Title: Gynogenesis in the african catfish (clarias-gariepinus) .1. induction of meiogynogenesis with thermal and pressure shocks
Authors: Volckaert, Filip ×
Galbusera, Pha
Hellemans, Bas
Van Den Haute, C
Vanstaen, D
Ollevier, Frans #
Issue Date: Dec-1994
Publisher: Elsevier science bv
Series Title: Aquaculture vol:128 issue:3-4 pages:221-233
Abstract: Meiogynogenesis of the African catfish (Clarias gariepinus) was optimized by altering the intensity, duration and timing of application of pressure, heat or cold shocks shortly after activation of the egg with sperm which had been genetically inactivated with UV irradiation. The distributions of the survival rates showed a unimodal (heat and hydrostatic pressure shock) or bimodal (cold shock) pattern and were specific to each treatment. The timing of the expulsion of the second polar body invariably occurred 3 to 5 min after fertilization. Of the three methods tested, cold (5 degrees C, during 40 min at 3 min post-activation) and pressure (55.00 MPa during 2 min at 3 min post-activation) shocks turned out to be the most efficient in terms of survival rate. A relative hatching rate of up to 81% of gynogenetic diploid fish was achieved. The final proof of gynogenetic status was made with a paternity test by means of multiple-locus DNA fingerprinting.
ISSN: 0044-8486
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Ecology, Evolution and Biodiversity Conservation Section
× corresponding author
# (joint) last author

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