For how long can yabbies survive short periods when dissolved oxygen concentration is 0 mg L⁻¹?
Answer
Short periods
A critical indicator of the yabby's exceptional environmental tolerance is its capacity to withstand severely hypoxic or anoxic conditions. The organism's growth is observed to halt if the dissolved oxygen concentration drops below 1 milligram per liter (mg L⁻¹). More remarkably, the yabby possesses the physiological ability to survive for brief intervals even when the concentration of dissolved oxygen reaches absolute zero (0 mg L⁻¹). This acute tolerance is closely tied to its ability to breathe atmospheric air, a trait that permits terrestrial migration, but the survival window during periods of complete anoxia in water remains limited to short, non-prolonged durations before irreversible systemic failure occurs.
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