Impacts of Long-Term Exposure to Ocean Acidification and Warming on Three-Spined Stickleback (Gasterosteus aculeatus) Growth and Reproduction

Type Article
Date 2023-10
Language English
Author(s) Devergne JimmyORCID4, Loizeau VeroniqueORCID1, Lebigre ChristopheORCID2, Bado-Nilles Anne3, Collet Sophie1, Mouchel OlivierORCID1, Iaria Ugo3, Le Gall Marie-Madeleine1, Madec Lauriane1, Turiès Cyril3, Servili AriannaORCID1
Affiliation(s) 1 : Department of Biogeochemistry and Ecotoxicology, University of Brest, CNRS, IRD, Ifremer, UMR 6539, LEMAR, 29280 Plouzané, France
2 : UMR DECOD (Ecosystem Dynamics and Sustainability), IFREMER, INRAE, Institut Agro, 29280 Plouzané, France
3 : Unité d’Ecotoxicologie In Vitro et In Vivo (ECOT), Institut National de l’Environnement Industriel et des Risques (INERIS), 60550 Verneuil-en-Halatte, France
4 : Department of Biogeochemistry and Ecotoxicology, University of Brest, CNRS, IRD, Ifremer, UMR 6539, LEMAR, 29280 Plouzané, France
Source Fishes (2410-3888) (MDPI AG), 2023-10 , Vol. 8 , N. 10 , P. 523 (23p.)
DOI 10.3390/fishes8100523
Note This article belongs to the Special Issue The Impact of the Changing Environment on the Physiology of Aquatic Organisms
Keyword(s) Gasterosteus aculeatus, climate change, life cycle, sexual maturation, long-term acclimation, lipids, multi-stress
Abstract

The warming and acidification of surface waters as predicted by the IPCC leads aquatic species to face major multifaceted changes in their environment. Although teleosts have efficient regulatory systems to cope with these changes, such changes clearly have the potential to impact their physiological functions. Hence, it is crucial to estimate the ability of teleost fishes to cope with multi-stresses to predict how they will deal with future environments. In this context, we investigated the joint effect of warming and acidification on three-spined stickleback (Gasterosteus aculeatus) from the juvenile stage to adulthood, focusing on parameters linked to growth, sexual maturation, and reproduction. Juvenile sticklebacks were split in 2 climate scenarios: a “Current” scenario corresponding to the current seasonal physico-chemical parameters of the water of the “Rade de Brest” in France, and a “RCP8.5” scenario with a warming of 3 °C and an acidification of 0.4 pH units. After 7 months, fish in the RCP8.5 scenario reached the same size and mass as those in the Current scenario, but they needed greater amounts of food to reach satiety. Furthermore, the mortality rate over the experiment was higher in the RCP8.5 scenario. Muscle lipid content, an indicator of energy reserves, was lower in females in the RCP8.5 scenario, suggesting an increased need for energy to maintain homeostasis and other physiological functions or a divergence in energy allocation strategy. Moreover, females exhibited lower sexual maturation and egg quality under the RCP8.5 scenario, which could have contributed to the lower fertilisation rate observed. Males were more resilient to the RCP8.5 scenario, exhibiting only a trend for lower kidney somatic index scores. Altogether, these results suggest a delay and/or an inhibition of gametogenesis and maturation in fish in warmed and acidified waters. The analysis of blood sex steroid concentrations, brain gene expression profiles, and physiological indexes did not allow us to discriminate between a delay and an inhibition of maturation in the RCP8.5 scenario. Overall, these findings clearly indicate that there is a long-term global impact of combined acidification and warming on the mortality and reproductive performance of three-spined stickleback.

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Devergne Jimmy, Loizeau Veronique, Lebigre Christophe, Bado-Nilles Anne, Collet Sophie, Mouchel Olivier, Iaria Ugo, Le Gall Marie-Madeleine, Madec Lauriane, Turiès Cyril, Servili Arianna (2023). Impacts of Long-Term Exposure to Ocean Acidification and Warming on Three-Spined Stickleback (Gasterosteus aculeatus) Growth and Reproduction. Fishes, 8(10), 523 (23p.). Publisher's official version : https://doi.org/10.3390/fishes8100523 , Open Access version : https://archimer.ifremer.fr/doc/00857/96913/