Values shown below are defaults. Please double-check, replace with better values as appropriate, and 'Recalculate'.
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Life History Data on Alosa agone
Agone
Family: Clupeidae                           Herrings, shads, sardines, menhadens
Max. length (Lmax): = cm
L infinity (Linf): =    s.e. - cm
Estimated from max. length.
L maturity (Lm):     s.e. - cm
Estimated from Linf.        Maturity data         
L max. yield (Lopt):    s.e. - cm
Estimated from Linf.
K: /year      Lm = cm      tm = years
Estimated from Linf, Lm, to and tm.
to: years       Estimated from Linf and K.
Natural mortality (M):   s.e. - /year
Estimated from Linf., K and annual mean temp. = °C
Life span (approx.):     s.e. -    years      Estimated from Linf., K and to.        Max. age & size data
Generation time:     s.e. -    years       Estimated from Lopt, Linf., K and to.
Age at first maturity (tm):     s.e. -    years       Estimated from Lm, Linf., K and to.
Length-weight: cm => (wet weight)
W = * L ^

Length-weight data
Nitrogen & protein:
Weight (g) => whole-body nitrogen (N) (g)
=> whole-body crude protein (g)
Relative Yield per Recruit (Y'/R): Estimate Y'/R from M/K, Lc/Linf and E.
Lc = cm    E =   /year
Emsy /year    Eopt /year
Fmsy /year    Fopt /year
Exploitation: Z=
F=
E=
Estimate Z, F, E from Lc, Lmean, Linf, K, M
Lc = cm
Lmean = cm
Resilience / productivity:
Vulnerable to extinction if decline in biomass or numbers exceeds threshold over the longer of 10 years or 3 generations.
Intrinsic rate of increase (rm): /year Lr = cm   
Estimated from Fmsy at Lc = length of recruitment (Lr).
Food consumption (Q/B): times the body weight per year Enter Winf, temperature, aspect ratio (A), and food type to estimate Q/B
Winf = g      Temp. = °C
A =     
     
     
Detrivore Herbivore Omnivore Carnivore
Estimate growth
Note: The estimates are derived from default values taken from FishBase and will thus not be appropriate for every population. You can change these values and recalculate the life history parameters. Search FishBase Back to Search
Search FishBase Species summary
Life History Data created by: Eli, 01.06.99, php script by, kbanasihan, 22.10.10, last modified by, kbanasihan, 12.11.10