LA PEROUSE

Type Oceanographic cruise
Ship Antea
Ship owner IRD
Dates 15/09/2016 - 30/09/2016
Chief scientist(s) MARSAC Francis ORCID

MARINE BIODIVERSITÉ, EXPLOITATION ET CONSERVATION - UMR - SÈTE

Avenue Jean Monnet

CS 30171

34203 Sète Cedex

33 (0)4 99 57 32 00

https://umr-marbec.fr/
DOI 10.17600/16004500
Objective This cruise studied an underwater relief, the La Pérouse seamount, located 90 nautical miles to the NW of Reunion Island, culminating at 52 m from the surface. The operations aimed to study the physical and biological environment associated with this seamount, in order to assess the possible impact on productivity, within a zone which is generally qualified as oligotrophic, set at the centre of the South Equatorial Current. The main objectives were to: 1) Produce an accurate bathymetric survey of the seamount; 2) Characterize the physical processes leading to enrichment of the first trophic levels near a seamount; 3) Assess the spatial-temporal density and faunal diversity of micronekton making up the fodder fauna for higher predators; 4) Take a rapid inventory of demersal fish diversity on the slopes of the seamount; 5) Analyze the food web levels of a seamount ecosystem, principally in the pelagic realm. The related project is "seamount ecosystems in the South-West Indian Ocean", one of the components of the WIOURI (West Indian Ocean Upwelling Regional Initiative) project in the international IIOE-2 (International Indian Ocean Expedition 2) programme. The regional division for research and technology of Reunion Island granted substantial funding to cover operating costs (excluding vessel) for the cruise. The fleet joint service unit UMS Flotte also provided financial support, which we are grateful for.

Data managed by SISMER

Bibliography

Publications

Annasawmy Pavanee, Bustamante Paco, Point David, Churlaud Carine, Romanov Evgeny V., Bodin Nathalie (2022). Trace elements and δ15N values in micronekton of the south-western Indian Ocean. Marine Pollution Bulletin, 184, 114053 (16p.). Publisher's official version : https://doi.org/10.1016/j.marpolbul.2022.114053 , Open Access version : https://archimer.ifremer.fr/doc/00811/92284/


Annasawmy Pavanee, Point David, Romanov Evgeny V., Bodin Nathalie (2022). Mercury concentrations and stable isotope ratios (δ13C and δ15N) in pelagic nekton assemblages of the south-western Indian Ocean. Marine Pollution Bulletin, 174, 113151 (16p.). Publisher's official version : https://doi.org/10.1016/j.marpolbul.2021.113151 , Open Access version : https://archimer.ifremer.fr/doc/00811/92286/


Romanov Evgeny V., Cherel Yves, Marsac Francis (2021). New record of Ectreposebastes niger (Fourmanoir, 1971) (Setarchidae, Scorpaeniformes): a rare bathypelagic fish from La Pérouse Seamount, Western Indian Ocean, and distribution of Ectreposebastes Garman, 1899 in the Indian Ocean. Zoosystema, 43(15), 283-296. Publisher's official version : https://doi.org/10.5252/zoosystema2021v43a15 , Open Access version : https://archimer.ifremer.fr/doc/00700/81172/


Le Croizier Gaël, Lorrain Anne, Sonke Jeroen E., Jaquemet Sébastien, Schaal Gauthier, Renedo Marina, Besnard Lucien, Cherel Yves, Point David (2020). Mercury isotopes as tracers of ecology and metabolism in two sympatric shark species. Environmental Pollution, 265(Part B), 114931 (11p.). Publisher's official version : https://doi.org/10.1016/j.envpol.2020.114931 , Open Access version : https://archimer.ifremer.fr/doc/00633/74465/


Noyon Margaux, Rasoloarijao Zo, Huggett Jenny, Ternon Jean-Francois, Roberts Michael (2020). Comparison of mesozooplankton communities at three shallow seamounts in the South West Indian Ocean. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104759 (17p.). Publisher's official version : https://doi.org/10.1016/j.dsr2.2020.104759 , Open Access version : https://archimer.ifremer.fr/doc/00609/72157/


Marsac Francis, Annasawmy Pavanee, Noyon Margaux, Demarcq Herve, Soria Marc, Rabearisoa Njaratiana, Bach Pascal, Cherel Yves, Grelet Jacques, Romanov Evgeny (2020). Seamount effect on circulation and distribution of ocean taxa in the vicinity of La Pérouse, a shallow seamount in the southwestern Indian Ocean. Deep-sea Research Part Ii-topical Studies In Oceanography, 176, 104806 (18p.). Publisher's official version : https://doi.org/10.1016/j.dsr2.2020.104806 , Open Access version : https://archimer.ifremer.fr/doc/00631/74286/


Annasawmy Pavanee, Ternon Jean-Francois, Cotel Pascal, Cherel Yves, Romanov Evgeny V., Roudaut Gildas, Lebourges-Dhaussy Anne, Ménard Fréderic, Marsac Francis (2019). Micronekton distributions and assemblages at two shallow seamounts of the south-western Indian Ocean: Insights from acoustics and mesopelagic trawl data. Progress In Oceanography, 178, 102161 (21p.). Publisher's official version : https://doi.org/10.1016/j.pocean.2019.102161 , Open Access version : https://archimer.ifremer.fr/doc/00510/62135/


Thesis using campaign data

Annasawmy Pavanee (2019). Structures des communautés micronectoniques en relation avec les conditions environnementales à deux monts sous-marins peu profonds du sud-ouest de l'Océan Indien / Patterns among micronekton communities in relation to the environmental conditions at two shalow seamounts in the south-western Indian Ocean. PhD Thesis, Université de Montpellier, University of Cape Town.