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Characiformes (Characins) >
Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335); signifer: The Latin word signifer meaning 'colour sergeant' or 'standard bearer' refers to the unusual red-orange colour on the dorsal fin; a noun in apposition (Ref. 85591).
Environment: milieu / climate zone / depth range / distribution range
ນິເວດວິທະຍາ
; ນ້ຳຈືດ ອາໄສຢູ່ໃກ້ໜ້າດິນໃຕ້ພື້ນທ້ອງນ້ຳ; pH range: 7.0 - 7.4. Tropical; 28°C - 29°C (Ref. 85591)
Africa: Ouémé River basin in Benin (Ref. 85591).
ຂະໜາດ / ນ້ຳໜັກ / Age
Maturity: Lm ? range ? - ? cm
Max length : 5.7 cm SL ຕົວຜູ້/ບໍ່ມີເພດ; (Ref. 85591)
Short description
ຕົວທີ່ໃຊ້ໃນການຈຳແນກຊະນິດ | ສະລີລະວິທະຍາ | ການວັດແທກຮູບຮ່າງລັກສະນະພາຍນອກຂອງດິນ,ສັດ,ປາ…
ຄີ (ໜາມ)ແຂງຢູ່ຫຼັງປາ (ທັງໝົດ) : 0; ຄີຫຼັງຂອງປາ (ຄີອ່ອນ) (ທັງໝົດ) : 12 - 14; ຄີ(ໜາມ) ແຂງຢູ່ຄີກົ້ນປາ
ກຸ່ມປາກະດູກແຂງ
ຄວາມຖີ່ຂອງກຸ່ມຖ່າຍທອດພັນ
ປາທີ່ມີການເຄື່ອນຍ້າຍຈາກທະເລໄປຫານ້ຳຈືດ ແລະນ້ຳຈືດຫາທະເລ
ປາທີ່ມີການເຄື່ອນຍ້າຍຈາກທະເລແລະໄປໄຂ່ຢູ່ນ້ຳຈືດ
ຄີກົ້ນຂອງປາ
ສັດທີ່ມີກະດູກສັນຫັຼງ
ການຖ່າຍທອດທາງກຳມະພັນຈາກພໍ່ແມ່ຫາລູກ: 0; ຄີກົ້ນຂອງປາ: 10 - 11; ສັດທີ່ມີກະດູກສັນຫຼັງ: 38 - 39. Diagnosis: Nannocharax signifer is distinguished from all other Nannocharax species in West Africa by the red-orange colouration of the anterior part of its dorsal fin (Ref. 85591). The combination of the following characters is also diagnostic: no continuous black band along the flank; multiple x-shaped body colour pattern extending on the lower half of the flank; 46-48 lateral line scales; and 4-5 scales between anus and origin of anal fin (Ref. 85591).
Found in a narrow forest stream with dense vegetation on its banks and with bottom substrate of mud, sand, leaves, roots and drift wood; also found in larger streams with only spare vegetation in the form of small bushes and solitary trees and with bottom substrate consisting mainly of sand and gravel (Ref. 85591).
Life cycle and mating behavior
Maturities | ການສືບພັນ | Spawnings | Egg(s) | Fecundities | ຕົວອ່ອນ
Moritz, T., 2009. Nannocharax signifer, a new species of fish (Characiformes: Distichodontidae) from the Ouémé River basin, Benin. Ichthyol. Explor. Freshwat. 20(4):289-294. (Ref. 85591)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
ເຄື່ອງມື
Special reports
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ແຫຼ່ງອີນເຕີເນັດ
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=0.00380 (0.00147 - 0.00981), b=3.11 (2.88 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
ຊັ້ນເຂດຮ້ອນ (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
