Deep-sea midwater fishing blind spot threatens large predators
Key Questions
What does Hawaiian longline data reveal about midwater fishing?
Data since the mid-2000s show substantial bycatch of opahs, lancetfish, and snake mackerels, with global estimates exceeding 1 million tons. This challenges the view that the twilight zone remains unfished.
How does midwater fishing impact apex predators and carbon cycling?
Hidden catches affect large predators and disrupt carbon transport in the deep ocean. The blind spot in current assessments underestimates these ecosystem effects.
What additional evidence highlights longline bycatch problems?
Articles note that one in five animals caught on longlines are unintended bycatch, including sharks, turtles, and seabirds. This adds pressure on predator populations already stressed by other factors.
Hawaiian longline bycatch data reveals substantial catches of opahs, lancetfish, snake mackerels since mid-2000s, with global estimates >1 million tons. Challenges assumption that twilight zone is unfished, highlighting hidden fishing impacts on apex predators and carbon cycling. Today's reading included an article 'Against Longlining' reinforcing that 1 in 5 animals caught is unintended bycatch (sharks, turtles, seabirds), adding to the evidence of fishing pressure on predators.