Tagging Recapture

Tagging Recapture

I have been tagging fish for ORI (the Oceanic Research Institute of South Africa) since 2008. During this time I had one of my tagged fish recaptured (and killed, a galjoen tagged at Blombos and killed at Jongensfontein).

Recently I had the privilege of catching a kob tagged by someoneĀ  else. Since it was dark I had difficulty reading the number on the tag (it was overgrown with weed). Luckily I remembered that there are two number on each tag, one at the bottom and on on top. So after nipping of the top cm of the tag and a few pics, the fish was released again (with the bottom number still intact).

The fish was free for 1025 days and was re-captured 57km from where it was originally tagged. It measured 446mm when it was tagged and grew 214mm until I re-captured it at 660mm.

Re-captured tagged dusky kob
Re-captured tagged dusky kob

It was tagged by the Department of Enviromental Affairs (Oceans and Coasts) at Koppie Alleen in the De Hoop nature reserve and I caught it again in the surf at Struisbaai.

It took a silicone mullet on an intermediate line.

8 thoughts on “Tagging Recapture”

  1. Yes, it’s a pity. Kob hardly ever gets released due to being rated as a table fish. It’s a mentality that will have to change.

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  2. Conrad,I am very keen on trying for Cob when next I visit our holiday home at Cape st Francis as I believe there are a few spots this can be done do you fish mostly with an intermediate and short leader in the surf and is your favorite color still olive over white?

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  3. Hi Marius

    I mostly fish with an intermediate line, especially when fishing off the rocks. When fishing the surf from the beach (no rocks) I often swith to a sinking line to get the fly down, especially if there is a current running.

    I prefer olive over white, but also use a range of other natural colours such as tan, grey and brown. Colour is not that important, I recommend you fish a colour that you have confidence in.

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  4. Interesting info. And with my basic calculations – if the tag return details were correct – is that the fish can grow about 30cm per year(given that it was still a young fish) and also that it remained in the same area it was tagged in. So it seems that Kob are relatively fast growing, contrarily to what I thought… But not at the rate of dorado at 100cm pa…
    Pity it did not swim away again though. Tight lines!

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  5. That is weird to have grown so little. Maybe your measuring tape is stretched or the second guy who caught it has a measuring tape that shrunk šŸ˜‰ .

    Reply

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