International Journal of
Fisheries and Aquaculture

  • Abbreviation: Int. J. Fish. Aquac.
  • Language: English
  • ISSN: 2006-9839
  • DOI: 10.5897/IJFA
  • Start Year: 2010
  • Published Articles: 216

Full Length Research Paper

Use of different colours of vertically-suspended structure during the hatchery rearing of juvenile landlocked fall Chinook salmon (Oncorhynchus tshawytscha, Walbaum)

Misty D. Jones
  • Misty D. Jones
  • South Dakota Department of Game, Fish, and Parks, McNenny State Fish Hatchery 19619 Trout Loop, Spearfish, South Dakota 57783, USA.
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Jill M. Voorhees
  • Jill M. Voorhees
  • South Dakota Department of Game, Fish, and Parks, McNenny State Fish Hatchery 19619 Trout Loop, Spearfish, South Dakota 57783, USA.
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Nathan Huysman
  • Nathan Huysman
  • South Dakota Department of Game, Fish, and Parks, McNenny State Fish Hatchery 19619 Trout Loop, Spearfish, South Dakota 57783, USA.
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Eric Krebs
  • Eric Krebs
  • South Dakota Department of Game, Fish, and Parks, McNenny State Fish Hatchery 19619 Trout Loop, Spearfish, South Dakota 57783, USA.
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Michael E. Barnes
  • Michael E. Barnes
  • South Dakota Department of Game, Fish, and Parks, McNenny State Fish Hatchery 19619 Trout Loop, Spearfish, South Dakota 57783, USA.
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  •  Received: 15 November 2019
  •  Accepted: 07 July 2020
  •  Published: 31 July 2020

Abstract

This study investigated the effects of coloured structures on the growth of juvenile landlocked fall Chinook salmon (Oncorhynchus tshawytscha, Walbaum) during hatchery rearing. Structures consisted of an array of four aluminum angles painted one of four colours: Silver, red, black and green, which were vertically suspended in circular tanks. After 25 days, mean total lengths and weights of individual salmon reared in tanks with the green arrays were significantly (P < 0.05) larger than those reared with silver, red or black arrays. Condition factor was not significantly different (P > 0.05) among the colour treatments. Final total tank biomass and gain were also not significantly different (P > 0.05) among the colour treatments. The results of this study indicate that structural colours could be considered to maximize juvenile Chinook salmon growth during hatchery rearing. 

Key words:  Chinook salmon, colour, Oncorhynchus tshawytscha, hatchery rearing.