Identifying essential fish habitat for small pelagic species in Spanish Mediterranean waters

Jose M Bellido-Millan, Alex M. Brown, Vasilis D. Valavanis, Ana Giraldez, Graham John Pierce, Magdalena Iglesias, Andreas Palialexis

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Populations of small pelagic fish support important fisheries in Spanish Mediterranean waters, particularly sardine (Sardina pilchardus) and anchovy (Engraulis encrasicolus), and are distributed along the entire length of the Spanish continental shelf. Using annual acoustic survey data for the years 2003-2005, a GIS-based environmental modelling approach was used to investigate the distribution and abundance of small pelagic fish in relation to environmental variables. Multivariate analysis was applied to provide a preliminary picture of relationships between fish and environmental conditions, followed by application of Generalised Additive Models (GAMs). GAMs showed the presence/absence of fish to be related to bathymetry, sea surface chlorophyll-a concentration and sea surface temperature (SST). The strength and significance of these relationships varied spatially and temporally. High resolution Essential Fish Habitat (EFH) maps were generated for sardine and anchovy, based on the predicted probability of presence of each species. Substantial inter-annual variability in the distribution and quality of EFH was observed, particularly for anchovy. Identification of EFH is of great importance to assess and manage sardine and anchovy resources as it provides a natural link between population dynamics features and geographical scenarios.

Original languageEnglish
Pages (from-to)171-184
Number of pages14
JournalHydrobiologia
Volume612
Issue number1
DOIs
Publication statusPublished - Oct 2008

Keywords

  • anchovy
  • sardine
  • essential fish habitat
  • environment
  • Mediterranean
  • spatial-distribution
  • engraulis-encrasicolus
  • Solea-Solea
  • Alboran SEA
  • GIS
  • circulation
  • dynamcs
  • temperature
  • Anchovy
  • Sardine
  • essential Fish Habitat
  • Environment

Cite this

Bellido-Millan, J. M., Brown, A. M., Valavanis, V. D., Giraldez, A., Pierce, G. J., Iglesias, M., & Palialexis, A. (2008). Identifying essential fish habitat for small pelagic species in Spanish Mediterranean waters. Hydrobiologia, 612(1), 171-184. https://doi.org/10.1007/s10750-008-9481-2