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NRLD - 329923 | Epinephelus bleekeri

Assessment ID
329923
Taxon name
Epinephelus bleekeri
(Vaillant, 1878)
Uploaded by
National Red List Database
Taxonomic information
Scientific name
Epinephelus bleekeri
(Vaillant, 1878)
Assessed taxon level
Species
Higher level taxonomic groupings
Vertebrates
Fishes
Kingdom
Animalia
Phylum
chordata
Class
actinopterygii
Order
perciformes
Family
epinephelidae
Genus
Epinephelus
Species
bleekeri
Species authority
(Vaillant, 1878)
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)
A2bcd
Criteria system used
IUCN

(see Assessment details)

Assessment rationale/justification
This reef-associated species occurs throughout UAE waters. It is exploited by grouper fisheries, and is common in local markets in the Arabian Gulf, but apparently less common in UAE markets in general. It appears likely that this species is overfished in the UAE, based on the status of Epinephelus coioides, which this species (E. bleekeri) continues to be confused with in fishery statistics. Anecdotal observations of its occurrence in fish markets over the past 10-29 years indicate that population declines have occurred since about 1995, or a 24-year time period. Catch of E. coioides has declined by about 51% in Abu Dhabi over the past 12 years (since 2007), or approximately one and a half generation lengths. Applying data from a proxy species, three generation lengths is about 24 years. The status of population(s) outside the UAE is not well-understood, though it is also taken by fisheries elsewhere, including in the Sea of Oman. Based on catch data and fish market observations, this species has undergone a suspected decline of at least 30% and possibly more since about 1995, or over the past three generation lengths. Fishing effort is expected to remain the same or increase in the future. Therefore, it is listed as Vulnerable A2bcd. Further action is needed to improve fishery monitoring and data collection. Research on life history parameters is needed to improve the estimate of generation length.
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
This species occurs throughout UAE waters. Globally, it is widespread in the Indo-West Pacific (Heemstra and Randall 1993, K. Rhodes pers. comm. 2016). Its depth range is 3 to 104 metres.
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
This demersal species inhabits mostly shallow coral and rocky banks, can be associated with non-reefal and turbid habitat, and is not known from well-developed coral reefs (Randall 1995). Juveniles can be commonly taken in estuaries. Its maximum standard length is 87 cm (Richu et al. 2018). Life history data are lacking, but due to similarities, Epinephelus maculatus is considered an appropriate proxy to estimate generation length. The age at first maturity for E. maculatus females is 2.8 years and males is 4 years and longevity is 13 years (Rhodes et al. 2016). When applying an age at first reproduction of 3 years and longevity of 13 years, its estimated generation length is 8 years based on the following equation recommended by the IUCN Red List methods: Age at first reproduction + (Age at last reproduction -“ age at first reproduction)/2. Off India, Richu et al. (2018) estimated the longevity as 9.7 years and Kandula et al. (2015) reported a total length at first sexual maturity of about 36 cm.
Threats and conservation measures listed
Threats listed in assessment
Overexploitation is a major threat to this species. Degradation of estuaries (juvenile habitat) has been severe in the UAE and the Arabian Gulf region due to coastal development and pollution. Corals in the UAE and Arabian Gulf have severely declined due to the increasing frequency of mass bleaching events caused by rising water temperatures, which is a consequence of climate change, as well as pervasive coastal development (Riegl et al. 2018, Burt et al. 2019).
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.