Abstract
Estimates of biomass are essential for studies modeling the structure, animal growth, production, and energy flow in ecosystems. The relationships between dry weight and head capsule width or body length in summer and winter were examined for four species of predatory stonefly (Perlidae) nymphs in Japan. There were some variations in regression constants between seasons and species. However, the distribution of length-weight plots did not show marked differences between species or season. Our results suggest that length-weight relationship data, regardless of season or including multiple species, are also valid for estimation of dry weight when the target species are classified into the same taxonomic family.
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