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Cypriniformes (Carps) >
Leuciscidae (Minnows) > Laviniinae
Etymology: Ptychocheilus: Greek, ptyx, ptychos = fold + Greek, cheilos = lip (Ref. 45335).
More on author: Ayres.
Environment: milieu / climate zone / depth range / distribution range
экология
; пресноводный демерсальный. Temperate; 39°N - 35°N
North America: Sacramento-San Joaquin, Pajaro-Salinas, Russian, and Clear Lake drainages in California, USA. Introduced elsewhere in California, including Eel River and tributaries to Morro Bay.
Size / Вес / Возраст
Maturity: Lm ? range ? - ? cm
Max length : 140 cm TL самец/пол неопределен; (Ref. 5723); common length : 40.0 cm TL самец/пол неопределен; (Ref. 12193); наибольший возраст (опубликованны данные): 9 годы (Ref. 72486)
Краткое описание
определительные ключи | морфология | морфометрия
членистые (мягкие) лучи анального плавника: 8. Dorsal fin usually with 8 rays; anal fin with 8 rays; 38-44 scales on back from head to dorsal fin; 65-78, usually 67-75, scales on lateral line; and 12-15 scales above lateral line (Ref. 86798).
Inhabits rocky and sandy pools and runs of small to large rivers. Usually found in clear, warm streams (Ref. 5723). Voracious minnow with pike-like habits. Small pikeminnows (less than or equal to 7 cm SL) are found in shallow water with cover and lower velocities. The microhabitat use of these juveniles is controlled by the presence of large pikeminnows which connotes intraspecific predation. The microhabitat shift is observed to be significantly influenced by the presence rather than the number of large pikeminnows in the area (Ref. 55069).
Life cycle and mating behavior
Maturities | размножение | Spawnings | Egg(s) | Fecundities | личинки
Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)
Статус Красного Списка МСОП (Ref. 130435)
Угроза для людей
Harmless
Использование человеком
рыболовство: не имеет хозяйственного значения; наживка: usually
дополнительная информация
инструменты
Специальные отчеты
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ресурсы в Интернет
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trophic level (Ref.
69278): 2.0 ±0.2 se; based on size and trophs of closest relatives
устойчивость к внешним воздействиям (Ref.
120179): очень низкий, минимальное время удвоения популяции более 14 лет (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (84 of 100).
