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Mignucci A, Bourjea J, Forget F, Allal H, Dutto G, Gasset E, McKenzie DJ. Cardiac and behavioural responses to hypoxia and warming in free-swimming gilthead seabream, Sparus aurata. J Exp Biol 2021; 224:271040. [PMID: 34308993 DOI: 10.1242/jeb.242397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 06/16/2021] [Indexed: 11/20/2022]
Abstract
Gilthead seabream were equipped with intraperitoneal biologging tags to investigate cardiac responses to hypoxia and warming, comparing when fish were either swimming freely in a tank with conspecifics or confined to individual respirometers. After tag implantation under anaesthesia, heart rate (fH) required 60 h to recover to a stable value in a holding tank. Subsequently, when undisturbed under control conditions (normoxia, 21°C), mean fH was always significantly lower in the tank than in the respirometers. In progressive hypoxia (100% to 15% oxygen saturation), mean fH in the tank was significantly lower than in the respirometers at oxygen levels down to 40%, with significant bradycardia in both holding conditions below this level. Simultaneous logging of tri-axial body acceleration revealed that spontaneous activity, inferred as the variance of external acceleration (VARm), was low and invariant in hypoxia. Warming (21 to 31°C) caused progressive tachycardia with no differences in fH between holding conditions. Mean VARm was, however, significantly higher in the tank during warming, with a positive relationship between VARm and fH across all temperatures. Therefore, spontaneous activity contributed to raising fH of fish in the tank during warming. Mean fH in respirometers had a highly significant linear relationship with mean rates of oxygen uptake, considering data from hypoxia and warming together. The high fH of confined seabream indicates that respirometry techniques may bias estimates of metabolic traits in some fishes, and that biologging on free-swimming fish will provide more reliable insight into cardiac and behavioural responses to environmental stressors by fish in their natural environment.
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Affiliation(s)
- Alexandre Mignucci
- MARBEC, Université de Montpelier, CNRS, IRD, Ifremer, 34200 Sète, France
| | - Jérôme Bourjea
- MARBEC, Université de Montpelier, CNRS, IRD, Ifremer, 34200 Sète, France
| | - Fabien Forget
- MARBEC, Université de Montpelier, CNRS, IRD, Ifremer, 34200 Sète, France
| | - Hossein Allal
- CHU de Montpellier, Service Chirurgie Pédiatrique, 34000 Montpellier, France
| | - Gilbert Dutto
- MARBEC, Université de Montpellier, CNRS, IRD, Ifremer, 34250, Palavas-les-Flots, France
| | - Eric Gasset
- MARBEC, Université de Montpellier, CNRS, IRD, Ifremer, 34250, Palavas-les-Flots, France
| | - David J McKenzie
- MARBEC, Université de Montpellier, CNRS, IRD, Ifremer, 34095 Montpellier, France
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Bertucci F, Jacob H, Mignucci A, Gache C, Roux N, Besson M, Berthe C, Metian M, Lecchini D. Decreased retention of olfactory predator recognition in juvenile surgeon fish exposed to pesticide. Chemosphere 2018; 208:469-475. [PMID: 29886335 DOI: 10.1016/j.chemosphere.2018.06.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 06/01/2018] [Accepted: 06/03/2018] [Indexed: 06/08/2023]
Abstract
Dory, the animated surgeonfish created by the Pixar Animation studios, famously suffered from short-term memory loss leading to many adventures. In reality, many fishes have excellent cognitive abilities and are able to learn and retain important information such as the identity of predators. However, if and how cognition can be affected by anthropogenically altered oceanic conditions is poorly understood. Here, we examine the effect of a widely used pesticide, chlorpyrifos, on the retention of acquired predator recognition in post-larval stage of the surgeonfish Acanthurus triostegus. Through associative learning, post-larvae of A. triostegus were first observed to forage significantly less in the presence of conspecific alarm cues and alarm cues associated to a predator's odor. The retention of this anti-predator behavior was estimated to last between 2 and 5 days in the absence of pesticide. However, environmentally-relevant concentrations of chlorpyrifos (1 μg.L-1) induced the loss of this acquired predator recognition. This reduced ability to recognize learned predators is discussed as it may lead to more vulnerable fish communities in coastal areas subjected to organophosphate pesticide pollution.
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Affiliation(s)
- Frédéric Bertucci
- PSL University Paris, EPHE-UPVD-CNRS, USR3278 CRIOBE, 98729 Papetoai, Moorea, French Polynesia; Laboratoire de Morphologie Fonctionnelle et Evolutive, Université de Liège, Campus Sart Tilman, Bât. B6c, Allée de la Chimie 3, 4000 Liège, Belgium.
| | - Hugo Jacob
- PSL University Paris, EPHE-UPVD-CNRS, USR3278 CRIOBE, 98729 Papetoai, Moorea, French Polynesia; International Atomic Energy Agency, Environment Laboratories, 4a, Quai Antoine 1er, Principality of Monaco, Monaco
| | - Alexandre Mignucci
- PSL University Paris, EPHE-UPVD-CNRS, USR3278 CRIOBE, 98729 Papetoai, Moorea, French Polynesia
| | - Camille Gache
- PSL University Paris, EPHE-UPVD-CNRS, USR3278 CRIOBE, 98729 Papetoai, Moorea, French Polynesia
| | - Natacha Roux
- PSL University Paris, EPHE-UPVD-CNRS, USR3278 CRIOBE, 98729 Papetoai, Moorea, French Polynesia; Observatoire Océanologique de Banyuls-sur-Mer, UMR7232, Université Pierre et Marie Curie Paris, 1 avenue du Fontaulé, 66650 Banyuls-sur-Mer, France
| | - Marc Besson
- PSL University Paris, EPHE-UPVD-CNRS, USR3278 CRIOBE, 98729 Papetoai, Moorea, French Polynesia; Observatoire Océanologique de Banyuls-sur-Mer, UMR7232, Université Pierre et Marie Curie Paris, 1 avenue du Fontaulé, 66650 Banyuls-sur-Mer, France
| | - Cécile Berthe
- PSL University Paris, EPHE-UPVD-CNRS, USR3278 CRIOBE, 98729 Papetoai, Moorea, French Polynesia
| | - Marc Metian
- International Atomic Energy Agency, Environment Laboratories, 4a, Quai Antoine 1er, Principality of Monaco, Monaco
| | - David Lecchini
- PSL University Paris, EPHE-UPVD-CNRS, USR3278 CRIOBE, 98729 Papetoai, Moorea, French Polynesia; Laboratoire d'Excellence "CORAIL", Moorea, French Polynesia
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