Astyanax eremus

Astyanax eremus Ingenito & Duboc, 2014

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

Actinopteri > Characiformes (Characins) 脂鯉目 (Characins) > Characidae (Characins; tetras) 脂鯉科 (Characins; tetras) > Stethaprioninae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mithology (Ref. 45335);  eremus: From the Latin adjective eremus, meaning alone or uninhabited, in allusion to the absence of other fish species in the type locality.

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

; 淡水 底中水層性.   

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

South America: Rio Canivete, upper rio Iguaçu, rio Paraná drainage in Brazil.

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm ?, range 7 - 7.69 cm
Max length : 10.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 96865)

簡短描述 型態特徵 | 形態測量圖

背的軟條 (總數): 11; 脊椎骨: 38. Astyanax eremus belongs to A. scabripinnis species complex . It differs from all members of this species complex by having a subterminal mouth in specimens larger than 4.82 cm SL (vs. mouth terminal in all species). It is further distinguished from all species from this complex, except A. guaricana, A. gymnogenys, A. laticeps, A. obscurus, A. paranae, A. pirabitira A. scabripinnis, A. serratus, and A. varzeae by having 39-41 lateral line scales (vs. 31-38). It can be diagnosed from A. gymnogenys A. laticeps, A. obscurus, A. scabripinnis and A. serratus by its shallower body depth (27.3-31.3% vs. 35.7-39.0%, 35.3-40.6%, 31.6-40.8%, 33% and 34.2-39.7% of SL, respectively). It differs from A. paranae by its longer snout length (21.8-26.8% vs. 16.0-20.4% of HL); from A. guaricana by its shorter interorbital width (23.5-28.4% vs. 32.7-40.9% of HL) and shorter head length (27.1-32.5% vs. 23.9-26.6% of SL); from A. varzeae by its shorter interorbital width (23.5-28.4% vs. 29.8-37.7% of HL), by relatively shorter caudal peduncle length (13.3-16.3%, modally 14.9%, vs. 10.5- 13.9%, modally 12.4%, of SL) and relatively longer snout length (21.8-26.8%, modally 24.5%, vs. 16.4-23.3%, modally 20.1%, of HL); from A. pirabitira by having four to five cusps on the second to fourth tooth in the inner premaxillary series (vs. seven cusps). It can be distinguished from A. burgerai, A. intermedius, A. jacobinae, A. leonidas, A. microschemos, A. ojiara, A. turmalinensis, A. laticeps, A. obscurus, A. pirapuan, A. rivularis, A. serratus, and A. troya by the shape of humeral spot (straight, very narrow and height, occupying two or two and a half scales wide and about six scales height, vs. wide and short with curved or rounded portions, occupying three or more scales wide and less than six scales height in the former seven species and with upper portion wide and something rounded with a vertical projection in A. laticeps, A. obscurus, A. pirapuan, A. serratus, and A. troya) (Ref. 96865).

生物學特性     字彙 (例如 epibenthic)

Occurs in Rio Canivete that runs through a grove of about 1,000 m long and 150 m wide, where the sampling point is located. The sample site was located within the grove with about 0.5-1.0 m depth and about 5 m width, lentic transparent water and sandy and clay bottom variably covered by fallen trees, branches and leaves (Ref. 96865).

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


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

Ingenito, L.F.S. and L.F. Duboc, 2014. A new species of Astyanax (Ostariophysi: Characiformes: Characidae) from the upper rio Iguaçu basin, southern Brazil. Neotrop. Ichthyol. 12(2):281-290. (Ref. 96865)

IUCN 瀕危狀態 (Ref. 123251)

  未評估 

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

 





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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01738 (0.00754 - 0.04005), b=3.02 (2.84 - 3.20), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
營養階層 (Ref. 69278):  2.8   ±0.3 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  .
瀕危性 (Ref. 59153):  Low vulnerability (10 of 100) .