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Gymnotus mamiraua
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drawing shows typical species in Gymnotidae.
Classification / Names
Common names
|
Synonyms
| Catalog of Fishes(
genus
,
species
) |
ITIS
|
CoL
|
WoRMS
|
Cloffa
Teleostei (teleosts) >
Gymnotiformes
(Knifefishes) >
Gymnotidae
(Naked-back knifefishes) > Gymnotinae
Etymology:
Gymnotus:
Greek, gymnos = naked (Ref.
45335
)
;
mamiraua:
Named for the Mamirauá lake system and the Mamirauá Sustainable Development Reserve (formerly the Estaçao Ecológica Mamirauá). Noun in apposition.
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal; pH range: 6.9 - 7.3. Subtropical
South America: two whitewater lake systems on the Rio Solimões floodplain of central Amazonia (the Mamirauá lake system near Tefé, and Lago Janauacá near Manaus), Amazonas State, Brazil (Ref.
41292
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 24.3 cm TL male/unsexed; (Ref.
41292
); max. published weight: 40.00 g (Ref.
41292
)
Short description
Morphology
|
Morphometrics
Deep body (body depth 11-13% TL versus 6-10) possessing very thin pale bands (less than 1/5 the width of the dark bands) with sharp (high contrast) margins. Bands are sinuous on the anterior half of the body, and extend clearly to the dorsal midline (Ref.
41292
).
Facultative air-breathing in the genus (Ref.
126274
); Oviparous (Ref.
205
). Males provide parental care in nests excavated for larvae (Ref.
55570
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Parental care is provided by the male. Nests consisted of a group of small juveniles under a dense roots of floating macrophytes which are attended by a single male adult (Ref.
55570
).
Albert, J.S. and W.G.R. Crampton
, 2001. Five new species of
Gymnotus
(Teleostei: Gymnotiformes) from an upper Amazon floodplain, with descriptions of electric organ discharges and ecology. Ichthyol. Explor. Freshwat. 12(3):241-266. (Ref.
41292
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
07 November 2018
CITES
Not Evaluated
Not Evaluated
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=0.00437 (0.00209 - 0.00911), b=2.98 (2.79 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.3 ±0.47 se; based on food items.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (14 of 100).
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Page last modified by :
mrius-barile
- 20 July 2016
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