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Evaluate the Life History of Native Salmonids in the Malheur Subbasin, Fiscal Year 2008 Annual Report.

“…Data collected from radio tagged bull trout in 2000 and 2001 suggests that, at least for fluvial bull trout populations, migration through the property occurs before the Critical Stream Temperature Period associated with annual temperature maximums (Appendix A see also Schwabe 2000 andSchwabe 2001). In 2000, all radio tagged bull trout except one individual were above the Upper Malheur weir by 29 June (Map 1) and had successfully migrated upstream of the property by 6 July (Map 2).…”

“…1) with both resident and migratory individuals observed Schwabe et al 2004). Historically bull trout were also observed in Snowshoe Creek but the species was extirpated from this tributary following a wildfire in 1989 and now only brook trout are observed.…”

“…The project consists of 1760 deeded acres in which Lake Creek, Big Creek and McCoy Creek combine to form the Upper Malheur River. BPT has maintained five temperature sites on the Upper Malheur since acquiring the property in April 2000 (Namitz 2000, Schwabe 2001, Schwabe 2002, Schwabe 2003, Schwabe 2004, Schwabe and Fenton 2005, Fenton 2006, Schwabe 2007. Of these five sites, two sites are stationed on Lake Creek, two sites are stationed on Big Creek and one site is stationed at their confluence (Table 1).…”

“…Historically bull trout were also observed in Snowshoe Creek but the species was extirpated from this tributary following a wildfire in 1989 and now only brook trout are observed. Radio telemetry has shown that migratory adult bull trout collected downstream of spawning areas in the upper Malheur River primarily utilize the Big Creek system for spawning (Big Creek and Meadow Fork;Schwabe et al 2001;Fenton et al 2006). It is suspected that bull trout in Lake Creek are primarily resident fish that are isolated due to current land use practices.…”

Hybrids between Pseudoplatystoma corruscans and P. reticulatum (Siluriformes: Pimelodidae) previously reported in the Upper Paraná River are likely escapes from aquaculture farms: evidence from microsatellite markers

“…Hybrids are becoming more common in natural environments as a result of environmental degradation, introduction of foreign species, breeding of artificial interspecific hybrids for aquaculture, and shifts in the distribution of species associated with climate changes (RhymeR & SymbeRloff 1996, AllendoRf et al 2001, ScRibneR et al 2001, WAltheR et al 2009). Hybridization can homogenize distinct populations and species, and cause a reduction in local adaptations and genetic diversity (olden et al 2004).…”