Geographical patterns in abundance and population structure of Nephrops norvegicus and Parapenaeus longirostris (Crustacea: Decapoda) along the European Mediterranean coasts

Authors

  • Pere Abelló Institut de Ciències del Mar – CMIMA (CSIC)
  • Álvaro Abella ARPAT-GEA Area Mare
  • Angeliki Adamidou Fisheries Research Institute NAGREF
  • Stjepan Jukic-Peladic Institute of Oceanography and Fisheries
  • Porzia Maiorano Università di Bari
  • María Teresa Spedicato COISPA

DOI:

https://doi.org/10.3989/scimar.2002.66s2125

Keywords:

Nephrops norvegicus, Parapenaeus longirostris, distribution, population structure, Mediterranean Sea

Abstract


The main characteristics concerning distribution, size structure and total mortality of two of the most important decapod crustaceans of commercial interest in the Mediterranean Sea, Nephrops norvegicus and Parapenaeus longirostris, are studied along the European Mediterranean coasts. The study is based on data collected during a series of six trawl surveys performed in spring from 1994 to 1999 from the Gibraltar Straits to the Aegean Sea. The population size structure identified in the different geographical sectors is analysed taking into account two bathymetric sectors: continental shelf and upper slope. Differences in N. norvegicus population demographic structure among geographical sectors, as well as in total mortality, appear to be highly related to different exploitation levels. Size structure in P. longirostris also shows a great heterogeneity throughout the different geographical sectors. Considering that both species are heavily exploited all along the studied area, the observed differences can be interpreted as different responses to exploitation related to the widely differing life history characteristics of the mentioned species. In fact, N. norvegicus is a long-lived, benthic, burrowing species with low growth and mortality rates, and P. longirostris an epibenthic short-lived species characterised by higher rates of growth and mortality.

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Published

2002-06-30

How to Cite

1.
Abelló P, Abella Álvaro, Adamidou A, Jukic-Peladic S, Maiorano P, Spedicato MT. Geographical patterns in abundance and population structure of Nephrops norvegicus and Parapenaeus longirostris (Crustacea: Decapoda) along the European Mediterranean coasts. scimar [Internet]. 2002Jun.30 [cited 2020Nov.25];66(S2):125-41. Available from: http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/612

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