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Factors influencing the sensitivity of Gammarus aequicauda population from Mar Piccolo in Taranto (Southern Italy)
- Source :
- Ecotoxicology & Environmental Safety; Mar2009, Vol. 72 Issue 3, p770-774, 5p
- Publication Year :
- 2009
-
Abstract
- Laboratory experiments were performed on the amphipod Gammarus aequicauda in order to evaluate the relationship between the seasonal sensitivity to a reference toxicant and seasonal lipid content, temperature and algal biomass. The organisms were collected in a clean site in the Mar Piccolo of Taranto (Ionian sea) from March 2003 to February 2004. The total lipid content of G. aequicauda varied from 5.5% in spring to a maximum of 19% in autumn, then decreased until reaching 9.8% of dry weight in winter. Triacyglycerols (TG) were the most abundant lipid class in G. aequicauda, except in spring, when there was a higher percentage of phospholipids (PL). Sterol levels were lower. The sensitivity of G. aequicauda during different seasons was significantly affected by total lipids (r=0.97; p<0.01), but no relationship was found with algal biomass (r=0.21; p>0.05) and temperature (r=0.29; p>0.05). The highest LC<subscript>50</subscript> values appeared with an increase of total lipids. This study will be used to improve the interpretation of ecotoxicological test results with G. aequicauda. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01476513
- Volume :
- 72
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Ecotoxicology & Environmental Safety
- Publication Type :
- Academic Journal
- Accession number :
- 36434109
- Full Text :
- https://doi.org/10.1016/j.ecoenv.2007.12.020