Kokanee Stock Status and Contribution of Cabinet Gorge Hatchery, Lake Pend Oreille, Idaho, 1990 Annual Progress Report. [electronic resource]
Kokanee Salmon - Geographical Distribution.
Saved in:
Online Access: |
Online Access |
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Format: | Government Document Electronic eBook |
Language: | English |
Published: |
Portland, Ore. : Oak Ridge, Tenn. :
United States. Bonneville Power Administration ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1991.
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Subjects: |
MARC
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245 | 0 | 0 | |a Kokanee Stock Status and Contribution of Cabinet Gorge Hatchery, Lake Pend Oreille, Idaho, 1990 Annual Progress Report. |h [electronic resource] |
260 | |a Portland, Ore. : |b United States. Bonneville Power Administration ; |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, |c 1991. | ||
300 | |a 76 pages : |b digital, PDF file. | ||
336 | |a text |b txt |2 rdacontent. | ||
337 | |a computer |b c |2 rdamedia. | ||
338 | |a online resource |b cr |2 rdacarrier. | ||
500 | |a Published through the Information Bridge: DOE Scientific and Technical Information. | ||
500 | |a 03/01/1991. | ||
500 | |a "doe/bp-22493-6" | ||
500 | |a "DE92005346" | ||
500 | |a Paragamian, Vaughn L. | ||
500 | |a Idaho Dept. of Fish and Game (IDFG) | ||
520 | 3 | |a Rehabilitation of kokanee Oncorhynchus nerka in Lake Pend Oreille met with some success in 1990, but unexpected results have raised new questions. Estimated kokanee abundance during late August of 1990 was about 6.9 million fish. This is a decline of 19% from 1989, a continued decrease since 1988. The decreased population was attributed to low stocking of hatchery fry (7.3 million), lower wild fry survival in 1990 (1.5%), and exceptionally poor survival of fish ages 3+ and 4+. Average survival of the older fish was only 11% in 1990 compared to 72% in prior years. Compensatory survival was noted for kokanee ages 1+ and 2+, with an average of 81% in 1990 compared to 44% in 1989. Hatchery fry comprised 47% of the total kokanee fry recruitment in 1990 (80% of fry biomass). This contribution ranked third behind 1988 and 1989 since hatchery supplementation began in the 1970s. Survival of hatchery fry was 20%, the second highest since this investigation began. Findings of 1990 indicate a more comprehensive approach to managing kokanee must take into account predator stockings and predator/prey interaction. An unexpected low adult escapement was responsible for an egg-take of only 5.6 million eggs in 1990, 58% of the previous year, which will limit experimental stocking in 1991. Modification of the fish ladder at the Cabinet Gorge Fish Hatchery to improve adult escapement is strongly recommended to increase egg-take. 27 refs., 28 figs., 6 tabs. | |
520 | 0 | |a Kokanee Salmon - Geographical Distribution. | |
536 | |b 1985BP22493. | ||
536 | |b 1985-339-00. | ||
650 | 7 | |a Information. |2 local. | |
650 | 7 | |a Zooplankton. |2 local. | |
650 | 7 | |a Compiled Data. |2 local. | |
650 | 7 | |a Document Types. |2 local. | |
650 | 7 | |a Environmental Effects. |2 local. | |
650 | 7 | |a Hydroelectric Power. |2 local. | |
650 | 7 | |a Monitoring. |2 local. | |
650 | 7 | |a Survival Curves. |2 local. | |
650 | 7 | |a Anadromous Fishes. |2 local. | |
650 | 7 | |a Power. |2 local. | |
650 | 7 | |a Power Generation. |2 local. | |
650 | 7 | |a Environmental Impacts. |2 local. | |
650 | 7 | |a Monthly Variations. |2 local. | |
650 | 7 | |a Aquatic Organisms. |2 local. | |
650 | 7 | |a Environmental Quality. |2 local. | |
650 | 7 | |a Hatching. |2 local. | |
650 | 7 | |a Fishes. |2 local. | |
650 | 7 | |a Migration. |2 local. | |
650 | 7 | |a Animals. |2 local. | |
650 | 7 | |a Water Quality. |2 local. | |
650 | 7 | |a Energy Sources. |2 local. | |
650 | 7 | |a Variations. |2 local. | |
650 | 7 | |a Plankton. |2 local. | |
650 | 7 | |a Developed Countries. |2 local. | |
650 | 7 | |a Dams. |2 local. | |
650 | 7 | |a Progress Report. |2 local. | |
650 | 7 | |a Salmon. |2 local. | |
650 | 7 | |a Numerical Data. |2 local. | |
650 | 7 | |a Predator-prey Interactions. |2 local. | |
650 | 7 | |a Usa. |2 local. | |
650 | 7 | |a Federal Region X. |2 local. | |
650 | 7 | |a North America. |2 local. | |
650 | 7 | |a Population Dynamics. |2 local. | |
650 | 7 | |a Idaho. |2 local. | |
650 | 7 | |a Vertebrates. |2 local. | |
650 | 7 | |a Fisheries. |2 local. | |
650 | 7 | |a Rearing. |2 local. | |
650 | 7 | |a Mortality. |2 local. | |
650 | 7 | |a Electric Power. |2 local. | |
650 | 7 | |a Renewable Energy Sources. |2 local. | |
650 | 7 | |a Data. |2 local. | |
650 | 7 | |a Hydro Energy. |2 edbsc. | |
710 | 1 | |a United States. |b Bonneville Power Administration. |4 spn. | |
710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
856 | 4 | 0 | |u http://www.osti.gov/servlets/purl/5908843-v1Id6b/ |z Online Access |
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