Interação do cálcio e nitrito na água: sobrevivência, crescimento, parí­¢metros hematológicos e metabólicos em jundiá

Abstract

The objective of this study was to determine the effect of different waterborne nitrite (NO 2 -) and calcium (Ca 2+ ) levels on growth, biochemical and hematological parameters of silver catfish juvenile (Rhamdia quelen). Fish were submitted to low (0.05 mg L -1 ) or high (1.3 mg L -1 ) NO 2 and low (7 mg L -1 ) or high (14 mg L -1 ) Ca 2+ levels (four replicates) for 60 days. At the end of the experimental period, fish exposed to high NO 2 showed lower weight gain, biomass and specific growth rate than those maintained at low NO 2 , irrespective of Ca 2+ levels.

Water hardness variously influences tissue physiology of freshwater fish -Cyprinus carpiovarkoi: A report on glucose, oxidative stress and antioxidant biomarkers

“…The prior literature indicates that biomarkers are instrumental in understanding the effects of water hardness in fish. Investigations in Pacu ( Piaractus mesopotamicus ) (Copatti et al 2019a; Neves et al 2022), Silver Catfish ( Rhamdia quelen ) (Neves et al 2017) and Kutum fingerlings ( Rutilus frisii kutum ) (Taghizadeh et al 2013), justify the importance of glucose as as marker for effects of water hardness. Even redox status also provides substantial insights into the physiological effects of water hardness in fish.…”