Teleostei (teleosts) >
Osteoglossiformes (Bony tongues) >
Mormyridae (Elephantfishes)
Etymology: Pollimyrus: Because of Dr. Max Poll, ichthyologist + Greek, myros, -ou = the male of the morey eel; cuandoensis: The species name cuandoensis refers to the Kwando (Cuando) River that passes through the Caprivi Strip, Namibia (Ref. 94890).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
Africa: lower section of Kwando River, Caprivi Strip, Namibia (Ref. 94890). Also reported from the Angolan Zambezi basin (Ref. 120641).
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 6.5 cm SL male/unsexed; (Ref. 94890)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 0; Dorsal soft rays (total): 15 - 18; Anal spines: 0; Anal soft rays: 21 - 24. Diagnosis: Number of scales around caudal peduncle 12-16, predorsal length63.3-68.5% of standard length, dorsal fin length 14.0-18.1% of standard length, anal fin length 18.0-24.1% of standard length, distance from pectoral fin origin to pelvic fin origin 15.0-18.7% of standard length, caudal peduncle length 18.9-24.0% of standard length, caudal peduncle depth 32.1-41.4% of caudal peduncle length, length of snout 40.5-50.0% of head length, body depth 24.6-30.5% of standard length, dorsal fin rays 15-18, anal fin rays 21-24, scales in linear series along lateral line row 44-55, distance from tip of snout to anal fin origin 58.4-63.4% of standard length, length of pectoral fin 76.3-92.5% of head length, distance from dorsal fin origin to end of caudal peduncle 37.9-42.6% of standard length, eye diameter 23.7-30.5% of head length, head length 22.5-26.3% of standard length, and distance between the pair of nares of one side 8.31-9.92 times in head length (Ref. 94890). Electric organ discharge with 5 phases and last phase P2 not stronger than P1 (Ref. 94890).
This species prefers to hide in weeds if present, floating or not, often high up in water column, sometimes even at the surface under a water lily leaf in bright sunlight; also found on rocky bottom, hiding in crevices and holes (Ref. 94890). It will often not struggle in weeds brought to shore, so as not to raise attention (Ref. 94890).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae
Kramer, B., H. van der Bank and M. Wink, 2013. Marked differentiation in a new species of dwarf stonebasher, Pollimyrus cuandoensis sp. nov. (Mormyridae: Teleostei), from a contact zone with two sibling species of the Okavango and Zambezi rivers. J. Nat. Hist. 48(7-8):429-463. (Ref. 94890)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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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=0.00562 (0.00251 - 0.01261), b=3.05 (2.85 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.2 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
