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Eupercaria/misc (Various families in series Eupercaria) >
Gerreidae (Mojarras)
Etymology: Gerres: Latin, gerres = a kind of anchovies; cited by Plinius.
More on author: Cuvier.
Environment: milieu / climate zone / distribuzione batimetrica / distribution range
Ecologia
marino; acqua dolce; salmastro demersale; amfidromo (Ref. 51243); distribuzione batimetrica 1 - 50 m (Ref. 4372). Tropical; 26°C - 29°C (Ref. 4959); 32°N - 35°S, 25°E - 171°E
Indo-West Pacific: East Africa and Madagascar to Japan and Australia; New Caledonia (Ref. 26587) and Vanuatu (Ref. 13300). Enters rivers and lakes in Madagascar and the east coast of Africa. Not in the Middle East (Ref. 103159).
Length at first maturity / Size / Peso / Age
Maturità: Lm 19.0 range ? - ? cm
Max length : 39.0 cm TL maschio/sesso non determinato; (Ref. 116875); common length : 15.0 cm SL maschio/sesso non determinato; (Ref. 4967); Età massima riportata: 8 anni (Ref. 116875)
Spine dorsali (totale) : 9; Raggi dorsali molli (totale) : 10 - 11; Spine anali: 2 - 3; Raggi anali molli: 7 - 8.
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Adults are coastal inhabitants found on soft bottoms (Ref. 44894), over sandy substrate (Ref. 12693). Juveniles are found in brackish mangrove estuaries, sometimes enter fresh water (Ref. 2847, 44894), lakes (Ref. 4323), tidal creeks (Ref. 44894) and lower freshwater reaches of rivers (Ref. 12915). Feed on small crustaceans, polychaetes and forams on sand or muddy-sand bottoms (Ref. 12915), worms and insect larvae (Ref. 12693). Length at first reproduction was reported to be around 12 cm SL, for a population in a South African estuary (D. Woodland, pers.comm. 07/13). Salted or made into fish sauce.
Juveniles enter estuaries and mangrove areas at 1 cm SL and stay until they reach maturity, at which stage they move out to sea (Ref. 36558).
Woodland, D.J., 1984. Gerreidae. In W. Fischer and G. Bianchi (eds.) FAO species identification sheets for fishery purposes. Western Indian Ocean fishing area 51. Vol. 2. [pag. var.]. FAO, Rome. (Ref. 3409)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Pesca: scarso interesse commerciale
Strumenti
Special reports
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Fonti Internet
Estimates based on models
Preferred temperature (Fonte Biblio.
123201): 24.8 - 29.1, mean 28.2 °C (based on 1220 cells).
Phylogenetic diversity index (Fonte Biblio.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01230 (0.01001 - 0.01512), b=3.05 (3.01 - 3.09), in cm total length, based on LWR estimates for this species (Ref.
93245).
Trophic level (Fonte Biblio.
69278): 3.3 ±0.2 se; based on diet studies.
Resilienza (Fonte Biblio.
120179): Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (K=0.3-2.7; tmax=8;).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (32 of 100).
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Nutrients (Ref.
124155): Calcium = 140 [77, 253] mg/100g; Iron = 1 [1, 2] mg/100g; Protein = 18.7 [16.8, 20.5] %; Omega3 = 0.24 [0.13, 0.42] g/100g; Selenium = 47.4 [26.5, 88.1] μg/100g; VitaminA = 18.7 [5.9, 46.9] μg/100g; Zinc = 1.42 [0.97, 1.98] mg/100g (wet weight);
