High temps & drought cause massive fish die-off
High temps & drought cause massive fish die-off
This is the last thing the ecosystm needs. Bring on the rains!
http://www.phnompenhpost.com/national/t ... mpong-thomTonnes of fish killed by heat in Kampong Thom
Mon, 25 April 2016
Niem Chheng and Sen David
Record-breaking temperatures and drought are wreaking havoc across the Kingdom as officials yesterday reported the die-off of an estimated 65 tonnes of fish in Kampong Thom’s Tonle Chhmar protected area and warned the entire fish population of the lake may perish.
According to Nao Thuok, secretary-general of the Ministry of Agriculture, low water levels and high temperatures are now posing an existential threat to the fish population and measures are being taken to try and protect those left alive.
“Now, we are preparing temporary shelter. We bring water hyacinths from a nearby lake to spread on the [Tonle Chhmar] lake to make the water not so hot,” Thuok said.
“In 10 or 15 days, if there is no rainfall, all the fish will die.”
Established as a protected area in 2012, Tonle Chhmar has seen as many as 100 tonnes of fish die from storms, but not hot weather, Thuok said.
Water levels are at 0.15 to 0.2 metres, but they should be around 0.5 metres, Thuok explained, adding that the Tonle Chhmar Lake, which is usually connected to the Tonle Sap lake, is currently separated by 5 kilometres of dry land due to a poor rainy season and this year’s drought conditions.
Phann Phan, chief of Peam Bang commune, said authorities working with the community had brought in 20 boatloads of hyacinth, enough to cover 1 hectare of the lake.
According to Phan, Tonle Chhmar can cover 8,325 hectares at the peak of the rainy season, but currently it’s at about 20 per cent of that surface area.
Stoung District Governor Prim Ratha says the dead fish are mostly small, the kind used to make prahok. Yesterday, he said 200 boatloads were removed from the lake.
On Friday, Prime Minister HE took to Facebook to urge citizens to conserve water and announce his order to the Ministry of Economy and Finance to allocate money to the National Committee for Disaster Management (NCDM) and Ministry of Water Resources and Meteorology for drought relief in the 18 provinces currently affected.
NCDM spokesman Keo Vy yesterday said the NCDM’s vice president, Nhim Vanda, was currently working with the Finance Ministry to determine what funds were needed.
“We have some water for farming because we still have water in reservoirs, but the water for usage by humans and cattle is in shortage,” he said.
Meanwhile in Stung Treng’s Siem Pang district, Ly Nak, 26, said that in the past week, some 10 cattle died in Thmarda village, and residents are concerned more will die in the coming days.
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Re: High temps & drought cause massive fish die-off
state of emergency
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- bolueeleh
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Re: High temps & drought cause massive fish die-off
the fish didnt die of because of the water getting too hot, the fishes died because the water level is low and there isnt enough oxygen, jeeeeez zuuuus
Money is not the problem, the problem is no money
Re: High temps & drought cause massive fish die-off
Where did you go to school? The higher the water temp, the less oxygen the water holds. Derrrr...........bolueeleh wrote:the fish didnt die of because of the water getting too hot, the fishes died because the water level is low and there isnt enough oxygen, jeeeeez zuuuus
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Re: High temps & drought cause massive fish die-off
do you know how much energy it takes to heat up a body of water untils it gives up its oxygen molecules?Rutiger wrote:Where did you go to school? The higher the water temp, the less oxygen the water holds. Derrrr...........bolueeleh wrote:the fish didnt die of because of the water getting too hot, the fishes died because the water level is low and there isnt enough oxygen, jeeeeez zuuuus
what im saying is that the heat of the water is not the main cause of fish dying, the low level of water and insufficient amount of oxygen is the main cause.
Money is not the problem, the problem is no money
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Re: High temps & drought cause massive fish die-off
wait let me rephrase that again, it is not the direct heat that causes the fish to die or the direct heat on water that causes the oxygen molecules to separate from water molecules,
it is the heat that causes so much evaporation that water level is so low, that there isnt enough oxygen in the water that cause the fish to die
it is the heat that causes so much evaporation that water level is so low, that there isnt enough oxygen in the water that cause the fish to die
Money is not the problem, the problem is no money
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