Best of our wild blogs: 6 Aug 18

25 Aug (Sat): Lepak with the Marine Community
Celebrating Singapore Shores!

17 Sep (Mon): Talk on "What Treasures Lie in Singapore Waters?​"
Celebrating Singapore Shores!

Butterfly Survey @ Zoo
Butterflies of Singapore

Printing, Paperwork, Pulau Ubin Outing
Wan's Ubin Journal

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Indonesia: 100 tons of fish killed in in C. Java lake fish farms

Ganug Nugroho Adi The Jakarta Post 5 Aug 18;

Over 100 tons of red and gold Nile tilapia fish being farmed in karamba (bamboo cages) in Kedung Ombo Dam, Boyolali, Central Java, have died over the past week, reportedly as a result of ammonia pollution, with a financial loss totaling Rp 2 billion (US$138,160).

“Over 100 tons of fish from hatchlings to adult fish have been killed,” fish farmer Budi Siswanto said on Sunday, noting that the fish were worth Rp 20,000 per kilogram.

The fish began to die on Wednesday, Budi said, adding that he suspected that the long drought had caused the ammonia, which was piled up from the residue of fish pellets at the bottom of the dam, to surface and pollute the water.

Wonoharjo village head Gunadi said that the farmers faced devastating losses.

“Most of the fish were ready for harvest,” he said.

Boyolali Livestock and Fishery Agency production division head Deviet Nurmaryani said the fish died as a result of “upwelling”, a vertical motion of water caused by temperature changes between the surface and the bottom of the water. The signs of upwelling are weather change, water clarity and a significant reduction in water temperature.

“Farmers must be aware of fish behavior, natural phenomena and water quality. If there are many wild fish swimming to the surface, that’s a sign that upwelling is occurring,” Diviet said.

According to Kardiyo, a fish farmer, the farmers had tried to oxygenate the water but still failed to save the fish. (stu/swd)

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Indonesia: Deadly magnitude-7 quake rocks Lombok

Tsunami warning issued after tremors shake popular tourist destination
Harriet Agerholm The Independent 5 Aug 18;

At least 82 people were killed when a powerful earthquake has struck the Indonesian island of Lombok, near Bali, killing at least three people.

The earthquake, which struck early on Sunday evening, prompted local authorities to issue a tsunami warning although the alert was later lifted.

It comes just days after another quake killed at least 16 people in the popular tourist destination.

Video showed screaming people running in panic from houses in a Bali neighbourhood and vehicles rocking. On Lombok, soldiers and other rescuers carried injured people on stretchers and carpets to an evacuation centre.

The Indonesian Agency for Meteorology, Climatology and Geophysics said the latest 7-magnitude quake struck at a depth of 15km (9.3 miles) on Sunday evening.

Najmul Akhyar, district chief of north Lombok, told MetroTV ​three people had been killed, although he was unable to assess the whole situation due to an electrical blackout.

Indonesian National Board for Disaster Management spokesperson Sutopo Purwo Nugroho said the quake was felt strongly across Lombok and Bali and had damaged houses on both islands.

The quake was felt for several seconds in Bali, where people ran out of houses, hotels and restaurants.

“All the hotel guests were running so I did too. People filled the streets,” said Michelle Lindsay, an Australian tourist.

“A lot of officials were urging people not to panic.”

Other witnesses said the quake got stronger over several seconds and rattled windows and doors in their frames.

Video captured by local stations showed patients being evacuated from a hospital in the island’s Tabanan district.

Twitter user Brad Palmer said in a post: “Not everyday you feel a level 7 earthquake hit. Currently in Bali and was sat in restaurant and suddenly the whole place started shaking and everyone fled to the streets, very scary experience.

“Have read it’s hit Lombok hard again so I hope anyone over there keeps safe.”

Another social media user, Daniel Nepstad, said: “The tsunami warning just ended here in Bali. Our children, Astrid, 5, Hendrik, 21 [months], bewildered and frightened by violent shaking, are back asleep from 7.0 earthquake in Lombok, 73 miles away.

“The sea lies 150 metres away from our house. Our bags are packed, and will remain so.”

Iwan Asmara, from the local disaster mitigation agency, said people poured out of their houses in panic and moved to higher ground, particularly in Mataram and north Lombok.

Take That singer Garry Barlow was reportedly in Lombok, while model Chrissy Teigen was on Bali, when the earthquake hit. They both reported being safe.

The United States Geological Service (USGS) said the epicentre was 2km east-southeast of Loloan, with a depth of 10.5km (6 miles).

Indonesia is prone to earthquakes due to its location on the Pacific “Ring of Fire”, an arc of volcanoes and fault lines in the Pacific Basin.

In December 2004, a massive magnitude 9.1 earthquake off Sumatra triggered a tsunami that killed 230,000 people in a dozen countries.

Associated Press contributed to this report

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