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Article: Estimating live standard length of net-caught walleye pollock (Theragra chalcogramma) larvae using measurements in addition to standard length *.(Statistical Data Included)
- Article from:
- Fishery Bulletin
- Article date:
- October 1, 2001
- Author:
CopyrightCOPYRIGHT 2001 National Marine Fisheries Service. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Accurate measurement of larval fish lengths from ichthyoplankton samples is critical in the estimation of growth, birthdate and mortality. It is well known that larvae shrink in length 1) when caught in plankton nets (Theilacker, 1980; Hay, 1981), 2) between the time of collection and preservation, and 3) afterwards from the effects of preservation in chemicals or from freezing (Theilacker, 1980; Fowler and Smith, 1983; Yin and Blaxter, 1986). Shrinkage caused by the plankton net (the net can damage a larva's integument; Holliday and Blaxter, 1960) and by delays in preservation can be up to 40% of the initial live length (Hay, 1981). In some cases, measurements of larval ...
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