Tagged dhu recapture
Submitted by scottnofish on Mon, 2014-09-15 07:38
Went out Saturday morning in our local fishing comp Picked a few underside Dhuies up and a few kgs . Also got my first recapture of a tagged Dhuie was only 38 cm yet to find out the old details yet had a fair bit of growth on the tag so might have been a while since it was tagged have to check my records when my bro gets back from exmouth
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Geoff78
Posts: 324
Date Joined: 05/03/13
It's pleasing to see a young
It's pleasing to see a young dhuie survive release.
scottnofish
Posts: 1621
Date Joined: 28/08/07
Yeh he swam off
The release weight no problems
tim-o
Posts: 4657
Date Joined: 24/05/11
What depth was he in? Like
What depth was he in? Like Geoff, pleased to see the tiddlers survive
I am, as I've said, merely competent. But in an age of incompetence, that makes me extraordinary.
scottnofish
Posts: 1621
Date Joined: 28/08/07
Came up slowly from
37 m gave him a decompression stop at 10 m and he came up fine. No swim bladder swelling or anything
meglodon
Posts: 5981
Date Joined: 17/06/10
Well done
It will be interesting to see how much it has grown since tagged. Very good to see the product of using a release weight.
Andy Mac
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Date Joined: 03/02/06
Well done
awesome feeling to know they are surviving when released.
Cheers
Andy Mac (Fishwrecked Reeltime Editor & Forum Moderator)
Youngest member of the Fishwrecked Old Farts Club
hezzy
Posts: 1521
Date Joined: 27/11/09
while it is good to see one
while it is good to see one that has survived the first recapture & hopefully will survive this re entry
I think people need to not read too much into the ones that do get recaptured and beware a growing perception its all ok to catch and release dhuies like snapper
survival rates are still highly variable and heavily dependant on the individual treatment of each fish ,
the science on dhufish is still showing them to be a fish highly susceptible to death from catch and release , of course release done well is better than nothing
they may look ok , but many will die once released , id just caution peeps to think about moving on once they have got their limit etc etc ... target something else
while not comparable as species , my son recently caught 6 trout from his aquaponics tank , all survived the release, , he also hooked one of his silver perch accidently , it was released the same , all looked ok , 4 days later it floated ,dead,
while their not comparable , fact is he thought it was all good , but it took a few days to die , he found it as it was in the tank , at sea , you will never always know the result , no mater how good you are many will still die
so just asking peeps to think about it , move on if you can hey , and all credit to those who do the best effort releasing dhuies
hezzy
OFW 11
evil flourishes when good men do nothing
Andy Mac
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Date Joined: 03/02/06
Nobody is advocating catch and release like snapper
You are dead right that we cannot treat dhuies like we do the humble snapper as they are far less hardy a fish,but I certainly do think that from my own experiences and those of other taggers that there is a very high recapture rate if you take care of the fish on the way up and or on the way down.
The 5 or 10m deco stop I swear by, and I have been doing this for many many years (video's on here from years back). You can watch the dhuie gradually equalize the pressure by releasing air from its swim bladder. The bubbles are easily visible.
Having said that when I go back over my notes several fish that have been caught by my many and varied deckies over the years that come to the surface a bit too fast and bug eyed have since been recaptured, so the shotline treatment also gets a big thumbs up if the fish hasn' had its deco stop and is looking a little worse for wear.
Education is the key and maybe some of the tv fisho's need to do a bit of a story on this (although its pretty hard to bank on recapturing a tagged fish on camera.) Tell that to my deckie from Sunday though who had never in his life caught a dhuie. First drop on one of my spots and he nails one of my tagged fish.
Totally agree with the move on or downsize hooks once you bag out theory. There is no point in Dhuie fishing once you have your bag.
Cheers
Andy Mac (Fishwrecked Reeltime Editor & Forum Moderator)
Youngest member of the Fishwrecked Old Farts Club
tim-o
Posts: 4657
Date Joined: 24/05/11
Yep, when it aint big, I
Yep, when it aint big, I bring it up slow, and when bagged out, I move on
I am, as I've said, merely competent. But in an age of incompetence, that makes me extraordinary.
Geoff78
Posts: 324
Date Joined: 05/03/13
How long do you allow for a
How long do you allow for a decompression stop?
Andy Mac
Posts: 4778
Date Joined: 03/02/06
Till they stop releasing bubbles
its not long and the reality is that if you know it is undersize and it just happed to jump off the hook boatside whilst decompressing it will swim down unaided.
Cheers
Andy Mac (Fishwrecked Reeltime Editor & Forum Moderator)
Youngest member of the Fishwrecked Old Farts Club
Michael Yoni
Posts: 603
Date Joined: 02/01/11
What is the success rate
What is the success rate when compared to the use of the release weight.
Andy Mac
Posts: 4778
Date Joined: 03/02/06
very hard to determine accurately
Unless you do a program based on 50% release weight and 50% simple release and measure recapture rates. Previous studies suggest that a release weight is a better option in all circumstances, but my own recaptures of simple released fish suggests if its a healthy fish and treated well when released, they can survive, but then again not everyone will do a deco stop, so its always best to use the weight, thats why you have to have one by law.
I would use a weight maybe 80% of the time so my recaptures between release weight fish versus simple release fish are similarly weighted accordingly. I would have to dig up the the old data sheets to give a more accurate account.
Cheers
Andy Mac (Fishwrecked Reeltime Editor & Forum Moderator)
Youngest member of the Fishwrecked Old Farts Club
little johnny
Posts: 5353
Date Joined: 04/12/11
clip dive leads
onto line (using shark clip) prior to them hitting surface for 5 mins, at 5 to 10 meters ,they all swim away no problem at all,,,deco time
scottnofish
Posts: 1621
Date Joined: 28/08/07
I always use a release weight
It's just sometimes they fall off the weight at the surface and usually swim off by themself.should be a good show coming up soon with Paul and Jody doing tagging with Steve coria
little johnny
Posts: 5353
Date Joined: 04/12/11
try realease
lead on 10 to 15 kg dhue,,trust me it doesn't work ,up to individual ,big fish doesn't work , and sometimes not all times you can not help pulling your limit in 1 drop,(not being smart ass) release lead works 100% on small fish ,what about the big girls or boys,without puncturing bladder ??? no go in my books ,caught fair few tagged dhues in my life, never got 1 over 5 kg with tag ,,,why unsure??pinks plenty with tags, crays plenty with tags ,dhues always small ?? dive lead never fails . but we still have to carry a gay release lead. I still carry 1 by law .but I never use it, my dive leads heaps more effective.99% of people who fish will know this fact ,pretty sure less than 50% off dhues let go die,(in deep water) with release led ,open for attack more than welcome,dhues are like us stop them from getting deco sickness more chance in them living ,by the way no greenie by any means ,I would like my grand kids to catch them 1 day.
scottnofish
Posts: 1621
Date Joined: 28/08/07
you aint seen my release weight jonny
its a 3 kilo lump of round bar and has sucsesfully released 15 kilo dhuies back down to the bottom no worries
you might find you havnt caught many big dhuies with tags in down in rocko as there is only a couple of us tagging dhuies down there and i know i havnt tagged any big ones down here ,they usually end up in the esky ,you may get a few around two rocks or leeman as thats were most of our taggin has been done but in general i mostly only tag fish under 5 kilo bigger than that they are coming home with me
NOHA
Posts: 914
Date Joined: 24/06/07
15kg dhu out from rocko
There is at least one 15kg dhu tagged out from Rocko
http://fishwrecked.com/image/94cm-dhu-tagged-and-released
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scottnofish
Posts: 1621
Date Joined: 28/08/07
Forgot about that one
maybe because i wasn't there for that one
Geoff78
Posts: 324
Date Joined: 05/03/13
Excellent info thanks guys.
Excellent info thanks guys.
NOHA
Posts: 914
Date Joined: 24/06/07
Dhu tag number 67622
Caught 17/11/13
33cm released in good condition, from the kg spot Neil
So its grown 5 cm and hasnt moved very far at all, or has it returned to the same place a its nearly a year?
I have found a large variance in fish condition when brought to the surface. Taking it slow with a deco stop is definately the best for the fish. Shade its eye because it dosnt have eyelids and staring at the sun lying on the deck cannot be good for the fish either. I have pulled four similar size fish from the same patch in 35 meters and three where so good they swam off unassisted, but one had blown bag and bugged eyeballs full of bubbles. Why just that one I dont know, all fish came up the same way, I guess that fish was more susceptable. It still got a tagged and put back down as there is evidence of fish that bad being recaptured so they do survive that level of trauma.
I have also released a very small 32cm fish from 110 meters fishing the wrecks for mullaway that came up in great condition. It jumped off the release hook at the side of the boat and swam down itself.
Twin turbo..V8 diesel..Ohh what a feeling!!
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scottnofish
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Date Joined: 28/08/07
check this video out
https://www.youtube.com/watch?v=faFlaHPsL0s
allrounder
Posts: 1853
Date Joined: 10/11/08
The first round of tagging
The first round of tagging was to determine the difference in releasing techniques and survival rates. It determined that the release weights and correct handling saved fish. This round is to find out if we where to efficient at releases or if we got lucky. Treat the fish well and it stands a far better than average chance of getting bigger. They don't move very far at all so move though your ground and avoid wiping out family group s
So tell me have you got your info from years on the water or hours on the internet?