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> Characiformes (Characins) > Alestidae (African tetras)
Etymology: Alestes: Greek, alestes, -oy = miller (Ref. 45335).
Etymology: Alestes: Greek, alestes, -oy = miller (Ref. 45335).
Taxonomic Remarks
Three subspecies were described on the basis of different morphological characters: tchadense Blache, 1964, soudanensis and eburneensis Paugy, 1986. However they should rather be considered as populations having equivalent ecological characteristics (D. Paugy, pers,comm 21 Mar. 2013).
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲 生態学
; 新鮮な水 底生の漂泳性; pH range: 6.5 - 7.8; dH range: ? - 30; potamodromous (Ref. 138143). Tropical; 15°C - 35°C
分布 領土 | 国連食糧農業機関の区域 | エコシステム | 事件 | 目的のマップ | 導入 | Faunafri
Africa: Senegal, Gambia, the coastal basins of the Côte d'Ivoire (Comoé, Bandama and Sassandra), Volta, Niger/Benué and Chad basin (Ref. 2880, 81279). Also present in Nile, Omo, Lake Albert and Lake Turkana (Ref. 2880, 28714). Three populations - previously as subspecies - may be distinguished by slight morphological differences but they have the same ecological charasterics: in Nile River, Lake Albert, Omo River and Lake Turkana ('baremoze'); in Senegal River, Gambia River, Tominé River, Volta basin, Niger basin and Chad basin ('soudaniensis'); in coastal basins of Côte d'Ivoire, namely Sassandra River, Bandama River and Comoé River ('eburneensis') (Ref. 42019).
初回成熟時の長さ / サイズ / 重さ / 年齢
成熟: Lm 20.9, range 25 - ? cm
Max length : 43.0 cm TL オス/雌雄の選別がない; (Ref. 2703); 40.0 cm TL (female); 最大公表体重: 500.00 g (Ref. 3023); 最大記録サイズ: 6 年 (Ref. 2758)
Max length : 43.0 cm TL オス/雌雄の選別がない; (Ref. 2703); 40.0 cm TL (female); 最大公表体重: 500.00 g (Ref. 3023); 最大記録サイズ: 6 年 (Ref. 2758)
簡単な記述 検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 0; 背鰭 (合計) : 10; 肛門の骨: 0; 臀鰭: 22 - 31; 脊つい: 41 - 49. Diagnosis: at least 30 gill rakers on lower limb of first gill arch (30-41); 38-51 lateral line scales, with 7.5-9.5 above and 3.5 below; anal fin with three simple rays and 19-28 branched rays; dorsal-fin origin distinctly behind level of pelvic-fin insertions (Ref. 2759, 81279).
Body shape (shape guide): fusiform / normal; Cross section: oval.
Body shape (shape guide): fusiform / normal; Cross section: oval.
Mainly diurnal. There is considerable flexibility in its diet, A. baremoze shifts from zooplankton to zoobenthos, detritus and macrophytes as plankton densities decline (Ref. 28714). Adults are found at a temperature range of 14.6-35.0°C. In the Malamfatori area (Tchad), seine-net fishery on the River Yobe depends on seasonal upstream (from Lake Chad) and downstream migration during the flood (August-December) and dry (January-March) seasons, respectively. Also, there is an intensive gillnet fishery from July-October at the river mouth. A. baremoze moves offshore (in Lake Chad) beginning March.
ライフサイクルと交尾行動 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Spawning cycle from Tables XVI-XVIII of Ref. 2759 for maturity stages 3-4 GSI 1.5-16% from deltaic zone, upstream (Logone-Chari River), downstream (N'Djamena) and in the southeastern archipelago of Lake Chad. Spawning takes place from 16:30-20:00 h. Eggs spawned in one batch representing 15% of weight of female. Mature females dispersed, not forming groups.
主な参考文献
参考文献のアップロード | 参考文献 | コーディネーター | 協力者
Teugels, G.G., C. Lévêque, D. Paugy and K. Traoré, 1988. État des connaissances sur la faune ichtyologique des bassins côtiers de Côte d'Ivoire et de l'ouest du Ghana. Rev. Hydrobiol. Trop. 21(3):221-237. (Ref. 272)
CITES
Not Evaluated
人間に対する脅威
Harmless
人間の用途
水産業: 高い商業の
FAO - Publication: search | FishSource |
より多くの情報
解剖学
カマ
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オトリス
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脳
オトリス
遺伝子の
ゲノム
遺伝子の
ヘテロ接合性
遺伝
遺伝的多様性
ゲノム
遺伝子の
ヘテロ接合性
遺伝
遺伝的多様性
用具
特記事項
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インターネットの情報源
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モデルに基づく推定値
|
系統多様性指数 (参照 82804) |
PD50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.01047 (0.00839 - 0.01307), b=3.02 (2.96 - 3.08), in cm total length, based on LWR estimates for this species (Ref. 93245). |
|
栄養段階 (参照 69278) |
3.1 ±0.35 se; based on food items. |
| Generation time | 1.6 (1.3 - 2.6) years. Estimated as median ln(3)/K based on 10 growth studies. |
|
回復力 (参照 120179) |
手段, １．４年～４．４年の倍増期間の最小個体群 (K=0.42; tm=2-3; tmax=6). |
|
漁業の脆弱性 (Ref. 59153) |
Low vulnerability (22 of 100). 🛈 |
|
価格帯 (Ref. 80766) |
Unknown. |
|
栄養素 (Ref. 124155) |
Calcium = 104 [37, 225] mg/100g; Iron = 1.52 [0.79, 3.43] mg/100g; Protein = 18.4 [16.4, 20.5] %; Omega3 = 0.458 [0.176, 1.204] g/100g; Selenium = 85.2 [36.2, 188.1] μg/100g; VitaminA = 29.9 [11.8, 71.1] μg/100g; Zinc = 1.79 [1.29, 2.49] mg/100g (wet weight); |