate a need for accurate models of egg and larval dispersal. Quantitative data on swimming behaviors and capabilities during early ontogeny are needed to improve these...
Authors
Amy E. George, Tatiana Garcia, Benjamin H. Stahlschmidt, Duane Chapman
Science and Products
Filter Total Items: 15
Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume
A series of laboratory experiments were conducted to better understand the behavior of grass carp eggs and larvae in moving water in order to develop and implement new strategies for control and prediction of their dispersal and drift at early life stages. Settling velocity and density of a representative sample of eggs were estimated, and three trials of flume experiments with different...
Ontogenetic changes in swimming speed of silver carp, bighead carp, and grass carp larvae-Data 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...
Data for Comparison of Size, Terminal Fall Velocity, and Density of Bighead, Silver, and Grass Carp Eggs for use in Drift Modeling Data for Comparison of Size, Terminal Fall Velocity, and Density of Bighead, Silver, and Grass Carp Eggs for use in Drift Modeling
Invasive Asian carps established in the United States spawn in turbulent water of rivers and their eggs and early larvae develop while drifting in the current. The eggs are slightly denser than water and are held in suspension by water turbulence. The eggs are believed to perish if they settle before hatching. It is thus possible to use egg drift modeling to assess the capability of a...
Filter Total Items: 26
Use of environmental DNA to detect grass carp spawning events Use of environmental DNA to detect grass carp spawning events
The timing and location of spawning events are important data for managers seeking to control invasive grass carp populations. Ichthyoplankton tows for grass carp eggs and larvae can be used to detect spawning events; however, these samples can be highly debris-laden, and are expensive and laborious to process. An alternative method, environmental DNA (eDNA) technology, has proven...
Authors
Cari-Ann Hayer, Michael F. Bayless, Amy E. George, Nathan Thompson, Catherine A. Richter, Duane Chapman
Developmental ecomorphology of the epibranchial organ of the silver carp, Hypophthalmichthys molitrix Developmental ecomorphology of the epibranchial organ of the silver carp, Hypophthalmichthys molitrix
Silver carp regularly consume and digest particles of food as small as 5 μm. This ability drives their efficient consumption of phytoplankton and because they feed low on the food chain they have an important place in aquaculture worldwide. In North America, where they are considered invasive, silver carp deplete food resources for native species and in so doing occupy increased niche...
Authors
Karly E. Cohen, Amy E. George, Duane Chapman, John H. Chick, L. Patricia Hernandez
Physical characteristics and simulated transport of pallid sturgeon and shovelnose sturgeon eggs Physical characteristics and simulated transport of pallid sturgeon and shovelnose sturgeon eggs
The imperiled pallid sturgeon (Scaphirhynchus albus) and closely related, but more common, shovelnose sturgeon (S. platorynchus) are believed to broadcast adhesive, demersal eggs in the current and over coarse substrate in turbid rivers of the North American midcontinent. It has been hypothesized that eggs settle immediately following fertilization, but field conditions preclude direct...
Authors
Kimberly Chojnacki, Susannah O. Erwin, Amy E. George, James Candrl, Robert B. Jacobson, Aaron J. Delonay
Influence of turbulence and in-stream structures on the transport and survival of grass carp eggs and larvae at various developmental stages Influence of turbulence and in-stream structures on the transport and survival of grass carp eggs and larvae at various developmental stages
Understanding the response of grass carp to flow and turbulence regimes during early life stages is fundamental to monitoring and controlling their spread. A comprehensive set of hydrodynamic experiments was conducted with live grass carp eggs and larvae, to better understand their drifting and swimming patterns with 3 different in-stream obstructions: (1) a gravel bump, (2) a single...
Authors
Andres F. Prada, Amy E. George, Benjamin H. Stahlschmidt, P. Ryan Jackson, Duane Chapman, Rafael O. Tinoco
Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume Survival and drifting patterns of grass carp eggs and larvae in response to interactions with flow and sediment in a laboratory flume
A series of laboratory experiments was conducted to better understand the behavior of grass carp eggs and larvae in moving water in order to develop and implement new strategies for control and prediction of their dispersal and drift at early life stages. Settling velocity and density of a representative sample of eggs were estimated, and three trials of flume experiments with different...
Authors
Andres F. Prada, Amy E. George, Benjamin H. Stahlschmidt, Duane Chapman, Rafael O. Tinoco
Ontogenetic changes in swimming speed of silver carp, bighead carp, and grass carp larvae: implications for larval dispersal Ontogenetic changes in swimming speed of silver carp, bighead carp, and grass carp larvae: implications for larval dispersal
Bighead, silver, and grass carps are invasive in the waterways of central North America, and grass carp reproduction in tributaries of the Great Lakes has now been documented. Questions about recruitment potential motivate a need for accurate models of egg and larval dispersal. Quantitative data on swimming behaviors and capabilities during early ontogeny are needed to improve these...
Authors
Amy E. George, Tatiana Garcia, Benjamin H. Stahlschmidt, Duane Chapman