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Ancharius griseus Ng & Sparks, 2005

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Ancharius griseus
Picture by Ng, H.H.

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Teleostei > Siluriformes (Catfishes) > Anchariidae (Vaonas)
Etymology: griseus: The specific name comes from the Latin griseus, meaning gray, in reference to its colouration (Ref. 56142).

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

; 淡水 居於水底的.

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Africa: Onilahy River drainage, southcentral Madagascar (Ref. 56142).

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 24.4 cm SL 雄魚/尚未辨別雌雄; (Ref. 56142)

簡短描述 檢索表 | 型態特徵 | 形態測量圖

背棘 (總數) : 2; 背的軟條 (總數) : 6 - 7; 臀棘: 0; 臀鰭軟條: 15; 脊椎骨: 42 - 44. Diagnosis: Ancharius griseus is distinguished from A. fuscus in having a longer dorsal-fin spine, 22.9-24.3% of standard length vs. 14.6-22.6%; longer snout, 49.2-51.3% of head length vs. 40.1-45.8%; smaller eye, 9.3-10.1% of head length vs. 11.4-15.4%; and pectoral spine serrated posteriorly along only its distal half vs. entire length (Ref. 56142).

生物學特性     字彙 (例如 epibenthic)

The river at the type locality runs through grassland/savannah and the habitat can be characterized as mildly disturbed; the water is clear, deep, and swift flowing, with area of calmer water, and the substrate mostly sandy to rocky (Ref. 56142).

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


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

Ng, H.H. and J.S. Sparks, 2005. Revision of the endemic Malagasy catfish family Anchariidae (Teleostei: Siluriformes), with descriptions of a new genus and three new species. Ichthyol. Explor. Freshwat. 16(4):303-323. (Ref. 56142)

IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)

  瀕危 (EN) (B1ab(iii)); Date assessed: 01 July 2016

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.7656   [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).
營養階層 (Ref. 69278):  3.4   ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low vulnerability (20 of 100).