IGF-I as an indicator of growth rate in salmonids - Northwest Fisheries Science Center

IGF-I Indicator of Growth

Surface trawling for juvenile salmon on the Canadian R/V Ricker

Project Title

IGF-I as an indicator of growth rate in salmonids

Description

Insulin-like growth factor-I is one of the primary endocrine mediators of somatic growth. This work is two-fold. Laboratory work consists of rearing fish under different environmental conditions (feeding rate, feed composition, temperature) and testing whether IGF-I is related to growth under the given circumstances. In addition, blood from juvenile salmon has been collected from coastal water of Oregon, Washington, and British Columbia as well as the Puget Sound and Strait of Georgia. Plasma IGF-I levels are being compared to scale and otolith increments to establish IGF-I as a growth index in the ocean. Geographic and inter-annual differences in plasma IGF-I levels are also being established.

Principal Investigator

Brian Beckman; Resource Enhancement Utilization Technology Division

Collaborators

Ed Casillas (NMFS NWFSC)
Ric Brodeur (NMFS NWFSC)
Bill Peterson (NMFS NWFSC)
Bob Emmett (NMFS NWFSC)
Susan Hinton (NMFS NWFSC)
Cheryl Morgan (Oregon State University)
Joe Fisher (Oregon State University)
Casey Rice (NMFS NWFSC)
Rusty Sweeting (Pacific Biological Station, CDF&O)
Dick Beamish (Pacific Biological Station, CDF&O)
Marc Trudel (Pacific Biological Station, CDF&O)
David Welch (Pacific Biological Station, CDF&O)
Munetake Shimizu (UW School of Fisheries and Aquatic Sciences)
Brad Gadberry (UW School of Fisheries and Aquatic Sciences)
Kathy Cooper (UW School of Fisheries and Aquatic Sciences)
Paul Parkins (Pacific States Marine Fish Commission)

Physiology/Endocrinology