Rhinoptera javanica | UAE National Red List of Marine Species: Reef-building corals, cartilaginous fishes and select bony fishes

Taxa
Rhinoptera javanica | Müller & Henle, 1841
Location
Countries in Assessment
United Arab Emirates
Country ISO code(s)
ARE
Does the assessment cover a marine EEZ area(s)?
Off
Scope (Assessment)
National
Taxon
Taxonomic Group
Vertebrates
Taxonomic Group Level 2
Fishes
Assessed taxon level
Species
Taxon distribution as listed in assessment
The Javanese Cownose Ray occurs throughout UAE waters. Globally, it has a wide range throughout the Indo-West Pacific (Spaet and Berumen 2015, Last et al. 2016).
Habitats and Ecology
Ecological system type
Terrestrial system
No
Freshwater system
No
Marine system
Yes
Habitat
Habitat details as listed in assessment
This species is benthopelagic and occurs over the continental shelf, often close inshore. It is typically solitary or small aggregations (not usually in the very large aggregations like other cownose rays) (Last et al. 2016). Litter size is 1-2 pups per litter (R. W. Jabado unpubl. data), but it is unknown if reproductive periodicity is annual or biennial. It reaches at least 165 cm disc width (DW) (Last et al. 2016). Generation length estimated to be ~15 years based on the smaller (110 cm DW) R. bonasus (Fisher et al. 2014).
Is there a map available in assessment?
Yes
Assessed status
Asessment status in full
Vulnerable
Assessment status abreviation
VU
Assessment status criteria
A2d
Assessment rationale/justification
The Javan Cownose Ray occurs throughout UAE coastal waters. Due to confusion with the Oman Cownose Ray (Rhinoptera jayakari), population data can be uncertain, but it is suspected this species is the rarer of the two that occur in the Arabian Sea region. Serious declines in cownose ray landings have been observed in Pakistan, and of batoids in general in India. It exhibits slow life history characteristics including low fecundity and a low annual rate of population increase. Considering this, the species has a low capacity to recover from even moderate levels of exploitation. It is especially susceptible to exploitation (target and bycatch) in many largely unregulated gill net 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, it is suspected to have declined by at least 30% over the past three generation lengths, or about 45 years. There is no information to confirm that this species is breeding in the UAE and no information confirming the likelihood of a cease in immigration from outside the region, despite ongoing threats and recorded declines. It is listed as Vulnerable A2d.
About the assessment
Assessment year
2019
Assessors/contributors/reviewers listed
UAE National Red List Workshop
Affliation of assessor(s)/contributors/reviewers listed on assessment
Government
IGO
Assessor affiliation specific
Government|IGO
Criteria system
Criteria system specifics
IUCN v3.1
Criteria system used
IUCN
Criteria Citation
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.
Endemism
Endemic to region
Not_assigned
Endemism Notes
Is an endemic?: Not_assigned
Conservation
Threats listed in assessment
This species is impacted by target and bycatch fisheries in the UAE as well as elsewhere in its range. Marine habitats in the Arabian Gulf are experiencing high levels of disturbance 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).
Conservation Measures

Conservation measures:
Conservation measures notes:
Required conservation measures:

Scientific Name Kingdom Phylum Class Order Family Genus
Rhinoptera javanica Animalia Chordata Chondrichthyes Myliobatiformes Rhinopteridae Rhinoptera