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Firma Nyheter:
- WWF: Marine populations have declined nearly 50% since 1970
Using similar methodology to WWF’s Living Planet Report 2014, the new study finds the world’s oceans have lost about 50% of vertebrate species including whales, turtles, and sharks Major commercial species – tunas, bonitos and mackerels in particular – are showing an even more startling decline of 74% between 1970 and 2010
- Shark attacks in the US occur most in these 12 states
Due to overfishing, their population has decreased by more than 70% in the last 50 years Clearly, humans are more threatening to sharks than shark bites are to humans "Shark attacks are rare and
- Bycatch and Overfishing, An Overview | Shark Allies
Sharks used to be cut loose, and every released shark had a high chance of survival Bycatch is not always accidental Mitigation methods exist, but they are not used because they may be more time-consuming, more expensive, or simply not desired because there is no incentive to avoid the “bycatch” It may even be desired, as in the case of
- Behavioral Adaptations For Sharks - Sciencing
Sharks' ability to sustain life as the apex of the aquatic ecosystem for more than 400 million years speaks volumes about their physical and behavioral adaptations This predator, known for razor-sharp teeth and swift movements, combines such attributes with a range of behaviors to carry on necessary processes inherent to survival and supremacy at the top of the food chain in the ocean habitat
- Rapid worldwide depletion of predatory fish communities - Nature
The highest initial rate of decline was seen in South Georgia , which has a narrow shelf area that was effectively fished down during the first 2 years of exploitation 14 Less-than-average
- Trends in global shark attacks | PLOS One
Shark attacks are a global phenomenon that attracts widespread attention and publicity, often with negative outcomes for shark populations Despite the widespread perceptions of shark attacks, trends in human water activities and shark populations are both dynamic, resulting in variable rates of shark attacks over space and time Understanding variable trends in shark attacks may contribute to
- How will sharks respond to climate change? It might depend on . . .
With a rise in water temperature of just 3°C, the energy required to survive is more than twice that of current day temperatures for the Port Jackson sharks in Adelaide
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