Resistance and capacity adaptation of juvenile silver carp, Hypophthalmichthys molitrix (Val.), to temperature and salinity

Abstract

In a bifactorial resistance experiment, silver carp fry reached their maximum salinity resistance at 18–22°C. The oxygen deficiency of animals adapted to brackish water is lower than that of fish from fresh water. Temperature fluctuations affect the standard and routine metabolic rates and other functional parameters of the metabolism differently. After long-term adaptation to oligo-mesohaline conditions, the fish reached their minimum standard metabolic rate at 3–4‰S. Metabolic adaptation, measured in terms of locomotory activity and oxygen consumption, to sudden changes in salinity varies with the salinity gradient and temperature.