Tag Archives: dissolved oxygen

McLane Releases Wave-Actuated Profiling Crawler for 500 m Depths

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McLane Research Labs has released the Prawler (PRofiling crAWLER), a low-cost, wave-actuated vehicle that moves along the mooring wire, collecting data from the surface to 500 m of the water column. Data can include conductivity, temperature, depth (CTD), optical backscatter and dissolved oxygen. Wave motion and special ratcheting clamps move the vehicle up the wire. The Prawler free-falls to the

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Dead Zones that Choke Marine Life Also Found in Freshwater Streams

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Hypoxic dead zones, which occur when dissolved oxygen levels in water drop so low that fish and other aquatic animals living there suffocate, are well-documented problems in many coastal waters. Now, a Duke University-led study reveals that they also occur in freshwater urban streams. The study measured dissolved oxygen concentrations, light levels, water chemistry and stream flow in six streams

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