Классификация / Names
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Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Acestrorhamphinae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335); jordanensis: Named after the drainage from where the species is described, the rio Jordão, a tributary to the rio Iguaçu basin.
Eponymy: Astyanax was the son of Hector in Greek mythology. See Homer’s Iliad for details. The reasoning for its use for a genus of characins is not explained. (Ref. 128868), visit book page.
Environment: milieu / climate zone / пределы глубины / distribution range
экология
; пресноводный донно-пелагический. Tropical
South America: Rio Jacu and rio das Torres in the lower portions of the rio Jordão drainage, lower rio Iguaçu basin, Paraná, Brazil
Size / Вес / Возраст
половая зрелость: Lm ? range ? - ? cm
Max length : 7.6 cm SL самец/пол неопределен; (Ref. 81203)
Краткое описание
определительные ключи | морфология | морфометрия
членистые (мягкие) лучи спинного плавника (общее число) : 10 - 11; позвонки: 34 - 37. Distinguished from other congeners by the combination of the following characters: anal fin with 13-17 branched rays; lateral line scales 35-38; one humeral spot; dentary teeth abruptly
decreasing in size after the fifth tooth; orbital diameter 22.6-29.1% of HL; interorbital width 30.6-35.7% of HL; snout length 25.3-29.7% of HL; predorsal scales 12-15; dorsal procurrent rays 10-12; maxillary teeth 1 or 2; and a conspicuous midlateral band from humeral region to caudal peduncle (Ref. 81203).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Feeds on insects and plants (Ref. 81203).
Life cycle and mating behavior
половая зрелость | размножение | нерест | икра | Fecundity | личинки
Vera Alcaraz, H.S., C.S. Pavanelli and V.A. Bertaco, 2009. Astyanax jordanensis (Ostariophysi: Characidae) a new species from the rio Iguaçu basin, Paraná, Brazil. Neotrop. Ichthyol. 7(2):185-190. (Ref. 81203)
Статус Красного Списка МСОП (Ref. 130435: Version 2025-1)
Угроза для людей
Harmless
Использование человеком
дополнительная информация
инструменты
Специальные отчеты
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Estimates based on models
Phylogenetic diversity index (ссылка
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00493 - 0.02437), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trophic level (ссылка
69278): 2.9 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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