"species_id","year","total_abundance","total_biomass_kg" "DM",1977,264,7.57 "DO",1977,12,0.512 "DS",1977,98,3.886 "NL",1977,31, "OL",1977,10,0.065 "OT",1977,17,0.042 "OX",1977,7,0.064 "PE",1977,6,0.039 "PF",1977,31,0.165 "PP",1977,7,0.046 "RM",1977,2,0.02 "SH",1977,1, "SS",1977,1, "AH",1978,1, "DM",1978,389,14.36 "DO",1978,22,0.99 "DS",1978,320,34.214 "NL",1978,48,5.909 "OL",1978,47,1.1480000000000001 "OT",1978,66,1.161 "OX",1978,1, "PE",1978,17,0.28600000000000003 "PF",1978,40,0.241 "PM",1978,3,0.062 "PP",1978,24,0.342 "...",,, 509,,,