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Climate change makes baby sharks smaller, malnourished and exhausted



Researchers examined the effects of increased temperature on the growth, development and physiology of Great Barrier Reef Epaulette sharks, and tested embryos and hatcheries in water at 31 degrees Celsius (87.8 degrees Fahrenheit).

The research team found that shark embryos grow faster in warm waters, and the yolk sac (which is their only food source at this stage of development) can be used more quickly.

Researchers from James Cook University and the University of Massachusetts’s Centre of Excellence for Australian ARC Coral Reef Research said on Tuesday that these hatched creatures hatch earlier and are smaller at birth. They need to forage immediately but lack energy.

There are more than 500 kinds of sharks living all over the world, most of them are young sharks. Some sharks, such as the epaulette shark, lay eggs, which are not protected and must be able to live alone for four months.

Jodie Rummer, co-author and associate professor of the ARC Centre of Excellence for Coral Reef Research, said in a statement: “The epaulette shark is known for its ability to change and even acidify the ocean.” “Therefore, if the species can How will the less receptive species survive?”

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The Great Barrier Reef is the largest coral reef in the world, covering nearly 133,000 square miles. It is home to more than 1,500 species of fish, 411 species of hard corals and dozens of other species.

The past decade has been the record for the highest ocean temperature in the world. Researchers warn that by the end of this century, the average summer temperature on the Great Barrier Reef is likely to approach or exceed 31 degrees Celsius.

Rumer said that rising ocean temperatures may threaten future sharks, including spawning and living species, because as the temperature rises, these creatures will be born or hatched into an almost intolerable environment.

Lead author Caroline Wheeler said in a statement: “Given that sharks are already under threat, this study presents a worrying future.”

“Sharks are important predators to keep the marine ecosystem healthy. Without predators, the entire ecosystem would collapse. That’s why we need to continue to research and protect these creatures,” Wheeler, PhD candidate, ARC Coral Reef Research Center of Excellence Added. .

The landmark UN report warns that sea level will rise faster than expected by 2100

Lenmo said: “Our future ecosystem depends on (us) taking urgent action to limit climate change.”

The research was published in the journal Scientific Reports.

The ocean is a good indicator of the true impact of climate change-the ocean covers almost three-quarters of the earth and absorbs most of the world’s heat.
Although we often don’t see it, ocean warming has a profound impact on the entire world. Warmer oceans cause sea levels to rise, causing dangerous coastal flooding and other issues. It causes the loss of sea ice, further heating the waters, and may affect the jet stream, causing the cold air in the Arctic to reach further south, making winter more tense, and threatening animals that rely on sea ice.

Warmer oceans also lead to increased rainfall and lead to stronger and longer lasting storms such as hurricanes Florence and Harvey.

A landmark report discovered by the United Nations Intergovernmental Panel on Climate Change in 2019 showed that the frequency of ocean heat waves that killed large tracts of coral reefs on the planet may have doubled and is expected to become more common and intense.

CNN’s Jen Christensen, Ivana Kottasová and Drew Kann participated in the report.


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