Wednesday, January 21, 2009

Salvelinus fontinalis



Our babies are eating up to 1/2 a tsp. of the special "size 2" food a day! They always seem hungry - but we monitor the amount we allow them carefully. We have begun to notice great size differentiation among our little fry - some are more than 2.5cm and some are still only 1cm. What could be causing this?




Our theory is that most of the "swim up fry" who stay near the top of the tank are able to consume the most food. The little guys at the bottom are forced to forage through the pebbles for left overs. In short... some are greedy and some are content just waiting for the crumbs. It is basically survival of the fittest.


We will be trying to photograph this size difference today after our trip to the Eastern Planetarium!




So, you know what WE feed them... but what do you think they eat in the wild?


(the answer when we return...)

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