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The parr-smolt transformation is a hormone-driven developmental process that is adaptive for downstream migration and seawater entry. Recently, environmental estrogens such as nonylphenol have been implicated in reduced returns of Atlantic salmon in the wild (Fairchild et al. 1999). Previous researc...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.587.7675 2023-05-15T15:31:00+02:00 EXTENDED ABSTRACT ONLY- DO NOT CITE Stephen D. Mccormick Michael F. O’dea Amy Moeckel Björn Thrandur Björnsson The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.7675 http://www-heb.pac.dfo-mpo.gc.ca/congress/2002/ionreg/mccormick.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.7675 http://www-heb.pac.dfo-mpo.gc.ca/congress/2002/ionreg/mccormick.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www-heb.pac.dfo-mpo.gc.ca/congress/2002/ionreg/mccormick.pdf text ftciteseerx 2016-01-08T13:20:23Z The parr-smolt transformation is a hormone-driven developmental process that is adaptive for downstream migration and seawater entry. Recently, environmental estrogens such as nonylphenol have been implicated in reduced returns of Atlantic salmon in the wild (Fairchild et al. 1999). Previous research has shown that sex steroids interfere downstream migratory behavior and the development of salinity tolerance that normally occurs during smolting (Madsen et al., 1997; Munakata et al. 2000). The present study was designed to determine the endocrine pathways through which sex steroids and their agonists may act to affect the parr-smolt transformation. Junvenile Atlantic salmon were injected with 0.5, 2, 10, 40 and 150 ug/g branched 4-nonylphenol and 2 ug/g estradiol-17B during the parr-smolt transformation in late March and sampled 1 and 2 weeks after first exposure. Treatment with estradiol and 150 ug/g nonylphenol resulted in lower salinity tolerance after two weeks of exposure. Plasma insulin-like growth factor I (IGF-I) was 30-60 % lower in estradiol and 150 ug/g nonylphenol treated fish Text Atlantic salmon Unknown |
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English |
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The parr-smolt transformation is a hormone-driven developmental process that is adaptive for downstream migration and seawater entry. Recently, environmental estrogens such as nonylphenol have been implicated in reduced returns of Atlantic salmon in the wild (Fairchild et al. 1999). Previous research has shown that sex steroids interfere downstream migratory behavior and the development of salinity tolerance that normally occurs during smolting (Madsen et al., 1997; Munakata et al. 2000). The present study was designed to determine the endocrine pathways through which sex steroids and their agonists may act to affect the parr-smolt transformation. Junvenile Atlantic salmon were injected with 0.5, 2, 10, 40 and 150 ug/g branched 4-nonylphenol and 2 ug/g estradiol-17B during the parr-smolt transformation in late March and sampled 1 and 2 weeks after first exposure. Treatment with estradiol and 150 ug/g nonylphenol resulted in lower salinity tolerance after two weeks of exposure. Plasma insulin-like growth factor I (IGF-I) was 30-60 % lower in estradiol and 150 ug/g nonylphenol treated fish |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Stephen D. Mccormick Michael F. O’dea Amy Moeckel Björn Thrandur Björnsson |
spellingShingle |
Stephen D. Mccormick Michael F. O’dea Amy Moeckel Björn Thrandur Björnsson EXTENDED ABSTRACT ONLY- DO NOT CITE |
author_facet |
Stephen D. Mccormick Michael F. O’dea Amy Moeckel Björn Thrandur Björnsson |
author_sort |
Stephen D. Mccormick |
title |
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title_short |
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title_full |
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title_fullStr |
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title_full_unstemmed |
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title_sort |
extended abstract only- do not cite |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.7675 http://www-heb.pac.dfo-mpo.gc.ca/congress/2002/ionreg/mccormick.pdf |
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Atlantic salmon |
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Atlantic salmon |
op_source |
http://www-heb.pac.dfo-mpo.gc.ca/congress/2002/ionreg/mccormick.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.7675 http://www-heb.pac.dfo-mpo.gc.ca/congress/2002/ionreg/mccormick.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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