Umatilla Hatchery Satellite Facilities ; Operations and Maintenance, Annual Report 2001 PDF Download

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Languages : en
Pages : 61

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The Confederated Tribes of the Umatilla Indian Reservation (CTUIR) and Oregon Department of Fish and Wildlife (ODFW) are cooperating in a joint effort to enhance steelhead and re-establish salmon runs in the Umatilla River Basin. As an integral part of this program, Bonifer Pond, Minthorn Springs, Imeques C-mem-ini-kem, Thornhollow and Pendleton satellite facilities are operated for acclimation and release of juvenile summer steelhead (Oncorhynchus mykiss), fall and spring chinook salmon (O. tshawytscha) and coho salmon (O. kisutch). Minthorn is also used for holding and spawning adult summer steelhead and Three Mile Dam and South Fork Walla Walla facilities are used for holding and spawning chinook salmon. In some years, Three Mile Dam may also be used for holding and spawning coho salmon. In the spring of 2002, summer steelhead were acclimated and released at Bonifer Pond (54,917), Minthorn Springs (47,521), and Pendleton (54,366). Yearling coho (1,621,857) were also acclimated and released at Pendleton. Yearling spring chinook salmon (876,121) were acclimated and released at Imeques C-mem-ini-kem. At Thornhollow, 520,564 yearling fall chinook and 307,194 subyearling fall chinook were acclimated. In addition, 104,908 spring chinook were transported to Imeques C-mem-ini-kem in November for release in the spring of 2003. CTUIR and ODFW personnel monitored the progress of outmigration for juvenile releases at the Westland Canal juvenile facility. Nearly all juveniles released in the spring migrated downstream prior to the trap being opened in early July. A total of 100 unmarked and 10 marked summer steelhead were collected for broodstock at Three Mile Dam from September 21, 2001, through April 2, 2002. An estimated 180,955 green eggs were taken from 36 females and were transferred to Umatilla Hatchery for incubation and rearing. A total of 560 adult and 26 jack spring chinook salmon were collected for broodstock at Three Mile Dam from April 22 through June 12, 2002, and were transported to South Fork Walla Walla. An estimated 1,017,113 green eggs were taken from 266 females and were transferred to Umatilla Hatchery. Excess unmarked broodstock (seven adult males, five jacks, and 34 females) were released into the South Fork Walla Walla River at the end of spawning. A total of 168 adult and eight jack spring chinook salmon were transferred from Three Mile Dam to South Fork Walla Walla between June 6 and June 23 for temporary holding. On August 8, 154 adults and eight jacks were released into the South Fork Walla Walla River to spawn naturally. A total of 214 adult spring chinook salmon were transferred from Ringold Hatchery to South Fork Walla Walla between June 7 and June 20 for temporary holding. On August 8, 171 were released into natural production areas in the Walla Walla River basin to spawn naturally. A total of 525 adult and 34 jack fall chinook salmon were collected and held for broodstock at Three Mile Dam from September 16 to November 17, 2002. An estimated 678,122 green eggs were taken from 183 females. The eggs were transferred to Umatilla Hatchery. Coho salmon broodstock were not collected in 2002. Personnel from the ODFW Eastern Oregon Fish Pathology Laboratory in La Grande took samples of tissues and reproductive fluids from Umatilla River summer steelhead and spring and fall chinook salmon broodstock for monitoring and evaluation purposes. Infectious hematopoietic necrosis virus (IHNV) was detected in five of 68 spawned summer steelhead. Summer steelhead were not examined for bacterial kidney disease (Renibacterium salmoninarum; BKD) in 2002. Infectious hematopoietic necrosis virus was detected in 27 of 78 spawned spring chinook females. Two hundred sixty-six spawned spring chinook females were sampled for BKD and two had low to moderate levels of Rs antigen (ELISA OD405 readings of 0.260 and 0.365). All others had low to negative levels of Rs antigen (ELISA OD405 readings of 0.00 to 0.099). Twenty-one spring chinook mortalities were examined for culturable bacteria and enteric redmouth disease (Yersinia ruckeri) was detected in one fish. Cell culture assays for replicating viral agents on spawned fall chinook were negative. One hundred eighty-three spawned fall chinook females were sampled for BKD and all had ELISA readings between 0.00 and 0.099, indicating negative to low level positives. Two fall chinook mortalities were examined for BKD and both had OD405 readings of less than 0.099, indicating negative to very low levels of Rs antigen. Regularly scheduled maintenance of pumps, equipment, and facilities was performed in 2002. Critical maintenance and repair was also performed by Umatilla Passage Facility Operation and Maintenance crews.