Dynamique des pêcheries traditionnelles d'anchois, de calmars et de poulpes du Sud-Ouest de Madagascar : utilisation d'outils océanographiques pour la gestion des ressources
Year: 2009
Type: dissertation
Abstract: Anchovy (Stolephorus indicus), squid (Loligo sp.) and octopus (Octopus cyanea) are among the main exploited halieutic resources in the south western region of Madagascar. Important year to year changes of their abundance (e.g. anchovy) could have drastic consequences on catches as well as for the economy of the local communities. Yearly environmental changes analysis on enrichment process in upwelling area (Chl-a), sea surface temperature, winds permitted to explain annual and seasonal variability of anchovy, squid and octopus abundance index as well as their seasonal reproduction strategy. Seasonally environmental cycle is taken in account by species for their reproduction strategy development. Results from this study show the first idea of factors and relations of the traditional fishery dynamic of anchovy, squid and octopus. These factors and their relations should be considered while managing these fisheries. Combined effects of climatic factors were addressed by means of multivariate approach and the use of the simple production surplus method (CLIMPROD) which can be improved and used as tools for fishery management combining resources and environment.
Author: Bemiasa, John
Language: English
Subfield: Aquatic Science
Domain: Life Sciences
SDG: Life below water
Open Access status: green
OpenAlex ID: W207677536