New Zealand Journal of Marine and Freshwater Research abstracts

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Determining head capsule width of the mayflies Deleatidium spp. from labia lengths (Note)

MICHAEL S. FIELD-DODGSON

Fisheries Research Division Ministry of Agriculture and Fisheries P. O. Box 8324, Riccarton Christchurch, New Zealand

Abstract A method is described that enables determination of the head capsule width of Deleatidium spp., from labia length measurements only. This method has proven useful for gut analysis of recently emerged chinook salmon (Oncorhynchus tsawytscha) of fork length 29-34 mm.

Keywords diet; salmon; Deleatidium; labium length; head capsule width; food size; prey width

New Zealand Journal of Marine and Freshwater Research, 1987, Vol. 21 0028-8330/87/2101-0151$2.50/0 © Crown copyright 1987 Received 11 February 1986; accepted 12 May 1986

PDF file of entire paper: medium quality (149K); (scanned from paper original: notes about this process)

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