2024-03-29T14:53:13Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/177612020-11-19T07:56:46Zcom_10261_123com_10261_8col_10261_376
Trophic ecology of the swimming crab Polybius henslowii Leach, 1820 in Galician and Cantabrian Seas: Influences of natural variability and the Prestige oil spill
Signa, G.
Cartes, Joan Enric
Solé, Montserrat
Serrano, Alberto
Sánchez, Francisco
Portunid crab
Prestige
Stomach content
Upwelling
NAO
Biomarkers
Spain
Galicia
9 pages, 9 figures, 2 tables.-- Printed version published Nov 15, 2008.
Diet and feeding intensity of the portunid crab Polybius henslowii were studied during the spring of 2004 along Galician and Cantabrian continental shelves (NW Iberian Peninsula) between 78 and 287 m. The area had been affected by the Prestige oil spill in November 2002, with different sectors at different levels of pollution: highest in between Miño River and Cape Finisterre (MF) and from there to Estaca de Bares Point (FE) and lowest from Estaca to Cape Peñas (EP). From 37272 specimens collected in 59 bottom hauls, 342 were analysed for stomach fullness and diet composition. Stomach fullness was lower in FE, but with no significant differences among sectors. Diet was a mixture of pelagic and benthic prey: cephalopods (Ilex coindetti), brachyurans (P. henslowii) and polychaetes (Glycera sp.). Other prey were beloniform eggs and fish remains. Two stress markers were also studied in some specimens: Acetylcholinesterase (a neurotoxicity marker) varied among sampled areas, while lipid peroxidation (an oxidative stress marker) did not. Changes in trophic variables, distribution and density were analysed in relation to depth, surface and bottom T, surface Chl a from satellite imagery and tar aggregate concentration in sediments. Along Galician and Cantabrian coasts prey availability, linked to productivity level, seems to be the main factor affecting P. henslowii diet and distribution. Interannual abundance variability seems to be controlled by large-scale climatic conditions (NAO index). This natural variability masks possible effects induced by the oil spill.
2009-10-19T12:01:06Z
2009-10-19T12:01:06Z
2008-11
artículo
Continental Shelf Research 28(19): 2659-2667 (2008)
0278-4343
http://hdl.handle.net/10261/17761
10.1016/j.csr.2008.08.008
eng
https://doi.org/10.1016/j.csr.2008.08.008
closedAccess
Elsevier