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Nannocharax usongo Dunz & Schliewen, 2009

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No image available for this species;
drawing shows typical species in Distichodontidae.

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

> Characiformes (Characins) > Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335)usongo: Named in honor of Dr. Leonard Usongo, highly successful conservation biologist and supporter of numerous fish inventories in Cameroon (Ref. 80507).
Eponymy: Leonard Usongo is a Cameroonian biologist who has worked as a WWF Project Leader in his country. He was honoured as a “…highly successful conservation biologist and supporter of numerous fish inventories in Cameroon”. (Ref. 128868), visit book page.

Environment: milieu / climate zone / пределы глубины / distribution range экология

; пресноводный пелагический. Tropical; 6°N - 5°N, 6°E - 10°E

распространение страны | регионы FAO | Ecosystems | места находок | карта точек | интродукции | Faunafri

Africa: Cross River and Niger Delta (Ref. 80507).

Size / Вес / Возраст

половая зрелость: Lm ?  range ? - ? cm
Max length : 4.4 cm SL самец/пол неопределен; (Ref. 80507)

Краткое описание определительные ключи | морфология | морфометрия

колючие лучи спинного плавника (общее число) : 0; членистые (мягкие) лучи спинного плавника (общее число) : 10 - 14; колючие лучи анального плавника: 0; членистые (мягкие) лучи анального плавника: 10 - 12. Diagnosis: Nannocharax usongo is distinguished from all other described Nannocharax species by its very small distance between the posterior border of the anus and the articulation of first anal-fin ray (0.9–1.9 vs. 2.2–14.2% of standard length), its body coloration, which consist of 7–11 mostly big blotches along the lateral line often coalesced to one wide black band, and 7–12 small blotches along the dorsum (Ref. 80507).
Body shape (shape guide): elongated; Cross section: compressed.

биология     глоссарий (например epibenthic)

Type specimens collected on logs in areas of relatively rapid water movement; logs had a very rugged surface due to being partially decomposed by wood eating Povilla (Ephemeroptera) larvae; individuals were spaced singly and moved very rapidly around log surface, but always with close contact to it and never reaching out into the free water column; first ray of pelvic fin very thick, which is adaptation to cling on wood in strong current; mouth subinferior and blunt (Ref. 80507).

Life cycle and mating behavior половая зрелость | размножение | нерест | икра | Fecundity | личинки

Основная ссылка Upload your references | ссылки | координатор | соавторы

Dunz, A.R. and U.K. Schliewen, 2009. Description of two new species of Nannocharax Günther, 1867 (Teleostei: Characiformes: Distichodontidae) from the Cross River, Cameroon. Zootaxa 2028:1-19. (Ref. 80507)

Статус Красного Списка МСОП (Ref. 130435: Version 2024-2)


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

  Harmless





Использование человеком

рыболовство: потенциальный рыбохозяйственный объект
FAO - Publication: search | FishSource |

дополнительная информация

Trophic ecology
Food items (preys)
состав пищи
потребление пищи
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хищники
экология
экология
Home ranges
Population dynamics
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Max. ages / sizes
Length-weight rel.
Length-length rel.
Размерный состав
Mass conversion
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Life cycle
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половая зрелость
Maturity/Gills rel.
Fecundity
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икра
Развитие икры
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Estimates based on models

Phylogenetic diversity index (ссылка 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00189 - 0.01058), b=3.17 (2.96 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (ссылка 69278):  3.1   ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100). 🛈
Категория цены (Ref. 80766):   Unknown.