Rare dolphins return to Hong Kong as coronavirus halts ferry traffic

LAURENT FIEVET / AFP

The number of Indo-Pacific humpback dolphins seen around Hong Kong has jumped due to the pause in high-speed ferry traffic due to the coronavirus, scientists said.

Marine scientist Lindsay Porter of the University of St. Andrews said the mammals - also known as Chinese white dolphins and pink dolphins - were moving back into parts of the Pearl River Delta that they typically avoided due to the ferries that connect Hong Kong and Macau.

Dolphin numbers in the area had jumped by up to 30 per cent since March when the ferry traffic was suspended, allowing scientists a rare opportunity to study how underwater noise affected their behaviour, she said.

"These waters, which were once one of the busiest thoroughfares in Hong Kong, have now become very quiet," said Porter, who has studied dolphins for three decades from Hong Kong.

From a small rubber boat, Porter and her team drop microphones into the water and use drones to watch for dolphins.

The research suggested the dolphins had adapted more rapidly than expected to the quiet environment, and the population was likely to rebound when such stressors were removed, Porter said.

Scientists think there are about 2,000 dolphins in the entire Pearl River estuary. A Hong Kong government survey from 2019 found only about 52 dolphins entered the waters around the Asian financial hub, but Porter believes the real number may be slightly higher.

"I sometimes feel that we're studying the slow demise of this population, which can be really sad," she said.

Still, even if this population’s decline could not be stopped, the research could help other dolphin populations elsewhere, she said.

Hong Kong’s conservation plans have focused on opening marine parks, where ship traffic is limited but not banned. Three of those areas are frequented by dolphins.

The Hong Kong WWF, a conservation group, and Porter said such measures were inadequate as dolphins were still in danger of being hit by ferries as they moved between the protected areas.

"It means that if we did have a comprehensive management plan in Hong Kong with more effective conservation measures, we might be able to quickly stop the decline in the dolphin population," she said. 

More from Quirky

Coming Up on Dubai Eye

  • The Business Breakfast

    6:00am - 10:00am

    The Business Breakfast is the day’s must listen for the UAE’s business leaders, and those who aspire to be.

  • The Agenda

    10:00am - 1:00pm

    Broadcasting every weekday, Georgia Tolley goes beyond the headlines to speak to government ministers, decision makers, analysts and local experts to find out how the news will impact those of us living in the UAE.

BUSINESS BREAKFAST LATEST

On Dubai Eye

  • Is There Sufficient House Supply In UAE

    Dubai’s current population is more than double compared to almost twenty years ago, which now stands at 3.7 million. Lots of families are also moving to the UAE now. So what does it mean for the property market?

  • Noon's First Female Delivery Driver

    Glory Ehirim Nkiruka is Noon’s first ever female delivery driver. In her first ever interview, she explained why she loves her job, despite the heat!