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Monkeys Who Recently Died in Hong Kong's Zoo Had Been Infected with Melioidosis

Giant tubeworms on the seafloor surface at 2,500 meters water depth at the East Pacific Rise, a volcanically active ridge located where two tectonic plates meet on the floor of the Pacific Ocean in this undated photograph.CC BY-NC-SA Schmidt Ocean Institute/Handout via REUTERS
Giant tubeworms on the seafloor surface at 2,500 meters water depth at the East Pacific Rise, a volcanically active ridge located where two tectonic plates meet on the floor of the Pacific Ocean in this undated photograph.CC BY-NC-SA Schmidt Ocean Institute/Handout via REUTERS
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Monkeys Who Recently Died in Hong Kong's Zoo Had Been Infected with Melioidosis

Giant tubeworms on the seafloor surface at 2,500 meters water depth at the East Pacific Rise, a volcanically active ridge located where two tectonic plates meet on the floor of the Pacific Ocean in this undated photograph.CC BY-NC-SA Schmidt Ocean Institute/Handout via REUTERS
Giant tubeworms on the seafloor surface at 2,500 meters water depth at the East Pacific Rise, a volcanically active ridge located where two tectonic plates meet on the floor of the Pacific Ocean in this undated photograph.CC BY-NC-SA Schmidt Ocean Institute/Handout via REUTERS

Nine monkeys who died in Hong Kong's oldest zoo in two days this week had been infected with an endemic disease, possibly after some digging work near their cages, officials said on Friday.

Secretary for Culture, Sports and Tourism Kevin Yeung said in a press briefing that the animals in the Hong Kong Zoological and Botanical Gardens contracted melioidosis and the disease later caused them to develop sepsis, according to The AP.

Yeung stressed that such infections typically occur through contact with contaminated soil and water and that there is generally no danger to humans from contact with infected animals or people.

“We're saddened by the passing of the nine monkeys,” he said.

Eight monkeys were found dead on Sunday, and another died Monday after displaying unusual behavior. The deceased animals were a De Brazza’s monkey, a common squirrel monkey, four white-faced sakis and three cotton-top tamarins — a species listed as critically endangered by the International Union for Conservation of Nature.

According to Hong Kong's Center for Health Protection, melioidosis is caused by the bacterium Burkholderia pseudomallei, which is widespread in soils and muddy water.

Yeung said the park conducted digging work to repair some irrigation pipes under the flower bed near the monkey cages in early October and that the deaths might be related to that.

He said the monkeys might have come into contact with the bacteria after the park's staff walked into their cages with possibly contaminated shoes. Another possibility is that some infected monkeys had close contact with other monkeys, he said.

“The incubation period for melioidosis in primates is about a week and this matched with the period after the soil digging work,” he said.

Edwin Tsui, the controller of the center, said the incident only happened in a single zone and its impact on Hong Kong residents would be very low.

Yeung on Monday held an urgent interdepartmental meeting about the deaths with the Leisure and Cultural Services Department, the Agriculture, Fisheries and Conservation Department and the Department of Health.

Another De Brazza’s monkey also displayed unusual behavior and appetite but offiicials said its condition remained stable on Friday.

The Hong Kong Zoological and Botanical Gardens — the oldest park in the former British colony — fully opened to the public in 1871. It is a rare urban oasis in the downtown Central district of the financial hub, which returned to Chinese rule in 1997.

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Study: Deep Ocean Marine Heatwaves May be Under-reported

Waves hit the rocks on the shores of the Pacific Ocean at Rapa Nui national park area managed by the Mau Henua native community at Easter Island, Chile October 1, 2024. REUTERS/Ivan Alvarado
Waves hit the rocks on the shores of the Pacific Ocean at Rapa Nui national park area managed by the Mau Henua native community at Easter Island, Chile October 1, 2024. REUTERS/Ivan Alvarado
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Study: Deep Ocean Marine Heatwaves May be Under-reported

Waves hit the rocks on the shores of the Pacific Ocean at Rapa Nui national park area managed by the Mau Henua native community at Easter Island, Chile October 1, 2024. REUTERS/Ivan Alvarado
Waves hit the rocks on the shores of the Pacific Ocean at Rapa Nui national park area managed by the Mau Henua native community at Easter Island, Chile October 1, 2024. REUTERS/Ivan Alvarado

Heatwaves deep in oceans may be "significantly under-reported", highlighting an area of marine warming that has been largely overlooked, a joint study by Australia's national science agency (CISRO) and the Chinese Academy of Sciences has found.
The study, which was published on Thursday in the Nature scientific journal, found that 80% of marine heatwaves below 100 meters are independent of surface events, Reuters reported.
It said researchers used observational data from more than two million ocean temperature profiles from global oceans.
"These findings deepen our understanding of the frequency and intensity of extreme temperature events under the ocean surface and possible implications," CISRO's Ming Feng said.
Marine heatwaves are prolonged temperature events that can cause severe damage to marine habitats, such as impacts to coral reefs and species displacement, the study said.
These events are becoming more common due to global warming, causing "catastrophic ecological and socioeconomic impacts," it said.
The majority of previous studies on marine heatwaves have focused on surface signals based on widely available satellite observations of sea-surface temperature.
The finding of separate, deeper warming was particularly worrying, the research found, because it affects the habitat of so many creatures and what they feed on.
"Extreme temperature events below the sea surface are of greater ecological concern because they affect the habitat of most marine primary producers and consumers," it said.
The research also highlighted the influence of ocean currents, in particular eddies, on marine heatwaves, indicating they are a major driver of subsurface events, CISRO said.
Ocean eddies can impact acidification, oxygen levels and nutrient concentrations in the ocean.
Understanding the drivers of subsurface marine heatwaves such as eddies will help to improve assessment of these events in a warming climate and help to predict them in future, it said.