Observatoire Pelagis boat surveys 2003-2021

Latest version published by OBIS-SEAMAP on 20 October 2022 OBIS-SEAMAP
Publication date:
20 October 2022
Published by:
CC-BY-NC 4.0

Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 89,382 records in English (5 MB) - Update frequency: not planned
Metadata as an EML file download in English (87 KB)
Metadata as an RTF file download in English (31 KB)


Original provider: Observatoire PELAGIS UAR 3462 University La Rochelle - CNRS Dataset credits: Observatoire PELAGIS UAR 3462, University La Rochelle - CNRS Abstract: Since 2003, the Observatoire PELAGIS (La Rochelle University) participated to annual halieutic surveys, led by the IFREMER, to collect data on the distribution of marine top predators in order to estimate their relative abundance and preferred habitats in the Bay of Biscay, the Channel and the North Sea. Each year, three observers take place on board the vessel “Thalassa” to record sightings of seabirds, marine mammals, large fish and fishing boats, from dawn to dusk. Following distance sampling methods, visual censuses are made by two observers (while the third observer is resting) from the upper platform of the boat (min. 14m above the sea level). They are placed on each side of the deck, looking ahead for marine predator with an angle of 180°. For each sighting, the species and the number of individuals are recorded, as well as the behaviour, distance and angle (upon request). Purpose: One of the main advantages of this survey lays in its ecosystemic approach, which provides information on all the components of the food web (from planktonic organisms to predators) as well as data on the environmental parameters (sea surface temperature, salinity…). Interactions between prey and predators are complex in marine ecosystems, which are submitted to strong spatio-temporal variations. Thanks to ecosystem-based surveys, observed distributions and densities of marine predators can be related to the occurrence of their prey, providing to scientists and managers a better understanding of the marine ecosystems structure. Supplemental information: [2022-10-20] The records on 2016-09-21 got the longitude sign swapped. they are corrected. [2022-01-18] Data in 2020 and 2021 were appended. [2018-04-26] Data in 2016 and 2017 were appended. Time and group size of the sightings are not available online. They may be released upon request.

Data Records

The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 89,382 records.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.


The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Doremus, G. 2022. Observatoire Pelagis boat surveys 2003-2021. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/1403) on yyyy-mm-dd.


Researchers should respect the following rights statement:

The publisher and rights holder of this work is OBIS-SEAMAP. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: d135ba77-9d68-466b-bff9-8d1a0c53b7d7.  OBIS-SEAMAP publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Ocean Biodiversity Information System.


Occurrence,Marine Animal Survey,Marine Biology,Seabirds,Marine mammals,Cetaceans,Sea turtles,Elasmobranchii,Visual Sighting,Vessel; Observation; Occurrence

External data

The resource data is also available in other formats

OBIS-SEAMAP Dataset Page https://seamap.env.duke.edu/dataset/1403 UTF-8 Interactive map
FGDC Metadata https://seamap.env.duke.edu/dataset/1403/xml UTF-8 XML


Ghislain Doremus
  • Owner
  • Originator
  • Point Of Contact
Primary contact
Observatoire Pelagis UMS 3462, University La Rochelle - CNRS
Hélène Peltier
  • Originator
Secondary contact
Observatoire PELAGIS, UMS 3462, University La Rochelle-CNRS
  • Metadata Provider
  • Distributor
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
27708 Durham

Geographic Coverage

France,Northeast Atlantic

Bounding Coordinates South West [-25.613, -11.293], North East [55.28, 47.358]

Taxonomic Coverage

Scientific names are based on the Integrated Taxonomic Information System (ITIS).

Phylum Cnidaria, Cnidaria, Ctenophora (comb jellies)
Superclass Osteichthyes (bony fishes), Osteichthyes (bony fishes), Osteichthyes (bony fishes), Osteichthyes (bony fishes), Osteichthyes (bony fishes)
Class Aves (Birds), Aves (Birds), Aves (Birds), Mammalia (mammals)
Subclass Elasmobranchii (cartilaginous fishes), Elasmobranchii (cartilaginous fishes), Elasmobranchii (cartilaginous fishes)
Superorder Euselachii, Euselachii
Order Cetacea (cetaceans), Chiroptera (bats), Chiroptera (bats), Falconiformes (Falcons), Cetacea (cetaceans), Cetacea (cetaceans), Charadriiformes, Cetacea (cetaceans), Cetacea (cetaceans), Cetacea (cetaceans), Passeriformes (Perching Birds), Passeriformes (Perching Birds), Cetacea (cetaceans), Cetacea (cetaceans), Cetacea (cetaceans)
Suborder Xiphioidei, Xiphioidei
Family Alcidae, Alcidae, Alcidae, Anatidae (Ducks), Balaenopteridae (rorquals), Balaenopteridae (rorquals), Procellariidae (Fulmars / Petrels / Shearwaters), Procellariidae (Fulmars / Petrels / Shearwaters), Cheloniidae (Sea Turtles), Cheloniidae (Sea Turtles), Delphinidae (dolphins), Hydrobatidae, Hydrobatidae, Delphinidae (dolphins), Laridae (Gulls), Laridae (Gulls), Laridae (Gulls), Scolopacidae, Phocidae (earless seals), Phocidae (earless seals), Procellariidae (Fulmars / Petrels / Shearwaters), Delphinidae (dolphins), Laridae (Gulls), Delphinidae (dolphins), Delphinidae (dolphins), Laridae (Gulls), Hyperoodontidae
Subfamily Anatinae, Scombrinae, Scombrinae, Scombrinae
Genus Alauda, Anser (Bean Geese), Anthus, Anthus, Apus, Apus, Calidris, Calidris, Charadrius, Charadrius, Chlidonias, Columba, Dasyatis (stingrays), Delphinus (common dolphins), Egretta (Plumed Egrets), Egretta (Plumed Egrets), Exocoetus (flyingfishes), Exocoetus (flyingfishes), Falco, Falco, Gavia (Loons), Gavia (Loons), Hirundo, Hirundo, Larus, Larus, Larus, Larus, Melanitta (Scoters), Mesoplodon (beaked whales), Motacilla, Motacilla, Numenius, Phaethon, Phaethon, Phalacrocorax, Phalacrocorax, Pluvialis, Puffinus, Puffinus, Puffinus, Stercorarius, Stercorarius, Sterna, Sterna, Streptopelia, Tringa, Turdus, Turdus
Species Accipiter nisus (Eurasian Sparrowhawk), Acrocephalus scirpaceus (Eurasian Reed Warbler), Aegithalos caudatus (Long-tailed Bushtit), Alauda arvensis (Eurasian Skylark), Alca torda (Razorbill), Alca torda (Razorbill), Alcedo atthis (Common Kingfisher), Alle alle (Dovekie), Alopias vulpinus, Anas acuta (Northern Pintail), Anas clypeata (Northern Shoveler), Anas crecca (Eurasian Teal), Anas penelope (Eurasian Wigeon), Anas platyrhynchos (Mallard), Anas strepera (Gadwall), Anser albifrons (Greater White-fronted Goose), Anser anser (Greylag Goose), Anthus petrosus (Eurasian Rock Pipit), Anthus pratensis (Meadow Pipit), Apus apus (Common Swift), Ardea cinerea (Gray Heron), Puffinus gravis (Great Shearwater), Puffinus griseus (Sooty Shearwater), Arenaria interpres (Ruddy Turnstone), Asio flammeus (Short-eared Owl), Asio otus (Long-eared Owl), Aythya fuligula (Tufted Duck), Balaenoptera acutorostrata (Common Minke Whale), Balaenoptera physalus (Fin Whale), Branta bernicla (Brant), Bubulcus ibis (Cattle Egret), Buteo buteo (Common Buzzard), Calidris alba (Sanderling), Calidris alpina (Dunlin), Calidris canutus (Red Knot), Calidris maritima (Purple Sandpiper), Calonectris diomedea (Cory's Shearwater), Carduelis cannabina (Common Linnet), Carduelis carduelis (Eurasian Goldfinch), Carduelis spinus (Eurasian Siskin), Caretta caretta (Loggerhead Sea Turtle), Ardea alba (Great Egret), Stercorarius skua (Great Skua), Cepphus grylle (Black Guillemot), Cetorhinus maximus (basking shark), Charadrius alexandrinus (Snowy Plover), Charadrius hiaticula (Common Ringed Plover), Chlidonias hybrida (Whiskered Tern), Chlidonias niger (Black Tern), Chroicocephalus ridibundus (Common Black-headed Gull), Circus aeruginosus (Western Marsh Harrier), Circus cyaneus (Northern Harrier), Columba livia (Common Pigeon), Columba oenas (Stock Dove), Columba palumbus (Common Wood Pigeon), Columba palumbus (Common Wood Pigeon), Corvus corone (Carrion Crow), Delichon urbicum, Delichon urbicum, Delphinus delphis (Short-beaked Common Dolphin), Dermochelys coriacea (Leatherback Sea Turtle), Egretta garzetta (Little Egret), Emberiza schoeniclus (Common Reed Bunting), Erithacus rubecula (European Robin), Falco columbarius (Merlin), Falco peregrinus (Peregrine Falcon), Falco subbuteo (Northern Hobby), Falco tinnunculus (Common Kestrel), Fratercula arctica (Atlantic Puffin), Fringilla coelebs (Common Chaffinch), Fringilla montifringilla (Brambling), Fulica atra (Eurasian Coot), Fulmarus glacialis (Northern Fulmar), Gallinago gallinago (Common Snipe), Gavia arctica (Arctic Loon), Gavia immer (Common Loon), Gavia stellata (Red-throated Loon), Globicephala melas (Long-finned Pilot Whale), Grampus griseus (Risso's Dolphin), Halichoerus grypus (Atlantic gray seal), Hirundo rustica (Barn Swallow), Oceanodroma leucorhoa (Leach's Storm Petrel), Hydrobates pelagicus (European Storm Petrel), Hydrocoloeus minutus (Little Gull), Ichthyaetus melanocephalus (Mediterranean Gull), Lamna nasus (porbeagle), Lanius collurio (Red-backed Shrike), Larus argentatus (Herring Gull), Larus cachinnans (Yellow-legged Gull), Larus canus (Mew Gull), Larus fuscus (Lesser Black-backed Gull), Larus hyperboreus (Glaucous Gull), Larus marinus (Great Black-backed Gull), Ichthyaetus melanocephalus (Mediterranean Gull), Larus michahellis (Yellow-legged Gull), Hydrocoloeus minutus (Little Gull), Chroicocephalus ridibundus (Common Black-headed Gull), Xema sabini (Sabine's Gull), Limosa lapponica (Bar-tailed Godwit), Linaria cannabina (Common Linnet), Anas penelope (Eurasian Wigeon), Megaptera novaeangliae (Humpback Whale), Melanitta nigra (Black Scoter), Mesoplodon densirostris (Blainville's Beaked Whale), Milvus migrans (Black Kite), Mobula mobular (giant devil ray), Mola mola (ocean sunfish), Morus bassanus (Northern Gannet), Morus bassanus (Northern Gannet), Motacilla alba (White Wagtail), Motacilla cinerea (Gray Wagtail), Motacilla flava (Western Yellow Wagtail), Muscicapa striata (Spotted Flycatcher), Numenius arquata (Eurasian Curlew), Numenius phaeopus (Whimbrel), Oceanites oceanicus (Wilson's Storm Petrel), Oceanodroma leucorhoa (Leach's Storm Petrel), Oenanthe oenanthe (Northern Wheatear), Orcinus orca (Killer Whale), Oriolus oriolus (Eurasian Golden Oriole), Otus scops (Eurasian Scops Owl), Parus major (Great Tit), Passer domesticus (House Sparrow), Peponocephala electra (Melon-headed Whale), Phalacrocorax aristotelis, Phalacrocorax carbo (Great Cormorant), Phalaropus fulicarius (Red Phalarope), Phoca vitulina (Harbor Seal), Phocoena phocoena (Harbor Porpoise), Phoenicurus ochruros (Black Redstart), Phoenicurus phoenicurus (Common Redstart), Phylloscopus collybita (Common Chiffchaff), Phylloscopus trochilus (Willow Warbler), Physeter macrocephalus (Sperm Whale), Platalea leucorodia (Eurasian Spoonbill), Pluvialis apricaria (European Golden Plover), Pluvialis squatarola (Black-bellied Plover), Podiceps cristatus (Great Crested Grebe), Podiceps grisegena (Red-necked Grebe), Prionace glauca (blue shark), Puffinus gravis (Great Shearwater), Puffinus griseus (Sooty Shearwater), Puffinus mauretanicus (Balearic Shearwater), Puffinus puffinus (Manx Shearwater), Puffinus yelkouan (Yelkouan Shearwater), Regulus ignicapilla, Regulus regulus (Goldcrest), Riparia riparia (Bank Swallow), Rissa tridactyla (Black-legged Kittiwake), Somateria mollissima (Common Eider), Anas clypeata (Northern Shoveler), Spinus pinus (Pine Siskin), Stenella coeruleoalba (Striped Dolphin), Stenella longirostris (Spinner Dolphin), Stercorarius longicaudus (Long-tailed Jaeger), Stercorarius parasiticus (Parasitic Jaeger), Stercorarius pomarinus (Pomarine Jaeger), Stercorarius skua (Great Skua), Sternula albifrons (Little Tern), Onychoprion anaethetus (Bridled Tern), Sterna dougallii (Roseate Tern), Sterna hirundo (Common Tern), Gelochelidon nilotica (Gull-billed Tern), Sterna paradisaea (Arctic Tern), Thalasseus sandvicensis (Sandwich Tern), Streptopelia decaocto (Eurasian Collared Dove), Streptopelia turtur (European Turtle Dove), Sturnus vulgaris (Common Starling), Morus bassanus (Northern Gannet), Sylvia atricapilla (Eurasian Blackcap), Sylvia borin (Garden Warbler), Sylvia communis (Common Whitethroat), Tadorna tadorna (Common Shelduck), Thalassarche melanophris (Black-browed Albatross), Thalasseus sandvicensis (Sandwich Tern), Thunnus alalunga, Thunnus alalunga, Thunnus thynnus (Atlantic bluefin tuna), Tringa totanus (Common Redshank), Troglodytes troglodytes (Winter Wren), Turdus iliacus (Redwing), Turdus merula (Common Blackbird), Turdus philomelos (Song Thrush), Turdus pilaris (Fieldfare), Turdus viscivorus (Mistle Thrush), Tursiops truncatus (Common Bottlenose Dolphin), Upupa epops (Hoopoe), Uria aalge (Common Murre), Vanellus vanellus (Northern Lapwing), Xema sabini (Sabine's Gull), Ziphius cavirostris (Cuvier's Beaked Whale)

Temporal Coverage

Start Date / End Date 2003-05-29 / 2021-12-05

Project Data

No Description available

Title Observatoire Pelagis boat surveys 2003-2021
Funding NA

The personnel involved in the project:

Ghislain Doremus
  • Owner
Hélène Peltier
  • Originator

Sampling Methods


Study Extent NA

Method step description:

  1. NA

Collection Data

Collection Name zd_1403
Collection Identifier zd_1403
Parent Collection Identifier OBIS-SEAMAP

Additional Metadata

marine, harvested by iOBIS

Purpose One of the main advantages of this survey lays in its ecosystemic approach, which provides information on all the components of the food web (from planktonic organisms to predators) as well as data on the environmental parameters (sea surface temperature, salinity…). Interactions between prey and predators are complex in marine ecosystems, which are submitted to strong spatio-temporal variations. Thanks to ecosystem-based surveys, observed distributions and densities of marine predators can be related to the occurrence of their prey, providing to scientists and managers a better understanding of the marine ecosystems structure.
Alternative Identifiers d135ba77-9d68-466b-bff9-8d1a0c53b7d7