Collected reprints: Abstract 3311

Collected reprints

Abstract

Bergmans, M. (1984). Critique of some practices in life-history studies, with special references to harpacticoid copepods. Aust. J. Mar. Freshw. Res. 35: 375-383

Published studies on the demography and reproductive strategies of harpacticoid copepods are examined critically. At the technical level, the popular approximation r = ln R₀/T_c is shown to be inappropriate as an estimate of the intrinsic rate of increase of harpacticoids. It leads to a systematic underestimation, by 8-29%, for life histories typical of fast-breeding species. Various ad hoc variants of r and R₀ calculations occurring in the literature are also criticized. At the conceptual level, a more discriminating approach to life-history characteristics is necessary; this applies both to the assessment of their 'strategic' significance, and to their diagnostic power with regard to the various 'strategies'. Special attention is given to the non-equivalence of parity and voltinism. Recommendations that should promote the construction of a more rigorous cognitive framework are included.

Back to list of volumes Back to table of contents of volume 14