Évaluation, par télédétection satellitaire, des stocks de Macrocystis pyrifera dans le golfe du Morbihan (archipel de Kerguelen)

Autre(s) titre(s) Use of satellite imagery in management of giant-kelp resources, morbihan gulf, kerguelen archipelago
Type Article
Date 1992
Langue(s) Français
Auteur(s) Belsher T, Mouchot Mc
Affiliation(s) CTR CANADIEN TELEDETECT, DIV APPLICAT, OTTAWA K1A 0Y7, ONTARIO, CANADA
Source Oceanologica Acta (0399-1784) (Gauthier-Villars), 1992 , Vol. 15 , N. 3 , P. 297-307
WOS© Times Cited 13
Résumé en anglais Macrocystis pyrifera, algae which grow to about 60 m in length, are widely present in the Kerguelen Islands. A satellite program has been initiated to map these species quantitatively and qualitatively as well as to establish a possible correlation between their occurrence and sea- surface temperature. Data from SPOT-1 and NOAA-11 AVHRR were acquired during the 1988 austral summer around the area of "l'ile Noire". SPOT-1 data processing has permitted estimation of the biomass (wet weight) of Macrocystis pyrifera at 1 106 kt, spread over an area of 186.30 km2 in the Morbihan Gulf. Supervised classification shows that 30 % of the vegetal coverage carries 60 % of the total biomass. These clusters of seaweed represent a potential of 13 220 tons of industrial-quality alginates. NOAA-11 data have permitted the location of SPOT-1 imagery on the Kerguelen archipelago. The different thematic maps obtained by processing the remotely-sensed data have permitted assessment of previously acquired biological and physical data. The validation of the remotely-sensed data was carried out through a ground-truthing mission at the time of acquisition.
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Belsher T, Mouchot Mc (1992). Évaluation, par télédétection satellitaire, des stocks de Macrocystis pyrifera dans le golfe du Morbihan (archipel de Kerguelen). Oceanologica Acta, 15(3), 297-307. Open Access version : https://archimer.ifremer.fr/doc/00100/21163/