Tania Siemens wrote:
> Hello,
>
> My name is Tania Siemens and I am studying the way in which fish
> habitat is
> changed by an invasive aquatic weed in a mangrove lagoon in the Galapagos
> Islands. I would like to use acoustics to characterize the vertical
> structure of habitat. I think it might be possible to lower a sideways
> looking (small) acoustic device and record the images, which would
> function as a index of habitat
> structure. This way I could quantitatively compare this habitat
> structure (heterogeneity vs. homogeneity) to invaded (grass) and non
> invaded
> (mangroves) sites.
>
> Do you know of any such acoustic devise that might work for me? Can you
> refer me to someone who has done a similar study or might be able to give
> me some direction?
Hi Tania,
Take a look at this site:
<a href="http://www.apl.washington.edu/programs/DIDSON/DIDSON.html";
rel="nofollow">http://www.apl.washington.edu/programs/DIDSON/DIDSON.html</A> .
Feel free to
email me off list for more information. I have used this device
extensively for fish behavior and identification studies. We have a
somewhat similar project in mind related to eelgrass distribution and
the Washington State ferry system.
--
Charlie Escher
Sr. Electronics Technician
Fisheries Engineering Team
MEVATEC Corp
North Bonneville, WA
(509) 427-8570 x18
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