分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Bryconidae ("Brycon characins") > Bryconinae
Etymology: Brycon: Greek, ebrykon, brykomai = to bite, to gnaw (Ref. 45335); costaricensis: The specific name refers to the country of the type locality: Costa Rica, Atlantic slope, Heredia, Sarapiquí drainage, La Virgen de Sarapiquí, Río Sarapiquí.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 21°C - 34°C (Ref. 95069)
Central America: Wawa basin in northern Nicaragua to Matina basin in southern Costa Rica, Atlantic slope.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 32.5 cm SL 雄魚/尚未辨別雌雄; (Ref. 95069)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 11; 臀鰭軟條: 33 - 37; 脊椎骨: 45. This is distinguished from all congeners in Central America by having 49 to 54 scales in the lateral line (vs. 43 to 48 in Brycon argenteus, 55 to 61 in B. guatemalensis, and more than 64 in B. behreae, B. chagrensis and B. striatulus) and anal fin notably longer than head, with 33 to 37 total rays (vs. an anal fin about equal to length of head, with 24 to 28 total rays in B. argenteus , B. obscurus, and B. petrosus, the last two species with 48 to 55 and 53 to 58 scales in the lateral line, respectively). This species can be further diagnosed from B. guatemalensis by the following combination of characters: 5 or 6 rows of scales between lateral line and pectoral fin base (vs. 7 or 8); 9 to 11 (generally 10) rows of scales between lateral line and dorsal fin base (vs. 10 to 12, generally 11); 5 to 7 (generally 6) rows of scales between lateral line and anal fin base (vs. 7 to 9, generally 8); and a elongated and shallow caudal peduncle, whose length is 1.78 to 2.35 times its depth (vs. a short and deep caudal peduncle, whose length is 1.25 to 1.61 times its depth) (Ref. 95069).
This species is found in lakes, but also abundant in fast-flowing rivers and streams. It occurs at elevation from 0-600 m in lakes, rivers and creeks, and tolerates temperate ranging from 21-34°C (Ref. 95069).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Angulo, A., J. Marlene and M. Gracian-Negrete, 2013. A new species of Brycon (Characiformes: Characidae) from Nicaragua and Costa Rica, with a key to the lower Mesoamerican species of the genus. Zootaxa 3731(2):255-266. (Ref. 95069)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
無危 (LC) ; Date assessed: 08 April 2019
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00633 - 0.03154), b=3.05 (2.87 - 3.23), 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): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (30 of 100).
