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Frequency of Fish Feeding

On Wed, 1 Dec 1999 03:48:02 -0500 (EST), Roger S. Miller  wrote:

> How often do you suppose researchers do gut-content studies and come up blank?
> I've never heard of it.
Dear Roger,

You may be interested to read "The Catfish Connection: Ecology, Migration,
and Conservation of Amazon Predators" by Ronaldo Barthem and Michael
Goulding (Columbia University Press: 1997). Chapter 6 deals with the diet
of large Pimelodids. Of the 12,000 specimens whose gut contents were studied
"less than 8 percent contained prey."  In other words, 92 per cent of
predatory pimelodids are going hungry at any given time.

Dinyar Lalkaka