That's really interesting. I have heard stories about how the locals use this behavior to catch the fish. They will go out in their dug-outs and wait to hear for the rasping of catfish. They would then reach in and grab them with their hands. Never seen it done though.

still, I wonder the nitrogen binding takes place in the gut. That is, after the food-mass has passed the stomach, which is (at least in mammals) the place where most of the protein downgrading takes place. Bacteria living in the gut will never enter the stomach – therefore I wonder where these b ...

if we work on the assumption that fish in nature are at least satisfactorily nourished (since they are growing and reproducing), then this would mean fish in captivity should experience greater than normal body growth on the algae diet. As a result, if we then put them on a wood-only diet, I can ...

Thanks for the great questions. I will answer them as best as I can. 1. The auxiliary lobe (AL) is a very interesting structure. It is small, bilobed, structure that straddles the midgut at the point where the intestines reverses its coiling direction. Structurally it resembles liver tissue (was ...

Hi All, My name is Ryan McDonald and I am the first author on the paper Nitrogenase diversity and activity in the gastrointestinal tract of the wood-eating catfish Panaque nigrolineatus . It makes me very happy to see there is such an extensive community who shares my interest in these organisms. I ...