9328 - Laserfiche WebLink

Home Browse Search

Streamside hatching facilities at Gulkana for sockeye and Chinook salmon also appear to be working exceptionally well. Groundwater from the stream is directed through large units of Kitoi egg boxes loaded with sockeye and Chinook eggs. As fry hatch, they are washed into a trapping and enumeration area and from there outplanted. Fry hatch at a similar time as natural spawned eggs. This is a low technology, low cost method of salmon fry production. Coho Coho salmon are stocked into lakes, streams, and net pens for enhancement purposes. Stocking and enhancement procedures in lakes are similar to the sockeye salmon supplementation effort. Some limited success has been achieved with Coho lake stocking, but this program is still in the evaluation stage. Also, some Coho work is being done with net pens in the inlets and salt water areas. PNP reports of 15 to 2Q percent adult survival for some Coho salmon smolt releases a Examples of Coho salmon adult returns from hatchery releases follows: Fingerling-to-adult from Seldovia Lake approximately 1 percent (Dudiak and Boyle 1988). Fingerling-to-adult from Caribou Lake approximately 2-3 percent (Dudiak and Boyle 1988). Up to 4 percent return from smolts on Homer spit (Dudiak and Boyle 1988). In the Yukon River hatchery fingerling produced adult returns of 4.0-8.5 percent and 13.4 percent for wild fish (Raymond 1986). Smolts released from net pens in Prince William Sound returned at a rate in the 15- 20 percent range s Pink and Chum Pink and chum salmon are released as fry (fed or unfed) and go directly to the ocean. Releases can occur directly from hatcheries or from other sites where fish migrate directly to the ocean. Some net pens are used with feeding programs and match release of fry with plankton peaks. The key to success is to get fish to the estuary at peak plankton production. 4ibid. SSuzumota, p. 23. 25