| Age-at-first-reproduction 15 years assuming TL-at-maturity of
~5 m (Cailliet et al. 1983, Mollet et al. 2000), agrees with results of
vertebrae of Morro Bay white shark (TL = 4.3 m) which had ~12 bands and
was probably about 2-3 years from being mature.
Longevity ~60 years (Cailliet et al. 1983 VBGF with lohgevity estimate based upon 5 ln2/k),
Mortality, assume M = -ln(0.01)/60 = 0.07675 yr-1, (S = 0.9261) based on longevity of 60 years.
Fecundity, used mean litter size of mean of 8.9 (Francis 1996)
every third year (Mollet et al. 2000), i.e. effective annual female
fecundity of 8.9/(2x3) = 1.4833. Mollet et al. (2000) presented evidence
that the gestation time of the white shark is 18 months but forgot to
suggest that the reproductive cycle is accordingly most likely 3 years
long. Uchida et al. (1996) reported a litter of 10 with a total estimated
mass of 263 kg (17.2% of1528 kg mass of female).
|Solution using life history table or 55x55 Leslie matrix:
Lambda = 1.0082, growth rate of stable population (r = ln (lambda) = 0.0816 yr-1);
Net reproductvie rate Ro = 6.163,
Generation "times": Abar = 20.91 yr (an age), T = ln(Ro)/r = 23.11 yr, mu1 = 26.15 yr (an age)
Abar/alpha = 1.394
Elasticities from life history table or 55x55 Leslie matrix (assuming
gestation period (GP) of 1.5 yr)