Amy George
Amy is a Fish Biologist at the Columbia Environmental Research Center.
Science and Products
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Genetic analysis shows that morphology alone cannot distinguish asian carp eggs from those of other cyprinid species Genetic analysis shows that morphology alone cannot distinguish asian carp eggs from those of other cyprinid species
Fish eggs and embryos (hereafter collectively referred to as “eggs”) were collected in the upper Mississippi River main stem (~300 km upstream of previously reported spawning by invasive Asian carp) during summer 2013. Based on previously published morphological characteristics, the eggs were identified as belonging to Asian carp. A subsample of the eggs was subsequently analyzed by using...
Authors
James H. Larson, S. Grace McCalla, Duane Chapman, Christopher B. Rees, Brent C. Knights, Jonathan M. Vallazza, Amy E. George, William B. Richardson, Jon Amberg
Identifying sturgeon spawning locations through back-calculations of drift Identifying sturgeon spawning locations through back-calculations of drift
Unfavorable spawning habitat conditions have been identified as a potential limiting factor for recovery of the endangered pallid sturgeon on the Missouri River and its tributaries. After successful spawning, incubation, and hatching, sturgeon free embryos passively drift downstream and are sometimes captured by sampling crews. While spawning habitat has been identified at time of...
Authors
Edward A. Bulliner, Susannah O. Erwin, Robert B. Jacobson, Kimberly A. Chojnacki, Amy E. George, Aaron J. DeLonay
Effects of sediment burial on grass carp, Ctenopharyngodon idella (Valenciennes,1844), eggs Effects of sediment burial on grass carp, Ctenopharyngodon idella (Valenciennes,1844), eggs
It is thought that grass carp (Ctenopharyngodon idella) eggs must remain suspended in the water column in order to hatch successfully. Using sand, the effects of varying sediment levels on grass carp eggs were tested at different developmental states and temperatures. Survival was high (15–35%, depending on temperature and trial) in the unburied treatment where eggs rested on a sand bed...
Authors
Amy E. George, Duane Chapman, Joseph E. Deters, Susannah O. Erwin, Cari-Ann Hayer
Embryonic and larval development and early behavior in grass carp, Ctenopharyngodon idella: implications for recruitment in rivers Embryonic and larval development and early behavior in grass carp, Ctenopharyngodon idella: implications for recruitment in rivers
With recent findings of grass carp Ctenopharyngodon idella in tributaries of the Great Lakes, information on developmental rate and larval behavior is critical to efforts to assess the potential for establishment within the tributaries of that region. In laboratory experiments, grass carp were spawned and eggs and larvae reared at two temperature treatments, one "cold" and one "warm"...
Authors
Amy E. George, Duane Chapman
Aspects of embryonic and larval development in bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix Aspects of embryonic and larval development in bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix
As bighead carp Hypophthalmichthys nobilis and silver carp H. molitrix (the bigheaded carps) are poised to enter the Laurentian Great Lakes and potentially damage the region’s economically important fishery, information on developmental rates and behaviors of carps is critical to assessing their ability to establish sustainable populations within the Great Lakes basin. In laboratory...
Authors
Amy E. George, Duane Chapman
Developmental rate and behavior of early life stages of bighead carp and silver carp Developmental rate and behavior of early life stages of bighead carp and silver carp
The early life stages of Asian carp are well described by Yi and others (1988), but since these descriptions are represented by line drawings based only on live individuals and lacked temperature controls, further information on developmental time and stages is of use to expand understanding of early life stages of these species. Bighead carp and silver carp were cultured under two...
Authors
Duane Chapman, Amy E. George
Science and Products
Filter Total Items: 18
No Result Found
Filter Total Items: 30
Genetic analysis shows that morphology alone cannot distinguish asian carp eggs from those of other cyprinid species Genetic analysis shows that morphology alone cannot distinguish asian carp eggs from those of other cyprinid species
Fish eggs and embryos (hereafter collectively referred to as “eggs”) were collected in the upper Mississippi River main stem (~300 km upstream of previously reported spawning by invasive Asian carp) during summer 2013. Based on previously published morphological characteristics, the eggs were identified as belonging to Asian carp. A subsample of the eggs was subsequently analyzed by using...
Authors
James H. Larson, S. Grace McCalla, Duane Chapman, Christopher B. Rees, Brent C. Knights, Jonathan M. Vallazza, Amy E. George, William B. Richardson, Jon Amberg
Identifying sturgeon spawning locations through back-calculations of drift Identifying sturgeon spawning locations through back-calculations of drift
Unfavorable spawning habitat conditions have been identified as a potential limiting factor for recovery of the endangered pallid sturgeon on the Missouri River and its tributaries. After successful spawning, incubation, and hatching, sturgeon free embryos passively drift downstream and are sometimes captured by sampling crews. While spawning habitat has been identified at time of...
Authors
Edward A. Bulliner, Susannah O. Erwin, Robert B. Jacobson, Kimberly A. Chojnacki, Amy E. George, Aaron J. DeLonay
Effects of sediment burial on grass carp, Ctenopharyngodon idella (Valenciennes,1844), eggs Effects of sediment burial on grass carp, Ctenopharyngodon idella (Valenciennes,1844), eggs
It is thought that grass carp (Ctenopharyngodon idella) eggs must remain suspended in the water column in order to hatch successfully. Using sand, the effects of varying sediment levels on grass carp eggs were tested at different developmental states and temperatures. Survival was high (15–35%, depending on temperature and trial) in the unburied treatment where eggs rested on a sand bed...
Authors
Amy E. George, Duane Chapman, Joseph E. Deters, Susannah O. Erwin, Cari-Ann Hayer
Embryonic and larval development and early behavior in grass carp, Ctenopharyngodon idella: implications for recruitment in rivers Embryonic and larval development and early behavior in grass carp, Ctenopharyngodon idella: implications for recruitment in rivers
With recent findings of grass carp Ctenopharyngodon idella in tributaries of the Great Lakes, information on developmental rate and larval behavior is critical to efforts to assess the potential for establishment within the tributaries of that region. In laboratory experiments, grass carp were spawned and eggs and larvae reared at two temperature treatments, one "cold" and one "warm"...
Authors
Amy E. George, Duane Chapman
Aspects of embryonic and larval development in bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix Aspects of embryonic and larval development in bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix
As bighead carp Hypophthalmichthys nobilis and silver carp H. molitrix (the bigheaded carps) are poised to enter the Laurentian Great Lakes and potentially damage the region’s economically important fishery, information on developmental rates and behaviors of carps is critical to assessing their ability to establish sustainable populations within the Great Lakes basin. In laboratory...
Authors
Amy E. George, Duane Chapman
Developmental rate and behavior of early life stages of bighead carp and silver carp Developmental rate and behavior of early life stages of bighead carp and silver carp
The early life stages of Asian carp are well described by Yi and others (1988), but since these descriptions are represented by line drawings based only on live individuals and lacked temperature controls, further information on developmental time and stages is of use to expand understanding of early life stages of these species. Bighead carp and silver carp were cultured under two...
Authors
Duane Chapman, Amy E. George