Maximum critical temperature and oxygen consumption during thermoregulation in Macrobrachium americanum (Bate, 1868) adult prawns

Macrobrachium americanum is a large prawn living in rivers and coastal water bodies of tropical subtropical ecosystems the Pacific side Americas. Water temperature salinity are main physicochemical variables determining its distribution. Temperature also influences metabolic rate, which determines growth rate reproduction. Because this, preferred temperature, critical thermal maximum (CTMax), O2 consumption rates at four temperatures (20, 24, 28, 32°C) were tested from wild prawns laboratory assays. Those correspond to annual fluctuations sampling site. The final this species close 26.4°C. acclimatization has an almost linear effect on CTMax (R2 = 0.987, P < 0.05), oxygen routine increased as acclimation 20 32°C.