Picture map of Europe with pins indicating European capital cities

Open Access research with a European policy impact...

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 Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

Explore research outputs by the European Policies Research Centre...

Life-cycle synchrony in a marine copepod

Hind, A. and Gurney, William (1998) Life-cycle synchrony in a marine copepod. Ergebnisse der Limnologie (52). pp. 327-337. ISSN 0071-1128

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

It is clearly advantageous to an organism in a periodically varying environment to synchronise its life-cycle to that variation. Previous studies have demonstrated an effective mechanism by which such entrainment occurs at the individual level, through the response of development rate to varying conditions. It has been shown that synchrony requires two or more life stages that have characteristic and different developmental responses to the environment. One such difference, that has been shown to promote synchrony, is a stage specific period of arrested development (quiescence or diapause). Since the marine copepod Calanus finmarchicus undergoes just such a period of diapause, we test whether this provides a mechanism for synchrony. Using a simple model of the life-cycle we show that in the absence of diapause a population in Malangen Fjord, Norway, is unable to achieve synchrony. We then demonstrate the effectiveness of diapause in copepodite stage five in inducing entrainment. The timing of diapause is critical in determining the number of generations per year. The study highlights the importance of increasing our knowledge of Calanus finmarchicus diapause in order that we may better understand its ecology. We conclude that for this marine copepod diapause may play an important part in entraining its life-cycle to environmental periodicity.