RESEARCH ARTICLE


Landlocked Fall Chinook Salmon Egg Survival during Jar and Tray Incubation at a Production Hatchery



Matthew M. Wipf1, Michael E. Barnes2, *, Patrick A. Nero2, Jill Voorhees3
1 Giant Springs State Fish Hatchery, Montana Department of Fish and Wildlife, 4805 Giant Springs Road, Great Falls, Montana 59405 USA;
2 McNenny State Fish Hatchery, South Dakota Department of Game, Fish and Parks, 19619 Trout Loop, Spearfish, South Dakota 57783 USA;
3 Cleghorn Springs State Fish Hatchery, South Dakota Department of Game, Fish and Parks, 4725 Jackson Blvd, Rapid City, SD 57702 USA


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© 2014 Wipf et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the McNenny State Fish Hatchery, South Dakota Department of Game, Fish and Parks, 19619 Trout Loop, Spearfish, South Dakota 57783 USA; Tel/Fax: 605-642-1262; E-mail: mike.barnes@state.sd.us


Abstract

This study compared the survival of landlocked fall Chinook salmon Oncorhynchus tshawytscha eggs incubated in either upwelling jars, either with or without daily formalin treatments, or vertically-stacked trays treated daily with formalin in a production hatchery. In the first year of the study, survival to the eyed-egg stage was significantly greater in eggs incubated in jars without formalin compared to trays, but there was no significant difference in survival to hatch between the treatments. In the second year, there were no significant differences in eggs incubated in trays, in jars without formalin treatments, and in jars with formalin treatments. In the final year, there was no significant difference in eyed-egg survival between eggs incubated in trays and jars without formalin, but survival to hatch was significantly greater in the eggs incubated in jars. Jar incubation is recommended to maximize the survival of landlocked fall Chinook salmon eggs.

Keywords: Chinook salmon, egg, formalin, incubation, jars, Oncorhynchus tshawytscha, trays.