into Corydoradinae Catfish
Quite a lot of Scientific work has been done with these type of catfish.
IUCN has a list of species with population trends and threat levels: IUCN Red List
Below you find a couple of links to places like:
Read more and download PDF:s
Some of the PDF are not for free and you have to pay to see or download them. In some cases you can apply for a free membership and download some of the scientific papers.