Spawning related movement of shovelnose sturgeon in the Missouri River above Fort Peck Reservoir, Montana
Journal of Applied Ichthyology
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Abstract
The hypotheses of this study were (i) that shovelnose sturgeon would make upstream movements to spawn, (ii) movement of spawning fish would be greater in a year with higher discharge, and (iii) that spawning fish would have greater movements than reproductively inactive fish. Shovelnose sturgeon Scaphirhynchus platorynchus (Rafinesque, 1820) in five reproductive categories (e.g. males, confirmed spawning females, potentially spawning females, atretic females, and reproductively inactive females) were tracked in 2008 and 2009. All reproductive categories, except reproductively inactive females, exhibited large-scale movements and had omnidirectional movements. No differences in movement rates were observed in confirmed spawning females between years despite a 45% higher peak discharge in 2008 (839 m3 s−1) than in 2009 (578 m3 s−1). A peak discharge was obtained at a faster rate in 2008 (165 m3 s−1 day−1) than in 2009 (39 m3 s−1 day−1), and high discharge was of greater duration in 2008. Reproductively inactive females did not exhibit large-scale movements and their movement rate differed from other reproductive categories. Shovelnose sturgeon spawned in both years, despite highly varying hydrographs between years.
Suggested Citation
Richards, R.R., Guy, C.S., Webb, M.A., Gardner, W., and Jensen, C., 2014, Spawning related movement of shovelnose sturgeon in the Missouri River above Fort Peck Reservoir, Montana: Journal of Applied Ichthyology, v. 30, no. 1, p. 1-13, https://doi.org/10.1111/jai.12336.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Spawning related movement of shovelnose sturgeon in the Missouri River above Fort Peck Reservoir, Montana |
| Series title | Journal of Applied Ichthyology |
| DOI | 10.1111/jai.12336 |
| Volume | 30 |
| Issue | 1 |
| Publication Date | October 19, 2013 |
| Year Published | 2014 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Coop Res Unit Seattle |
| Description | 13 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Applied Ichthyology |
| First page | 1 |
| Last page | 13 |
| Country | United States |
| State | Montana |
| Other Geospatial | Missouri River |