Olivier Derridj

Marine Biodiversity Exploitation and Conservation

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Co-Authors

Sylvain Bonhommeau

Ifremer

Tristan Rouyer

Ifremer

Vincent Kerzérho

Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier

Bertrand Wendling

Station d’Écologie Théorique et Expérimentale

Serge Bernard

Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier

Simeon Deguara

University of Malta

David J. McKenzie

Centre National de la Recherche Scientifique

Fabien Forget

Marine Biodiversity Exploitation and Conservation

Alexandre Mignucci

Marine Biodiversity Exploitation and Conservation

ÁB

Ásgeir Bjarnason

American College of Sports Medicine

Cooperative Institutions

Université de Montpellier

Centre National de la Recherche Scientifique

Ifremer

Marine Biodiversity Exploitation and Conservation

Institut de Recherche pour le Développement

Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier

Setec (France)

Institut Français

Laboratoire de Conception et d'Intégration des Systèmes

Écologie Marine Tropicale des Océans Pacifique et Indien

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A novel protocol for rapid deployment of heart rate data storage tags in Atlantic bluefin tuna Thunnus thynnus reveals cardiac responses to temperature and feeding

Journal of Fish Biology (2023)

Tristan Rouyer Sylvain Bonhommeau Serge Bernard Vincent Kerzérho Olivier Derridj

The Atlantic bluefin tuna (ABFT) is a highly prized species of large pelagic fish. Studies of their environmental physiology may improve understanding and management of their populations, but this is difficult for mature adults because of their large size. Biologging of heart rate holds promise in investigating physiological responses to environmental conditions in free-swimming fishes but it is very challenging to anesthetize large ABFT for invasive surgery to place a tag in the body cavity near to the heart. We describe a novel method for rapid deployment of a commercially available heart-rate tag on ABFT, using an atraumatic trocar to implant it in the musculature associated with the cleithrum. We performed three sequential experiments to show that the tagging method (1) is consistently repeatable and reliable, (2) can be used successfully on commercial fishing boats and does not seem to affect fish survival, and (3) is effective for long-term deployments. In experiment 3, a tag logged heart rate over 80 days on a 60-kg ABFT held in a farm cage. The logged data showed that heart rate was sensitive to prevailing seasonal temperature and feeding events. At low temperatures, there were clear responses to feeding but these all disappeared above a threshold temperature of 25.5°C. Overall, the results show that our method is simple, rapid, and repeatable, and can be used for long-term experiments to investigate physiological responses by large ABFT to environmental conditions.

Thunnus

Scombridae

10.1111/jfb.15507

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Citations (1)

First long‐term trajectory of an ocean sunfish (Mola mola L.) from the northwestern Mediterranean

Journal of Fish Biology (2024)

Tristan Rouyer Antony Landreau Olivier Derridj Sylvain Bonhommeau R. Frejafond

Abstract The ocean sunfish is a large fish for which many aspects of its ecology and biology are still poorly known. Electronic tagging was used to provide the first information on the movements of an ocean sunfish from the northwestern Mediterranean. The sunfish moved towards the Gibraltar strait over the year and displayed substantial movements in the water column. The potential of the tagging technique employed for studying its behavior and long‐term migratory dynamics, and assessing the post‐release survival of ocean sunfish is highlighted.

10.1111/jfb.15831

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Residency, home range and inter-annual fidelity of three coastal fish species in a Mediterranean coastal lagoon

Estuarine Coastal and Shelf Science (2023)

Alexandre Mignucci Fabien Forget Rémi Villeneuve Olivier Derridj Christopher W. McKindsey

Coastal fish

10.1016/j.ecss.2023.108450

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Electronic tagging of Bluefin Tunas from the Maltese spawning ground suggests size-dependent migration dynamics

Environmental Biology of Fishes (2022)

Tristan Rouyer Serge Bernard Vincent Kerzérho Nicolas Giordano François Giordano

Thunnus

Scombridae

Maltese

10.1007/s10641-022-01262-4

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Citations (7)

The environment drives Atlantic bluefin tuna availability in the Gulf of Lions

Fisheries Oceanography (2021)

Tristan Rouyer Sylvain Bonhommeau Guilaume Bal Olivier Derridj Jean‐Marc Fromentin

Abstract Atlantic bluefin tuna (ABFT) is a migratory species whose exploitation is affected by its migratory behaviour. ABFT can be found the whole year round in the Gulf of Lions (GoL), with the exception of the May/June/July spawning season. The date at which ABFT fishing resumes in the GoL after spawning is variable and affects both the summer longline fishery and the local aerial survey used to derive a fisheries‐independent index of abundance used in the stock assessment. We investigated whether environmental conditions could explain inter‐annual variability in ABFT availability in the GoL. We focused on Sea surface temperature (SST) and northern wind events looking at changes in the ABFT summer longline fishery start date and quota completion date. Years with weaker northern wind events displayed a higher SST and were associated with a delay in ABFT catch by up to more than one month, whereas the bulk of the catch was completed earlier. A scale‐dependent analysis of the densities of ABFT schools detected during the aerial survey show consistent associations between the short‐term fluctuations in northern wind and SST and the densities of ABFT schools detected. When considering the trends these effects appeared reversed, higher SST and weaker northern wind being associated with an increase in ABFT school density. The implication of these results on the aerial survey and for the exploitation and conservation of ABFT are discussed in the light of the literature on its migratory behaviour in the context of climate change.

10.1111/fog.12532

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Citations (3)