Coastal reproduction areas – fish as part of the VELMU programme
The aim of the project is to develop appropriate methods for mapping spawning and larval areas in Finnish coastal regions and to produce maps of reproduction areas.
|Shallow sandy beaches are typical growth and development areas for whitefish larvae. Whitefish larvae were found on both sides of the sandbank in the picture, but they do not occur on all sandy beaches. This project aims to find out why. Photo: Lauri Urho|
Fish reproduction areas are usually limited and play a critical role in determining stock size. They are also often sensitive to environmental changes. Reproduction areas should be taken into account when planning and implementing actions that may change fresh water, marine and coastal areas.
This project, part of the VELMU inventory project includes the following:
- mapping of coastal reproduction areas and development of cost-effective mapping methods;
- Comparison and development of catching methods used for mapping purposes
- Production of information primarily on spawning grounds and larval areas of commercially exploitable fish species via remote sensing and field sampling;
- Production of maps of the principal reproduction areas with the help of models, data on verified reproduction areas and environmental information, at first locally and later for the whole coastal area.
New and current
Field surveys on the fish reproduction habitats are continuing: in spring and summer 2010 the focus will be in the Eastern Gulf of Finland, where the reproduction areas of Baltic herring, smelt, pike, cyprinids, perch, pikeperch, whitefish and flounder are studied.
|An effort has been made to manage the recent increase in cyprinid abundance by defining the factors affecting the reproduction areas and living conditions of cyprinid fishes. Photo: Lauri Urho.|
|Do the whitefish larvae (Coregonus lavaretus) hatch too early in the current mild winters? This whitefish larva hatched in the Finnish Game and Fisheries Research Institute’s laboratory already in February in winter 2008. The project is aiming to explain does the marine spawning whitefish suffer from the warming winters, and what will happen to the whitefish catches in future. Photo: Lauri Urho.|
Scientist in charge of project
Riista- ja kalatalouden tutkimuslaitos
Viikinkaari 4, PL 2, 00791 Helsinki
Puhelin 0295 327 222
Faksi 0205 751 201
Other scientists: Lauri Urho, Heikki Auvinen, Richard Hudd, Meri Kallasvuo, Lari Veneranta