James Candrl
James is a Fish Biologist at the Columbia Environmental Research Center.
Since joining the USGS in 2000, James has devoted his career to culturing and spawning many species of fresh water and salt water fish for support of scientific research purposes with extensive experience propagating various sturgeon species. His research focuses on natural and artificial spawning techniques along with early life stage care and feeding. Additionally, his experience as the biosecurity coordinator for the CERC has led to an increased knowledge of culture techniques, harvesting and transportation of organisms on a national and international level.
Professional Experience
2005-present Fish Biologist, USGS Columbia Environmental Research Center
2000-2005 Contract Biologist, USGS Columbia Environmental Research Center
1997-2000 Production Manager, Sunflower Aquaculture LLC
Education and Certifications
B.S. in Biology, University of Central Missouri, 1994
Science and Products
Developmental stage and length of Pallid Sturgeon and Shovelnose Sturgeon free embryos reared at a constant temperature
This dataset documents the length and developmental stage of pallid sturgeon and shovelnose sturgeon free embryos from the time of hatch through melanin plug expulsion (the approximate onset of exogenous feeding) reared in the laboratory at a constant temperature. Free embryos from 4 pallid sturgeon crosses and 7 shovelnose sturgeon crosses were reared separately in the laboratory at a mean temper
Ontogenetic development of pallid sturgeon (Scaphirhynchus albus) and shovelnose sturgeon (Scaphirhynchus platorynchus) from hatch through yolk absorption
Sturgeons have a complex free-embryo period extending from hatch to the initiation of exogenous feeding. Although available for some sturgeon species of the genus Acipenser, descriptions of the developmental stages of free embryos of the genus Scaphirhynchus are lacking. We characterised the ontogenetic development of pallid sturgeon (Scaphirhynchus albus) and shovelnose sturgeon (S. platorynchus)
Authors
Kimberly Chojnacki, Marlene J Dodson, Amy E. George, James Candrl, Aaron J. Delonay
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 observation.
Authors
Kimberly Chojnacki, Susannah O. Erwin, Amy E. George, James Candrl, Robert B. Jacobson, Aaron J. Delonay
Sensitivity of lake sturgeon (Acipenser fulvescens) early life stages to 2,3,7,8-tetrachlorodibenzo-P-dioxin and 3,3′,4,4′,5-pentachlorobiphenyl
The aquatic food web of the Great Lakes has been contaminated with polychlorinated biphenyls (PCBs) since the mid-20th century. Threats of PCB exposures to long-lived species of fish, such as lake sturgeon (Acipenser fulvescens), have been uncertain because of a lack of information on the relative sensitivity of the species. The objective of the present study was to evaluate the sensitivity of ear
Authors
Donald E. Tillitt, Justin A. Buckler, Diane Nicks, James Candrl, Rachel Claunch, Robert W. Gale, Holly J. Puglis, Edward E. Little, Tiffany L. Linbo, Mary Baker
Ecological requirements for pallid sturgeon reproduction and recruitment in the Missouri River—Annual report 2014
The Comprehensive Sturgeon Research Project is a multiyear, multiagency collaborative research framework developed to provide information to support pallid sturgeon recovery and Missouri River management decisions. The project strategy integrates field and laboratory studies of sturgeon reproductive ecology, early life history, habitat requirements, and physiology. The project scope of work is dev
Authors
Aaron J. Delonay, Kimberly A. Chojnacki, Robert B. Jacobson, Patrick J. Braaten, Kevin J. Buhl, Caroline M. Elliott, Susannah O. Erwin, Jacob D.A. Faulkner, James S. Candrl, David B. Fuller, Kenneth M. Backes, Tyler M. Haddix, Matthew L. Rugg, Christopher J. Wesolek, Brandon L. Eder, Gerald E. Mestl
Sensitivity of shovelnose sturgeon (Scaphirhynchus platorynchus) and pallid sturgeon (S. albus) early life stages to 3,30,4,40,5-pentachlorobiphenyl and 2,3,7,8-tetrachlorodibenzo-p-dioxin exposure
Concern exists that polychlorinated biphenyls (PCBs) may be contributing to the current decline of shovelnose sturgeon (Scaphirhynchus platorynchus) and the US federally endangered pallid sturgeon (Scaphirhynchus albus). Waterborne exposures with newly fertilized eggs were used to assess developmental and morphological effects of 2 of the most potent aryl hydrocarbon receptor (AhR) agonists, 3,3′,
Authors
Justin Buckler, James S. Candrl, Michael J. McKee, Diana M. Papoulias, Donald E. Tillitt, David L. Galat
Verification of ploidy and reproductive potential in triploid black carp and grass carp
No abstract available
Authors
Diana M. Papoulias, James S. Candrl, Jill A. Jenkins, Donald E. Tillitt
A minimally invasive method for extraction of sturgeon oocytes
Fishery biologists, hatchery personnel, and caviar fishers routinely extract oocytes from sturgeon (Acipenseridae) to determine the stage of maturation by checking egg quality. Typically, oocytes are removed either by inserting a catheter into the oviduct or by making an incision in the body cavity. Both methods can be time-consuming and stressful to the fish. We describe a device to collect matur
Authors
James S. Candrl, Diana M. Papoulias, Donald E. Tillitt
Science and Products
Developmental stage and length of Pallid Sturgeon and Shovelnose Sturgeon free embryos reared at a constant temperature
This dataset documents the length and developmental stage of pallid sturgeon and shovelnose sturgeon free embryos from the time of hatch through melanin plug expulsion (the approximate onset of exogenous feeding) reared in the laboratory at a constant temperature. Free embryos from 4 pallid sturgeon crosses and 7 shovelnose sturgeon crosses were reared separately in the laboratory at a mean temper
Ontogenetic development of pallid sturgeon (Scaphirhynchus albus) and shovelnose sturgeon (Scaphirhynchus platorynchus) from hatch through yolk absorption
Sturgeons have a complex free-embryo period extending from hatch to the initiation of exogenous feeding. Although available for some sturgeon species of the genus Acipenser, descriptions of the developmental stages of free embryos of the genus Scaphirhynchus are lacking. We characterised the ontogenetic development of pallid sturgeon (Scaphirhynchus albus) and shovelnose sturgeon (S. platorynchus)
Authors
Kimberly Chojnacki, Marlene J Dodson, Amy E. George, James Candrl, Aaron J. Delonay
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 observation.
Authors
Kimberly Chojnacki, Susannah O. Erwin, Amy E. George, James Candrl, Robert B. Jacobson, Aaron J. Delonay
Sensitivity of lake sturgeon (Acipenser fulvescens) early life stages to 2,3,7,8-tetrachlorodibenzo-P-dioxin and 3,3′,4,4′,5-pentachlorobiphenyl
The aquatic food web of the Great Lakes has been contaminated with polychlorinated biphenyls (PCBs) since the mid-20th century. Threats of PCB exposures to long-lived species of fish, such as lake sturgeon (Acipenser fulvescens), have been uncertain because of a lack of information on the relative sensitivity of the species. The objective of the present study was to evaluate the sensitivity of ear
Authors
Donald E. Tillitt, Justin A. Buckler, Diane Nicks, James Candrl, Rachel Claunch, Robert W. Gale, Holly J. Puglis, Edward E. Little, Tiffany L. Linbo, Mary Baker
Ecological requirements for pallid sturgeon reproduction and recruitment in the Missouri River—Annual report 2014
The Comprehensive Sturgeon Research Project is a multiyear, multiagency collaborative research framework developed to provide information to support pallid sturgeon recovery and Missouri River management decisions. The project strategy integrates field and laboratory studies of sturgeon reproductive ecology, early life history, habitat requirements, and physiology. The project scope of work is dev
Authors
Aaron J. Delonay, Kimberly A. Chojnacki, Robert B. Jacobson, Patrick J. Braaten, Kevin J. Buhl, Caroline M. Elliott, Susannah O. Erwin, Jacob D.A. Faulkner, James S. Candrl, David B. Fuller, Kenneth M. Backes, Tyler M. Haddix, Matthew L. Rugg, Christopher J. Wesolek, Brandon L. Eder, Gerald E. Mestl
Sensitivity of shovelnose sturgeon (Scaphirhynchus platorynchus) and pallid sturgeon (S. albus) early life stages to 3,30,4,40,5-pentachlorobiphenyl and 2,3,7,8-tetrachlorodibenzo-p-dioxin exposure
Concern exists that polychlorinated biphenyls (PCBs) may be contributing to the current decline of shovelnose sturgeon (Scaphirhynchus platorynchus) and the US federally endangered pallid sturgeon (Scaphirhynchus albus). Waterborne exposures with newly fertilized eggs were used to assess developmental and morphological effects of 2 of the most potent aryl hydrocarbon receptor (AhR) agonists, 3,3′,
Authors
Justin Buckler, James S. Candrl, Michael J. McKee, Diana M. Papoulias, Donald E. Tillitt, David L. Galat
Verification of ploidy and reproductive potential in triploid black carp and grass carp
No abstract available
Authors
Diana M. Papoulias, James S. Candrl, Jill A. Jenkins, Donald E. Tillitt
A minimally invasive method for extraction of sturgeon oocytes
Fishery biologists, hatchery personnel, and caviar fishers routinely extract oocytes from sturgeon (Acipenseridae) to determine the stage of maturation by checking egg quality. Typically, oocytes are removed either by inserting a catheter into the oviduct or by making an incision in the body cavity. Both methods can be time-consuming and stressful to the fish. We describe a device to collect matur
Authors
James S. Candrl, Diana M. Papoulias, Donald E. Tillitt