Galaxias tantangara, Stocky Galaxias

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Galaxias tantangara Raadik, 2014

Stocky Galaxias
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drawing shows typical species in Galaxiidae.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Galaxiiformes (Southern smelts) 胡瓜魚目 (Southern smelts) > Galaxiidae (Galaxiids) 南乳魚科 (Galaxiids) > Galaxiinae
Etymology: Galaxias: Greek, galaxias, ou = a kind of fish (Ref. 45335);  tantangara: Named fro its type locality, a small alpine stream, a tributary of the upper Murrumbidgee River draining from Mount Tantangara; noun in apposition..

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

; 淡水 底中水層性; 非遷移的; 深度上下限 0 - 1 m (Ref. 98815).

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

Oceania: Australia.

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 10.3 cm FL 雄魚/尚未辨別雌雄; (Ref. 98815); 最大體重: 13.00 g (Ref. 98815)

簡短描述 型態特徵 | 形態測量圖

背的軟條 (總數): 8-11; 臀鰭軟條: 10 - 12; 脊椎骨: 53 - 56. This species is distinguished from its congeners within the Galaxias olidus complex by the following characters: low mean total gill raker count of 10; body stocky and deep through vent and pectoral fin base (12.6-15.6 and 14.9-17.9 % SL); deep caudal peduncle (8.5-10.2 % SL); head obtuse to slightly bulbous in lateral profile and moderately deep (41.4-48.2 % HL) but wide (63.4-72.8 % HL); gape wide (40.2-51.0 % HL and 59.6-72.2 % HW); eye profiles often not visible laterally from ventral view; nostrils are short, not visible from ventral view; caudal fin weakly emarginate to truncate, about as long or slightly longer than caudal peduncle, vertical width of expanded rays usually equal to body depth through the pectoral fin base; caudal peduncle flanges are long, reaching more than half distance to anal fin base; anal fin long (16.3 % SL); most posterior extent of mouth 0.8 eye diameter below ventral margin of eye; dorsal midline is usually flattened anteriorly from above or slightly posterior to pectoral fin bases; no raised lamellae from ventral surface of rays of paired fins; anal fin origin usually under 0.73 distance posteriorly along dorsal fin base; pyloric caeca usually 2, occasionally 1, relatively thin and long (4.7 % SL); gill rakers are short to very short; no distinct black bars along lateral line (Ref. 98815).

生物學特性     字彙 (例如 epibenthic)

Facultative air-breathing in the genus (Ref. 126274); A freshwater fish that is unable to undertake diadromous migrations. Recorded from a small (0.8 m average width and 0.1 m in average depth), cold, clear and fast flowing alpine creek, flowing through an open forest of Eucalyptus, low shrubs and tussock grass, and which is often snow covered during winter. Flow consisted predominantly of riffle and glide, with smaller amounts of cascades. Substrate composed of bedrock, boulder, and cobble, with smaller amounts of pebble and gravel, and sections of silt. Instream cover provided mainly by rock and by bank and vegetation overhang, and pools averaged 0.3 m in depth. Recorded at a density of 1.8 fish/m2 and the only native fish so far recorded from within its range (Ref. 98815).

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 : Berra, Tim M. | 合作者

Raadik, T.A., 2014. Fifteen from one: a revision of the Galaxias olidus Günther, 1866 complex (Teleostei, Galaxiidae) in south-eastern Australia recognises three previously described taxa and describes 12 new species. Zootaxa 3898(1):001-198. (Ref. 98815)

IUCN 瀕危狀態 (Ref. 130435)

  極危 (CR) (B1ab(ii,iii,v)+2ab(ii,iii,v)); Date assessed: 13 February 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00490 (0.00205 - 0.01170), b=3.12 (2.91 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.2   ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).