New Zealand Journal of Marine and Freshwater Research abstracts

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Predicting dry weight of New Zealand aquatic macroinvertebrates from linear dimensions

DALE J. TOWERS
IAN M. HENDERSON
CLARE J. VELTMAN

Department of Ecology
Massey University
Private Bag 11 222
Palmerston North, New Zealand

Abstract  Regression equations are presented for the estimation of dry weight from head width and body length for 20 common New Zealand stream-dwelling macroinvertebrate taxa. Equations for taxa grouped at order level are also provided. A power equation, y = a xb is used to express the relationship between dry weight and body size. For the majority of taxa, dry weight could be estimated with more precision from body length than from head width.

Keywords  Biomass; regression equations; aquatic macroinvertebrates; Insecta; New Zealand; streams

PDF file of entire paper: medium quality (494K); (scanned from paper original: notes about this process)

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