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Author Topic: Blue Crabs Trapped in Brackish Pond ?  (Read 33942 times)
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caledonn65
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« on: July 06, 2016, 02:16:14 PM »

There's a pond in MA that is opened to the sea every 5 or 10 years. It's closed in between. There's reported blue crab in there. My question to those that know the science of it is:  what happens to the female fertilized crabs in a trapped pond scenario?  Where they can't go out to sea to lay their baby crabs ie; zooea?

Will they let them loose in the pond?

I'm curious if the survival rate would then be much higher in the closed eco system than in an open ocean trek, and result in a robust population of crabs in such a pond?

Thanks!
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crewstation
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« Reply #1 on: July 06, 2016, 03:37:13 PM »

I think I know a way to find out!  Chicken necks!   Grin
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IHazCrabz
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« Reply #2 on: July 06, 2016, 03:38:34 PM »

There are probably at least a dozen theories as to what can happen if there is are female fertilized crabs in that pond.
I think the best way for you to find out is drop a trap in there and see if there is anything  laugh laugh laugh
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« Reply #3 on: July 06, 2016, 03:47:00 PM »

Go for it
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« Reply #4 on: July 06, 2016, 03:53:55 PM »

Hatching of blue crab eggs occurs at salinities of 23-33 ppt
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caledonn65
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« Reply #5 on: July 07, 2016, 11:53:48 AM »

So without that salinity, crabs would age and die in no more than 4 years due to old age?  Not being able to reproduce?
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« Reply #6 on: July 12, 2016, 11:30:50 PM »

Maybe they absorb their eggs into their bodies like landlocked rockfish.
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« Reply #7 on: July 22, 2016, 09:29:11 AM »

I bet those things will end up being huge crabs....
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« Reply #8 on: July 22, 2016, 05:58:35 PM »

it's not possible for the fry to grow in such a pond - even if the salinity was raised, there is a real problem of cannibalization.  

In terms of reproduction - i think the tides /moon may have an impact on having the crabs reproduce.

In a pond - with no water movement - it may be that the crabs simply don't reproduce, but that's completely a wild guess on my part.
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samiam
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« Reply #9 on: July 23, 2016, 06:57:52 AM »

Yer gonna need a bigger pot...
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Neither Crab
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« Reply #10 on: October 05, 2016, 05:11:57 AM »

I bet those things will end up being huge crabs....
I got 3 bushels of Crabs once years ago from   Lake Mattamuskeet NC. They counted out at 36-37-38 Crabs per.well  packed Bushel. They were all huge males and steamed u well but they had a bland flavor from the fresh water. Commercial crabbers weren't allowed  to crab there and they grew very big from the small amount of crabbing pressure at that time. From what I've read and heard, those big crabs are scarce in there today.
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flounderpounder
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« Reply #11 on: October 07, 2016, 09:40:42 AM »

I got 3 bushels of Crabs once years ago from   Lake Mattamuskeet NC. They counted out at 36-37-38 Crabs per.well  packed Bushel. They were all huge males and steamed u well but they had a bland flavor from the fresh water. Commercial crabbers weren't allowed  to crab there and they grew very big from the small amount of crabbing pressure at that time. From what I've read and heard, those big crabs are scarce in there today.

Isnt the legal limit a doz per person in that Lake?

Crabs slough more in an area with low salinity. Hence bigger crabs are found in fresher water.
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« Reply #12 on: October 07, 2016, 06:24:43 PM »

Isnt the legal limit a doz per person in that Lake?      ""That was 30 years ago. I don't know if they had any laws back then on limits.""  It might have been a bushel or two  per person. I didn't catch them.

Crabs slough more in an area with low salinity. Hence bigger crabs are found in fresher water.
[/quote  " You're right. That's why the upper Chesapeake has larger crabs and the lower Chesapeake and the seaside has smaller crabs."".
« Last Edit: October 07, 2016, 07:17:51 PM by Neither Crab » Logged

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