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Characiformes (Characins) >
Characidae (Characins; tetras) > Stethaprioninae
Etymology: Oligosarcus: Greek, oligos = small + Greek arkos = anus (Ref. 45335); jacuiensis: The species name jacuiensis is in reference to rio Jacuí in Rio Grande do Sul, Brazil, where most of the specimens were collected. An adjective (Ref. 85166).
Environment: milieu / climate zone / depth range / distribution range
экология
; пресноводный донно-пелагический. Tropical
South America: Jacuí and Uruguay River basins in Rio Grande do Sul, Brazil.
Size / Вес / Возраст
Maturity: Lm ?  range ? - ? cm
Max length : 18.8 cm SL самец/пол неопределен; (Ref. 85166); 20.5 cm SL (female)
Краткое описание
определительные ключи | морфология | морфометрия
членистые (мягкие) лучи спинного плавника (общее число) : 11. Can be diagnosed from all its known congeners, except Oligosarcus jenynsii, Oligosarcus perdido, Oligosarcus acutirostris, Oligosarcus solitarius
and Oligosarcus hepsetus, by the number of perforated lateral line scales (55-65). Shares with the first two species the absence of a premaxillary foramen, present in the last three species and differs from Oligosarcus jenynsii by having a smaller orbital diameter and the tip of the pectoral fin failing to reach the pelvic-fin origin, and from Oligosarcus perdido by the presence of more horizontal scale rows around the caudal peduncle.
Life cycle and mating behavior
половая зрелость | размножение | нерест | икра | Fecundity | личинки
Menezes, N.A. and A.C. Ribeiro, 2010. Oligosarcus jacuiensis (Characiformes: Characidae), a new species from the Uruguay and Jacuí River basins, southern Brazil. Neotrop. Ichthyol. 8(3):649-653. (Ref. 85166)
Статус Красного Списка МСОП (Ref. 130435: Version 2024-1)
Угроза для людей
Harmless
Использование человеком
дополнительная информация
инструменты
Специальные отчеты
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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=0.00933 (0.00418 - 0.02084), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trophic level (Ref.
69278): 4.1 ±0.7 se; based on size and trophs of closest relatives
устойчивость к внешним воздействиям (Ref.
120179): средний (среднего размера), минимальное время удвоения популяции 1.4-4.4 года (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (15 of 100).