Journal
ESTUARINE COASTAL AND SHELF SCIENCE
Volume 95, Issue 1, Pages 199-206Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ecss.2011.08.032
Keywords
prediction; pikeperch; larval; habitat; turbidity; Baltic Sea
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Funding
- Maj and Tor Nessling Foundation
- Finnish Game and Fisheries Research Institute
- Finnish Inventory Programme for the Underwater Marine Environment, VELMU
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The pikeperch (Sander lucioperca (L.)) is an economically important fish species occurring in the fresh and brackish waters of Europe. To evaluate the distribution and extent of the reproduction areas in the northern Baltic Sea, a field survey was carried out in two separate coastal areas. Presence/absence data were used to develop a geographic information system (GIS)-based predictive spatial distribution model, where high resolution raster maps of the focal environmental variables and a logistic regression equation were used to predict the probability of larval occurrence. The results indicated that the pikeperch reproduction areas are located in the innermost archipelago zone where high water turbidity best explained their presence. Turbidity was related to several other variables such as fetch and depth. Contrary to our preliminary hypothesis, surface water temperatures measured during the survey had no significant effect in the model due to the low spatial variation in the measured values. Since turbidity is possible to determine by remote sensing methods, the probability maps can be cost-effectively extended to more extensive coastal areas with proper validation. (C) 2011 Elsevier Ltd. All rights reserved.
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