Author Topic: MCMAC Presentation: James Fatheree - Tridacnid Clams: Feeding & Lighting  (Read 1988 times)

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Offline psa

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Tridacnid Clams: Feeding & Lighting

These clams get all of their energy needs from their zooxanthellae which they receive by filter feeding.
It's not clear that they need to filter feed anything else.
When they do filter feed, they eat everything from detritus and microsand to zooplankton and phytoplankton.

"Detritus is very nutritious.  It's got all kinds of good stuff in it."

They can get much of their chemical nutrient needs (nitrogen, phosphorus, etc.) directly from seawater.

They can also digest their own zooxanthellae for additional nutrients and energy.

99.9% of the time nothing needs to be fed to the clams.  Feeding your fish also feeds the clams further down the food chain.

All clams need different amount of light, both between species, but also between members of the same species.
crocea needs a lot of light (less than 10' of water)
maxima (less than 20' of water)
derasa can live much deeper, but they are still diverse in their light needs

Color does not correlate to the amount of light a clam needs.

Bright halides are the best bet for most clams.  Clam lighting requirements vary considerably between individuals, but anything dimmer is a gamble, and what works for one individual may be insufficient for another.
« Last Edit: July 20, 2009, 02:10:32 AM by psa »
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