IBANOE 2012-1

Name: IBANOE 2012-1
Start: 2012-01-31
End: 2012-02-09
Location: Southwest Pacific Ocean (140W)

Type	Oceanographic cruise
Ship	Alis
Ship owner	IRD
Dates	31/01/2012 - 09/02/2012
Chief scientist(s)	LORRAIN Anne
	LABORATOIRE DES SCIENCES DE L'ENVIRONNEMENT MARIN - UMR 6539 Technopôle Brest-Iroise Rue Dumont d'Urville 29280 Plouzané +33(0)2 98 49 86 40 https://www-iuem.univ-brest.fr/lemar/
DOI	10.17600/12100010
Objective	The ambition of the IBANOE project is to develop new tools for monitoring and studying coastal ecosystem function by perfecting new biomarkers based on benthic invertebrates. It involves contributing to the calibration of environmental records in the shells of invertebrates through better knowledge about the day/night calcification cycles (measurements of respiration and calcification in benthic chambers). The cruise objectives were 1) to take samples of invertebrates on sites with contrasting environments (gradients of anthropization), and then in a second phase 2) to deploy benthic chambers and subtidal sensors over 24 h cycles in order to measure the respiration and calcification of several invertebrates (queen scallops and trochus). The related project is EC2CO IBANOE.

Sea/Ocean	Southwest Pacific Ocean (140W) (Lagon sud-ouest de Nouvelle-Calédonie)
Ports	Port of departure : Noumea (New Caledonia) Port of return : Noumea (New Caledonia)
Scientific Authority	IRD CENTRE DE NOUMEA 101 promenade Roger Laroque BP A5 98848 NOUMEA CEDEX (+687) 26 10 00 nouvelle-caledonie@ird.fr https://nouvelle-caledonie.ird.fr/
Participating bodie(s)	CNRS, Université de Bretagne Occidentale (UBO), IRD
Discipline(s)	CHEMICAL OCEANOGRAPHY BIOLOGICAL OCEANOGRAPHY
Summary of measurements	-Samples of invertebrates (pectinids, trochus, ark clams, oysters) and bottom seawater on dives, along the gradients of anthropization from the coast to the barrier-reef for later analysis of muscles and valves. -Metabolism (respiration/calcification) measured in benthic chambers on Trochus niloticus and Comptopallium radula to apprehend the day/night variations in their metabolism. -Sensors deployed in order to monitor variations in environmental parameters over 24h (temperature, oxygen, ph, salinity). Two 24h cycles performed (8 incubations for 1 hour per 24h cycle) with 4 to 8 chambers deployed per cycle. -Carbon and oxygen fluxes were measured on empty shells (without animal) for trochus that were significantly colonized by encrusting algae (calcareous algae and other epiphytes), in order to correct the values of their gross respiration. -3 trochus snails were fitted with accelerometers to determine the species' rhythm of activity and movements over 24h.
Location map
Positionning system	Geodetic system : WORLD GEODETIC SYSTEM 1984 = WGS84 Positioning system : GPS naturel

Data managed by SISMER

Bibliography

Publications

Lorrain A., Clavier J., Thebault J., Tremblay-Boyer L., Houlbreque F., Amice E., Le Goff M., Chauvaud L. (2015). Variability in diel and seasonal in situ metabolism of the tropical gastropod Tectus niloticus. Aquatic Biology, 23(2), 167-182. Publisher's official version : https://doi.org/10.3354/ab00618 , Open Access version : https://archimer.ifremer.fr/doc/00256/36675/