Shrinkage correction and length conversion equations for Theragra chalcogramma, Mallotus villosus and Thaleichthys pacificus

Abstract

Preservation of walleye pollock Theragra chalcogramma, capelin Mallotus villosus and eulachon Thaleichthys pacificus by freezing decreased fork length (LF) up to 1·8, 5·6 and 2·7% and reduced mass by up to 8·4, 3·5 and 1·1%, respectively. Shrinkage of walleye pollock standard length (LS) was greater for fish in 95% ethanol v. 5% formalin and for fish in 10% formalin v. frozen. Equations describing the shrinkage and loss in mass for these species are presented as well as conversions between different length measurements (LS, LF and total length, LT) for fishes that were frozen.