Juvenile growth and survival of heat-shocked triploid hybrid saugeyes, Stizostedion vitreum X S. Canadense

M. A.R. Garcia-Abiado, W. E. Lynch, K. Dabrowski, S. Czesny, J. Rinchard, J. Stafford

Research output: Contribution to journalArticlepeer-review

Abstract

Triploid hybrid saugeyes may be a desirable stocking alternative because diploid saugeyes are fertile and can compromise the genetic integrity of parental stocks. Four groups of saugeye eggs were heat-shocked 5 min after fertilization for 15 min at 31 °C, which resulted in an 86.7 ± 9.4% triploidy rate and 57.8 ± 24.3% survival to the eyed-stage. Heat shocked and control saugeyes were stocked in two ponds for 40 days at 395 000 ind. ha-1. Mean length and weight of triploid and heat-shocked diploid saugeyes were greater (P < 0.01) than unshocked diploid saugeyes. Survival of heat-shocked saugeyes (22.4%) was lower than unshocked saugeyes (94.7%). Heat-shocked fish (n = 25 851) harvested from ponds were stocked for 153 days in O'Shaughnessy Reservoir, Ohio, USA. Triploids were 34 mm shorter and weighed 41 g less than heat-shocked diploids (P < 0.01). Mean length and weight of triploids were comparable with unshocked diploids elsewhere in Ohio.

Original languageEnglish (US)
Pages (from-to)105-110
Number of pages6
JournalFisheries Management and Ecology
Volume9
Issue number2
DOIs
StatePublished - 2002
Externally publishedYes

Keywords

  • Growth
  • Juvenile
  • Saugeyes
  • Survival
  • Triploidy
  • Walleye

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology

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