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.; festivus: Name from Latin adjective meaning merry, handsome (Ref. 86444).
More on author: Heckel.
Issue
Redescription by Kullander & Silfvergrip (1991: 420), with bibliography, diagnosis, description, distribution, and illustrations.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; pH range: 6.0 - 8.0; dH range: 4 - 6; non-migratory. Tropical; 25°C - 34°C (Ref. 40602)
South America: Paraná River basin, in the Paraguay River drainage in Brazil and Paraguay; Amazon River basin, in the Guaporé (Brazil and Bolivia), Madre de Dios (Peru), Mamoré (Bolivia), Jamari and Tapajós (Brazil) River drainages.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 12.1 cm SL male/unsexed; (Ref. 111115); max. published weight: 97.41 g (Ref. 111115)
Reported to reach around 10 cm SL (Ref. 81048). Tapajos (NRM) specimens were taken from a sandy shore at Aveiro and a small creek at Santarem, close to vegetation and with mud and sand bottom; Vila Bela da Santfssima Trinidade (NRM) specimens were seined in the shadow of the ferry, in shallow water with much aquatic vegetation; while from Madre de Dios, one sample was seined from a pool in a stream with clear, slightly tinted water and no vegetation; another, mixed sample came from a small stream and nearby cattle pool (Ref. 86444).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae
Kullander, S.O., 2003. Cichlidae (Cichlids). p. 605-654. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36377)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Fisheries: highly commercial; aquarium: highly commercial
Tools
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Internet sources
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=0.03548 (0.01921 - 0.06555), b=3.10 (2.94 - 3.26), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (Ref.
69278): 2.5 ±0.23 se; based on food items.
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (tm<1).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
