Environment: milieu / climate zone / depth range / distribution range
экология
; пресноводный донно-пелагический; мигрирует в реке (Ref. 51243). Tropical
Africa: Sierra Leone and Liberia (Ref. 2801, 2940, 81282), but exact limits are yet to be confirmed (Ref. 2940, 81282).
Length at first maturity / Size / Вес / Возраст
Maturity: Lm 5.5, range 5 - 6 cm
Max length : 10.0 cm SL самец/пол неопределен; (Ref. 2940)
колючие лучи спинного плавника (общее число) : 0; членистые (мягкие) лучи спинного плавника (общее число) : 10 - 11; колючие лучи анального плавника: 0; членистые (мягкие) лучи анального плавника: 8. Diagnosis: last simple dorsal-fin ray smooth on hind margin; head massive in adults; dorsal profile arched; scale formula 3.5/21-25/3.5; 2.5 scales between lateral line and pelvic-fin base; 12 scales around caudal peduncle; 7-8 branched dorsal fin rays; two pairs of long barbels; anterior barbel reaching to, or extending beyond, posterior half of eye; posterior barbel extending beyond hind margin of eye; lateral line complete and weakly depressed below dorsal fin; maximum reported size 100 mm SL; 3 large well defined spots on sides, 1st before level of dorsal-fin origin, 2nd slightly behind vertical line from last dorsal-fin ray, 3rd at end of caudal peduncle; average distance centres 2nd-3rd spot/distance centres 1st-2nd spot (= RDT) is 1.05-1.11 (Ref. 2940, 81282).
Affinities: B. anniae (streamlined head) (Ref. 2940).
Life cycle and mating behavior
Maturities | размножение | Spawnings | Egg(s) | Fecundities | личинки
Lévêque, C., 1990. Cyprinidae. p. 269-361. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres d'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren, and O.R.S.T.O.M., Paris, 384 p. (Ref. 2940)
Статус Красного Списка МСОП (Ref. 130435)
Угроза для людей
Harmless
Использование человеком
дополнительная информация
инструменты
Специальные отчеты
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ресурсы в Интернет
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=0.01230 (0.00558 - 0.02710), b=2.97 (2.80 - 3.14), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trophic level (Ref.
69278): 2.5 ±0.19 se; based on food items.
Generation time: 1.7 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
устойчивость к внешним воздействиям (Ref.
120179): высокий, минимальное время удвоения популяции до 15 месяцев (K=0.65; tm=1; tmax=4).
Fishing Vulnerability (Ref.
59153): Low vulnerability (19 of 100).
