GAAS (Genome relative Abundance and Average Size) is a bioinformatic tool to calculate accurate community composition and average genome size in metagenomes by using BLAST, advanced parsing of hits and correction of genome length bias.
http://www.ncbi.nlm.nih.gov/pubmed/20011103
Install in:
/paracel/paracel/biosoft/GAAS
Modified it to work with Paracel blast. Make changes in: Makefile.PL
# External GAAS dependency: NCBI BLAST requires_external_bin 'pb blastall'; requires_external_bin 'pb formatdb';
and
/mnt/export/paracel/biosoft/GAAS/lib/GAAS.pm