What happens to the fish?
There are many ways the acidification of lakes, rivers and streams harm fish. Mass fish mortalities occur (during the spring snow melt which never happen in MALAYSIA) when highly acidic pollutants-that have built up in the snow over the winter-begin to drain into common waterways. Such happenings have been well documented for salmon and trout in Norway.
More often, fish gradually disappear from these waterways as their environment slowly becomes intolerable. Some kinds of fish such as smallmouth bass, walleye, brook trout and salmon, are more sensitive to acidity than others and tend to disappear first.
Even those species that appear to be surviving may be suffering from acid stress in a number of different ways. One of the first signs of acid stress is the failure of females to spawn. Sometimes, even if the female is successful in spawning the hatchlings or fry are unable to survive in the highly acidic waters. This explains why some acidic lakes only have older fish in them. A good catch of adult fish in such a lake could mislead an angler into thinking that all is well.
Other effects of acidified lakes on fish include: decreased growth, inability to regulate their own body chemistry, reduced egg deposition, deformities in young fish and increased susceptibility to naturally occurring diseases.
After all the boring details, i would like to end this post by share my knowledge with all viewers. When fishes suffer, we suffer as well. Not long ago, Japanese encounter health problem. The cause of the sickness is the raw fish they ate were clean. Inside the fish they found substances like sulphate, mercury and etc.
Sad. can u imagine the days without sashimi? OMG~
