| Title | Detecting the effects of management regime shifts in dynamic environments using multi-population state-space models |
| Publication Type | Journal Article |
| Year of Publication | 2018 |
| Authors | Falcy, Matthew R., and Erik Suring |
| Secondary Title | Biological Conservation |
| Volume | 221 |
| Pagination | p.34-43 |
| Date Published | 2018, May |
| Call Number | OSU Libraries: Electronic Subscription |
| Keywords | Alsea River Basin, Beaver Creek, Coho salmon = Oncorhynchus kisutch, Coos River Basin, depleted populations, habitats, human impacts, juvenile fish, Lower Umpqua River Basin, mathematical modeling, natural resource management, Nehalem River Basin, Siletz River Basin, statistical analysis, Yaquina River Basin |
| Notes | Oregon populations of wild coho salmon were in decline until they were listed by the Federal Government as threatened populations in 1998. Subsequent efforts to restore coho included reducing hatchery production, restoring habitats and cutting allowable harvests. At the same time, ocean conditions improved, favoring adult salmon survival. In this paper, the authors’ objective “was to assess change in the freshwater production of juvenile production of juveniles (smolts) through time in order to determine if recent increases in adult abundance could be related to management affecting the freshwater juvenile production” (from the Abstract). Interestingly, the authors did not find any improvement in the survival of juvenile fish per spawning salmon. Instead, they attribute the rebound in coho population to improved ocean conditions. Various aspects of this complex fishery management issue are discussed. |
| DOI | 10.1016/j.biocon.2018.02.026 |
