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Weight loss and change of condition factor during fixation of Pacific herring, Clupea harengus pallasi , eggs and larvae

Weight loss and change of condition factor during fixation of Pacific herring, Clupea harengus... Dry weights of unfixed eggs and larvae of Pacific herring, Clupea harengus pallasi, taken at six different periods during development, were compared to those of larvae stored for 10 days in fixatives varying in salinity (0, 15, 28%‰) and formalin (4, 10, 20%) concentration. In most instances there was some weight loss of the fixed specimens. In general weight loss varied inversely with salinity and formalin concentration and was greater in larvae than eggs. Weight loss was greatest in recently fertilized eggs and decreased in older eggs. Weight loss in recently hatched larvae varied from 19 to 36% depending upon the salinity and formalin concentration. Weight loss varied inversely with larval size and fixation increased weight in some large larvae. Weight change during fixation could result in an artificial inflation of the estimate of condition factors, particularly in the younger smallest larvae. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Fish Biology Wiley

Weight loss and change of condition factor during fixation of Pacific herring, Clupea harengus pallasi , eggs and larvae

Journal of Fish Biology , Volume 25 (4) – Oct 1, 1984

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References (17)

Publisher
Wiley
Copyright
Copyright © 1984 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0022-1112
eISSN
1095-8649
DOI
10.1111/j.1095-8649.1984.tb04889.x
Publisher site
See Article on Publisher Site

Abstract

Dry weights of unfixed eggs and larvae of Pacific herring, Clupea harengus pallasi, taken at six different periods during development, were compared to those of larvae stored for 10 days in fixatives varying in salinity (0, 15, 28%‰) and formalin (4, 10, 20%) concentration. In most instances there was some weight loss of the fixed specimens. In general weight loss varied inversely with salinity and formalin concentration and was greater in larvae than eggs. Weight loss was greatest in recently fertilized eggs and decreased in older eggs. Weight loss in recently hatched larvae varied from 19 to 36% depending upon the salinity and formalin concentration. Weight loss varied inversely with larval size and fixation increased weight in some large larvae. Weight change during fixation could result in an artificial inflation of the estimate of condition factors, particularly in the younger smallest larvae.

Journal

Journal of Fish BiologyWiley

Published: Oct 1, 1984

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