Open AccessGrowth Performance of All‐Female and Mixed‐Sex Common Carp Cyprinus Carpio L. Populations in the Central Europe Climatic Conditions
Author(s) -
Kocour Martin,
Linhart Otomar,
Gela David,
Rodina Marek
Publication year - 2005
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.2005.tb00136.x
Subject(s) - biology , purebred , cyprinus , common carp , carp , population , sex ratio , body weight , seasonal breeder , zoology , crossbreed , fish <actinopterygii> , demography , fishery , endocrinology , sociology
The results of a 4‐yr study focused on comparing growth performance in all‐female and mixed‐sex populations of common carp are presented. All‐female and mixed‐sex populations of purebred Northern mirror carp (M72) and scaly crossbreds of female Ropsha (ROP) and male/neomale M72 carp (ROP × M72) were used for this experiment. Average weight and survival after each growing season and slaughtering value after the third and fourth year of the study were measured. While after 8 wk of rearing no differences between all‐female and mixed‐sex populations were found, the 1‐yr‐old all‐female mirror carp population (M72) gained 29.7% more weight ( P < 0.0001) than the mixed‐sex (68.5:± 15.8 g against 52.8:± 13.9 g; meant S.D.) population. After the second, third and fourth year of rearing, live weight was 9.5% ( P = 0.0062) and 6.8% ( P = 0.0229) and insignificantly 5.1 % higher, respectively, in the all‐female population. There was no significant difference, even after the fourth growing season, in live weight between all‐females and bisexual scaly crossbreds (2,192 g± 478.3 and 2,206 g± 484.5, respectively). The percentage of the main edible parts (processed body, filleting yield) was significantly higher in both mirror and scaly, all‐female populations at 3 yr of age but not significantly different in 4‐yr‐old fish. No distinct differences in survival and body shape of all‐female and bisexual populations were found. The potential of all‐female populations for commercial production is discussed.