Potamothrissa obtusirostris, Bluntnosed sawtooth pellonuline : fisheries

Potamothrissa obtusirostris (Boulenger 1909)

Bluntnosed sawtooth pellonuline
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Potamothrissa obtusirostris
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分類 / Names 俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopteri > Clupeiformes (Herrings) 鯡形目 (Herrings) > Clupeidae (Herrings, shads, sardines, menhadens) 鯡科 (Herrings, shads, sardines, menhadens) > Dorosomatinae
Etymology: Potamothrissa: Greek, potamos = river + Greek, thrissa, -es = shad (Ref. 45335);  obtusirostris: Named for the Lembesse River (Ref. 83895).  More on author: Boulenger.

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

; 淡水 大洋性.   熱帶; 7°N - 8°S

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

Africa: middle and upper Congo River basin (Ref. 3509, 28136, 93833), especially in northern and eastern tributaries (Ref. 188, 122734), and lower Congo River (Ref. 42510), in Central African Republic (Ref. 45441), Republic of Congo (Ref. 83895) and Democratic Republic of the Congo (Ref. 42480).
非洲: 剛果河流域中、上游,也就是北方與東方的支流。

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 6.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 188)

簡短描述 型態特徵 | 形態測量圖

背棘 (總數): 0; 背的軟條 (總數): 13-15; 臀棘 0; 臀鰭軟條: 16 - 20. Diagnosis: Body slender, its depth 18-27% of standard length; pre-pelvic scutes not strongly keeled, beginning under or behind base of last pectoral finray, 7-10 pre-pelvic and 9-12 post-pelvic scutes, belly rounded; snout bluntly rounded; lower jaw not projecting, exactly meeting tip of upper when mouth closed, deepest at mid-point of jaw, with small saw-like teeth on each side; pre-maxillae with small teeth pointing downward; maxilla very slender, its blade over 3 times as long as deep, upper edge ridged, lower edge without denticulations; posterior supra-maxilla very small, spatulate, its shaft about as long as its blade; lower gillrakers 14-16; silver stripe on flank, narrower anteriorly (Ref. 188, 28136). It differs from Potamothrissa whiteheadi in having a distinct shaft to the posterior supra-maxilla and lacking dermal denticles on the snout, and from P. acutirostris in its blunt snout and fewer gillrakers, 14-16 vs. 16-18 (Ref. 188, 28136). Other pellonulines lack saw-like teeth at the sides of the lower jaw (Ref. 188).
身體細長的。 前腹鰭鱗甲不有明顯的龍骨, 開始在或下面最後胸鰭鰭條的在基底正後方,7 到 10+10 到 12. 吻圓的; 下頜不是突出, 完全碰到頂端上面的當嘴巴閉合時, 深的在中央點, 有小的像見到一樣的牙齒在兩邊; 前顎有小的分向朝下的齒; 顎骨非常細長的; 第二個上顎骨非常小的

生物學特性     字彙 (例如 epibenthic)

Found in rivers and streams (Ref. 41580), perhaps not in lakes (Ref. 188). It feeds on aquatic insects and also hydracarians (Ref. 188, 41580).

出現於河川與溪流, 但是可能不在湖中。 吃水生昆蟲 (例如寶刀魚仔魚) 與水螅。

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

非洲: 剛果河流域中、上游,也就是北方與東方的支流。

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

Whitehead, P.J.P., 1985. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/1):1-303. Rome: FAO. (Ref. 188)

IUCN 瀕危狀態 (Ref. 123251)

  無危 (LC) ; Date assessed: 16 February 2009

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

  無害處的





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漁業: 自給性漁業
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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00433 - 0.01920), b=3.03 (2.86 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.2   ±0.40 se; based on food items.
回復力 (Ref. 120179):  高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
瀕危性 (Ref. 59153):  Low vulnerability (10 of 100) .
價格種類 (Ref. 80766):   Low.