Cromeria occidentalis

Cromeria occidentalis Daget, 1954

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Cromeria occidentalis
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分类 / Names 俗名 | 同种异名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Actinopteri > Gonorynchiformes (Milkfishes) > Kneriidae (Shellears) > Kneriinae
Etymology: Cromeria: Perhaps related to the prehistoric Stone Age in eastern England; for the stone implements found in Cromer but needs more data.

Environment: milieu / climate zone / depth range / distribution range 生态学

; 淡水 底中水层性; pH range: 6.2 - 7.5.   热带; 25°C - 30°C (Ref. 91322)

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

Africa: basins of upper and middle Niger River, Benoué and upper Volta in Guinea, Mali, Burkina Faso, Ghana, Benin, Cameroon (Ref. 57474), Chad (Ref. 367) and Ivory Coast (Ref. 3066). Probably also in Togo, Nigeria and Niger (Ref. 57474).
非洲: 尼日河上游与中游 (参考文献 57474) , Benoue(参考文献 57474) 与佛塔河上游的流域.(参考文献 57474)

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 4.4 cm SL 雄鱼/尚未辨别雌雄; (Ref. 91321)

简单描述 型态特徵 | 形态测量图

背的软条 (总数): 9-10; 臀鳍软条: 7 - 8; 脊椎骨: 40 - 43. Diagnosis: pelvic fin origin at level of anterior base of dorsal fin; preorbital stripe present; caudal peduncle depth 6.9-11% of SL; dorsal precaudal fin fold not reaching base of dorsal fin; 8-9 pectoral fin rays; 7 pelvic fin rays; 2 supernumerary rays in anal fin; 8 dorsal fin pterygiophores; 9+9 principal caudal fin rays; cephalic lateral line canals and supraorbital bone present; parasphenoid wide, with foramina for internal carotid arteries; neural spine of 2nd vertebra short and wide, only the length of its vertebral centrum and different from subsequent neural spines (Ref. 57474).
眶前骨斑纹呈现。 (参考文献 57474) 在前面背鳍基底的水平的腹鳍.(参考文献 57474) 尾柄深度 6.9-11.0% 的 SL.(参考文献 57474)

生物学特性     字汇 (例如 epibenthic)

Maximum TL was recorded at 4.1 cm (Ref. 3566). Occurs on several substrates from fine mud to rough gravel and plant material; almost never buries into the substrate (Ref. 57474). Feeds on plankton (Ref. 57474, 91322) and phytoplankton (Ref. 91322). Reproduction likely takes place during the rainy season (August to September) (Ref. 57474) at high water levels in floodplains, brooks or rice fields (Ref. 91276, 91322).

钻进沙子里面。 最大体长TL记录为 4.1 公分。 (参考文献 3566)

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼

非洲: 尼日河上游与中游 (参考文献 57474) , Benoue(参考文献 57474) 与佛塔河上游的流域.(参考文献 57474)

主要参考文献 Upload your references | 参考文献 | 合作者 | 合作者

Moritz, T., R. Britz and K.E. Linsenmair, 2006. Cromeria nilotica and C. occidentalis, two valid species of the African freshwater fish family Kneriidae (Teleostei: Gonorhynchiformes). Ichthyol. Explor. Freshwat. 17(1):65-72. (Ref. 57474)

世界自然保护联盟红皮书 (Ref. 123251)

  最不相关 (LC) ; Date assessed: 15 May 2019

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的





人类利用

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.7500   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
回复力 (Ref. 120179):  高度, 族群倍增时间少于 15个月 ().
脆弱性 (Ref. 59153):  Low vulnerability (10 of 100) .