Location: Cool and Cold Water Aquaculture Research
Project Number: 8082-31000-012-009-N
Project Type: Non-Funded Cooperative Agreement
Start Date: Apr 2, 2017
End Date: Sep 30, 2018
The objective of this project is to estimate genetic parameters and evaluate family-based survival and growth performance during the grow-out period of triploid rainbow trout from the November 2015 broodstock nucleus families of Troutlodge, Inc. in a commercial netpen located in the Columbia River, Washington, at the Nespelem facility of Pacific Aquaculture.
Approximately 2,400 triploid rainbow trout pooled from 108 of the November 2015 broodstock nucleus families of Troutlodge, Inc. will be PIT-tagged at the size of ~60 grams and transferred for grow-out in a commercial netpen where they will be mixed with regular production fish from Troutlodge. At the same time of tagging, finclips will be removed for DNA analysis and parentage assignments to enable tracing of the tagged fish back to their nucleus family of origin. Fish will be reared at the Nespelem facility of Pacific Aquaculture for 12-16 months until harvest. As mortality is removed from the pen during the grow-out period, PIT tags will be recovered and read to identify the family origin of the dead fish. At harvest the tags will be recovered and read from the surviving fish and their body size will be recorded. The family-based survival and growth data will be analyzed to estimate the heritability of the survival and growth traits in this challenging aquaculture environment, and to estimate individual family breeding values.