An aquarium system is described which was designed to examine the locomotor activity of juvenile salmon under simulated estuarine conditions. A stable, vertically stratified water column can be established and dissolved oxygen, salinity, water velocity, and light intensity varied during operation under continuous-flow or recirculating conditions. Examples of stratification stability and application to studies of fish behaviour in relation to hypoxia are also presented.
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Birtwell et al. (1987) studied this question.
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