Acute and subacute toxicity of naphthalene in a filter-feeding species Styela plicata (Chordata, Ascidiacea)

Authors

  • Tahani EL AYARI University of Carthage. Faculty of Sciences of Bizerte. Laboratory of Environment Bio-monitoring (LBE). Group of Fundamental and Applied Malacology (MAF) https://orcid.org/0000-0003-2631-2099
  • Raja BEN AHMED University of Tunis El Manar. Faculty of Sciences of Tunis. Department of Biology, Ecology, Biology and physiology of Aquatic Organisms Laboratory (LR18ES41), Tunis, Tunisia https://orcid.org/0000-0002-0880-2855
  • Samir GHANNEM University of Carthage. Faculty of Sciences of Bizerte. Laboratory of Environment Bio-monitoring (LBE). Group of Fundamental and Applied Malacology (MAF) https://orcid.org/0000-0002-5171-9117
  • Najoua TRIGUI EL MENIF 1University of Carthage. Faculty of Sciences of Bizerte. Laboratory of Environment Bio-monitoring (LBE). Group of Fundamental and Applied Malacology (MAF), Bizerte, Tunisia https://orcid.org/0000-0002-6083-6630

Keywords:

Styela plicata, Ascidiacea, acute toxicity, filtration, naphthalene, aromatic hydrocarbon, Ghar El Melh lagoon, Tunisia, Mediterranean

Abstract

The aim of the current study was the assessment of a Polycyclic aromatic hydrocarbon (PAHs) toxicity on an ascidian species, Styela plicata. Acute and subacute toxicity of naphthalene (NAP) has been determined using five increasing concentrations (0.5, 1, 1.5, 2.5 and 5 mg/l) during 96h of exposure. The half lethal concentration (LC50, 96h) value of naphthalene for S. plicata was 2.41 mg/l. Furthermore, the filtration activity decreased in the five tested concentrations of NAP; a significant decrease by 69% and 91.8% was observed after 1h in the groups exposed to C1 and C5, respectively. A similar pattern was noted after 2h of filtration; the decrease was estimated to 39% in C1 and 72.5% in C5. The results from this bioassay confirmed the toxicity of NAP on S. plicata; we also provided information about the use of S. plicata as a potential bioindicator species for the assessment of PAHs toxicity.

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Published

2023-11-29

How to Cite

1.
EL AYARI T, BEN AHMED R, GHANNEM S, TRIGUI EL MENIF N. Acute and subacute toxicity of naphthalene in a filter-feeding species Styela plicata (Chordata, Ascidiacea). Bull. Inst. Natl. Sci. Technol. Mer [Internet]. 2023Nov.29 [cited 2024Mar.3];48:79-85. Available from: https://www.instm-bulletin.tn/index.php/bulletin/article/view/1570

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