Picture of aircraft jet engine

Strathclyde research that powers aerospace engineering...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by Strathclyde researchers involved in aerospace engineering and from the Advanced Space Concepts Laboratory - but also other internationally significant research from within the Department of Mechanical & Aerospace Engineering. Discover why Strathclyde is powering international aerospace research...

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

The effect of food on the determination of sex ratio in Calanus spp.: evidence from experimental studies and field data

Irigoien, X. and Obermuller, B. and Head, R.N. and Harris, R.P. and Rey, C. and Hansen, B.W. and Hygum, B.H. and Heath, M.R. and Durbin, E.G. and , TASC (Funder) (2000) The effect of food on the determination of sex ratio in Calanus spp.: evidence from experimental studies and field data. ICES Journal of Marine Science, 57 (6). pp. 1752-1763. ISSN 1054-3139

[img]
Preview
PDF (strathprints018643.pdf)
strathprints018643.pdf

Download (5MB) | Preview

Abstract

The effect of food concentration on the sex ratio in Calanus spp. has been investigated in laboratory and mesocosm experiments. The results of the experiments are compared with time series in the field and with physiological rates. The food concentration and quality had an effect on the sex ratio of adult Calanus, with higher percentages of males obtained with increased food concentration. Laboratory experiments and field time series suggest that sex can still change at stage CIII-CIV, but is determined at stage CV. The energy budget of males was very unbalanced, suggesting that the shorter lifespan often reported could be due to exhaustion of lipid stores.