Influence of broodstock age on reproductive performance in koi carp (Cyprinus carpio L.)

The koi carp (Cyprinus carpio L.) is a very important species in the ornamental fish culture. This fish, in relation to the variety of its colour patterns is very appreciated and it can obtain an higher market price compared to the common goldfish. In the last ten years, breeding goals have increasingly focused their attention to the morphological characteristics (Cherfas et al., 1992) and numerous research works were carried out on pigmentation and viability of different colour phenotypes (Jackson et al., 2000). More recently, several studies were set up in order to produce diploid gynogenotes and triploids (Rothbard et al., 1999)..