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Author Topic: Tagged blue crabs in Gulf of Mexico  (Read 3699 times)
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GulfCrabs
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« on: April 17, 2016, 01:43:55 PM »

I posted this in the science discussion, but thought it might get more visibility here.

I am a researcher with Nicholls State University. We are conducting a research project to better understand blue crab movements throughout the Gulf of Mexico. Over the next two years, we will be tagging 30,000 mature female blue crabs throughout the Gulf. I am attaching a picture of a tagged crab, along with a flyer we are distributing to maximize awareness of the project.

We are reaching out to the commercial and recreational fishing community to ask for your help. If you catch a tagged crab, please call us and report it. We are offering a reward for each tagged crab reported, and are asking for the following information:
-Tag number
-Date caught
-Location caught (GPS if possible, if not a descriptive location with the nearest landmark is fine)
-Was the crab carrying an egg mass/sponge? If so, what color was the egg mass (orange, brown, or black)?

Tagged crabs can be reported at 1-800-624-2857 or www.crabtags.org.

If you have any questions about the project, please do not hesitate to ask. We are also setting up a website with information about the project: http://www.nicholls.edu/bluecrabs. It is still under construction but should have more information soon.
« Last Edit: April 18, 2016, 09:09:09 PM by GulfCrabs » Logged
riverpop
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« Reply #1 on: April 17, 2016, 09:53:14 PM »

tagging 375 bushels.
« Last Edit: April 17, 2016, 10:24:50 PM by riverpop » Logged

riverpop (gary B.)
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« Reply #2 on: April 17, 2016, 10:59:58 PM »

Will you be posting data /results here?
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GulfCrabs
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« Reply #3 on: April 18, 2016, 08:49:18 AM »

Will you be posting data /results here?
Yes, I can share results here once w get a bit farther along in the study. We'll also be updating the website with results once we get a few more crabs tagged.
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« Reply #4 on: April 18, 2016, 08:55:39 AM »

Yes, I can share results here once w get a bit farther along in the study. We'll also be updating the website with results once we get a few more crabs tagged.

Thanks.   Looking forward to the data.
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capt. ron
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« Reply #5 on: April 18, 2016, 04:06:19 PM »

Were the tagged crabs only released in the gulf or other lakes and bays?  Lake Pontchartrain,  Terrebonne Bay,  Sabine lake.  What/Which zones? (1-2-3) Parishes?

Ronnie
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GulfCrabs
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« Reply #6 on: April 18, 2016, 09:08:44 PM »

Were the tagged crabs only released in the gulf or other lakes and bays?  Lake Pontchartrain,  Terrebonne Bay,  Sabine lake.  What/Which zones? (1-2-3) Parishes?

Ronnie

We are tagging in every bay system and estuary from Lower Laguna Madre, TX to Apalachicola Bay, FL, as well as in the Gulf itself.


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« Reply #7 on: April 18, 2016, 09:10:11 PM »

about how many crabs are being tagged?
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GulfCrabs
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« Reply #8 on: April 18, 2016, 09:13:28 PM »

about how many crabs are being tagged?
Approximately 30,000. We aren't distributing the tags equally across all estuaries or across the 5 states, though. At least 12,000 will be tagged in Louisiana, with the remainder divided between the other Gulf states based on the length of the coastline, crab landings, and several other factors.
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« Reply #9 on: April 19, 2016, 08:15:24 AM »

Won't the crabs lose the tags when the female crab molts and loses the old shell?
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« Reply #10 on: April 19, 2016, 09:16:51 AM »

it's on their FAQ.  I will repost here:
Frequently Asked Questions:
Q: Where are the crabs being tagged?

A: We are tagging crabs throughout all five Gulf Coast states.

 

Q: Won’t the crabs lose the tags when they molt?

A: We are only tagging mature female blue crabs. Female blue crabs molt many times through their life, but once mature they stop molting. By only tagging mature females, we are ensuring that we are only tagging crabs that will not molt.

 

Q: What information do I need to report if I catch a tagged crab?

A: Please record the tag number (B04738 on the crab shown above), the date you caught it, the location where it was caught (GPS if possible, or a descriptive location with the nearest landmark), and whether or not the crab was carrying eggs (also called a sponge). If it is carrying eggs, please record whether the eggs were orange, brown, or black. This information tells us the developmental stage of the eggs.
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GulfCrabs
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« Reply #11 on: March 02, 2017, 03:39:07 PM »

Hello everyone- I just wanted to post a quick message letting everyone know that this blue crab tagging study is continuing in 2017. We've tagged over 6,000 crabs so far and will be tagging in all five Gulf States for at least the next year. Our research group has moved to the University of Southern Mississippi, based at the Gulf Coast Research Lab. For more information on the project, please visit www.crabtags.org or https://bluecrab.usm.edu. If you catch one of our tagged crabs, please report it by calling 1-800-624-2857 or online at www.crabtags.org.

We are also looking for commercial crabbers in Mississippi, Alabama, and the Florida Panhandle to help us tag crabs. We typically send one of our graduate students out with a commercial crabber to tag. We do not ask the crabbers to alter where or how they fish. The graduate student will ride along and will only tag females. We will compensate you for any crabs that we tag and release. If interested, please send me a message, or email us at [email protected].
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« Reply #12 on: March 03, 2017, 09:07:37 AM »

This sounds like a very interesting study! A bit labor intensive with a projected 35,000 crabs being tagged but with that number you should get back great data! I will be following this one closely! Maryland has performed similar studies and know where the crabs migrate, both males and females, throughout the year.
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