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Potamorrhaphis guianensis (Jardine, 1843)

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Potamorrhaphis guianensis
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Brazil country information

Common names: Peixe agulha, Pirapucu
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Recorded from Capim River (Ref. 50279).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/br.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Collette, B.B., 1982
National Database:

Common names from other countries

Классификация / Names народные названия | синонимы | Catalog of Fishes(род, виды) | ITIS | CoL | WoRMS | Cloffa

> Beloniformes (Needle fishes) > Belonidae (Needlefishes)
Etymology: Potamorrhaphis: Greek, potamos = river + Greek, rhaphis = needle (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range экология

; пресноводный пелагический; пределы глубины 0 - ? m.   Tropical; 23°C - 26°C (Ref. 2059)

распространение страны | регионы FAO | Ecosystems | места находок | Point map | интродукции | Faunafri

South America: Amazon and Orinoco River basins, and the Guianas.

Size / Вес / Возраст

Maturity: Lm ?  range ? - ? cm
Max length : 29.1 cm TL самец/пол неопределен; (Ref. 40653); common length : 12.3 cm OT самец/пол неопределен; (Ref. 10994)

Краткое описание определительные ключи | морфология | морфометрия

колючие лучи спинного плавника (общее число) : 0; членистые (мягкие) лучи спинного плавника (общее число) : 29 - 36; колючие лучи анального плавника: 0; членистые (мягкие) лучи анального плавника: 25 - 32; позвонки: 68 - 78. Predorsal scales 85-135, mean 110.3 (Ref. 10994, Table 7).

биология     глоссарий (например epibenthic)

Forms schools at the surface. Prefers to inhabit marshes, small slow-moving creeks or even in main river beds, in the slowest parts of meandering streams next to banks (Ref. 35237). Voracious carnivore which appears to have a primarily nocturnal habit (Ref. 27188). During reproduction, the male positions itself beside the female or crosswise in front of her. Sometimes the male touches the female with his side, pushing her aside in an oblique position, with their heads oriented downwards. The couple settles next to a bush where the female spawns her eggs (15 to 40). Eggs adhere to plants by means of sticky filaments which are 2 to 3 mm long. At 27-30°C, incubation lasts for 9 to 10 days. Larvae are pelagic and carnivorous (Ref. 35237). Maximum length 40 cm TL in Keith et al., 2000 (Ref. 35237).

Life cycle and mating behavior Maturities | размножение | Spawnings | Egg(s) | Fecundities | личинки

The eggs are attached to underwater vegetation. At 27-30 deg. Celsius the larvae hatch after 9 - 10 days. The larvae are pelagic carnivores.

Основная ссылка Upload your references | ссылки | координатор : Collette, Bruce B. | соавторы

Collette, B.B., 1982. South American freshwater needlefishes of the genus Potamorrhaphis (Beloniformes: Belonidae). Proc. Biol. Soc. Wash. 95(4):714-747. (Ref. 10994)

Статус Красного Списка МСОП (Ref. 130435)


CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

  Harmless




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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00126 (0.00056 - 0.00281), b=3.11 (2.93 - 3.29), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.9   ±0.6 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 vulnerability (19 of 100).