Occurence

Distribution

Abondance relative

Presence at sea Distribution at sea

Combining Observation and observation effort :

To define the abundance and distribution of Marine Mammals

Geostatistical modelling

Modelling of preferred habitats

Natura 2000 en mer

Marine Strategy Framework Directive

Obligation de citation "Réseau National Echouages, Observatoire PELAGIS, UMS 3462 ULR/CNRS, AAMP,Occurence des donnéesd'échouages de mammifères marins'"

Obligation de prise de contact pour tout usage, toute publication scientifique et/ou "coauthorship" si jugé nécessaire par les propriétaires

Mandatory citation "Observatoire PELAGIS, UMS 3462 ULR/

CNRS, AAMP, CEBC, 'database name'"

Users must make contact with the data providers prior to all use, scientific publication and/or "coauthorship" if considered necessary by the owners of the data.

At least one campaign is attributed to each region of study.

Observers are attributed a campaign and a geographical area. For each sector there are bathymetric strata and transects which are linked to each of these strata (with a few exceptions for the Indian Ocean).

- Definition of sectors: zones corresponding to distinct maritime areas (seaboard, coast, archipelago, etc.)

- Definition of bathymetric strata : areas at the heart of each sector, determined according to bathymetric characteristics such as depth, relief and slope gradient.

- Definition of transects : breakdown of the observation effort between the bathymetric strata was defined according to expected observation rate (available in the literature or from previous unpublished campaigns) in order to obtain a significant number of observations for cetaceans and to make it possible to modify the effort during the campaign according to the real observation rate (increase or decrease of effort. The transects are distributed systematically within the strata.

Data was acquired during the flights and is also recorded digitally.

Back on land, the data is checked and errors removed. Corresponding codes for species, name, family and genus were verified using the TAXREFv5.0 reference. If need be, species identification is refined using photos taken during the flyovers. Data remains in the initial system of coordinates. Data is acquired within the context of a protocol defined as of acquisition (observers trained) for technical and scientific validation overseen by the PELAGIS observatory.