Acta Vet. Brno 2006, 75: 123-132

Evaluation of the Dressing Percentage of 3-year-old Experimental Scaly Crossbreds of the Common Carp (Cyprinus carpio, Linnaeus 1758) in Relation to Sex

H. Buchtová1, Z. Svobodová1,2, M. Kocour2, J. Velíšek3

1University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
2Joint Laboratory of Genetics, Physiology and Reproduction of Fish, Institute of Animal Physiology and Genetics, Czech Academy of Science, Liběchov, and University of South Bohemia, Research Institute of Fish Culture and Hydrobiology, Vodňany, Czech Republic
3University of South Bohemia České Budějovice, Faculty of Agriculture, Czech Republic

Received October 24, 2005
Accepted March 16, 2006

The aim of the present study was to compare dressing percentages, with relation to sex, of three bisexual groups of hybrid carp, i.e. Hungarian mirror carp and Northern mirror carp (M2 × M72), the hybrid line of Přerov scaly carp and Northern mirror carp (PS × M72), the hybrid line of P.erov scaly carp and Ropsha scaly carp (PS × ROP), and the pure line of P.erov scaly carp (PS) in harvest size (K3). There were practically no differences in growth variables of male and female carp between the pure line PS carp and M2 × M72 and PS × ROP hybrids. Statistically significant differences in some variables between sexes were found in the scaly hybrid line PS × M72. Females in that group had significantly higher growth rates (TL and SL by 4.08% and 4.52%, respectively; p < 0.05), and their weight variables were also higher (FW, CW and FilletWabs by 11.37%, 13.70% and 14.83%, respectively; p < 0.05 and p < 0.01). The weight of gonads of male carp from all the groups studied was significantly higher (p < 0.01) than that of ovaries of female carp (or, rather, the GSI of male carp was higher).