Overfishing of the oceans

In short: Overfishing describes catching fish stocks to an extent that exceeds their natural reproduction and recovery, causing populations to shrink long-term. It’s among the greatest threats to marine ecosystems worldwide.

In more detail: When more fish are taken than can regrow, the stock declines continuously until fishing itself becomes unprofitable.

In detail

• Global scale: A significant share of the world’s commercially used fish stocks is considered overfished or fished to the limit according to international assessments.
• Bycatch: Non-selective fishing methods often cause many other marine animals besides target species to be unintentionally caught and usually killed.
• Destructive fishing methods: Bottom trawls additionally destroy sensitive habitats like coral reefs and the seabed.
• Ecosystem consequences: The decline of individual fish species can throw entire food webs off balance and put other species under pressure.
• Illegal fishing: Unreported and unregulated fishing complicates stock assessments and significantly undermines protective measures.
• Sustainable fishing: Catch quotas, closed seasons, and certification systems like the MSC label aim to promote more sustainable fishing practices.
• Consumer behaviour: Conscious purchasing decisions and attention to sustainability labels can indirectly help relieve pressure on overfished stocks (plastikmuell-vermeiden-im-alltag, ozeanversauerung-grundlagen).