Abstract
In order to contribute to a better understanding of feeding behaviour of adult twaite shad, Alosa fallax, in freshwater, we studied the stomach content composition of 147 A. fallax during their upstream spawning migration in the River Ulla (Galicia, NW Spain). The diet composition included 34 types of prey, aquatic invertebrates being the most important food. The present study is, to the best of our knowledge, the first record of A. fallax feeding on potamodromous Pseudochondrostoma duriense.
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