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NRLD - 329846 | Stenella attenuata

Assessment ID
329846
Taxon name
Stenella attenuata
(Gray, 1846)
Uploaded by
National Red List Database
Taxonomic information
Scientific name
Stenella attenuata
(Gray, 1846)
Assessed taxon level
Species
Higher level taxonomic groupings
Vertebrates
Mammals
Kingdom
Animalia
Phylum
chordata
Class
mammalia
Order
cetartiodactyla
Family
delphinidae
Genus
Stenella
Species
attenuata
Species authority
(Gray, 1846)
Taxonomic notes and synonyms listed
The genus Stenella is paraphyletic, and it is likely that the Delphininae will be restructured in the coming years (LeDuc et al. 1999, Perrin et al. 2013). Two subspecies are recognized: S. attenuata attenuata in oceanic tropical waters worldwide, and S. a. graffmani in the coastal waters of the eastern tropical Pacific (ETP) (Jefferson et al. 2015, Perrin 2018).
Location and scope
Specific locality or subnational name or regional name
United Arab Emirates (the)
Scope (of the Assessment)
National
Countries included within the scope of the assessment
United Arab Emirates (the)
Country ISO code(s)
ARE
Does the assessment cover a marine EEZ area(s)?
Not_assigned
Conservation Status
Assessed as
Data deficient
Abbreviated status
DD
Criteria system used
IUCN

(see Assessment details)

Assessment rationale/justification
This species is known only from a few recent sightings off the coast of Fujairah and an old skull record from the Gulf. No further information is available on population size or trends, and there are also no data on any threats to the species, hence it is assessed as Data Deficient. No regional adjustment is made to the Data Deficient assessment.
Assessment details
Year assessed
2018
Assessors/contributors/reviewers listed
UAE National Red List Workshop
Criteria system used
IUCN
Reference for methods given
IUCN. 2012. IUCN Red List Categories and Criteria: Version 3.1, Second edition. IUCN, Gland, Switzerland and Cambridge, UK. iv + 32pp pp. And IUCN. 2012. Guidelines for Application of IUCN Red List Criteria at Regional and National Levels: Version 4.0. Gland, Switzerland and Cambridge, UK: IUCN. iii + 41pp.
Further information
Endemism (according to assessment)
Endemic to region
Not assigned
Taxon distribution as listed in assessment
The only UAE records of this species are a skull collected on the Gulf coast in 1973 (Baldwin 2005) and individuals observed off the coast of Fujairah during a survey by the <a href=""http://fujairahwhales.com/pantropical-spotted-dolphin/"">Fujairah Whale and Dolphin Research Project</a> in 2017. Baldwin et al. (1999) collated references to this species from the Arabian Gulf, the Gulf of Oman, the Arabian Sea, Gulf of Aden, and the Red Sea. Globally it is found in all oceans between about 40'°N and 40'°S, although it is much more abundant in the lower-latitude parts of its range (Hammond et al. 2012a, Kiszka and Braulik 2018).
Is there a map available in assessment?
Yes
Habitat and systems
Ecological system type
Terrestrial
Not_assigned
Freshwater
Not_assigned
Marine
Not_assigned
Habitat
Habitat details as listed in assessment
Occurs in offshore waters where it hunts in the thermocline for small pelagic fish. Found in groups from 10 to 300 (Baldwin et al. 1999).
Threats and conservation measures listed
Threats listed in assessment
The main threats to cetaceans in UAE waters include: incidental mortality in trawl, drift and anchored gill nets, depletion of prey populations (due in part to commercial overfishing); ship and boat strikes, disturbance due to underwater noise (including that from vessel traffic, drilling, piling, military operations and seismic activity related to offshore oil and gas exploration). Inshore and shallow-water species are further potentially threatened by entanglement in abandoned fishing gear, coastal development including port and harbour construction, dredging, land reclamation, residential and tourist development, and pollution (especially hydrocarbons). A lack of information (e.g. population size and trend, the location of critical habitats, and feeding ecology) hinders the development of appropriate conservation actions, but this should be used as an excuse for inaction.
History
The backcasted 1996 assessment for this species is Data Deficient which matches the listing given by Hornby (1996).
Publication
Mallon, D., Hilton-Taylor, C., Allen, D., & Harding, K. (2019). UAE National Red List of Mammals: Marine and Terrestrial. A report to the Ministry of Climate Change and Environment, United Arab Emirates (p. 41). IUCN Global Species Programme. https://bit.ly/2RdZCQR