Gerres oyena (Forsskål, 1775)

Common silver-biddy

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Actinopterygii \| Perciformes \| Gerreidae
Synonyms	Labrus oyena, Diapterus oyena, Smaris oyena, ... more
Common names	Blanche commune, Mojarra común, Black-tipped silver-biddy, ... more

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AquaMaps Data sources: GBIF OBIS

Main reference

Iwatsuki, Y., S. Kimura and T. Yoshino. 1999. (Ref. 35850)
Other references | Biblio | Coordinator : Woodland, David J. | Collaborators

Size / Weight / Age

Max length : 30.0 cm TL male/unsexed; (Ref. 4323); common length : 20.0 cm SL male/unsexed; (Ref. 37816)

Environment

Reef-associated; brackish; marine; depth range ? - 20 m (Ref. 11441)

Climate / Range

Tropical; 32°N - 24°S

Indo-Pacific: Red Sea, Persian Gulf and East Africa, possibly including Seychelles, to the southeastern coasts of India and around Sri Lanka; elsewhere, extending to the western Pacific.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 9; Dorsal soft rays (total): 10; Anal spines: 3; Anal soft rays: 7. Lacks distinctive features and is more slender compared to other similar species (Ref. 48635). U-shaped premaxilla groove mostly without scales (tiny scales anteriorly in specimens over 13 cm SL). Posterior margin of maxillary beyond a vertical through anterior margin of pupil. Body silvery with 6-8 irregular, faint dusky oblique and vertical bands dorsolaterally and ventrolaterally (usually more apparent in young stressed or preserved specimens. Scales between 5th dorsal fin spine and lateral line 3-4, usually 3.5. Pelvic fin when fresh is semi-transparent or dull yellow color with an indistinct dusky band and dull white distal margin posteriorly. Spinous dorsal fin with an indistinct dusky patch (2nd-6th spines) and very narrow dusky distal margins on upper membranes between spines. Supraneural bones 3 (Ref. 35850). G. oyena can be distinguished from G. longirostris (synonym G. acinaces) by its larger scales and dark tip on the dorsal fin (Ref 37816).

Found along the coast, saltwater lagoons, and estuaries (Ref. 5213). Occurs singly or in groups (Ref. 9710). Feeds on small organisms living on sandy bottoms. Utilized as fish meal and duck food. Sold fresh in markets.


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Harmless

Human uses
Fisheries: commercial


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

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Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Low vulnerability (17 of 100)	Medium

Entered by Binohlan, Crispina B.

Modified by Reyes, Rodolfo B.

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Page last modified by : elaxamana, 15 July 2009

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