Hypothetical Questions about Breeding

This area is dedicated to the pioneers who have captive bred crabs, and for those who wish to learn more or attempt it themselves. Also for inquiring about the gender of your crabs.
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DreaminginBlue_2
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Hypothetical Questions about Breeding

Post by DreaminginBlue_2 » Sat Sep 23, 2017 11:52 am

Though currently I don't have the have the time or funds to join the incredibly dedicated and wonderful people who have worked on advancing our knowledge of captive breeding, I had some hypothetical questions (just in case someday I am in a place where I can help.)
1) I know most have used Kreisel tanks and jars, but these are small and need frequent water changes. I wondered, what if one was to get a very large aquarium and set it up in a way to mimic the ocean? It'd be cycled with filtration, and the large volume would mean fewer water changes. I imagine it'd have sand on the bottom and there'd have to be some way to mimic the current. Perhaps if it was set up just right, a culture of live plankton could be used to feed the crabs. Then they'd be moved to a shore-like transition pool (as all the breeding attempts I've seen have used) when they're ready to move to land.
2) Is there any large organization or museum or something that might be interested in helping us research/learn about captive breeding? I know of many very wealthy intistutions (like, the California Academy of Sciences) that have the funding and the resources to conduct research. A team of biologists and scientists might be able to figure out a more reliable method to raise zoeae. Many such places value conservation and the furthering of knowledge, so maybe writing them a letter might be worth a try?
3) Has anyone ever bred/raised C. compressus? I know aussies have been raised and E's are similar to aussies, but I wondered if work with this particular species hasn't been done, someday I can try to get them to breed.
These are just ideas that came to me, they might be comepletely useless but I wondered.

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wodesorel
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Re: Hypothetical Questions about Breeding

Post by wodesorel » Sat Sep 23, 2017 12:19 pm

Kreisel tanks work because there is no mechanical filtration and the design keeps zoea from catching on anything. They are so tiny and they can only drift, so they will get sucked into any kind of filtration or pump system. This is also why large marine tanks don't have plankton colonies, because they are impossible to keep alive while still filtering and moving water for everything else.

They are not endangered so I doubt anyone would be interested in anything large scale yet. There have been several papers on lab rearing coenobita, however they have all been with wild gravid females.

There are a few of us who have had Es reproduce in captivity. The first lab reared zoea were Es since they have an abbreviated larval stage. To my knowledge no one has yet gotten captive bred Es to land though from start to finish.


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DreaminginBlue_2
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Re: Hypothetical Questions about Breeding

Post by DreaminginBlue_2 » Sat Sep 23, 2017 12:33 pm

Thanks wodesorel. :)
Maybe someday I can give E's a try.

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Renroc
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Re: Hypothetical Questions about Breeding

Post by Renroc » Fri Oct 06, 2017 4:47 pm

wodesorel wrote:
There are a few of us who have had Es reproduce in captivity. The first lab reared zoea were Es since they have an abbreviated larval stage. To my knowledge no one has yet gotten captive bred Es to land though from start to finish.
Hi, you said that Es have an abbreviated larval stage. Is it as short as our Aussies? We have 10-12 days in 5 steps. I’m asking purely for interest as I will never get the opportunity to experiment with them. Image


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Crazy crab lady with 3 babies raised in captivity. One female on male and one unknown. Also 4 adults. 2 males 1 female and 1 unknown.
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wodesorel
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Re: Hypothetical Questions about Breeding

Post by wodesorel » Fri Oct 06, 2017 6:06 pm

They take a bit longer at 21 to 33 days in four to five steps:
https://academic.oup.com/jcb/article/21/3/715/2679817

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Renroc
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Re: Hypothetical Questions about Breeding

Post by Renroc » Fri Oct 06, 2017 6:32 pm

wodesorel wrote:They take a bit longer at 21 to 33 days in four to five steps:
https://academic.oup.com/jcb/article/21/3/715/2679817
So how long are the others? 40 days I seem to recall.


Sent from my iPhone using Tapatalk
Crazy crab lady with 3 babies raised in captivity. One female on male and one unknown. Also 4 adults. 2 males 1 female and 1 unknown.
Hoping for more babies this season.

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