How do Diving Beetles (Dytiscidae) manage underwater oxygen acquisition?
Answer
They carry a physical air bubble held beneath their wing covers (a plastron).
Dytiscidae, referred to as Diving Beetles, have developed a unique mechanical solution for underwater respiration by physically carrying a supply of air. This air supply is stored beneath their hardened forewings, creating a structure known as a plastron. This plastron functions effectively as a physical gill, allowing the beetle to remain submerged for extended durations by relying on the diffusion of oxygen from the surrounding water directly into this stored air pocket. This method contrasts sharply with beetles that must constantly access the atmosphere for respiration.
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