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Subject: Re: Tagging Flounder
From: Filip Ribeiro <[log in to unmask]>
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Sat, 22 Aug 2015 09:46:14 +0100
Content-Type:text/plain
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Contact Mark Henderson former student com VIMS he might help you.
Cheers
Em 21/08/2015 20:40, "Morgan Hart" <[log in to unmask]> escreveu:

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>
> Hello everyone,
>
> This is my first Fish-Sci post.
>
> The basis of my master’s project is to track the movement and survival of
> Southern Flounder (Paralichthys lethostigma) using Vemco V-9 acoustic
> transmitters (9 X 29 mm).
>
> Other published tracking studies have tagged flatfish by attaching devices
> either internally (surgical implant) or externally (pins through the body
> musculature). I have performed several tank trials at ambient (29-30 oC)
> water temperatures and have had fairly poor survival using both methods.
> The literature on tagging flounder, especially in warmer waters, is sparse.
>
> I have some questions that I hope someone can help me with.
>
> 1)      Are there any studies on the benefits / drawbacks of internal vs.
> external tag attachment in flatfish >300mm?  (Differences in survival,
> growth, movement or tag fouling?)
>
> 2)      Are there any studies on flounder, or similar species, examining
> the
> effects of temperature on post-release survival after surgery / tagging (or
> capture, by itself)? (Is there a “magic” temperature below which southern
> flounder will almost certainly survive?)
>
> 3)      Are there studies examining survival of surgery in the wild vs in
> tanks? (Fish released into the wild may be more susceptible to predation
> immediately post-release, whereas those in tanks may be stressed by
> unnatural conditions).
>
> 4)      Are there any studies comparing tags applied to sedated vs non-
> sedated fish? (For quick, 3-4 min surgical procedures, could using
> anesthesia be more stressful than not using it?).
>
> From my findings so far, my impression is that external tagging is quicker
> and less stressful, and that repeating trials at lower fall temperatures
> (<25
> oC?) will show much better survival. The acoustic tags are ~$300 each, so
> I don’t want to put dead fish out there.
>
> Thank You
>
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