Taxon name
Gerres longirostris
(Lacepède, 1801)
Uploaded by
National Red List Database
Taxonomic information
Scientific name
Gerres longirostris
(Lacepède, 1801)
Assessed taxon level
Species
Higher level taxonomic groupings
Vertebrates
Fishes
Species authority
(Lacepède, 1801)
Taxonomic notes and synonyms listed
Gerres britannus, G. poieti, and G. acinaces, and four other species, are considered synonyms of G. longirostris (Iwatsuki et al. 2001).
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)
Does the assessment cover a marine EEZ area(s)?
Not_assigned
Conservation Status
Assessed as
Data deficient
Criteria system used
IUCN
(see Assessment details)
Assessment rationale/justification
This demersal, inshore species occurs throughout UAE waters. Catch in Abu Dhabi has declined by 87% since 2010, but a stock assessment conducted in 2015 concluded it was underexploited. Considering the catch declines cannot be explained at this time, and these information are conflicting, it is listed as Data Deficient in the UAE. Improvements in fisheries monitoring are needed.
Assessment details
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. Its depth range is 1 to 12 m (Allen and Erdmann 2012).
Is there a map available in assessment?
Yes
Habitat and systems
Ecological system type
Habitat
Habitat details as listed in assessment
This species inhabits shallow waters over sandy bottoms, from coral reefs to seagrasses and brackish waters (Sommer et al. 1996). Adults are most often found in clear coastal waters, and juveniles are often observed in estuaries or lagoons influenced by freshwater (Iwatsuki et al. 2001). The species occurs singly or in groups and consumes small benthic invertebrates (Lieske and Myers 1994, Iwatsuki et al. 2001). Its maximum total length is 44.5 cm (Randall 1995, Allen and Erdmann 2012) and longevity is 9 years (Hashim and Salamah 1985). This species grows quickly. Off the UAE, the mean size and age at first sexual maturity is 16.3 cm and 1.1 years for males and 20.6 cm and 1.5 years for females (Grandcourt et al. 2006). In a study conducted in the Gulf off Saudi Arabia, size at first sexual maturity was 19.1 and 19.8 cm total length for females and males, and spawning occurred in late spring-early summer (Hosny and Al-Jaber 2017). When applying an age at first reproduction of 1.5 years and longevity of 9 years, its estimated generation length is 5.25 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.
Threats and conservation measures listed
Threats listed in assessment
Overfishing is a potential major threat to this species in the UAE, but this is poorly understood. The large-scale anthropogenic modification of estuarine habitats in the UAE and elsewhere in the Gulf region may impact this species. 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.