Données de suivi bi-annuel de 20 récifs à Sabellaria alveolata (12 en France + 8 au Royaume-Uni et au Portugal) effectué entre 2016 et 2023 selon le protocole standardisé développé dans le cadre du projet REEHAB (pour REEf HABitat – www.hermelles.fr; Dubois et al., 2020).

The associated data highlights the sampling programme for the data acquisition campaign of Observation on the Aerial Platform for the SAMM1campaign (Aerial Marine Megafauna Monitoring) conducted by the PELAGIS observatory.

The associated data highlights the spatial influence of the dataset of the type “Visual Observations from an Aerial Platform” from the PELAGIS Observatory. These ranges represent the different areas of study on which the PELAGIS observatory conducted campaigns of visual observations from aerial platforms. Each area of study is associated with at least one campaign, with observers and geographical sectors linked to that campaign. Each sector is associated with bathymetric strips and transects related to each of the strips, with a few exceptions for the Indian Ocean region. Description of fields and values of the attribute tables : (- field name, meaning : value, description of values) - region, area of study specific to the PELAGIS observatory PELAGIS : OI/FRM/ AGFR/SOP/SP, region_lbl - programme, associated programme of which the campaign is a part: REMMOA/PACOMM, REcensement de la Mégafaune Marine par Observation Aérienne/Programme d'Acquisition sur les Oiseaux et Mammifères Marins - idCampagne, abbreviated name of the data collection campaign: OI/SAMM/ ANT/SOP/PF/GUY, Campagne Océan Indien/Suivi Aérien de la Mégafaune Marine/Sud Ouest Pacifique/Polynésie Française/ Guyane française - progress, current state of the campaigns, from collection to scientific optimisation : Preparation/Acquisition/ Analysis/Enhancement, campaign being prepared/under acquisition/being analysed/data enhanced within the context of a scientific publication.

The associated data highlights the sampling programme for the data acquisition campaign of Observation on the Aerial Platform for the SAMM1and SAMM2 campaigns (Aerial Marine Megafauna Monitoring) conducted by the PELAGIS observatory (UMS 3462 ULR/CNRS). The sampling plan is composed of preestablished sampling strata and transects. These were drawn up according to the specific characteristic of the study area “Mainland France”, or FrM. Description of fields and values of allocation tables: : ( - field name, meaning: value, description of values) region char 5 Study area region_lbl char 50 labelled study area idCampagne (survey) char 15 Name of the campaign programme char 20 Programme name sector char 10 Sampling sector short ID strate char 5 Sampling strata short ID strate_lbl char 15 Labelled sampling strata areaKM double Strata surface area transect_name char 10 transect sampling length_km double Transect length start_x double Coordinates of the start of transect x in decimal degree start_y double Coordinates of the start of transect y in decimal degree end_x double Coordinates of the end of transect x in decimal degree end_y double Coordinates of the end of transect y in decimal degree

Occurrence rate by observation number for 100km of effort in each 40km mesh in the French mainland EZE in the winter of 2011/2012 and the summer of 2012. Description of the attribute table: survey : campaign Type: observation type Mesh: mesh size in kilometers _no_maille : mesh number The following fields correspond to the calculation of the occurrence rate for the observation number for 1000km of effort for each species or group of species : - [marsouin] common porpoise - [grdDauph] bottlenose dolphin - [lagenor] White-beaked dolphin - [pttDelph] : common dolphin and Striped dolphin - [globiceph] : Long-finned pilot whale + Risso's dolphin - [cakobab] : Sperm whale+ kogias + Beaked whales - [balenopt] : Fin whale + Minke whale + blue whale - [phoque] seal (grey + harbour)

The associated data highlights the sampling programme for the data acquisition campaign of Observation on the Aerial Platform for the SAMM1campaign (Aerial Marine Megafauna Monitoring) conducted by the PELAGIS observatory.