WP 2: Impact of exogenous processes on recruitment dynamics

juvenile sprat; Foto and Copyright©: Daniel Stepputtis, Rostock (Germany)

This WP will examine the biological and oceanographic basis for the survival and developmental success of eggs, larvae and early juveniles. Initially, available data and information on the target stocks will be collated to produce historical time series of environmental proxies and variables affecting recruitment. This includes ecosystem specific data on abiotic and biotic conditions affecting survival and development including e.g. temperature, prey and predator abundances (cooperation with WP3), and ocean circulation. It also requires spatially and temporally resolved time series of the realized egg production, information about the timing and location of spawning both derived from WP1 as well as data on the abundance and distribution of larvae and young-of-the-year juveniles.

Objectives:

  1. Increase understanding of processes affecting recruitment of target fish species.
  2. Describe and quantify links between historical variations in recruitment, egg production, spawner demographics and environmental variability.
  3. Evaluate using process knowledge the sensitivity of recruitment to variations in egg production, spawner demographics and environmental variability.

Read more: Description of work in WP 2