Interactive effects of age and environmental modifiers on the production of daily growth increments in otoliths of plainfin midshipman, Porichthys notatus.

Title:	Interactive effects of age and environmental modifiers on the production of daily growth increments in otoliths of plainfin midshipman, Porichthys notatus.
Author:	Campana, Steven orcid.org/0000-0002-7453-3761 1 authors Show fewer authors
Date:	1984
Language:	English
Scope:	13
Department:	Faculty of Life and Environmental Sciences
Series:	Fishery Bulletin; 82(1)
ISSN:	0090-0656
Subject:	Vatnafræði; Umhverfisfræði; Aquatic Science
URI:	https://hdl.handle.net/20.500.11815/2972
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Citation: Campana , S 1984 , ' Interactive effects of age and environmental modifiers on the production of daily growth increments in otoliths of plainfin midshipman, Porichthys notatus. ' , Fishery Bulletin , vol. 82 , no. 1 , pp. 165-177 .
Abstract: Daily growth increments were formed upon hatch unless a diel photoperiod was absent, but under constant light, an endogenous circadian rhythm became evident after 2-3wk acclimation, resulting in daily increment production. With increasing age, the influence of light as a Zeitgeber decreased, while daily increments became more prominent in all environments. Temperature fluctuation affected increment appearance, but did not entrain increment deposition.- from Author