eCite Digital Repository
Effects of aquaculture related stressors and nutritional restriction on circulating growth factors (GH, IGF-I and IGF-11) in Atlantic salmon and rainbow trout
Citation
Wilkinson, RJ and Porter, MJR and Woolcott, H and Longland, RM and Carragher, JF, Effects of aquaculture related stressors and nutritional restriction on circulating growth factors (GH, IGF-I and IGF-11) in Atlantic salmon and rainbow trout, Comparative Biochemistry and Physiology. Part A: Molecular & Integrative Physiology, 145, (2) pp. 214-224. ISSN 1095-6433 (2006) [Refereed Article]
DOI: doi:10.1016/j.cbpa.2006.06.010
Abstract
The effects of aquaculture related stressors on circulating levels of GH, IGF-I and for the first time, IGF-II in Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) were investigated. Specifically, circulating growth factor levels were measured in four different experiments. Two 24 h confinement stressor procedures, (one with Atlantic salmon, the other with rainbow trout); following a hypo-osmotic stressor (freshwater bath) in salt water acclimated, adult, Atlantic salmon; and during a 22 day starvation and re-feeding protocol with juvenile Atlantic salmon. Handling and confinement resulted in significant decreases in circulating levels of all three growth factors in Atlantic salmon, and IGF-I and IGF-II (but not GH) in rainbow trout. A 2-3 h freshwater bath to remove gill parasites on a commercial Atlantic salmon aquaculture operation caused a significant decrease in circulating GH and IGF-I concentrations, but no significant change in IGF-II concentration, 2 days post bathing. Starvation for a period of 15 days in Atlantic salmon resulted in a significant increase in circulating GH levels and a significant decrease in circulating IGF-I and IGF-II. Re-feeding of starved fish for 7 days resulted in a significant decrease in GH to the concentration measured in continually fed fish, however re-feeding did not change plasma levels of IGF-I and IGF-II relative to continually starved fish. The results presented here confirm previously observed handling and confinement stressor induced effects on GH and IGF-I and, for the first time, on IGF-II in salmonids. Furthermore this study confirms the nutritional regulation of GH, IGF-I and IGF-II in juvenile Atlantic salmon.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Agricultural, Veterinary and Food Sciences |
| Research Group: | Fisheries sciences |
| Research Field: | Aquaculture |
| Objective Division: | Animal Production and Animal Primary Products |
| Objective Group: | Fisheries - aquaculture |
| Objective Field: | Fisheries - aquaculture not elsewhere classified |
| UTAS Author: | Wilkinson, RJ (Dr Ryan Wilkinson) |
| UTAS Author: | Porter, MJR (Dr Mark Porter) |
| UTAS Author: | Woolcott, H (Ms Hannah Woolcott) |
| UTAS Author: | Longland, RM (Mr Ryan Longland) |
| ID Code: | 42112 |
| Year Published: | 2006 |
| Web of Science® Times Cited: | 81 |
| Deposited By: | TAFI - Aquaculture |
| Deposited On: | 2006-08-01 |
| Last Modified: | 2010-06-03 |
| Downloads: | 0 |
Repository Staff Only: item control page