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Eupercaria/misc (Various families in series Eupercaria)
鱸形目 (Various families in series Eupercaria) >
Gerreidae (Mojarras)
銀鱸科 (Mojarras)
Etymology: Gerres: Latin, gerres = a kind of anchovies; cited by Plinius.
Eponymy: This is a toponym referring to the River Niger; the river (or its mouth, in the case of marine species) being the type locality. (Ref. 128868), visit book page.
More on author: Günther.
Environment: milieu / climate zone / 深度上下限 / distribution range
生態學
海洋; 半鹹淡水 底中水層性; 深度上下限 ? - 60 m (Ref. 57394). 熱帶; 18°N - 17°S, 29°W - 14°E
Eastern Atlantic: west African coast, from Guinea to Congo (Ref. 57394). Also reported from Senegal (Ref. 4323, 28587, 33587), Gambia (Ref. 5476), Guinea-Bissau (Ref. 26999) and as far south as Angola (Ref. 3166).
東大西洋: 塞內加爾到安哥拉.(參考文獻 3166)
Length at first maturity / 大小 / 重量 / 年齡
成熟度: Lm 8.8, range 7 - ? cm
Max length : 20.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 57394); common length : 15.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 2683)
背棘 (總數) : 9; 背的軟條 (總數) : 10; 臀棘: 3; 臀鰭軟條: 8. Diagnosis: body oblong and compressed; snout pointed, shorter than eye diameter; mouth strongly protrusible; nostrils contiguous, situated at midpoint between eye and snout tip; dorsal fin deeply notched; pectoral fins long, reaching to, or extending beyond anal-fin origin; large cycloid scales; scales of the interocular space not reaching anterior border of eyes; spinous part of dorsal fin greyish, without a black spot at tip (Ref. 57394).
Coloration: back olivaceous-brown, sides silvery, with longitudinal dark bands; young individuals with narrow, dark vertical bars on sides; spinous part of dorsal fin distally greyish, but without a distinct black spot at tip; juveniles with 2 longitudinal series of dark spots on dorsal fin (Ref. 57394).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Occurs on littoral mud and sand bottoms to about 60 m depth (Ref. 57394). Often enters estuaries and coastal lagoons (Ref. 7375) during reproduction (Ref. 57394). Feeds on fish, shrimps, mollusks, plankton and detritus (Ref. 28587).
時常進入河口與岸邊潟湖。 (參考文獻 7375) 吃魚，蝦，軟體動物，浮游生物與碎屑。 (參考文獻 28587)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
東大西洋: 塞內加爾到安哥拉.(參考文獻 3166)
Roux, C., 1986. Gerridae. p. 325-326. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels; MRAC, Tervuren; and ORSTOM, Paris. Vol. 2. (Ref. 4323)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-1)
無危 (LC) ; Date assessed: 14 July 2014
人類使用
漁業: 商業性
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Estimates based on models
Preferred temperature (參考文獻
123201): 23 - 28, mean 26.5 °C (based on 78 cells).
Phylogenetic diversity index (參考文獻
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00564 - 0.01943), b=3.07 (2.91 - 3.23), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
營養階層 (參考文獻
69278): 3.2 ±0.51 se; based on food items.
Generation time: 0.7 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
回復力 (參考文獻
120179): 高度, 族群倍增時間少於 15個月 (K=1.5; tm<1).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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Climate Vulnerability (Ref.
125649): High vulnerability (64 of 100).
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Nutrients (Ref.
124155): Calcium = 172 [85, 323] mg/100g; Iron = 1 [1, 2] mg/100g; Protein = 18 [16, 20] %; Omega3 = 0.267 [0.132, 0.505] g/100g; Selenium = 50.4 [27.3, 98.0] μg/100g; VitaminA = 30.3 [9.0, 78.5] μg/100g; Zinc = 1.9 [1.3, 2.7] mg/100g (wet weight);
