Journal article
Endocrine changes associated with the growth of pre-vitellogenic oocytes in coho salmon, Oncorhynchus kisutch
Fish physiology and biochemistry, Vol.28(1), pp.287-289
03/2003
Handle:
https://hdl.handle.net/2376/112788
Abstract
It has been hypothesized that in salmonids there are two periods when growth can alter the decision to mature; thus, for a fall spawning species, an `initiation' period in the fall is followed by a `permissive' period for continuing maturation in the spring. Research in mammalian and avian models have shown that follicle-stimulating hormone (FSH), steroidogenic acute regulatory protein (StAR) and 17β-estradiol are key components controlling oocyte growth. In the present study we sampled two-year-old female coho salmon during the proposed fall `initiation' period. Histological analyses of the ovaries indicated that from August to December (11–15 months prior to spawning) oocytes developed from the late perinucleolar to mid-cortical alveoli stage. The accumulation of cortical alveoli during this period was accompanied by significant increases in GSI, pituitary and plasma FSH, and plasma 17β-estradiol. In addition, small but significant increases in transcript levels for FSH receptor and StAR occurred during the fall. Such changes in FSH signaling are consistent with a proposed role for FSH stimulation of oocyte growth via steroid production during the fall initiation period.
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Details
- Title
- Endocrine changes associated with the growth of pre-vitellogenic oocytes in coho salmon, Oncorhynchus kisutch
- Creators
- B Campbell - School of Aquatic and Fishery Sciences University of Washington Seattle WA USAJ Dickey - School of Aquatic and Fishery Sciences University of Washington Seattle WA USAB Beckman - Integrative Fish Biology Program, Resource Enhancement Utilization Technology Division Northwest Fisheries Science Center 2725 Montlake Blvd. East Seattle WA USAG Young - Department of Biological Sciences and Center for Reproductive Biology University of Idaho PO Box 443051 Moscow ID USAA Pierce - School of Aquatic and Fishery Sciences University of Washington Seattle WA USAP Swanson - Integrative Fish Biology Program, Resource Enhancement Utilization Technology Division Northwest Fisheries Science Center 2725 Montlake Blvd. East Seattle WA USA
- Publication Details
- Fish physiology and biochemistry, Vol.28(1), pp.287-289
- Academic Unit
- UNKNOWN
- Publisher
- Kluwer Academic Publishers; Dordrecht
- Identifiers
- 99900547749001842
- Language
- English
- Resource Type
- Journal article