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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Nothobranchiidae (African rivulines)
Etymology: Nothobranchius: Greek, nothos = false + Greek, brangchia = gill (Ref. 45335); capriviensis: The species name capriviensis represents a toponym after the Caprivi Strip, the historical name for the narrow extension of northeastern Namibia, where this species occurs; this part of Namibia was originally named after the German statesman Count Leo von Caprivi (Ref. 116076).
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt Tầng nổi. Tropical
Africa: eastern part of the Zambezi Region of Namibia (Ref. 116076).
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ?  range ? - ? cm
Max length : 5.0 cm SL con đực/không giới tính; (Ref. 116076)
Short description
Hình thái học | Sinh trắc học
Các tia vây lưng cứng (tổng cộng): 0; Các vây lưng mềm (tổng cộng): 15-18; Tia cứng vây hậu môn 0; Tia mềm vây hậu môn: 16 - 18. Diagnosis: Nothobranchius capriviensis is known only as blue form, in contrast to N. kafuensis, its closest relative, that occurs as red, blue and intermediate forms; while there are general similarities in male colouration between N. capriviensis and the blue form of N. kafuensis, there are also consistent differences: the male N. capriviensis can be distinguished by the paler shade of blue than the blue phenotype of N. kafuensis, the lack of orange-red scale margins and the orange-red colour on the head of the latter species, and a more prominent and consistent barring on the body of the former; differences in female colouration are not as obvious: scale centers of N. capriviensis are iridescent light blue, whereas those of female N. kafuensis are less prominently blue and have a silver hue (Ref. 116076). Morphologically and meristically, the male N. capriviensis differs from that of N. kafuensis by a deeper body, its mean 35.4% of standard length vs. 31.4%, longer head, its mean 32.5% of standard length vs. 30.7%, a more posterior position of the anal fin, pre-anal length 62.3% of standard length vs. 60.5%, and a higher number of scales around the caudal peduncle, 14-16 vs. 13-14; female N. capriviensis have a more posterior position of the anal fin, pre-anal length 63.9% of standard length vs. 66.8%, when compared with N. kafuensis
Found in large, relatively shallow ephemeral pools, which dry up completely on a seasonal basis (Ref. 116076). Eggs deposited in the mud substrate by the adult fish survive therein through the dry season, experiencing a number of phases of development with intervening diapauses; the eggs then hatch at the onset of the rainy season; growth of the fry is rapid and sexual maturity may be attained within four to six weeks (Ref. 116076).
Life cycle and mating behavior
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Watters, B.R., R.H. Wildekamp and K.M. Shidlovskiy, 2015. Description and biogeography of Nothobranchius capriviensis, a new species of annual killifish from the Zambezi Region of Namibia (Cyprinodontiformes: Nothobranchiidae). J. Am. Killifish Ass. 47(4-6):97-133. (Ref. 116076)
IUCN Red List Status (Ref. 130435)
Endangered (EN) (B1ab(iii,iv,v)+2ab(iii,iv,v)); Date assessed: 20 October 2018
Threat to humans
Harmless
Human uses
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Age/SizeSự sinh trưởngLength-weightLength-lengthLength-frequenciesSinh trắc họcHình thái họcẤu trùngSự biến động ấu trùngBổ xungSự phong phúBRUVS
Các tài liệu tham khảoNuôi trồng thủy sảnTổng quan nuôi trồng thủy sảnCác giốngDi truyềnElectrophoresesDi sảnCác bệnhChế biếnNutrientsMass conversion
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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=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).