In astrophysics yes (although I only follow the fields through friends), quite a lot of linear algebra/physics reference libraries are in Fortran, and new programs are still being developed in the more modern versions of it.

In Bioinformatics, not at all. Or at least in no direct way that I'm aware of. Sure, R packages indirectly call upon Fortran libraries (LAPACK et al.), but user facing programs are mostly, from my experience, written in C, C++, Java, Python & Perl.