Aquat. Living Resour.
Volume 14, Number 5, September 2001
|Page(s)||327 - 334|
|Published online||15 September 2001|
Triploidy induced by pressure shock in Arctic charr (Salvelinus alpinus): growth, survival and maturation until the third year
Institut national de la recherche agronomique, BP 511, 74203 Thonon cedex, France
2 Syndicat des sélectionneurs avicoles et aquacoles français, Section aquacole, Station Scribe, campus de Beaulieu, 35042 Rennes, France
Accepted: 29 August 2001
Retention of the second polar body for the production of triploid Arctic charr (Salvelinus alpinus) was induced by 65 MPa (650 bar) pressure shocks applied 30, 40 or 50 min after fertilization, each shock lasting 5 min. Triploid yield (percentage of relative survival to control × percent triploidy) varied from 55 to 100 % and it was generally superior to 80. Despite increased mortality and decreased growth in diploid charrs during the spawning period, growth and survival did not differ between diploid and triploid Arctic charr up to and during their third year of life. Most of the triploid males had developed testis, but they did not render milt; few triploid females had developed ovaries. Fecundity of triploid females was low and fertilized eggs from triploid females did not hatch.
Key words: fecundity / mortality / pressure shock / reproduction / triploidy
© Elsevier, IRD, Inra, Ifremer, Cemagref, CNRS, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.