UPSIDE

Ultraviolet (UV) radiation, especially UV-B radiation, can have detrimental effects on marine larvae and elicit behavioral changes in many adult marine organisms. Although there has been some research on marine organisms, little is known about the consequences of exposure to UV-B radiation during development in cephalopod embryo, especially our model, Sepia officinalis which lays its eggs in the intertidal area. In association with the marine biological station of ROSCOFF (Center of Biological Ressources-EMBRC)/Sorbonne University, we will test the role of the capsule in the protection of the embryo by exposing eggs with black/white or without capsule to different % of UV-B. The consequences of UV-B radiation on hatch rate, mortality and malformation will be studied. We will characterize the different pigments in capsule, determine their potential protective effects, quantify the effect of UV on expression of photosensitive receptors gene and oxidative stress gene expression, with or without capsule. 

Funding: IDEX –SU Emergence

Project coordinator: Laure Bonnaud-Ponticelli, Pr. MNHN, laure.bonnaud@mnhn.fr