Alborán Corridor IMMA

Area Size

20 217 km2

Qualifying Species and Criteria

Sperm whale – Physeter macrocephalus

Criterion A; C (iii)

Fin whale – Balaenoptera physalus

Criterion A; C (iii)

Marine Mammal Diversity 

Orcinus orca, Stenella coeruleoalba, Delphinus delphis, Tursiops truncatus, Globicephala melas

Summary

This area represents a migratory corridor for Vulnerable fin whales (Balaenoptera physalus) in the northern Alborán Sea and Strait of Gibraltar. Fin whales migrating from the inner Mediterranean Sea towards the Atlantic Ocean and vice versa use this corridor bidirectionally, as shown by regular sightings and satellite tagging. This area also encompasses a large portion of the migration routes used by the Endangered Mediterranean subpopulation of sperm whales (Physeter macrocephalus) between the Western Mediterranean and their Ligurian Sea feeding grounds.

Description of Qualifying Criteria

Criterion A – Species or Population Vulnerability

The fin whale Mediterranean subpopulation is listed as Vulnerable in the IUCN Red List of Threatened Species. After several decades of research, it is still unclear which subpopulation or which portion of the subpopulations inhabiting the Mediterranean Sea might use this migration corridor on their way from/to the Atlantic Ocean. However, a large portion of migrating fin whales use the Alborán Corridor regularly.

The sperm whale Mediterranean subpopulation is listed as Endangered in the IUCN Red List of Threatened Species. This area encompasses a large portion of the migration routes used by sperm whales between the Strait of Gibraltar and Ligurian Sea feeding grounds.

Criterion C: Key Life Cycle Activities

Sub-criterion Ciii: Migration Routes

Fin whales use this area as a bi-directional migration corridor, in summer mainly swimming South-west and in winter mainly North-east. This was shown by long-term recorded observations in the Alborán Sea and the Strait of Gibraltar as well as satellite tagging. Five individuals were tagged in summer and winter in the Strait of Gibraltar with Spot5 satellite tags. The three tagged animals have been observed to have passed through the Alborán Corridor.

This area encompasses a large portion of the migration routes used by Mediterranean sperm whales between the Strait of Gibraltar and Ligurian Sea feeding grounds, as can be seen on Figure 2 and by satellite tracking of 2 individuals from the Strait of Gibraltar to the NW Mediterranean Sea.

Supporting Information

Bentaleb, C., Martin, M., Vrac, M., et al. 2011. Foraging ecology of Mediterranean fin whales in a changing environment elucidated by satellite tracking and baleen plate stable isotopes. MEPS: 438:285-302.

de Stephanis, R. et al. 2008.Summer spatial distribution of cetaceans in the Strait of Gibraltar in relation to the oceanographic context. Marine Ecology Progress Series,353, 275-288.

de Stephanis, R., et al. 2012. Critical Habitat for Sperm Whales in The South-West Mediterranean Sea. 26th Ann. Meeting European Cetacean Society, Galway, Ireland, 26-28 March 2012.

Gauffier, P. et al. 2012. Winter presence of large cetaceans in the Strait of Gibraltar. 26th Ann. Meeting European Cetacean Society, Galway, Ireland, 26-28 March 2012.

Gauffier, P. et al. 2009. An update on fin whales (Balaenoptera physalus) migration through intense maritime traffic in the Strait of Gibraltar. International Whaling Commission document SC/61/BC6, Madeira, Portugal. 4 pp. Available at http://iwcoffice.org/.

Notarbartolo di Sciara, et al. 2016. Fin Whales, Balaenoptera physalus: At Home in a Changing Mediterranean Sea? Advances in Marine Biology, 75: 75-101.

Downloads

Download the full account of the Alborán Corridor IMMA using the Fact Sheet button below:

To make a request to download the GIS Layer (shapefile) for the Alborán Corridor IMMA please complete the following Contact Form:

* Required fields



(*)