BIOCYAN 4

Name: BIOCYAN 4
Start: 1987-06-02
End: 1987-06-24
Location: Northeast Atlantic Ocean (40W)

Type	Oceanographic cruise
Set	This cruise is part of the set BIOCYAN
Ship	Le Suroît
Ship owner	Ifremer
Dates	02/06/1987 - 24/06/1987
Chief scientist(s)	SIBUET Myriam
	IFREMER SIEGE 1625 route de Sainte-Anne CS 10070 29280 PLOUZANE +33(0)2 98 22 40 40 https://www.ifremer.fr/fr
DOI	10.17600/87003711
Objective	The objective of the BIOCYAN cruise is part of a programme studying the structure and functioning of the deep benthic ecosystem in a sedimentary environment, particularly in the framework of the EPI project conducted on the permanent site of Meriadzek terrace. The objectives were to study: 1) Different types of biological processes and the mechanisms involved in exchanges of matter at the water-sediment interface by developing an experimental approach and submersible instrumentation; 2) Bacterial activity by in situ incubation of tagged organic compounds; 3) Dynamics of meio- and macro-benthic populations development by long-term monitoring of the colonisation of soft substrates; 4) Metabolism and role played by megafauna in the transformation of organic matter.

Sea/Ocean

Northeast Atlantic Ocean (40W)

(ATLANTIQUE NORD EST (GOLFE DE GASCOGNE))

Scientific Authority

LABORATOIRE ENVIRONNEMENT PROFOND

Centre Ifremer Bretagne

ZI Pointe du Diable

29280 Plouzané

+33 (0)2 98.22.43.04

https://www.umr-beep.fr/

Participating bodie(s)

IFREMER, CNRS, UNIVERSITE

Discipline(s)

SUBMERSIBLE
BIOLOGICAL OCEANOGRAPHY
MARINE GEOSCIENCES

Code	Label	Quantity	PI
B37	Taggings actiniaires et echinodermes	-	SIBUET Myriam
B73	Sediment traps 1 mouillage piege a particules	-	SIBUET Myriam
B90	Other biological/fisheries meas. 4 nasses a poisson, 5 nasses a amphipodes	-	SIBUET Myriam
G04	Core soft bottom 27 carottiers tubes et 14 carottier a lames	-	SIBUET Myriam
G08	Bottom photography 60 metres (6 bobines)	-	SIBUET Myriam
Y01	Underwater photography	-	SIBUET Myriam

Summary of measurements

-15 CYANA dives.
-10 independent tool-lift moorings.
-1 particle trap mooring.
-4 moorings with COB fish trap + drop-down camera.
-5 IOS amphipod trap moorings with intervention by CYANA.
-Cutter corer with injection device, core samples (incubation from 3 to 24 h).
-Tube corers, 27 cores.
-Recovery of 9 colonisation trays deployed in 1986.
-Sampling at the interface of flocculates and aggregates of organic matter.
-Fauna specimens taken with forceps and suction sampler for histological and biochemical study.

Location map

Positionning system

Geodetic system : VALEUR INDEFINIE

Bibliography

Publications

Sibuet Myriam, Floury Luc, Alayse-Danet Anne-Marie, Echardour Andre, Lemoign Tanguy, Perron Roger (1990). In situ experimentation at the water/sediment interface in the deep sea: 1. Submersible experimental instrumentation developed for sampling and incubation. Progress In Oceanography, 24(1-4), 161-167. https://doi.org/10.1016/0079-6611(90)90027-Y

Mahaut Marie-Laure, Geistdoerfer Patrick, Sibuet Myriam (1990). Trophic strategies in carnivorous fishes: their significance in energy transfer in the deep-sea benthic ecosystem (Meriadzek Terrace — Bay of Biscay). Progress In Oceanography, 24(1-4), 223-237. https://doi.org/10.1016/0079-6611(90)90032-W

Cahet Guy, Daumas Raoul, Sibuet Myriam (1990). In situ experimentation at the water/sediment interface in the deep sea: 2. Biotransformation of dissolved organic substrates by microbial communities at 2000m depth in the Bay of Biscay. Progress In Oceanography, 24(1-4), 169-178. https://doi.org/10.1016/0079-6611(90)90028-Z