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Latest info from telemetry study shows how speckled trout use Lake Pontchartrain
Posted on 3/27/14 at 3:27 pm
Posted on 3/27/14 at 3:27 pm
LINK
A speckled trout that was released in Lake Pontchartrain and recaptured nearly half a year later less than 2 miles from where it was released spent that time swimming and feeding throughout the lake.
quote:
The yellow buoys spread out across Lake Pontchartrain like giant popping corks have already detected more than half a million pings from speckled trout swimming in the lake as part of a Louisiana Department of Wildlife and Fisheries and Louisiana State University study.
LSU graduate student Ashley Melancon, who is analyzing the data, told the Northshore chapter of the Coastal Conservation Association Tuesday night that the study has already been a smashing success, even though it's far from complete.
"We've seen a 92.5 percent survival rate for the fall 2013 release group (of speckled trout)," she said. "That's pretty good given the invasive nature of the procedure and everything we put the fish through."
quote:
Researchers installed buoys and other detection devices at the major passes in eastern Lake Pontchartrain to determine when fish emigrate from the waterbody. What they found is that many of the fish left in the late spring.
Of the fish detected leaving the lake, 58 percent passed through the Rigolets, 31 percent used St. Catherine Pass and only 11 percent used Chef Pass.
Nearly 20 percent of those fish were detected coming back into the lake, Melancon said.
"That number could be larger, but because the tags only have a life of about a year, we can't determine whether or not a fish returned after the tag died," she said.
A speckled trout that was released in Lake Pontchartrain and recaptured nearly half a year later less than 2 miles from where it was released spent that time swimming and feeding throughout the lake.
This post was edited on 3/27/14 at 3:31 pm
Posted on 3/27/14 at 3:33 pm to wickowick
Interesting.
Question: how deep is Lake P?
Question: how deep is Lake P?
Posted on 3/27/14 at 3:35 pm to wickowick
Goooooooood news that is good news!!!
Posted on 3/27/14 at 3:37 pm to boom roasted
13-15' all the way across.
Posted on 3/27/14 at 3:38 pm to BRgetthenet
quote:Why
Goooooooood news that is good news!!!
Just curious. Id like to see a discussion on something good involving louisiana fisheries
Posted on 3/27/14 at 3:49 pm to wickowick
So that map shows the routes the fish took? Im not really sure how to interpret that.
Posted on 3/27/14 at 3:53 pm to TheGreat318
That's pretty cool
I think it just shows one fish they tracked for 2 years.
I think it just shows one fish they tracked for 2 years.
quote:
A speckled trout that was released in Lake Pontchartrain and recaptured nearly half a year later less than 2 miles from where it was released spent that time swimming and feeding throughout the lake.
Posted on 3/27/14 at 3:56 pm to Specktricity
Wow. Dude didnt take many scenic routes. Looks like he was running errands.
Posted on 3/27/14 at 4:43 pm to TheGreat318
Doesn't make sense to me. If the fish were released in the fall of 2013, how do they know most left by late spring? Seems they would have to wait until spring of 2014.
Posted on 3/27/14 at 4:46 pm to Nawlens Gator
There is a link in the OP that helps explain...
quote:
As part of the study, Melancon and her team surgically implant transmitters into live speckled trout before releasing them back into the lake. They tagged 40 fish in November 2012, another 39 in May 2013 and 71 last fall.
They hope to tag another 50 the week of April 21, which will be the final tagging event of the study.
Posted on 3/27/14 at 4:48 pm to wickowick
Gotcha! Thanks! Cool study.
Posted on 3/27/14 at 4:49 pm to TheGreat318
quote:
So that map shows the routes the fish took? Im not really sure how to interpret that.
I highly doubt it took straight paths like that, but the lines probably just show the straight line distance between the receivers of where the tag pinged. So, it pinged here...then it next pinged there...and here is the straight line "path" it took.
Posted on 3/27/14 at 4:51 pm to Nawlens Gator
quote:
how do they know most left by late spring?
They likely have stationary receivers in the passes that record when a tag passes by. So, if they record a lot of their tagged fish going by at a certain time, they can estimate that the fish move out in the spring. Also, there are mobile receiver units that they can use in a boat and potential track down tagged fish.
Posted on 3/27/14 at 4:56 pm to wickowick
kudos to the people doing this. fascinating stuff.
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