Utjecaj sivog glavasa (Aristichthys nobilis Rich.) na dinamiku zooplanktona i prirast sarana.
1984
Misetic S. | Novacic Dj.
In the paper is examined the influence of Aristichthys nobilis Rich. hatch on physical and chemical conditions, dynamics of zooplankton and carp increase (Cyprinus carpio). According to gotten results, it is proved that Aristichthys nobilis Rich. does not influence the change of physical and chemical characteristics. The hatch of Aristichthys nobilis Rich. of 405 pieces / ha of the mass of 26,8 kg/ha influenced the decreasing of total number of zooplankton already after June. The hatch of Aristichthys nobilis Rich. of 247 pieces/ha of the mass of 12,3 kg/ha influenced the decreasing of total number of zooplankton after July. The dynamics of zooplankton badly resulted in to piece increment, production and total increment of carp and of Aristichthys nobilis Rich. The conclusion is that semicultural breeding gives much better productive results. In this breeding has to be kept in mind the interspecies competetion relations. Carp in a semiculture could be not increased less than it would be increased in monoculture.
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