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Subject: Re: Anguilla anguilla feeding on Daphnia
From: [log in to unmask]
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Tue, 18 Nov 2008 10:29:07 -0500

text/plain (105 lines)


I've not heard of this, but am curious because crustaceans may be
intermediate or paratenic hosts for Anguillacola crassus, a parasite of
concern here in North America.  How big were the eels?  Thanks.

One note.  We looked at stomach contents of American eels in the Roanoke
River, North Carolina, in 2000 and found a prevalent food item in eels up
to around 350 mm was small case-building caddisflies (Trichoptera), of a
sort that built their cases from Hydrilla verticillata leaves.  Because the
cases were usually intact, are usually attached to a substrate, and the
eels were collected from dense patches of Hydrilla, it appeared the eels
had actively found and fed on the caddisflies.  May be smaller food items
are more frequently utillized by eels than we'd previously thought.

Bob Graham
Environmental Biology
4111 Castlewood Road
Richmond, VA  23234
[log in to unmask]
Pager 7044
804 271-5377

             <[log in to unmask]                                          To 
             uk>                       [log in to unmask]            
             Sent by:                                                   cc 
             Scientific forum                                              
             on fish and                                           Subject 
             fisheries                 Anguilla anguilla feeding on        
             <[log in to unmask]         Daphnia                             
             10/04/2008 12:23                                              
             Please respond to                                             
             Scientific forum                                              
                on fish and                                                
             <[log in to unmask]                                             

Dear all

Another question about people's experience, this time about eels (Anguilla
anguilla & others).

A student of mine came has been working on a freshwater lake, and reported
that he was getting large numbers of Daphnia from yellow eel stomachs
(TL>400 - 800 mm).I rose my eyebrows and suggested that he was likely to be
mistaken, but to my surprise, he was right. Some individuals had stomachs
distended with the volume of Daphnia they had consumed. Now, I can imagine
glass eels feeding on zooplankton, but struggle to think of how yellow eels
would do this....

Has anyone ever recorded yellow eels feeding on Daphnia or read of reports
in the literature?

Thanks in advance


><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><
Dr Chris Harrod
Lecturer in Fish and Aquatic Ecology
Queen's University Belfast
School of Biological Sciences
Medical Biology Centre
97 Lisburn Road
Belfast BT9 7BL
[log in to unmask]
Tel: +44 (0) 28 909 72271
Mob: +44 (0) 79 77419314
Lab: +44 (0) 28 909 72106
Fax: +44 (0) 28 909 75877
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