RT journal article
T1 Avoidance behaviour of the shrimp Palaemon varians regarding a contaminant gradient of galaxolide and tonalide in seawater
A1 Ehiguese, Friday Ojie
A1 Fernández, MDCC
A1 Lara Martín, Pablo Antonio
A1 Martín Díaz, María Laura
A1 Araújo, Cristiano V.M.
A2 Química Física
AB The musk fragrances galaxolide (HHCB) and tonalide (AHTN) are compounds of emerging concern thathave been found in various environmental compartments. The present study addressed the ability ofHHCB and AHTN to elicit the avoidance response in the estuarine shrimp Palaemon varians and to predict the population immediate decline (PID) of P. varians when exposed to HHCB and AHTN by integratingboth avoidance (non-forced exposure) and lethality (forced exposure) responses. The avoidance response was tested in a non-forced multi-compartmented static system, in which the shrimps could move freely among the compartments with different concentrations. The shrimps (n ¼ 3 shrimps per compartment/ concentration; 18 shrimps per system) were exposed to a gradient (0, 0.005, 0.05, 0.5, 5 and 50 mg/L) of both substances and their positions were checked at every 20 min for a 3 h period. The results from 24-h forced exposure showed no dose-response relationship and the highest percentage mortality was 17% for HHCB at 0.005 and 0.5 mg/L. In the 3-h non-forced exposure to a gradient of HHCB and AHTN, significant concentration-dependent spatial avoidance was observed for both substances. The shrimps avoided the lowest concentration of HHCB and AHTN (0.005 mg/L) by 15% and 16%. The avoidance increased significantly (p < 0.005) to a 61% and 57%, respectively, for the highest concentration (50 mg/L). The population immediate decline was driven by the avoidance behaviour of the shrimps rather than mortality.
PB Elsevier
SN 1879-1298
YR 2019
FD 2019-05-23
LK http://hdl.handle.net/10498/34562
UL http://hdl.handle.net/10498/34562
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026