Chrysichthys nigrodigitatus (Lacepède, 1803)

Bagrid catfish
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Native range | All suitable habitat
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Chrysichthys nigrodigitatus   AquaMaps   Data sources: GBIF OBIS
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Chrysichthys nigrodigitatus
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分類 / Names 俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii 輻鰭魚綱 (條鰭魚) > Siluriformes (Catfish) > Claroteidae (Claroteid catfishes) > Claroteinae
Etymology: Chrysichthys: Greek, chrysos = golden + Greek, ichthys = fish (Ref. 45335).  More on author: Lacepède.

Environment: milieu / climate zone / depth range / distribution range 生態學

; 淡水 居於水底的; 河川洄游 (Ref. 51243); 深度上下限 3 - ? m (Ref. 13851).   熱帶; 22°C - 28°C (Ref. 12468); 15°N - 13°S, 16°W - 30°E

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Africa: Senegal to Cabinda, Angola (Ref. 3236, 81642). To the north also reported from Mauritania (Ref. 55783), southwards down to the lower Congo River (Ref. 1879) and the Cuanza in Angola (Ref. 120641).
非洲: 塞內加爾到卡賓達,安哥拉。

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm ?, range 14 - ? cm
Max length : 65.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 81642)

簡短描述 型態特徵 | 形態測量圖

背棘 (總數): 2; 背的軟條 (總數): 6; 臀棘 0. Diagnosis: recognized by its pointed snout, the rather small mouth, and the width of the premaxillary tooth plate (1/5-1/3.5, usually 1/4, of head length); vomerine dentition represented by a square to rectangular tooth plate which begins to develop at sizes between 60 and 70 mm standard length; palatine dentition developing at sizes over 100 mm standard length, initially as isolated teeth; second or third branched dorsal-fin ray always the longest; upper caudal-fin lobe much longer than lower lobe; gill rakers long and smooth; other characters, such as length of dorsal fin, number of branched rays in anal fin, and number of gill rakers on first gill arch, are subject to intraspecific variations; sexually mature males and (some) ripe females show considerable morphological differences; such specimens have often been labelled as Chrysichthys furcatus; maturity occurs probably at a rather advanced stage (at over 200 mm SL) and leads to the inflation of head, broadening of mouth and premaxillary tooth plate, shortening of spines and overgrowth of fin-spines by thick skin, the fins becoming more rounded, and the caudal-fin lobes sometimes becoming subequal; the body acquires an emaciated, thinned down appearance (Ref. 57126, 81642). Characters only clear in mature males in reproduction: adipose fin short, base contained 8-11 times in SL and measuring 28-64% of distance between dorsal fin and adipose fin; maxillary barbel not reaching beyond dorsal spine when extended; head swollen; skin mucous; spines thick and covered with skin (Ref. 81642).

生物學特性     字彙 (例如 epibenthic)

Adults occur in shallow waters of lakes (less than 4 m), over mud and fine sand bottom. Omnivorous, feed on seeds, insects, bivalves and detritus (Ref. 13851). Feeding becomes specialized with age and size, larger fish may feed on decapods and fish (Ref. 27935).

出現於湖 (少於 4 公尺) 的淺水域,遍及泥與細砂底部。 雜食性, 吃種子,昆蟲,二枚貝與碎屑。 (參考文獻 13851) 進食變成隨著年齡特殊化與大小, 較大的魚可能吃十足類動物與魚.(參考文獻 27935)

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚

非洲: 塞內加爾到卡賓達,安哥拉。

主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

Risch, L. and E.J. Vreven, 2007. Claroteinae. p. 607-629. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) The fresh and brackish water fishes of Lower Guinea, West-Central Africa. Volume I. Collection Faune et Flore tropicales 42. Institut de Recherche pour le Développement, Paris, France, Muséum National d’Histoire Naturelle, Paris, France, and Musée Royal de l’Afrique Centrale, Tervuren, Belgium. 800 pp. (Ref. 74659)

IUCN 瀕危狀態 (Ref. 120744)

  資料不足 (DD) ; Date assessed: 01 March 2007

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

  無害處的





人類使用

漁業: 低經濟; 養殖: 商業性; 游釣魚種: 是的
FAO(養殖: 產生; 漁業: 產生; publication : search) | FishSource |

更多資訊

俗名
同種異名
新陳代謝
捕食者
生態毒物學
繁殖
成熟度
產卵場
產卵群集
孕卵數

卵發育
參考文獻
養殖
養殖資訊
品種
遺傳學
基因序列
遺傳率
疾病
加工
Mass conversion
合作者
照片
Stamps, Coins Misc.
聲音
神經毒
速度
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鰓區
Otoliths
腦重體重比
眼睛色素

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00717 - 0.01160), b=3.01 (2.94 - 3.08), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
營養階層 (Ref. 69278):  3.2   ±0.41 se; Based on food items.
回復力 (Ref. 69278):  中等的, 族群倍增時間最少 1.4 - 4.4年 (K=0.12-0.65; Fec = 3,086-28,086).
瀕危性 (Ref. 59153):  High vulnerability (60 of 100) .
價格種類 (Ref. 80766):   Unknown.