The effects of environmental stress on the physiology of growth in rainbow trout, Salmo gairderi Richardson

Pickering, A.D. and Pottinger, T.G. and Sumpter, J.P. and Carragher, J.F. (1988) The effects of environmental stress on the physiology of growth in rainbow trout, Salmo gairderi Richardson. Ambleside, UK, Freshwater Biological Association, 47pp. (W1/272/IF).

Preview

PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader Download (1072Kb) | Preview

Abstract

There is little doubt that both mammalian and teleost growth hormones can accelerate growth and increase food conversion efficiency in all commonly-reared species of salmonid fish. In those vertebrates that have been closely studied (predominantly mammals), the pituitary hormone somatotropin (GH or growth hormone) is a prime determinant of somatic growth. The hormone stimulates protein biosynthesis and tissue growth, enhances lipid utilization and lipid release from the adipose tissues (a protein-sparing effect) and suppresses the peripheral utilization of glucose. The present study is a prerequisite for future work on growth hormone physiology in salmonids and should contribute to our understanding of the mechanisms of growth suppression in stressed fish. Plasma growth hormone (GH) levels were measured in rainbow trout using a radioimmunoassay developed against chinook salmon growth hormone.

Actions (login required)