Go to  Advanced Search

A comparative study of iodine metabolism in juvenile Oncorhynchus

Show full item record

Files in this item

Files Size Format Description   View
UBC_1961_A6_7 E2 C6.pdf 4.370Mb Adobe Portable Document Format   View/Open
 
Title: A comparative study of iodine metabolism in juvenile Oncorhynchus
Author: Eales, John Geoffrey
Degree Master of Science - MSc
Program Zoology
Copyright Date: 1961
Subject Keywords Salmon; Metabolism
Abstract: Comparative histological and radiochemical studies of iodine metabolism in juvenile Oncorhynchus revealed good agreement between thyroid epithelial height and ability to convert I¹³¹ into protein-bound I¹³¹(PBI¹³¹). The ratio of I¹³¹ to PBl¹³¹ in plasma samples (Conversion Ratio) was considered superior to other thyroid assays reviewed. Peaks in thyroid activity and loss of I¹³¹ from the body occurred in sockeye and coho at the time of downstream migration, but in chum and pink only when postmigrants were retained in fresh water. In coho and sockeye these changes were transitory, in chum irreversible and in pink prolonged. On the above basis, thyroxine was assigned no specific role but a theory of smolt evolution was proposed and related to a phylogeny within the genus Oncorhynchus.
URI: http://hdl.handle.net/2429/39584
Series/Report no. UBC Retrospective Theses Digitization Project [http://www.library.ubc.ca/archives/retro_theses/]
Scholarly Level: Graduate

This item appears in the following Collection(s)

Show full item record

All items in cIRcle are protected by copyright, with all rights reserved.

UBC Library
1961 East Mall
Vancouver, B.C.
Canada V6T 1Z1
Tel: 604-822-6375
Fax: 604-822-3893