2. CRFM - Barbados Summary. Multispecies. Predation. Predation. R. M. Z. r. F. G. Population dynamic models. Stock B. Environment. Fishing. Management. Climate. 2 kind of models: Individually based models Population models. Population growth.
GPopulation dynamic models
B∞ = K
Blueweiss et al. (1978)
Modified from Banse & Mosher (1980)
Log P/B ratio is a linear function of log body size
Number of deaths ti - ti+1
Number caught in interval i
Mean number in interval i
if F = M
The exploitation rate (E) is
Gulland’s estimator for unfished stocks:
Cadima’s estimator for fished stocks:
Jeppe’s estimator for fished stocks:Simple estimators
BMSY, Minimum SSB, MBAL, Bpa
Stocking, Bio-manipulation, Enhancement
Size of capture: tc
Mortality index: Z=F+M
Exploitation rate: E = F/Z
Effort control: f = F/q
F control: F0.1, Fmed etc.
MSY, TAC, ITQ, Bag limit
That is all. Any available or conceivable regulation can be reduced to one of the three terms.