AGIR94

Name: AGIR94
Start: 1994-04-24
End: 1994-04-29
Location: Bay of Biscay

Type	Oceanographic cruise
Ship	Gwen Drez
Ship owner	Ifremer
Dates	24/04/1994 - 29/04/1994
Chief scientist(s)	KOUTSIKOPOULOS Constantin
	ÉCOLOGIE ET MODÈLES POUR L'HALIEUTIQUE Centre Ifremer de Nantes Rue de l'Ile d'Yeu BP 2105 44311 Nantes Cedex 3 +33 (0)2 40 37 41 67
DOI	10.17600/94050080
Objective	Analyzing growth conditions and the physiological condition of young phases in fish (larval stages) is an important step in understanding the mechanisms which provoke fluctuations in the abundance of exploited marine populations marines. In this context, it is essential to know about the biotic and abiotic factors which influence larval survival. This cruise is an attempt to combine hydrology, primary production, secondary production and abundance, and the status of anchovy larvae (Engraulis encrasicolus, L.) in the "Gironde" spawning grounds. It is a contribution to studies under the two national PNDR and PNOC programmes.

Sea/Ocean

Bay of Biscay

(Secteur du plateau a la sortie Gironde)

Ports

Port of departure : La Rochelle (France)

Port of return : La Rochelle (France)

Project

NATIONAL PROGRAMME OF COASTAL OCEANOGRAPHY

Scientific Authority

ÉCOLOGIE ET MODÈLES POUR L'HALIEUTIQUE

Centre Ifremer de Nantes

Rue de l'Ile d'Yeu

44311 Nantes Cedex 3

+33 (0)2 40 37 41 67

Participating bodie(s)

IFREMER Nantes, IFREMER Crema-l'Houmeau, CNRS

Discipline(s)

BIOLOGICAL OCEANOGRAPHY

Code	Label	Quantity	PI
B08	Phytoplankton 24 x 4	96	KOUTSIKOPOULOS Constantin
B09	Zooplankton 24 x 2	48	KOUTSIKOPOULOS Constantin
B13	Eggs & larvae	-	KOUTSIKOPOULOS Constantin
B72	Biochemical meas. (eg,lipids,amino Activite enzymatique (ATC) du zooplancton	24	KOUTSIKOPOULOS Constantin
H09	Water bottle stations 24 x 4	96 stations	KOUTSIKOPOULOS Constantin
H10	CTD stations	24 stations	KOUTSIKOPOULOS Constantin
H22	Phosphate 24 x 4	96 stations	KOUTSIKOPOULOS Constantin
H24	Nitrate 24 x 4	96 stations	KOUTSIKOPOULOS Constantin
H25	Nitrite 24 x 4	96 stations	KOUTSIKOPOULOS Constantin
H26	Silicate 24 x 4	96 stations	KOUTSIKOPOULOS Constantin

Summary of measurements

-CTD profiles.
-Water samples (5L bottles) to analyze phytoplankton and nutrients (4-5 levels per station).
-Mesozooplankton samples (WP2, 200 µm, bottom-surface).
-Ichthyoplankton (oblique hauls, 315 µm net, 1 m2 opening).
-Zooplankton taken in 100 µm net.

Location map

Data managed by SISMER

Bibliography

Publications

Puillat Ingrid , Lazure Pascal , Jegou Anne-Marie, Lampert Luis , Miller P (2004). Hydrographical variability on the French continental shelf in the Bay of Biscay, during the 1990s. Continental Shelf Research, 24(10), 1143-1163. Publisher's official version : https://doi.org/10.1016/j.csr.2004.02.008 , Open Access version : https://archimer.ifremer.fr/doc/00000/779/

References of Articles published in other Periodicals or Scientific Works acclaimed in the Field

Bergeron Jean-Pierre, Herbland Alain (2001). Pyruvate kinase activity as index of carbohydrate assimilation by mesozooplankton: an early field implementation in the Bay of Biscay, NE Atlantic. Journal of plankton research, 23(2), 157-163. Open Access version : https://archimer.ifremer.fr/doc/00000/452/