SUBIO 11

Name: SUBIO 11
Start: 1997-09-24
End: 1997-10-05
Location: English Channel

Type	Oceanographic cruise
Ship	Gwen Drez
Ship owner	Ifremer
Dates	24/09/1997 - 05/10/1997
Chief scientist(s)	GODEFROY Dominique
	IFREMER STATION DE PORT EN BESSIN Avenue du General de Gaulle B.P. 32 14520 PORT EN BESSIN +33 (0)2 31 51 13 00 https://manchemerdunord.ifremer.fr/Implantations/Port-en-Bessin
DOI	10.17600/97050040
Objective	The biomarker concept is the tool used to detect the effects of exposure to pollutants. This programme is connected to the RNO national observation network and its objective is to assess the marine ecosystem's health status and predict long-term effects from pollutants. In the first years, pre-routine monitoring was set up on the Bay of Seine based on the first of the biological markers used, the detoxifying enzyme called EROD (ethoxyresorufine-O-deethylase), specific to HAP and PCB. Concurrently, studies were pursued on the AChe (Acétylcholinesterase) specific to pesticides (organophosphates and carbamates) and on the alteration of DNA, with supplementary tests to improve the diagnosis of biological effects. For 1997, we took account of the working group decisions taken in the light of the latest results presented. Continuation of a pilot study in the Bay of Seine which was selected by ICES as the reference area for French coasts. Variations in EROD activity measured in dragonets and dab sampled in exposed and less exposed zones showed the discriminating ability of this biomarker for exposure to pollutants. Difficulties with the dab samples and recognizing that dragonets are a sentinel species led us to pursue the study with only the latter species for the entire bay and only keeping dab for the three NSTF sampling points. Upon request from ICES, monitoring of biological effects at three stations in the Bay of Seine on Common dab (Limanda limanda) and on the dragonet (Callionymus lyra) as a substitute species. This monitoring of "Biological effects" is part of the R.N.O. framework. A number of studies were conducted in association with this study.

Sea/Ocean

English Channel

Ports

Port of departure : Cherbourg (France)

Port of return : Le Havre (France)

Scientific Authority

IFREMER STATION DE PORT EN BESSIN

Avenue du General de Gaulle

B.P. 32

14520 PORT EN BESSIN

+33 (0)2 31 51 13 00

https://manchemerdunord.ifremer.fr/Implantations/Port-en-Bessin

Participating bodie(s)

IFREMER/lab d'ecotoxicologie de Nantes, lab chimie des contaminants de Brest : Université du Havre/ lab d'ecotoxicologie

Discipline(s)

ENVIRONMENT
BIOLOGICAL OCEANOGRAPHY
CHEMICAL OCEANOGRAPHY

Code	Label	Quantity	PI
B14	Pelagic fish chalutages au chalut GOV : 39 traits;callionymes, limande, flet, bar	39 hauls	GODEFROY Dominique

Summary of measurements

- A multiple marker approach using two biomarkers for exposure, [EROD (or even PBH after development) and AChE] and a biomarker for effects (DNA adducts) is preferable.
- The 5 sampling zones previously selected were explored and the offshore zone was abandoned due to the sampling difficulties which run counter to the requirements of a monitoring strategy. The reference zone selected is located in the middle part of the Bay of Seine outside of the Seine plume. Sampling optimization was continued with the selection of adults of the same sex and and similar sizes.
- Chemical measurements must be taken in the tissues in order to interpret the biomarkers. The "Contaminant chemistry" laboratory of Ifremer in Brest and the University of Le Havre will determine which chemical measurements are appropriate.
- 10 dragonets representing the 5 zones and the maximum number possible of flounder (Platichthys flesus) were collected near the estuary for the selected chemical analyses. Samples of dragonets were taken for OPRI.

Location map