Influence of high temperature on cadmium-induced skeletal deformities in juvenile mosquitofish (<Emphasis Type="Italic">Gambusia affinis</Emphasis>) |
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Authors: | Asma Sassi Ali Annabi Kaouthar Kessabi Abdelhamid Kerkeni Khaled Saïd Imed Messaoudi |
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Institution: | 1.UR 09/30: Génétique, Biodiversité et Valorisation des Bioressources, Institut de Biotechnologie,Monastir,Tunisia;2.Eléments Trace, Radicaux Libres, Systèmes Antioxydants et Pathologies Humaines et Environnement, Faculté de Médecine,Monastir,Tunisia |
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Abstract: | The aim of this study was to assess the effect of high temperature on cadmium (Cd)-induced skeletal deformities in juvenile
Mosquitofish, Gambusia affinis. For this purpose, 188 juveniles (1 day old) were equally divided into the control group, which was maintained in Cd-free
water at 24°C, and three treated groups exposed either to Cd (0.4 mg/l as Cd Cl2) at 24°C, to high temperature (32°C), or to Cd at 32°C for 30 days. The results showed that Cd exposure at 24°C significantly
increased the Cd accumulation (P < 0.0001) in the whole tissues of juveniles as well as the incidence of skeletal deformities (P < 0.01) compared with control animals. Exposure to high temperature also led to a significant increase in the incidence of
skeletal deformities (P < 0.01) with respect to the control group. Interestingly, our results showed that the combined exposure to Cd and high temperature
led to a more significant increase in Cd accumulation and in the frequency of spinal deformities than exposure to Cd or high
temperature alone. These results confirm that temperature increases Cd toxicity and needs to be taken into account for the
accurate prediction and assessment of Cd-induced spinal deformities in fish. |
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