Some tropical fish may be
able to cope with rising sea temperatures better than previously
thought, Australian scientists have discovered.
The finding that
some fish can adjust to warmer sea temperatures over several generations
comes amid rising concern about the future of coal reefs due to global
warming.
Researchers at the ARC Centre of Excellence in Coral Reef
Studies, James Cook University and CSIRO were seeking to discover how
fish would cope with the elevated sea temperatures expected by 2050 and
2100.
Lead researcher Jennifer Donelson said when damsel fish were
exposed to water temperatures 1.5 degrees and three degrees above
normal, there was an expected decline in their aerobic capacity.
"This affects their ability to swim fast and avoid predators," she said.
But
when the fish were bred for several generations at higher temperatures,
the second generation offspring had almost completely adjusted.
"We were amazed, stunned even," Ms Donelson said.
"It shows that some species can adjust faster than the rate of climate change."
No comments:
Post a Comment