Developmental instability as an indicator of natural stress on the Pacific Hake (Merlussius productus)

Fishery Bulletin
By: , and 

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Abstract

Developmental lnstability (DI) has been proposed as an inexpensive, quickly applied, and sensitive indicator of stress that can be utilized in early warning and in monitoring anthropogenic impacts on fish and other animals and plants. A problem arises, however, to the extent that natural stressors confound the effects of human-induced disturbances. Our objective in this work was to investigate whether a natural stressor, in the form of EI Nino conditions, contributed to DI in the Pacific hake. Right-left (fluctuating> asymmetry of otolith length, width, growth rate, and weight, as well as right-left otolith shape differences, were used as measures of DI. Results show that indeed EI Nino disrupts development, indicating stress. This outcome suggests that DI, as an early warning and monitoring tool for stress, must be used with caution.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Developmental instability as an indicator of natural stress on the Pacific Hake (Merlussius productus)
Series title Fishery Bulletin
Volume 91
Year Published 1994
Language English
Publisher National Oceanic and Atmospheric Adminstration
Contributing office(s) Western Fisheries Research Center
Description 7 p.
First page 587
Last page 593
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