Publication: In vitro acute toxicity of anionic
surfactant linear alkylbenzene sulphonate (LAS)
on the motility of gilthead (Sparus aurata L.) sperm
Authors
Rosety, M.A. ; Ordóñez Muñoz, F.J. ; Rosety-Rodriguez, M. ; Rosety, J.M. ; Rosety, I.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
This paper describes the acute toxicity of a
known anionic surfactant, Linear Alkylbenzene
Sulphonate (LAS), on the quality of gilthead Sparus
aurata L. sperm. The parameter used to judge exposure
effectiveness was sperm motility as well as its fertilizing
ability after being combined with unexposed gilthead
eggs.
Preincubation of sperm suspensions with
concentrations of LAS of 0.1, 0.5, 1, 2 and 4 mg/L
caused decrease in sperm motility and fertilizing ability.
In this respect, percentages of motile sperm were
respectively 89.8±9.8, 81.7±16.3, 69.5±21.3, 57.1±19.1
and 21.2±10.9%. With regard to the percentage of
fertilization success, the results were 85.7±8.1,
75.1±20.2, 62.9±19.7, 52.7±19.2 and 14.2±7.9%
respectively. At concentrations of LAS of 0.5 mg/L or
higher, the differences in both percentage of motility and
fertilizing ability with controls were significant (p<5%).
Although extrapolation from the laboratory to the
field requires caution, the results of this work
demonstrated that low-level surfactant pollution may
impact directly on reproduction of the free gametes
(sperm) released into water. It may lead to a long-term
decline and eventual extinction of gilthead populations
in nature when they are located close to effluents that are
either untreated or receive inadequate secondary
treatment. It is also quite important because this species
constitutes an important link in the food chain and its
death via exposure to surfactants may imbalance the
littoral ecosystem.
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