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Why are there FishKills in the Lakes |
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by Bam Azores | 26-01-2014 22:12
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There was a huge fishkill in Taal Lake in Batangas Province, Philippines last January 22, 2014. It came out in the newspaper that there was about 120 metric tons of dead fish found in the fishcages in that lake. The fish species is bangus or milkfish, which is one of the favorite food of Filipinos.
Usually a fishkill happens when there is a low level of dissolved oxygen in the lake water. This has happened several times in our seven crater lakes in San Pablo City where I live. Other possible reasons for a fishkill are algal bloom, too much fish in the fishcages, sudden change in temperatures and sometimes fish disease. In the case of the Taal Lake fishkill last week, the government said it is possibly due to high levels of sulfur in the water from the active lake. About a week ago, we had lots of huge fishes that turned up close to the shoreline of Sampaloc Lake just outside our home. The fisherfolk said that it was because the temperatures were so low that there was a turnover or inversion of the water and the fishes got confused. They swam upwards where it ended up that the dissolved oxygen level was much lower than they needed. That's the picture of the fishes below. Right now we are experiencing unusually cold weather. The past few nights we had 16 |
 
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9 Comments
Guys, check this out... http://www.globalnature.org/www.globalnature.org
Posted 02-02-2014 13:05
Feel so bad about dead fishes. This activity must be curbed.
Posted 31-01-2014 18:35
Avoidable tragedy. Feel bad for loss of fishes.
Posted 30-01-2014 18:49
Very sad... it's necessary take great actions in this area...
Posted 28-01-2014 15:14
It's sad that all those fishes die because of the cold weather and desease, however life always finds its way and hopefully in some years from now there won't be any problems
Posted 27-01-2014 23:24
algal bloom or eutrophication is also seen in Nepal lakes and here we are facing due to high levels of nitrogen and phosphorus wastes in the water. Thanks for sharing. I didn't know that sulphur could also cause this.
Posted 27-01-2014 22:36
I am sorry to see the picture. Korea has relatively warm weather these days. It's surprising to hear it's cold in Philippines...
Posted 27-01-2014 21:12
Another tragedy of climate change. So sorry for the dead fishes...
Posted 27-01-2014 10:57
Very Sad. 120 metric ton of dead fish is massive.
Posted 27-01-2014 02:41