Table 2. Mean, standard deviation and CV (%) of annual yield.
| 100 yrs | 20,000 yrs | |||||
| mean | SD | CV | mean | SD | CV | |
| CRF s | 256.6 | 72.0 | 28.1 | 254.3 | 83.9 | 33.0 |
| CRN s | 220.3 | 322.4 | 146.3 | 244.5 | 343.0 | 140.3 |
| BRF s | 282.8 | 50.6 | 17.9 | 258.6 | 58.9 | 22.8 |
| BRN s | 272.5 | 198.8 | 73.0 | 262.3 | 195.2 | 74.4 |
| BRF u | 251.8 | 55.0 | 21.9 | 253.5 | 57.6 | 22.7 |
| BRN u | 281.9 | 218.9 | 77.7 | 262.1 | 196.5 | 75.0 |
Two time series, one of 100 years and one of 20,000 years are presented. Mean values are given in thousands of tons. MSY from the F MSY -analysis is 254.4 thousand tons.