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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Nothobranchiidae (African rivulines)
Etymology: Nothobranchius: Greek, nothos = false + Greek, brangchia = gill (Ref. 45335); milvertzi: The species is named in honour of Finn Christian Milvertz (Solrød Strand, Denmark), renowned breeder and collector of killifish (Ref. 95524).
Environment: milieu / climate zone / depth range / distribution range
البيئة
; المياه العذبة محيطي; pH range: 6.9 - 6.9. Tropical
Africa: ephemeral pools in the Lushiba Marsh, part of Lake Mweru drainage, in Zambia (Ref. 95524).
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 3.7 cm SL ذكر/ مختلط الجنس; (Ref. 95524)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشواك الظهرية (المجموع) : 0; الأشعة الظهرية الناعمة (المجموع) : 15 - 17; شوكة شرجية: 0; أشعه شرجية لينه: 15 - 18. Diagnosis: Nothobranchius milvertzi belongs to the Nothobranchius taeniopygus species-group, presenting the diagnostic characters of this complex of caudal and anal fin with broad light submarginal band and dark distal margin in males (Ref. 95524). Nothobranchius milvertzi is distinguished from all other species of this complex, with the exception of N. malaissei and N. hassoni, by having an anal fin with orange submarginal band and a dark red-brown distal margin (Ref. 95524). It is distinguished from these two last mentioned species by having a red caudal fin with narrow orange semicircular submarginal band and wide dark red-brown distal margin (Ref. 95524). Furthermore, the species presents within the species-group the unique morphometric characters of head length 28.5-31.5% of standard length, interorbital width 39-46% of head length, and snout length 18-20% of head length (Ref. 95524).
The accompanying fauna of the ephemeral pools consisted of non-annual species, such as Barbus haasianus, Lacustricola moeruensis, Protopterus sp. and Pseudocrenilabrus cf. philander (Ref. 95524). The type locality was a large ephemeral pool formed in a river bed, as a standing fragment of the seasonal river, about 50 m long and 10 m wide, and about 2 m deep at its deepest point; the edge of the habitat was heavily overgrown by grass and the aquatic vegetation consisted of Nymphea species; the water was brown and slightly turbid, whereas at shallower parts the bottom of the pool was visible (Ref. 95524). Eggs slightly oval, measuring 1.27-1.36 mm on average, with short filaments on chorion (Ref. 95524).
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
Nagy, B., 2014. Nothobranchius milvertzi, a new species of killifish from the Lushiba Marsh in the Lake Mweru drainage, Zambia (Teleostei: Cyprinodontiformes: Nothobranchiidae). Ichthyol. Explor. Freshwat. 24(4):347-360. (Ref. 95524)
IUCN Red List Status (Ref. 130435)
في خطر (EN) (B1ab(iii)+2ab(iii)); Date assessed: 04 January 2019
استخدامات بشرية
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مصادر علي الأنترنت
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).
مستوى غذائي (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
