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NRLD - 330015 | Chaenogaleus macrostoma

Assessment ID
330015
Taxon name
Chaenogaleus macrostoma
(Bleeker, 1852)
Uploaded by
National Red List Database
Taxonomic information
Scientific name
Chaenogaleus macrostoma
(Bleeker, 1852)
Assessed taxon level
Species
Higher level taxonomic groupings
Vertebrates
Fishes
Kingdom
Animalia
Phylum
chordata
Class
chondrichthyes
Order
carcharhiniformes
Family
hemigaleidae
Genus
Chaenogaleus
Species
macrostoma
Species authority
(Bleeker, 1852)
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
Vulnerable
Abbreviated status
VU
Qualifying criteria (if given)
A2cd
Criteria system used
IUCN

(see Assessment details)

Assessment rationale/justification
The Hooktooth Shark occurs throughout UAE coastal waters, and may be uncommon there. Although there are limited data on its status, other shark species in the Arabian Gulf have undergone significant declines due to exploitation. It is caught in gill net, line and trawl fisheries in the Arabian Sea region, although it is never abundant. It is especially susceptible to exploitation (target and bycatch) in many largely unregulated gill net, longline and trawl fisheries that operate within its range outside and surrounding UAE waters. Some management measures are now in place in the Arabian Sea region, although domestic fisheries are likely to continue. Though data specifically from the UAE are not available, individuals in the UAE are a component of a larger, interconnected and migratory population that occurs broadly in the north-western Indian Ocean. It is inferred that declines reported in the Arabian Sea region are representative of its status in the UAE. Based on recorded levels of exploitation and decline in habitat quality, it is suspected to have declined by 30-50% over the past three generation lengths, or about 24 years. It is listed as Vulnerable A2cd.
Assessment details
Year assessed
2019
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 Hooktooth Shark occurs throughout UAE waters. Globally, it is wide-ranging but patchily distributed in the Indo-West Pacific.
Is there a map available in assessment?
Yes
Habitat and systems
Ecological system type
Terrestrial
Not_assigned
Freshwater
Not_assigned
Marine
Yes
Habitat
Habitat details as listed in assessment
The Hooktooth Shark is found inshore on continental and insular shelves to depths of at least 160 m (Weigmann 2016). This species grows to a maximum size of around 93 cm total length (TL) with males maturing at around 72 cm TL and females at least 83 cm TL (Moore et al. 2012, Moore and Pierce 2013, Jabado et al. 2016). It is thought to be a viviparous species giving birth to four young per litter with pups born at ~20 cm TL. Henderson et al. (2004) provided preliminary ageing data that suggested the maximum age was 11 years and maturity at 5 or 6 years. This suggests a generation length of 8 years.
Threats and conservation measures listed
Threats listed in assessment
In the UAE, sharks have been impacted by targeted commercial fisheries until 2014 when a ban on export of sharks was imposed (Ministry of Climate Change and Environment). Sharks continue to be impacted by artisanal and bycatch fisheries (Annual Fisheries Statistical Report for Abu Dhabi Emirate 2001-2018), though catch data are not species-specific. This species is impacted by bycatch fisheries that are active elsewhere in its range. Marine habitats in the Gulf are experiencing high levels of disturbance and quickly deteriorating due to major impacts from development activities (including dredging and reclamation), desalination plants, industrial activities, habitat destruction through the removal of shallow productive areas and major shipping lanes (Sheppard et al. 2010).
Publication
Ralph, G.M., Stump, E., Linardich, C., Bullock, R.W., Carpenter, K.E., Allen D.J., Hilton-Taylor, C., Al Mheiri, R., and Alshamsi, O. 2021. UAE National Red List of Marine Species: Reef-building corals, cartilaginous fishes and select bony fishes. 2021. Ministry of Climate Change and Environment, Dubai, United Arab Emirates.