How can the use of modified trawl nets reduce bycatch of bottom-dwelling species?-February 2024-www.zdask.com

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Modified Trawl Nets: Reducing Bycatch of Bottom-Dwelling Species

Definition: Modified trawl nets refer to fishing nets that have been specifically designed and adapted to minimize the unintended capture of non-target species, particularly bottom-dwelling species, also known as bycatch.

Descriptive Explanation: The use of modified trawl nets is a sustainable fishing practice aimed at reducing the incidental catch of bottom-dwelling species during commercial fishing operations. Bycatch, which includes various marine organisms such as fish, crustaceans, and other marine life, often gets entangled or trapped in traditional fishing nets, leading to their unintentional capture and subsequent mortality.

These modified trawl nets incorporate innovative design features and technological advancements to mitigate the impact on non-target species. One common modification is the inclusion of escape panels or sorting grids within the net structure. These openings allow smaller or non-commercial species to escape, reducing their chances of being caught and discarded as bycatch.

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Furthermore, the use of specialized net materials, such as lightweight and biodegradable materials, helps to minimize the physical impact on the seafloor and reduce the likelihood of entanglement. By reducing the contact area with the seabed, modified trawl nets can significantly decrease the disturbance to benthic habitats and the associated bottom-dwelling species.

Additionally, the incorporation of acoustic deterrent devices, such as pingers or underwater speakers, can help repel certain species from the fishing gear, further reducing the likelihood of bycatch. These devices emit specific sounds or signals that are known to deter marine animals, effectively creating a “virtual fence” around the fishing net.

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It is important to note that the effectiveness of modified trawl nets in reducing bycatch of bottom-dwelling species can vary depending on various factors, including the specific fishing location, target species, and fishing practices. Continuous research, monitoring, and adaptation of these nets are essential to ensure their optimal performance and minimize unintended ecological impacts.

Content Tags: modified trawl nets, bycatch reduction, bottom-dwelling species, sustainable fishing, escape panels, sorting grids, net materials, acoustic deterrent devices, benthic habitats, ecological impacts.

Keywords: species, fishing, modified, bycatch, reducing, bottom, dwelling, minimize, target