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Old 01-09-2003, 04:50 PM   #1
uurt
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Question

goni reproduction


One of my goni's is sporting new polyps between the bases of the existing ones. theses are much smaller but identical to the "parents". My biggest question is should I supplement calcium?
The rest of the tank is doing great, in the last 10 days I have found about 10 feather dusters that never were there before on 1 piece of rock that I have had for about 8 months. These are the only dusters in the tank. Also found a couple of monster bristle worms. 1/4"+ in diameter and 4-6 in lentgh. Even my nano has one this size - and that's only 1 gal.
So any help with goni reproduction will help.
Thanks, Lee
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Old 01-09-2003, 05:37 PM   #2
dark horge
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Hi ya uurt

New polyps on a colonial animal might better be descruibed as growth, rather than reproduction --the latter in Goniopora's case involving either sexual broadcast (the polyps releasing stuff into the water), or asexual 'fragmentation' which involves the mother colony developing globular bumps of skeleton covered with live tissue that eventually separate from the parent as 'polyp balls'.

Gonio's are a tricky animal to be keeping --their nutritional requirements are poorly undrstood, and so we have many, many reports of specimens doing fine for several months, then suddenly dying, with all symptoms pointing to malutrition.

The few analyses of Gonio polyp gut contents suggest it chows on both zooplankton and phytoplankton, with the former including tunicate, ascidian, even sponge larvae. A refugium designed and stocked to regularly produce such bounty would probably help. If your live rock is biodiverse and remains so, that might be enough.

But keep in mind, the odds are HEAVILY against successful husbandry exceeding 6 months. To others thinking about purchasing a stony coral, until Goniopora's dietary and metabolic requirements are better understood, I'd recommend trying other coral species instead.


hth
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Old 01-09-2003, 06:46 PM   #3
uurt
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Thumbs up

Thanks Horge. I'm pretty sure that this is an asexual budding, with the new polyps at the base of the more mature ones. It hasn't withdrawn all the way in a few weeks so I can't see the stony part to see what it is doing. Just wondering if I should sup some calcium, maybe give it a little extra building material in the water?

Lee
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Old 01-13-2003, 08:12 PM   #4
dark horge
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I don't really see a need for boosting calcium, as long as your ca levels are acceptable. Some of the longest-surviving Gonio's I've seen were kept in Calcium levels around 340.

The downside to boosting Ca levels is pH shock to the coral. If you're going to do it, go slowly.

Nutritional issues ought to be your main concern, and in that light, a calcium-boost pH-spike can bring tragically serious whup-butt unto the sort of microorganisms that Gonio's can feed on.


hth

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bristle worm , feather duster , feather dusters , mother colony , stony coral



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