Document Detail


Environmental rearing conditions produce forebrain differences in wild Chinook salmon Oncorhynchus tshawytscha.
MedLine Citation:
PMID:  16890467     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Recent studies suggest that hatchery-reared fish can have smaller brain-to-body size ratios than wild fish. It is unclear, however, whether these differences are due to artificial selection or instead reflect differences in rearing environment during development. Here we explore how rearing conditions influence the development of two forebrain structures, the olfactory bulb and the telencephalon, in juvenile Chinook salmon (Oncorhynchus tshawytscha) spawned from wild-caught adults. First, we compared the sizes of the olfactory bulb and telencephalon between salmon reared in a wild stream vs. a conventional hatchery. We next compared the sizes of forebrain structures between fish reared in an enriched NATURES hatchery and fish reared in a conventional hatchery. All fish were size-matched and from the same genetic cohort. We found that olfactory bulb and telencephalon volumes relative to body size were significantly larger in wild fish compared to hatchery-reared fish. However, we found no differences between fish reared in enriched and conventional hatchery treatments. Our results suggest that significant differences in the volume of the olfactory bulb and telencephalon between hatchery and wild-reared fish can occur within a single generation.
Authors:
R L Kihslinger; S C Lema; G A Nevitt
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-06-30
Journal Detail:
Title:  Comparative biochemistry and physiology. Part A, Molecular & integrative physiology     Volume:  145     ISSN:  1095-6433     ISO Abbreviation:  Comp. Biochem. Physiol., Part A Mol. Integr. Physiol.     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-09-25     Completed Date:  2006-11-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9806096     Medline TA:  Comp Biochem Physiol A Mol Integr Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  145-51     Citation Subset:  IM    
Affiliation:
Section of Neurobiology, Physiology and Behavior, University of California, Davis, One Shields Avenue Davis, CA 95616, USA. rlkihslinger@hotmail.com
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MeSH Terms
Descriptor/Qualifier:
Animals
Animals, Wild
Behavior, Animal
Environment*
Fisheries*
Olfactory Bulb / growth & development
Salmon / anatomy & histology,  growth & development*
Telencephalon / growth & development

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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