What causes snail die off? - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 07-09-2007, 12:25 PM Thread Starter
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What causes snail die off?

And it is mostly ramshorns. They seem to grow to a certain point have a population exposion then all of a sudden die out (esp. the larger ones). This is terrible for the water (fouling) and is another reason I pull out the ramshorns. Do they have a life expectancy? Seems like the pond snails have an even shorter one while the bigger snails like the nerite and apples have a little longer?

Is it this or does something else cause the die out?

Tina
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post #2 of 2 (permalink) Old 07-09-2007, 12:30 PM Thread Starter
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OK, found a partial answer on applesnail.net that water temps may have something to do with it, but this also happened in my cooler tank too:

http://www.applesnail.net/content/faq.php#18

How old do apple snails get?
The apple snail's life expectancy mainly depends on the temperature of their environment and the general life conditions. At lower temperatures, the apple snail can get over 3 years old and records of apple snails of ten years old have been reported. Lanistes nyassanus has an estimated life span of 5 to 10 years in Lake Malawi, Africa.
At a temperature of 25C, they will only live 12-16 months. At higher temperatures, the snails are more active because their metabolism increases with the temperature, but this also speeds up their life cycle and thus shortens their life expectancy.
So you can elongate your snail's life by lowering the temperature. A general rule: keep the temperature between 18 and 28C (65-82F).
It is suspected that at least some apple snail species need an aestivation period in the mud to avoid burning-out.
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