Aaron DeLonay
Aaron is an Ecologist at the Columbia Environmental Research Center.
Science and Products
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Ecological Requirements for Pallid Sturgeon Reproduction and Recruitment in the Lower Missouri River: A Research Synthesis 2005-08
This report provides a synthesis of results obtained between 2005 and 2008 from the Comprehensive Sturgeon Research Program, an interagency collaboration between the U.S. Geological Survey, Nebraska Game and Parks Commission, U.S. Fish and Wildlife Service, and the U.S. Army Corps of Engineers' Missouri River Recovery - Integrated Science Program. The goal of the Comprehensive Sturgeon Research Pr
Authors
Aaron J. DeLonay, Robert B. Jacobson, Diana M. Papoulias, Darin G. Simpkins, Mark L. Wildhaber, Joanna M. Reuter, Tom W. Bonnot, Kimberly A. Chojnacki, Carl E. Korschgen, Gerald E. Mestl, Michael J. Mac
Assessment of Lower Missouri River physical aquatic habitat and its use by adult sturgeon (Genus Scaphirhynchus), 2005-07
This report presents an exploratory analysis of habitat availability and use by adult Scaphirhynchus sturgeon on the Lower Missouri River from Gavins Point Dam, South Dakota, to the junction with the Mississippi River. The analysis is based on two main data sources collected from 2005 to 2007: (1) a compilation of 153 reach-scale habitat maps (mean reach length, 2.4 kilometers) derived from boat-c
Authors
Joanna M. Reuter, Robert B. Jacobson, Caroline M. Elliott, Aaron J. DeLonay
Hierarchical Bayesian Markov switching models with application to predicting spawning success of shovelnose sturgeon
The timing of spawning in fish is tightly linked to environmental factors; however, these factors are not very well understood for many species. Specifically, little information is available to guide recruitment efforts for endangered species such as the sturgeon. Therefore, we propose a Bayesian hierarchical model for predicting the success of spawning of the shovelnose sturgeon which uses both b
Authors
S. H. Holan, G. M. Davis, M. L. Wildhaber, A. J. DeLonay, D. M. Papoulias
Hydraulic and substrate maps of reaches used by sturgeon (Genus Scaphirhynchus) in the Lower Missouri River, 2005-07
This report is a repository of reach-scale maps of hydraulic and substrate characteristics generated for the habitat-use portion of an interdisciplinary sturgeon research project on the Lower Missouri River (from Gavins Point Dam to the junction with the Mississippi River). The maps were derived from hydroacoustic data sets that were collected for the purpose of assessing physical aquatic habitat
Authors
Joanna M. Reuter, Robert B. Jacobson, Caroline M. Elliott, Harold E. Johnson, Aaron J. DeLonay
Estimation of gonad volume, fecundity, and reproductive stage of shovelnose sturgeon using sonography and endoscopy with application to the endangered pallid sturgeon
Most species of sturgeon are declining in the Mississippi River Basin of North America including pallid (Scaphirhynchus albus F. and R.) and shovelnose sturgeons (S. platorynchus R.). Understanding the reproductive cycle of sturgeon in the Mississippi River Basin is important in evaluating the status and viability of sturgeon populations. We used non-invasive, non-lethal methods for examining inte
Authors
J.L. Bryan, M. L. Wildhaber, D. M. Papoulias, A. J. DeLonay, D. E. Tillitt, M.L. Annis
A conceptual life-history model for pallid and shovelnose sturgeon
Intensive management of the Missouri and Mississippi Rivers has resulted in dramatic physical changes to these rivers. These changes have been implicated as causative agents in the decline of pallid sturgeon. The pallid sturgeon, federally listed as endangered, is endemic to the turbid waters of the Missouri River and the Lower Mississippi River. The sympatric shovelnose sturgeon historically was
Authors
Mark L. Wildhaber, Aaron J. DeLonay, Diana M. Papoulias, David L. Galat, Robert B. Jacobson, Darin G. Simpkins, P. J. Braaten, Carl E. Korschgen, Michael J. Mac
Reproductive physiology of Missouri River gravid pallid sturgeon and shovelnose sturgeon during the 2005 and 2006 spawning seasons: Chapter C in Factors affecting the reproduction, recruitment, habitat, and population dynamics of pallid sturgeon and shove
In a natural, unaltered river, the location and timing of sturgeon spawning will be dictated by the prevailing environmental conditions to which the sturgeon have adapted. A goal of the Comprehensive Sturgeon Research Program (CSRP; see chap. A) at the U.S. Geological Survey Columbia Environmental Research Center is to identify where, when, and under what conditions shovelnose sturgeon (Scaphirhyn
Authors
Diana M. Papoulias, Mandy L. Annis, Aaron J. Delonay, Donald E. Tillitt
Physical and hormonal examination of Missouri River shovelnose sturgeon reproductive stage: A reference guide
From May 2001 to June 2002 Wildhaber et al. (2005) conducted monthly sampling of Lower Missouri River shovelnose sturgeon (Scaphirhynchus platorynchus) to develop methods for determination of sex and the reproductive stage of sturgeons in the field. Shovelnose sturgeon were collected from the Missouri River and ultrasonic and endoscopic imagery and blood and gonadal tissue samples were taken. The
Authors
M. L. Wildhaber, D. M. Papoulias, A. J. DeLonay, D. E. Tillitt, J.L. Bryan, M.L. Annis
Use of behavioral and physiological indicators to evaluate Scaphirhynchus sturgeon spawning success
Thirty gravid, female shovelnose sturgeon (Scaphirhynchus platorynchus) were captured in the Lower Missouri River in March 2004 to evaluate the effectiveness of physiology, telemetry and remote sensor technology coupled with change point analysis in identifying when and where Scaphirhynchus sturgeon spawn. Captured sturgeons were instrumented with ultrasonic transmitters and with archival data sto
Authors
A. J. DeLonay, D. M. Papoulias, M. L. Wildhaber, M.L. Annis, J.L. Bryan, S.A. Griffith, S. H. Holan, D. E. Tillitt
Hydroecological modeling of the Lower Missouri River
No abstract avaikable
Authors
H.E. Johnson, R. B. Jacobson, A. J. DeLonay
Gender identification of shovelnose sturgeon using ultrasonic and endoscopic imagery and the application of the method to the pallid sturgeon
Monthly sampling of shovelnose sturgeon Scaphirhynchus platorynchus, a biological surrogate for the endangered pallid sturgeon Scaphirhynchus albus, was conducted to develop a multiseasonal profile of reproductive stages. Data collected included histological characteristics of gonads from wild caught fish and laboratory and field ultrasonic and endoscopic images. These data were used to compare ef
Authors
M. L. Wildhaber, D. M. Papoulias, A. J. DeLonay, D. E. Tillitt, J.L. Bryan, M.L. Annis, J.A. Allert
Age estimation for shovelnose sturgeon: A cautionary note based on annulus formation in pectoral fin rays
Numerous studies have examined the age and growth of shovelnose sturgeon Scaphirhynchus platorynchus, but only one study attempted to validate age estimation techniques. Therefore, our objective was to use marginal increment analysis to validate annulus formation in pectoral fin rays of shovelnose sturgeon collected from the Missouri River. We also compared the precision of age estimates between t
Authors
K.W. Whiteman, V.H. Travnichek, M. L. Wildhaber, A. DeLonay, D. Papoulias, D. Tillett
Science and Products
Filter Total Items: 42
No results found.
Filter Total Items: 50
Ecological Requirements for Pallid Sturgeon Reproduction and Recruitment in the Lower Missouri River: A Research Synthesis 2005-08
This report provides a synthesis of results obtained between 2005 and 2008 from the Comprehensive Sturgeon Research Program, an interagency collaboration between the U.S. Geological Survey, Nebraska Game and Parks Commission, U.S. Fish and Wildlife Service, and the U.S. Army Corps of Engineers' Missouri River Recovery - Integrated Science Program. The goal of the Comprehensive Sturgeon Research Pr
Authors
Aaron J. DeLonay, Robert B. Jacobson, Diana M. Papoulias, Darin G. Simpkins, Mark L. Wildhaber, Joanna M. Reuter, Tom W. Bonnot, Kimberly A. Chojnacki, Carl E. Korschgen, Gerald E. Mestl, Michael J. Mac
Assessment of Lower Missouri River physical aquatic habitat and its use by adult sturgeon (Genus Scaphirhynchus), 2005-07
This report presents an exploratory analysis of habitat availability and use by adult Scaphirhynchus sturgeon on the Lower Missouri River from Gavins Point Dam, South Dakota, to the junction with the Mississippi River. The analysis is based on two main data sources collected from 2005 to 2007: (1) a compilation of 153 reach-scale habitat maps (mean reach length, 2.4 kilometers) derived from boat-c
Authors
Joanna M. Reuter, Robert B. Jacobson, Caroline M. Elliott, Aaron J. DeLonay
Hierarchical Bayesian Markov switching models with application to predicting spawning success of shovelnose sturgeon
The timing of spawning in fish is tightly linked to environmental factors; however, these factors are not very well understood for many species. Specifically, little information is available to guide recruitment efforts for endangered species such as the sturgeon. Therefore, we propose a Bayesian hierarchical model for predicting the success of spawning of the shovelnose sturgeon which uses both b
Authors
S. H. Holan, G. M. Davis, M. L. Wildhaber, A. J. DeLonay, D. M. Papoulias
Hydraulic and substrate maps of reaches used by sturgeon (Genus Scaphirhynchus) in the Lower Missouri River, 2005-07
This report is a repository of reach-scale maps of hydraulic and substrate characteristics generated for the habitat-use portion of an interdisciplinary sturgeon research project on the Lower Missouri River (from Gavins Point Dam to the junction with the Mississippi River). The maps were derived from hydroacoustic data sets that were collected for the purpose of assessing physical aquatic habitat
Authors
Joanna M. Reuter, Robert B. Jacobson, Caroline M. Elliott, Harold E. Johnson, Aaron J. DeLonay
Estimation of gonad volume, fecundity, and reproductive stage of shovelnose sturgeon using sonography and endoscopy with application to the endangered pallid sturgeon
Most species of sturgeon are declining in the Mississippi River Basin of North America including pallid (Scaphirhynchus albus F. and R.) and shovelnose sturgeons (S. platorynchus R.). Understanding the reproductive cycle of sturgeon in the Mississippi River Basin is important in evaluating the status and viability of sturgeon populations. We used non-invasive, non-lethal methods for examining inte
Authors
J.L. Bryan, M. L. Wildhaber, D. M. Papoulias, A. J. DeLonay, D. E. Tillitt, M.L. Annis
A conceptual life-history model for pallid and shovelnose sturgeon
Intensive management of the Missouri and Mississippi Rivers has resulted in dramatic physical changes to these rivers. These changes have been implicated as causative agents in the decline of pallid sturgeon. The pallid sturgeon, federally listed as endangered, is endemic to the turbid waters of the Missouri River and the Lower Mississippi River. The sympatric shovelnose sturgeon historically was
Authors
Mark L. Wildhaber, Aaron J. DeLonay, Diana M. Papoulias, David L. Galat, Robert B. Jacobson, Darin G. Simpkins, P. J. Braaten, Carl E. Korschgen, Michael J. Mac
Reproductive physiology of Missouri River gravid pallid sturgeon and shovelnose sturgeon during the 2005 and 2006 spawning seasons: Chapter C in Factors affecting the reproduction, recruitment, habitat, and population dynamics of pallid sturgeon and shove
In a natural, unaltered river, the location and timing of sturgeon spawning will be dictated by the prevailing environmental conditions to which the sturgeon have adapted. A goal of the Comprehensive Sturgeon Research Program (CSRP; see chap. A) at the U.S. Geological Survey Columbia Environmental Research Center is to identify where, when, and under what conditions shovelnose sturgeon (Scaphirhyn
Authors
Diana M. Papoulias, Mandy L. Annis, Aaron J. Delonay, Donald E. Tillitt
Physical and hormonal examination of Missouri River shovelnose sturgeon reproductive stage: A reference guide
From May 2001 to June 2002 Wildhaber et al. (2005) conducted monthly sampling of Lower Missouri River shovelnose sturgeon (Scaphirhynchus platorynchus) to develop methods for determination of sex and the reproductive stage of sturgeons in the field. Shovelnose sturgeon were collected from the Missouri River and ultrasonic and endoscopic imagery and blood and gonadal tissue samples were taken. The
Authors
M. L. Wildhaber, D. M. Papoulias, A. J. DeLonay, D. E. Tillitt, J.L. Bryan, M.L. Annis
Use of behavioral and physiological indicators to evaluate Scaphirhynchus sturgeon spawning success
Thirty gravid, female shovelnose sturgeon (Scaphirhynchus platorynchus) were captured in the Lower Missouri River in March 2004 to evaluate the effectiveness of physiology, telemetry and remote sensor technology coupled with change point analysis in identifying when and where Scaphirhynchus sturgeon spawn. Captured sturgeons were instrumented with ultrasonic transmitters and with archival data sto
Authors
A. J. DeLonay, D. M. Papoulias, M. L. Wildhaber, M.L. Annis, J.L. Bryan, S.A. Griffith, S. H. Holan, D. E. Tillitt
Hydroecological modeling of the Lower Missouri River
No abstract avaikable
Authors
H.E. Johnson, R. B. Jacobson, A. J. DeLonay
Gender identification of shovelnose sturgeon using ultrasonic and endoscopic imagery and the application of the method to the pallid sturgeon
Monthly sampling of shovelnose sturgeon Scaphirhynchus platorynchus, a biological surrogate for the endangered pallid sturgeon Scaphirhynchus albus, was conducted to develop a multiseasonal profile of reproductive stages. Data collected included histological characteristics of gonads from wild caught fish and laboratory and field ultrasonic and endoscopic images. These data were used to compare ef
Authors
M. L. Wildhaber, D. M. Papoulias, A. J. DeLonay, D. E. Tillitt, J.L. Bryan, M.L. Annis, J.A. Allert
Age estimation for shovelnose sturgeon: A cautionary note based on annulus formation in pectoral fin rays
Numerous studies have examined the age and growth of shovelnose sturgeon Scaphirhynchus platorynchus, but only one study attempted to validate age estimation techniques. Therefore, our objective was to use marginal increment analysis to validate annulus formation in pectoral fin rays of shovelnose sturgeon collected from the Missouri River. We also compared the precision of age estimates between t
Authors
K.W. Whiteman, V.H. Travnichek, M. L. Wildhaber, A. DeLonay, D. Papoulias, D. Tillett