Comparative analysis of results of using different food rations in juvenile wels (Silurus glanis) culture

A preliminary study to determine optimal feed rations for Cyprinus carpio L. × Carassius auratus L. hybrids reared in cages in spent cooling water

“…Long-term studies at the Fisheries Research Station in Nowe Czarnowo have focused on the usefulness of rearing over a dozen common aquaculture fish species in spent cooling water, including rainbow trout, Oncorhynchus mykiss (Walbaum) (Trzebiatowski et al 1981), Nile tilapia, Oreochromis niloticus (L.) (Filipiak et al 1995), African sharptooth catfish, Clarias gariepinus (Burchell) (Filipiak et al 1995), wels catfish, Silurus glanis L. (Filipiak et al 1997a(Filipiak et al , 1997c, Siberian sturgeon, Acipenser baerii Brandt (Filipiak et al 1997b), and sterlet, Acipenser ruthenus L. (Sadowski et al 2000b). However, the most comprehensively studied species is the common carp, Cyprinus carpio L., which has been subjected to many nutritional experiments (Filipiak et al 1998a, 1998b, 1998c, 1999, 1999a, 1999b High carp mortality has been noted since 2002.…”

“…One of the key issues in fish rearing is determining optimal feed rations for particular environmental conditions. This problem of utilizing the so-called metabolic feed ration (feed dose understood as a percentage of the metabolic weight of fish) has been repeatedly studied in spent cooling water conditions (Filipiak et al 1997a, 1997b, Sadowski 1998, Sadowski et al 2000a). This problem is also fundamentally important for developing a technology for rearing the Cyprinus carpio × Carassius auratus hybrid.…”