watching how our giant fry grow and how the bigger ones started to chase the small ones (and sadly sometimes they managed to catch up and eat them) has made me realize the meaning "survival of the fittest".
most tanks are the result of 2 spawns in our place. we spawn them first time, once the fry hatched and free swimming (day 2 or 3), we released another sibling female in the tank, which usually resulted in another spawn the day after release. Even with only 2 spawns, it is so apparent how aggressive the first batch is....by the time the 2nd batch is free swimming, the first batch already started to eat BBS. only a matter of couple of days before they go very hungry and started to chase the 2nd batch fry. perhaps that's because giant grows very fast?
anyway, usually only half of 2nd batch fry can survive at later stage, that's discounting any other events that may happen during their growing up....
another thing that also amazes me....there are times when i saw the father chase and eat the 1st batch fry!! i think he got pissed off when the larger fry started to it its much smaller sibling, so he chased the larger fry and kill it....that's how cruel life is!!! it's just to show how the father wants to make sure that the larger fry does not pose any danger to his other fry....
Sunday 17 February 2008
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