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Chromosomal and morphological abnormalities caused by oocyte ageing in Silurus glanis
Author(s) -
Váarkonyi E.,
Bercséanyi M.,
OzoufCostaz C.,
Billard R.
Publication year - 1998
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1998.tb00590.x
Subject(s) - biology , human fertilization , catfish , hatching , ageing , ovulation , oocyte , zoology , andrology , anatomy , genetics , fishery , embryo , fish <actinopterygii> , pregnancy , medicine
The effects of ageing oocytes for 6 h before fertilization in the European catfish Silurus glanis are compared with the same experiment under normal conditions (stripping and fertilization immediately after ovulation). Fertilization rate and hatching rate are lower in the aged groups, while the percentages of malformed larvae and chromosomal abnormalities are significantly higher. Several kinds of abnormalities are described in detail.