Optimal foraging and diel vertical migration in a life history model

Research output: Contribution to conferencePosterResearch

Abstract

Zooplankton such as copepods are known to perform diel vertical migration, avoiding the food rich surface during bright hours to avoid visual predator when they are most dangerous, and returning to the surface to feed at night. The resolution of this foraging behaviour requires fine time scale in the model,
unsuited for life history modeling. We propose a method based on optimal foraging theory to take into account the emergent feeding rates as a function of the copepod metabolic cost, latitude, time and predation. We predict that copepods will balance their growth rate and mortality, playing a safe strategy
when food is plentiful, but taking greater risks at low food concentrations. We apply these concepts to high latitude ecosystems where there is a strong seasonal variation in both food availability and day length. Specifically, during the summer, the midnight sun will force the animals to take more risk and maintain some feeding at the surface to cover their nutritional needs, compensate for predation mortality and sustain their growth
Original languageEnglish
Publication date2013
Publication statusPublished - 2013
EventASLO 2013 Aquatic Sciences Meeting: Learning for the future - Ernest N. Morial Convention Center, New Orleans, United States
Duration: 17 Feb 201322 Feb 2013
http://aslo.org/neworleans2013/

Conference

ConferenceASLO 2013 Aquatic Sciences Meeting
LocationErnest N. Morial Convention Center
CountryUnited States
CityNew Orleans
Period17/02/201322/02/2013
Internet address

Cite this

Sainmont, J., Andersen, K. H., & Visser, A. (2013). Optimal foraging and diel vertical migration in a life history model. Poster session presented at ASLO 2013 Aquatic Sciences Meeting, New Orleans, United States.