Dr Gleadall advises that squid prefer to swim against a fast water flow.
To provide such a flow on a budget, two electric trolling motors could be located on opposite sides of the centrally anchored holding pen causing it to rotate in place; the resulting centrifugal force within the holding pen will creates flow for the squids to swim against.
The (very) rough mock-up below demonstrates centrifugal force creating flow in a cylinder with covered sides and an open netted base.
Stopping the water flow by turning off the motors may provide an additional impetus for the squids to jet out of the holding pen
To provide such a flow on a budget, two electric trolling motors could be located on opposite sides of the centrally anchored holding pen causing it to rotate in place; the resulting centrifugal force within the holding pen will creates flow for the squids to swim against.
The (very) rough mock-up below demonstrates centrifugal force creating flow in a cylinder with covered sides and an open netted base.
Stopping the water flow by turning off the motors may provide an additional impetus for the squids to jet out of the holding pen
Videos below for illustrative purposes only
Using a salad spinner spun by battery powered toy fish to create flow within an open ended floating cylinder with lined sides
Using a salad spinner spun by battery powered toy fish to create flow within an open ended floating cylinder with lined sides
The white capped tube near the perimiter moves with the flow
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The battery powered fish inside the spinner swims against the flow
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© John Byrne