Quick Answer
Gill nets in open water pose risks of entanglement, drowning, and gear loss due to currents and tides. These risks are exacerbated by inadequate net design, material, and usage. Uncontrolled deployment can lead to unintended bycatch and habitat damage.
Net Entanglement and Drowning Risks
Using gill nets in open water increases the risk of entanglement and drowning due to strong currents and tides. A well-designed gill net should have a mesh size and weight that allows fish to escape while preventing larger species from becoming entangled. A general rule of thumb is to use a mesh size of 10-15 cm (4-6 in) for most fish species, with a minimum weight of 1.5 kg (3.3 lbs) per 10 meters (33 ft) of net. This can help reduce the risk of bycatch and entanglement.
Gear Loss and Habitat Damage
Uncontrolled deployment of gill nets in open water can lead to gear loss due to currents and tides, resulting in lost fishing time and resources. This can also cause habitat damage if the net becomes entangled in underwater structures or marine life. To mitigate this risk, it’s essential to use a reliable net marker system, such as floating markers or a depth sounder, to track the net’s position and movement. Additionally, using a gill net with a built-in release mechanism can help minimize habitat damage in the event of gear loss.
Net Design and Material Considerations
The design and material of the gill net also play a critical role in minimizing risks in open water. A durable and weather-resistant material, such as nylon or polyester, should be used for the net’s mesh and rope. The net’s design should also take into account the local currents and tides, with a consideration for using a net with a weighted bottom edge to prevent it from drifting away.
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