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Hydrobiologia

, Volume 612, Issue 1, pp 99–107 | Cite as

Identification of deep-water pink shrimp abundance distribution patterns and nursery grounds in the eastern Mediterranean by means of generalized additive modelling

  • Chrissi-Yianna Politou
  • George Tserpes
  • John Dokos
FISH HABITAT MAPPING

Abstract

Generalized Additive Modelling (GAM) techniques were used to model the time series of abundance data of deep-water pink shrimp, collected during the MEDITS bottom trawl surveys carried out in the Greek seas from 1996 to 2006, as functions of the sampling location (longitude–latitude), depth and year. The life stages of the species were taken into account. All variables were highly significant, although latitude and depth had always the highest explanatory power. The total abundance was higher between 100 and 400 m of depth, with juveniles and adults being more abundant in the 100–200 m and 200–400 m depth strata, respectively. GAM prediction maps showed high abundance concentration areas for all life stages mainly in the Aegean Sea. The most important nursery ground identified was located in the Saronikos Gulf and a secondary in the Thracian Sea. Concerning the concentration areas of the adult specimens, they are located mainly in the Saronikos Gulf, the Thracian Sea, the Thermaikos Gulf, the Cretan Sea and the eastern part of the Aegean.

Keywords

Deep-water pink shrimp Mediterranean Distribution Nurseries Generalized Additive Models 

Notes

Acknowledgement

The authors wish to express their appreciation to all participants in the MEDITS-GR cruises and the working groups involved in the project.

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Chrissi-Yianna Politou
    • 1
  • George Tserpes
    • 2
  • John Dokos
    • 1
  1. 1.Institute of Marine Biological Resources, Hellenic Centre for Marine ResearchHellinikoGreece
  2. 2.Institute of Marine Biological Resources, Hellenic Centre for Marine ResearchHeraklion CreteGreece

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