New Tool Developed to Monitor Health of Marine Ecosystems and Extinction Risk of Species
Published:20 Nov.2022    Source:ScienceDaily
In a new study published recently in the journal Science, it have developed a global indicator that measures the state of marine biodiversity based on changes in extinction risk recorded over seven decades in oceanic predatory fishes.The study reveals how, since the 1950s, the global extinction risk of oceanic predatory fishes has continuously worsened due to excessive fishing pressure until the late 2000s.
The results offer some hope after the global rebuilding of commercially important tuna and billfish species yet reveal a problem in the management of sharks captured incidentally by the same fisheries, showing the urgency of implementing actions to prevent their increasing risk of extinction.Then, the implementation of management measures in international fisheries organizations effectively reduced fishing mortality, recovering tunas and billfishes. Yet the extinction risk in the undermanaged sharks continues to rise.
If we don't do anything to mitigate overfishing and lack of effective management, the loss of these species threatens the balance of ecosystems and risk of food security and jobs in both developed and developing countries.The study's authors believe it's possible to replicate the successes of tuna and billfish fisheries management for sharks. They say oceanic sharks urgently need better management and protection from overfishing, by regulating trade, redefining priorities in international fisheries bodies and settling clear biodiversity goals and targets.Implementing science-based catch limits and changing how and where gear is deployed can avoid and minimize the incidental catching of sharks, the study finds.