Классификация / Names
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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
экология
; пресноводный донно-пелагический. Tropical; 21°C - 34°C (Ref. 95069)
Central America: Wawa basin in northern Nicaragua to Matina basin in southern Costa Rica, Atlantic slope.
Size / Вес / Возраст
Maturity: Lm ? range ? - ? cm
Max length : 32.5 cm SL самец/пол неопределен; (Ref. 95069)
Краткое описание
определительные ключи | морфология | морфометрия
членистые (мягкие) лучи спинного плавника (общее число) : 11; членистые (мягкие) лучи анального плавника: 33 - 37; позвонки: 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
половая зрелость | размножение | нерест | икра | Fecundity | личинки
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)
Статус Красного Списка МСОП (Ref. 130435: Version 2024-2)
Угроза для людей
Harmless
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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).
Trophic level (Ref.
69278): 2.8 ±0.3 se; based on size and trophs of closest relatives
устойчивость к внешним воздействиям (Ref.
120179): высокий, минимальное время удвоения популяции до 15 месяцев (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (30 of 100).
