Physiological responses of the ghost shrimp Neotrypaea uncinata (Milne Edwards 1837) (Decapoda: Thalassinidea) to oxygen availability and recovery after severe environmental hypoxia.

摘要: Abstract Hypoxia is a common and widespread phenomenon in aquatic ecosystems, imposing significant challenge for the animals that inhabit such waters. In different habitats, however, characteristics of these hypoxic events may differ, therefore challenges. We investigated tolerance adult ghost shrimp Neotrypaea uncinata (an intertidal mudflat dweller) to partial pressures oxygen ( p O 2 ), severe hypoxia (2 kPa) recovery from after exposure times, mimicking natural tidal cycle (6 h 12 h). calculated critical tension categorize shrimps as oxyregulators R value = 75.27%). All physiological measurements (metabolic rate, oxyhemocyanin, hemolymph protein lactate concentrations) were affected by low oxygen, but most them recovered (with exception metabolic rate) control values (21 kPa) 6 h under normoxic conditions. Low high release hemolymphatic proteins anaerobic metabolism are suggested response mechanisms overcome during tide.