256
12. Kelp, Urchins, and Otters in the California Coastal Region
Urchins_4650 + Urchins_5 155 + Urchins_5660 +
Urchins_60plus
Total_Urchin_Biomass = Total_Wtl + t ot a l _Wt 2 +
total_wt3 + total_wt4 + total_wt5 + total_wt6 +
total_wt7 + total_wt8 + total_wt9 + total_wtl0 +
total_wtll + total_wt12 + total_wt13
Total_Wtl = AveW tl *Urchins_05 {kg}
tto = 11 {month}