RT journal article
T1 Risk of triclosan based on avoidance by the shrimp Palaemon varians in a heterogeneous contamination scenario: How sensitive is this approach?
A1 Araújo, Cristiano V. M.
A1 Gómez, Livia
A1 Silva, Daniel C.V.R.
A1 Pintado Herrera, Marina Guadalupe
A1 Lara Martín, Pablo Antonio
A1 Hampel, Miriam
A1 Blasco, Julián
A2 Química Física
K1 Avoidance
K1 HC5
K1 HeMHAS
K1 Marine shrimps
K1 Sensitivity profile
K1 Species sensitive distribution
AB As the exposure of organisms to contaminants can provoke harmful effects, some organisms try to avoid a continuous exposure by using different strategies. The aim of the current study was to assess the ability of the shrimp Palaemon varians to detect a triclosan gradient and escape to less contaminated areas. Two multi-compartmented exposure systems (the linear system and the HeMHAS-Heterogeneous Multi-Habitat Assay System) were used and then results were compared. Finally, it was aimed how sensitive the avoidance response is by comparing it with other endpoints through a sensitivity profile by biological groups and the species sensitive distribution. The distribution of the shrimps along the triclosan gradient was dependent on the concentrations, not exceeding 3% for 54 μg/L in the linear system and 7% for 81 μg/L in the HeMHAS; 25% of organisms preferred the compartment with the lowest concentrations in both systems. Half of the population seems to avoid concentrations around 40–50 μg/L. The triclosan concentration that might start (threshold) to trigger an important avoidance (around 20%) was estimated to be of 18 μg/L. The profile of sensitivity to triclosan showed that avoidance by shrimps was less sensitive than microalgae growth and avoidance by guppy; however, it might occur even at concentrations considered safe for more than 95% of the species. In summary, (i) the HeMHAS proved to be a suitable system to simulate heterogeneous contamination scenarios, (ii) triclosan triggered the avoidance response in P. varians, and (iii) the avoidance was very sensitive compared to other ecotoxicological responses.
PB ELSEVIER
SN 0045-6535
YR 2019
FD 2019-11
LK http://hdl.handle.net/10498/30308
UL http://hdl.handle.net/10498/30308
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026