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Mesonauta egregius
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Mesonauta egregius
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DATZ
Teleostei (teleosts) >
Cichliformes
(Cichlids, convict blennies) >
Cichlidae
(Cichlids) > Cichlasomatinae
Etymology:
Mesonauta:
Name not explained by Günther; probably from the Greek 'mesos' meaning middle or average, and 'nautes' for sailo (alternatively from Latin 'nauta' or sailor; the name perhaps refers to he position of dorsal fin origin posterior to the pelvic fin which was the author's principal diagnostic character.
;
egregius:
Name from a Latin adjective 'egregius' meaning eminent or distinguished.
.
More on authors:
Kullander
&
Silfvergrip
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; pH range: 4.8 - ?. Tropical; ? - 30°C (Ref.
40602
)
South America: Orinocoa River basin, in the Meta and Vichada River basins.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 8.2 cm SL male/unsexed; (Ref.
36377
)
Short description
Morphology
|
Morphometrics
This species is distinguished by the lower metamerie meristics than its congeners: dorsal fin count usually XIV.ll instead of XV.l0-l1, anal fin count usually VILlI which is not found in other Mesonauta species, El row scales usually 24 instead of 25 or 26, vertebrae 13+13 instead of 12+14 or 13+14. Bar 6 is split ventrally, but unlike in M. mirificus with similar pattem, there are no horizontal stripes along the sides . It is distinguished from the geographically c!ose M. insignis also by deeper body (50.7-55.6%SL vs 47.6-53.4%SL) and shorter snout (8.9-11.0% vs 1O.2-13.0%SL), and by having plain coloured instead of reticulated dorsal pigment pattern (ref.
86444
).
In shallow water among aquatic plants (Ref.
40602
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Kullander, S.O. and A.M.C. Silfvergrip
, 1991. Review af the South American cichlid genus
Mesonauta
Gunther (Teleostei, Cichlidae) with descriptions af two new species. Revue suisse Zoo!. 98(2):407-448. (Ref.
86444
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
28 October 2020
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
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02692 (0.01216 - 0.05956), b=3.04 (2.86 - 3.22), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.3 ±0.4 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).
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- 20 July 2016
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