Use of fish production per unit biomass ratios for measuring the productive capacity of fish habitats

  • Randall R
  • Minns C
  • 88


    Mendeley users who have this article in their library.
  • 52


    Citations of this article.


Species-specific production rate per unit biomass (P/B, per year) ratios were calculated for 79 freshwater fish species of eastern Canada. P/B (per year) ratios were calculated using two methods, which were based on allometry with fish weight-at-maturity and life expectancy, respectively. P/B (per year) values obtained by the two methods were significantly correlated, as expected from life history theory, since the two predictors (longevity, size-at-maturity) were themselves correlated. Species-specific P/B (per year) ratios were also significantly correlated with field observations of P/B from published sources. The estimation of P/B based on allometry with fish size is recommended because of its utility; the predictive equation is P/B (per year) = 2.64Wmat −035. , where Wmat is weight-at-maturity. Both the coefficient 2.64 and the exponent –0.35 of this equation are provisional and require further validation from field studies of fish production. More accurate estimates of P/B are possible if population-specific information on size-at-maturity or mean size is known. The product of average fish biomass and estimated P/B coefficients (habitat productivity index (HPI) = B × P/B) is a proposed measure of habitat productive capacity.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • R G Randall

  • C K Minns

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free