Recently I did a necropsy on two stranded and deceased sperm whales at Kunashir, Kuril Islands, Russian Far East. From one of the stomachs, 2060 upper - and 2010 lower squid beaks were collected. I would like to try to estimate total weight of food mass, and used these formulas: Mantle Length = 44.2 + 357.9*(Rostrum length) - (Wolff, 1984) and Body Weight (g) = 0.0151 × (Mantle Length (mm) )3.2. Something goes wrong with the latter formula and I keep getting huge values. Could anyone advise on what I am doing wrong or what other formulas better to use? Best of thanks!