I have a 300-gallon tank by barn with some longear and bluegill in it. Tank is about 36" deep. Each night the sunfish come up to sleep on ledge just below surface. During the day they are not to be seen. Will be watching for roosting site fidelity. Individuals can be discerned by patterns and size.
Roosting Behavior in Sunfish
#1
Posted 06 May 2018 - 07:32 AM
#2
Posted 06 May 2018 - 08:30 AM
Maybe related to dissolved oxygen stratification? Hard to get a good nights sleep if you can't breathe.
Gerald Pottern
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Hangin' on the Neuse
"Taxonomy is the diaper used to organize the mess of evolution into discrete packages" - M.Sandel
#3
Posted 06 May 2018 - 05:23 PM
maybe predator avoidance specific location? would they fear herons more in the day... most wading predators seem to actively "look into the water". on the other hand, large catfish prowl around at night, so shallow water helps you avoid bigger fish? At least that's my hypothesis,
#4
Posted 06 May 2018 - 07:09 PM
Cool observations. Thanks for sharing, and keep us updated. Photos would be cool.
#5
Posted 07 May 2018 - 03:42 PM
maybe predator avoidance specific location? would they fear herons more in the day... most wading predators seem to actively "look into the water". on the other hand, large catfish prowl around at night, so shallow water helps you avoid bigger fish? At least that's my hypothesis,
This is pretty much what I think. I have a hypothesis too, but it would take a while and pretty much leads to what Michael said. It makes sense to me.
The member formerly known as Skipjack
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