Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities

Sakamoto, T. ; Iwata, M. ; Hirano, T.

Amsterdam : Elsevier
ISSN:
0016-6480
Source:
Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
Topics:
Biology
Medicine
Type of Medium:
Electronic Resource
URL:
_version_ 1798290849704968192
autor Sakamoto, T.
Iwata, M.
Hirano, T.
autorsonst Sakamoto, T.
Iwata, M.
Hirano, T.
book_url http://dx.doi.org/10.1016/0016-6480(91)90182-6
datenlieferant nat_lic_papers
fussnote The kinetics of growth hormone (GH) and prolactin (PRL) in coho salmon (Oncorhynchus kisutch) transferred from fresh water (FW) to seawater (SW) and vice versa were examined to help clarify the osmoregulatory roles of the two hormones during periods of migration to different salinities. Chum salmon GH or PRL was administered by a single injection intraarterially, and metabolic clearance rate (MCR) and secretion rate (SR) of injected hormones were calculated from the disappearance of the hormones from the plasma. When coho salmon smolts were acclimated to SW, MCR, SR, and plasma level of GH in SW-adapted (2-3 weeks) fish were twice as great as those in fish in FW. On the other hand, there was no difference in the kinetics of GH between the adult coho salmon in SW and those adapted to FW (2-3 weeks). The transfer of the adult coho salmon from SW to FW was followed after 2 days by a rise in plasma level and SR of PRL, which tended to stay at high levels after 2-3 weeks. The MCR of PRL increased significantly after 2-3 weeks in FW. These results support the likelihood of an important role of GH in SW adaptation and of PRL in FW adaptation in coho salmon.
hauptsatz hsatz_simple
identnr NLZ183717031
issn 0016-6480
journal_name General and Comparative Endocrinology
materialart 1
package_name Elsevier
publikationsort Amsterdam
publisher Elsevier
reference 82 (1991), S. 184-191
search_space articles
shingle_author_1 Sakamoto, T.
Iwata, M.
Hirano, T.
shingle_author_2 Sakamoto, T.
Iwata, M.
Hirano, T.
shingle_author_3 Sakamoto, T.
Iwata, M.
Hirano, T.
shingle_author_4 Sakamoto, T.
Iwata, M.
Hirano, T.
shingle_catch_all_1 Sakamoto, T.
Iwata, M.
Hirano, T.
Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
0016-6480
00166480
Elsevier
shingle_catch_all_2 Sakamoto, T.
Iwata, M.
Hirano, T.
Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
0016-6480
00166480
Elsevier
shingle_catch_all_3 Sakamoto, T.
Iwata, M.
Hirano, T.
Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
0016-6480
00166480
Elsevier
shingle_catch_all_4 Sakamoto, T.
Iwata, M.
Hirano, T.
Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
0016-6480
00166480
Elsevier
shingle_title_1 Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
shingle_title_2 Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
shingle_title_3 Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
shingle_title_4 Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
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wilbert
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source_archive Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
timestamp 2024-05-06T08:23:15.413Z
titel Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
titel_suche Kinetic studies of growth hormone and prolactin during adaptation of coho salmon, Oncorhynchus kisutch, to different salinities
The kinetics of growth hormone (GH) and prolactin (PRL) in coho salmon (Oncorhynchus kisutch) transferred from fresh water (FW) to seawater (SW) and vice versa were examined to help clarify the osmoregulatory roles of the two hormones during periods of migration to different salinities. Chum salmon GH or PRL was administered by a single injection intraarterially, and metabolic clearance rate (MCR) and secretion rate (SR) of injected hormones were calculated from the disappearance of the hormones from the plasma. When coho salmon smolts were acclimated to SW, MCR, SR, and plasma level of GH in SW-adapted (2-3 weeks) fish were twice as great as those in fish in FW. On the other hand, there was no difference in the kinetics of GH between the adult coho salmon in SW and those adapted to FW (2-3 weeks). The transfer of the adult coho salmon from SW to FW was followed after 2 days by a rise in plasma level and SR of PRL, which tended to stay at high levels after 2-3 weeks. The MCR of PRL increased significantly after 2-3 weeks in FW. These results support the likelihood of an important role of GH in SW adaptation and of PRL in FW adaptation in coho salmon.
topic W
WW-YZ
uid nat_lic_papers_NLZ183717031