species                     sample_number  cruise_id  lat    lon      date         length  replicate_number  d15N   d13C    Molar_C_to_N  
Dosidicus_gigas             Dg1            SWFSC1630  8.73   -108.05  2006-10-17   98      1                 13.4   -17.3   3.73          
Dosidicus_gigas             Dg2            SWFSC1630  8.73   -108.05  2006-10-17   148     1                 14.7   -17.0   3.83          
Dosidicus_gigas             Dg3            SWFSC1630  8.20   -100.19  2006-10-12   225     1                 14.8   -17.4   3.80          
Dosidicus_gigas             Dg4            SWFSC1630  9.03   -93.06   2006-10-05   197     1                 13.3   -17.1   3.77          
Dosidicus_gigas             Dg5            SWFSC1630  9.03   -93.06   2006-10-05   193     1                 13.2   -17.4   3.81          
Dosidicus_gigas             Dg6            SWFSC1630  6.23   -90.91   2006-09-22   167     1                 12.6   -18.0   3.74          
Dosidicus_gigas             Dg7            SWFSC1630  8.38   -89.48   2006-09-21   155     1                 12.9   -17.2   3.76          
Dosidicus_gigas             Dg8            SWFSC1630  8.38   -89.48   2006-09-21   159     1                 12.5   -17.3   3.71