title: Surveying shrimp aquaculture pond activity using multitemporal VHSR satellite images - case study from the Perancak estuary, Bali, Indonesia.
abstract: From the 1980's, Indonesian shrimp production has continuously increased through a large expansion of cultured areas and an intensification of the production. As consequences of diseases and environmental degradations linked to this development, there are currently 250,000ha of abandoned ponds in Indonesia. To implement effective procedure to undertake appropriate aquaculture ecosystem assessment and monitoring, an integrated indicator based on four criteria using very high spatial optical satellite images, has been developed to discriminate active from abandoned ponds. These criteria were: presence of water, aerator, feeding bridge and vegetation. This indicator has then been applied to the Perancak estuary, a production area in decline, to highlight the abandonment dynamic between 2001 and 2015. Two risk factors that could contribute to explain dynamics of abandonment were identified: climate conditions and pond locations within the estuary, suggesting that a spatial approach should be integrated in planning processes to operationalize pond rehabilitation.
authors.affiliation: PPME, University of New Caledonia, BP R4, 98851 Nouméa, Cedex, New Caledonia; Agency of Research and Development for Marine and Fisheries, Ministry of Marine Affairs and Fisheries, Jakarta, Indonesia. Electronic address: niken.gusmawati@kkp.go.idm.
authors.forename: Niken
authors.initials: N
authors.lastname: Gusmawati
authors.affiliation: IFREMER LEAD-NC, BP 2059, 98846 Nouméa, Cedex, New Caledonia. Electronic address: benoit.soulard@ifremer.fr.
authors.forename: Benoît
authors.initials: B
authors.lastname: Soulard
authors.affiliation: PPME, University of New Caledonia, BP R4, 98851 Nouméa, Cedex, New Caledonia. Electronic address: nazha.selmaoui@univ-nc.nc.
authors.forename: Nazha
authors.initials: N
authors.lastname: Selmaoui-Folcher
authors.affiliation: IRD/UMR AMAP, botAnique et bioinforMatique de l'Architecture des Plantes, TAA51/PS2, Boulevard de la Lironde, Montpellier, Cedex 5, France; Laboratory of Geomatics and Applied Informatics (LIAG), French Institute of Pondicherry (IFP), UMIFRE 21 CNRS-MAEE/USR 3330, Pondicherry, India. Electronic address: christophe.proisy@ird.fr.
authors.forename: Christophe
authors.initials: C
authors.lastname: Proisy
authors.affiliation: Agency of Research and Development for Marine and Fisheries, Ministry of Marine Affairs and Fisheries, Jakarta, Indonesia. Electronic address: akhmadmustafa@yahoo.com.
authors.forename: Akhmad
authors.initials: A
authors.lastname: Mustafa
authors.affiliation: IFREMER LEAD-NC, BP 2059, 98846 Nouméa, Cedex, New Caledonia. Electronic address: romain.le.gendre@ifremer.fr.
authors.forename: Romain
authors.initials: R
authors.lastname: Le Gendre
authors.affiliation: IFREMER LEAD-NC, BP 2059, 98846 Nouméa, Cedex, New Caledonia. Electronic address: thierry.laugier@ifremer.fr.
authors.forename: Thierry
authors.initials: T
authors.lastname: Laugier
authors.affiliation: IFREMER LEAD-NC, BP 2059, 98846 Nouméa, Cedex, New Caledonia. Electronic address: hugues.lemonnier@ifremer.fr.
authors.forename: Hugues
authors.initials: H
authors.lastname: Lemonnier
mesh_terms: D000818:Animals; D017756:Aquaculture / Q000379:methods*; D002980:Climate; D033364:Decapoda; D017753:Ecosystem; D063366:Estuaries; D007214:Indonesia; D061005:Ponds
keywords: Abandoned ponds; Aquaculture; Indicator; Spatial and temporal survey; Supervised classification; VHSR images