month1,Bot. Temp,Liver index,1stand.dev,Herring biomass
March,5,n/a,n/a,20
April,5.5,2.7740669,1.1005239,10
May,6.1,n/a,n/a,2
June,7,n/a,n/a,0
July,8.5,n/a,n/a,0
August,10,n/a,n/a,0
September,11,n/a,n/a,110
October,10.5,6.00387,2.5116856,110
November,9,7.18727,2.3249049,100
December,7,n/a,n/a,70
January,5.8,5.461964,1.5702697,60
February,5,3.723659,1.1974638,40