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SCANS II cetacean sightings on primary platform of vessel surveys 2005
Citation
Hammond, P.S., Macleod, K., Berggren, P., Borchers, D.L., Burt, L., Cañadas, A., Desportes, G., Donovan, G.P., Gilles, A., Gillespie, D., et al. 2013. Cetacean abundance and distribution in European Atlantic shelf waters to inform conservation and management. Biological Conservation. 164, 107–122
Contact: Lacey, Claire

Access data
Archived data
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Description
The European Union (EU) Habitats Directive requires Member States to monitor and maintain at favourable conservation status those species identified to be in need of protection, including all cetaceans. In July 2005 we surveyed the entire EU Atlantic continental shelf to generate robust estimates of abundance for harbour porpoise and other cetacean species. The survey used line transect sampling methods and purpose built data collection equipment designed to minimise bias in estimates of abundance. more

Shipboard transects covered 19,725 km in sea conditions <= Beaufort 4 in an area of 1,005,743 km2. Aerial transects covered 15,802 km in good/moderate conditions (<= Beaufort 3) in an area of 364,371 km2. Thirteen cetacean species were recorded; abundance was estimated for harbour porpoise (375,358; CV = 0.197), bottlenose dolphin (16,485; CV = 0.422), white-beaked dolphin (16,536; CV = 0.303), short-beaked common dolphin (56,221; CV = 0.234) and minke whale (18,958; CV = 0.347). Abundance in 2005 was similar to that estimated in July 1994 for harbour porpoise, white-beaked dolphin and minke whale in a comparable area. However, model-based density surfaces showed a marked difference in harbour porpoise distribution between 1994 and 2005. Our results allow EU Member States to discharge their responsibilities under the Habitats Directive and inform other international organisations concerning the assessment of conservation status of cetaceans and the impact of bycatch at a large spatial scale. The lack of evidence for a change in harbour porpoise abundance in EU waters as a whole does not exclude the possibility of an impact of bycatch in some areas. Monitoring bycatch and estimation of abundance continue to be essential.

Scope
Themes:
Biology > Mammals
Keywords:
Marine, ANE, Europe, European Continental Shelf, Cetacea

Geographical coverage
ANE, Europe, European Continental Shelf [Marine Regions]

Temporal coverage
29 June 2005 - 28 July 2005

Taxonomic coverage
Cetacea [WoRMS]

Parameters
Animal sightings, Occurrence of biota

Contributors
University of St Andrews; Sea Mammal Research Unit (SMRU), moredata creator

Related datasets
Published in:
OBIS-SEAMAP: Spatial Ecological Analysis of Megavertebrate Populations, more
Other relation:
SCANS II cetacean sightings on tracker platform of vessel surveys 2005, more

Publication
Based on this dataset:
Hammond, P.S. et al. (2013). Cetacean abundance and distribution in European Atlantic shelf waters to inform conservation and management. Biol. Conserv. 164: 107-122. dx.doi.org/10.1016/j.biocon.2013.04.010, more

Dataset status: Completed
Data type: Data
Data origin: Research: field survey
Metadatarecord created: 2015-03-23
Information last updated: 2015-03-23
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