Effect of temperature and CO2 concentration on the morphogenesis of sagittal otoliths in Atlantic herring (Clupea harengus) larvae

• Published in: Journal of Experimental Marine Biology and Ecology
• Main Authors: Mahé, Kelig, Joly, Lea, Telliez, Solene, Zambonino Infante, Jose-Luis, Meunier Cédric, Léo, Mackenzie, Kirsteen, Giraldo, Carolina
• Other Authors: Unité Halieutique Manche Mer du Nord (HMMN), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Ressources Halieutiques de Boulogne (LRHBL), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Alfred Wegener Institute for Polar and Marine Research (AWI)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2023
• Subjects: Otolith shape; Otolith area; Temperature effect; Ocean acidification; Elliptic Fourier descriptors; Directional asymmetry; [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery; [SDE.MCG]Environmental Sciences/Global Changes
• Online Access: https://hal.univ-brest.fr/hal-04032490; https://hal.univ-brest.fr/hal-04032490/document; https://hal.univ-brest.fr/hal-04032490/file/1-s2.0-S002209812200137X-am.pdf; https://doi.org/10.1016/j.jembe.2022.151829

International audience Otoliths are very useful biomarkers especially for fish growth. Climate change with the associated global changesin warming and acidification could affect the calcification and the shape of otoliths during the crucial larvalperiod in teleost fish. To evaluate this predicted combined effect of temperature and CO2, Atlantic herring(Clupea harengus) embryos and larvae were reared from hatching to respectively 47 and 60 days post-hatching(dph), under present day conditions and a scenario predicted for the year 2100 (IPCC RCP8.5). Otolithmorphogenesis was tracked by analyzing area and normalized Elliptical Fourier coefficients. We found thatotolith area for fish of similar size increased under the predicted 2100 climate change scenario compared to thepresent day. Climate change does not, however, seem to directly affect the otolith shape. Finally, the onset ofotolith morphogenesis is hardwired, but the relationship between otolith and fish size is environment-dependent.