Polyploidy Induced in Brook Trout by Cold Shock
- 1 November 1980
- journal article
- research article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 109 (6) , 626-631
- https://doi.org/10.1577/1548-8659(1980)109<626:piibtb>2.0.co;2
Abstract
Freshly fertilized eggs of brook trout, Salvelinus fontinalis, were cold‐shocked, after 1 minute of water hardening, in a 5% glycerol solution at −1.5 C for 2 hours. Egg mortality was significantly increased by this process. A chromosome analysis indicated that 33% of the brook trout hatched from cold‐shocked eggs from females induced to spawn were mosaic polyploids, compared with 12% of the fry from noninduced females. No exclusively triploid brook trout were found by chromosome analysis. Frequency distributions of erythrocyte nuclear volumes indicated a higher incidence of mosaic polyploidy among fish than did chromosome counts for the same specimens. The reasons for this inconsistency are not known.This publication has 1 reference indexed in Scilit:
- Reproductive Sterility in Polyploid Brook Trout, Salvelinus fontinalisTransactions of the American Fisheries Society, 1978