Title | Shark critical life stage vulnerability to monthly temperature variations under climate change |
Publication Type | Journal Article |
Year of Publication | 2024 |
Authors | Coulon, N, Pilet, S, Lizé, A, Lacoue-Labarthe, T, Sturbois, A, Toussaint, A, Feunteun, E, Carpentier, A |
Journal | Marine Environmental Research |
Volume | 198 |
Pagination | 106531 |
Date Published | Jan-06-2024 |
ISSN | 01411136 |
Keywords | Acidification, Ecological traits, Elasmobranch, Embryos, Global warming, Hatching success, IPCC, scenarios |
Abstract | In a 10-month experimental study, we assessed the combined impact of warming and acidification on critical life stages of small-spotted catshark (Scyliorhinus canicula). Using recently developed frameworks, we disentangled individual and group responses to two climate scenarios projected for 2100 (SSP2-4.5: Middle of the road and SSP5-8.5: Fossil-fueled Development). Seasonal temperature fluctuations revealed the acute vulnerability of embryos to summer temperatures, with hatching success ranging from 82% for the control and SSP2-4.5 treatments to only 11% for the SSP5-8.5 treatment. The death of embryos was preceded by distinct individual growth trajectories between the treatments, and also revealed inter-individual variations within treatments. Embryos with the lowest hatching success had lower yolk consumption rates, and growth rates associated with a lower energy assimilation, and almost all of them failed to transition to internal gills. Within 6 months after hatching, no additional mortality was observed due to cooler temperatures. |
DOI | 10.1016/j.marenvres.2024.106531 |
Shark critical life stage vulnerability to monthly temperature variations under climate change
Catégorie HCERES
ACL - Peer-reviewed articles
Publication coopération et recherche SUD
Non