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Lack of glucose and hsp70 responses in haddock Melanogrammus aeglefinus (L.) subjected to handling and heat shock

journal contribution
posted on 2008-01-01, 00:00 authored by Luis AfonsoLuis Afonso, S Hosoya, J Osborne, A Gamperl, S Johnson
Juvenile haddock Melanogrammus aeglefinus (c. 39 g) were exposed to either a handling stressor (1 min out of water) or heat shock (increase from 10 to 15° C for 1 h), and plasma cortisol, plasma glucose and gill hsp70 levels were determined before, and at 1, 3, 6, 12, 24 and 48 h post-stress. The pattern of cortisol increase was similar following both stressors, with levels increasing by 25-fold at 1 h post-stress, but returning to pre-stress levels (2–5 ng ml−1) by 3 h. In contrast, neither handling nor heat shock caused an increase in plasma glucose levels. Although gill hsp70 was detected, presumably constitutive levels, in both control and heat shocked groups, there were not significant changes in gill hsp70 levels after exposure to heat shock. The lack of glucose and hsp70 responses to these typical stressors is consistent with previous studies on Atlantic cod Gadus morhua, and suggests that the stress physiology of Gadidae differs from the ‘typical’ teleost.

History

Journal

Journal of fish biology

Volume

72

Issue

1

Pagination

157 - 167

Publisher

Wiley-Blackwell Publishing

Location

Oxford, England

ISSN

0022-1112

eISSN

1095-8649

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2008, Wiley-Blackwell