By Jove, it's the bycatch
Re: "The human toll behind your seafood", (Opinion, July 28).
In this opinion piece, writer Claire Kietduriyakul succinctly red-flagged issue of juvenile fish caught as part of the so-called "bycatch" by destructive fishing gear.
Bycatch refers to the unintentional capture of species not targeted by the fishing industry--such as dolphins, turtles, seabirds, juvenile fishes, snakes, rays and sharks and is already causing unprecedented declines of non-target species.
These species often die after capture, leading to population declines, especially among endangered and vulnerable species. Many bycaught species like sea turtles, some shark species, and marine mammals are already listed as threatened or endangered. It leads to disruption of the natural ecosystem. Predators, prey and competitors are often caught unintentionally. Removing key species can destabilise food webs and lead to trophic cascades, affecting the entire marine ecosystem.
Bycatch often includes juvenile individuals of commercially valuable species, reducing their chances of reaching maturity and reproducing. This leads to long-term population declines and less sustainable fisheries. Species like albatrosses, sea lions, and dolphins are particularly vulnerable to certain fishing methods (eg, longlines, gillnets).
These species play unique ecological roles and their loss affects coastal and ocean biodiversity. Many species affected by bycatch migrate across international waters. Their decline contributes to global-scale biodiversity loss, not just in specific regions.
Solutions to reduce the bycatch include use of bycatch reduction devices (BRDs), adoption of sustainable fishing practices, marine protected areas, and stronger monitoring and enforcement of fishing regulations. In conclusion, bycatch is a hidden but major driver of biodiversity loss in aquatic ecosystems. Addressing it is essential for protecting marine life, maintaining ecological balance, and ensuring sustainable fisheries.