Our finding that P. nigrolineatus fed a wood-diet or a mixed-diet has different fungal communities is consistent with previous and current research showing similar variations for the bacterial communities in different regions of the GI tract [30, McDonald, Watts and Schreier, manuscript in preparation]. Of particular interest is the hindgut, which contains cellulolytic bacteria ,, as well as sequences similar to C. macrocephala, which has been associated with waterlogged wood ,; any relationship between these bacteria and fungi and their role in the fish GI tract remains to be determined.