Traffic noise ruining sex lives of frogs
CANBERRA: Traffic noise could be ruining the sex lives of urban frogs by drowning out the seductive croaks of amorous males, an Australian researcher said.
A well-projected and energetic croak was the male frog’s most important asset in the quest to attract mates to his pond, said Melbourne University ecologist Kirsten Parris.
But competition from traffic noise in Melbourne could be a reason why frog numbers had declined in Australia’s secondlargest city since her survey of more than 100 ponds began in 2000, she said.
Frog species with low-pitched croaks were most disadvantaged, she said.
The souther n brown tree frog had adapted by raising the pitch of its croak in areas where there was traffic din, she found.
The popplebonk frog’s call could be heard by females from 800m without background noise. That range now shrank to 14m. – Sapa-AP