Juvenile fish habitat requirements in changing coastal ecosystems

De Raedemaecker, F.; Brophy, D.; O’Connor, I.; Mc Grath, D.

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Juvenile fish habitat requirements in changing coastal ecosystems

De Raedemaecker, F.; Brophy, D.; O’Connor, I.; Mc Grath, D. (2009). Juvenile fish habitat requirements in changing coastal ecosystems, in: 7^th annual EPA Doctoral and Post-doc Seminar, 12-13 November 2009, Dublin, Ireland.

In: (2009). 7^th annual EPA Doctoral and Post-doc Seminar, 12-13 November 2009, Dublin, Ireland. EPA: [s.l.].

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VLIZ: Open Marine Archive 236782 [ download pdf ]
Documenttype: Samenvatting

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Marien/Kust

Author keywords

juvenile flatfish; habitat characteristics; growth and condition; modelling; Ireland

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De Raedemaecker, F. Brophy, D. O’Connor, I. Mc Grath, D.

Abstract

This project aims to develop a model of juvenile flatfish habitat requirements using field surveys and controlled experiments. Distribution and abundance of juvenile flatfish is assessed in relation to biotic and abiotic habitat features within the greater Galway Bay area. GIS and statistical models are used to create habitat maps and characterise “essential fish habitat” for these species. Habitat features associated with optimal growth are identified using otolith growth rates and morphometric condition indices. To date the analysis has revealed that small-scale variation in density and condition of plaice and dab is mostly explained by physical factors (depth, organic content, substrate, temperature). Predator/prey abundances and the interaction between physical and biological factors also affect habitat choice and condition.

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