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Hello *Zach:*
Herring should most probably feed on plankton, adults abundantly eating
zooplakton. This sholdn´t be difficult to process if you work with fresh,
not frozen individuals. Fixing stomach contents on alcohol 5 to 10 %
solution is best for preservation. Also considering sectioning only the
anterior part of digestive tract, mostly stomach contents which
should be composed of hole distinguishable food item you shold count or
weigh depending on size of these items.
See if this helps, just to start with.
Best of Luck
Eduardo D Sendra
On Tue, Nov 22, 2011 at 8:15 AM, Mareike Volkenandt <[log in to unmask]>wrote:
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> REPLIES WILL BE SENT TO THE FISH-SCI LIST
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>
> Hello everyone!
>
> I just started with my PhD-thesis. Between other things, I would like to
> look at the stomach content of Herring from different size classes. It's
> the
> first time, that I'm doing such an analysis. We weight the stomachs and
> visually estimate level of fullness. We also want to identify prey species.
> In a test run, I had difficulties recognizing any prey species or groups in
> the stomach. It was only a big, brownish, digested mix of something...
>
> Do you have any advise on a best method or way of handling?
> Could you recommend me any identification keys or literature references
> that
> were helpful for your work?
>
> Thank you in advance.
>
> Mareike
>
>
> -------------------------------------------------------------------------------------------
> Mareike Volkenandt
> MARES Phd student
>
> Marine Biodiversity Research Group
> Marine & Freshwater Research Center
> Galway - Mayo Institute of Technology
> Dublin Rd
> Galway, Ireland
>
> Phone: +353(0)9174 2502
> [log in to unmask]
>
> About MARES: http://www.mares-eu.org/
>
> ------------------------------------------------------------------------------------------
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