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Jack mackerel caught by a Chilean purse seiner Fishing down the food web. Overfishing is the removal of a species of fish (i.e. fishing) from a body of water at a rate greater than that the species can replenish its population naturally (i.e. the overexploitation of the fishery's existing fish stock), resulting in the species becoming increasingly underpopulated in that area.
Sustainability can mean different things to different people. Some may view sustainable fishing to be catching very little in order for fish populations to return to their historical levels (represented by the upper left green area), while others consider sustainability to be the maximum amount of fish we can catch without depleting stocks any further (red dot).
Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming. These impact marine ecosystems and food webs and may result in consequences as yet unrecognised for the biodiversity and continuation of marine life forms.
Assigning Large-Scale Marine Protected Areas (LSMPAs) (at least 100,000 square km in area) aims to reduce the consequences of resource exploitation (e.g. overfishing) and to protect ocean ecosystems by reducing human disturbance in designated areas. However, there are related concerns surrounding LSMPAs that need attention in order to help ...
Overfishing of sharks has increased as the global demand has skyrocketed in recent years. Sharks are hunted for their meat, skin, cartilage, fins, livers, and teeth.
The overfishing list reflects species that have an unsustainably high harvest rate. NOAA also keeps a list of overfished stocks. Those are species that have a total population size that is too low.
Sea turtle entangled in a ghost net. Ghost gear is fishing gear that has been left or lost in the ocean. [7] [15] The gear can potentially continue to catch or entangle any species of marine life as it drifts through the water or snags on rocky reef, eventually killing the entangled organism through laceration, suffocation or starvation. [16]
Dec. 8—Aquatic biologists have long known the importance of algae-eating fish to the overall health of coral reefs. But new research documents just how important species like surgeonfish and ...