Gymnogeophagus caaguazuensis

Gymnogeophagus caaguazuensis Staeck, 2006

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Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Actinopteri (ray-finned fishes) > Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Geophaginae
Etymology: Gymnogeophagus: Greek, gymnos = naked + Greek, gea = the earth + Greek, phaegein, to eat (Ref. 45335);  caaguazuensis: Named for the province of Caaguazú, Paraguay, the area of occurrence of the new species; an adjective, masculine form.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic.   Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Paraguay.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 8.6 cm SL male/unsexed; (Ref. 78439)

Short description Morphology | Morphometrics

This small mouthbrooding species possess the following characters: a conspicuous secondary sexual dimorphism; differs from its congeners in having a body that is comparatively deep, short caudal peduncle, lyreate caudal fin of males, scales in E1 row 26-28, and its small size, maximum length 8.63 cm SL (Ref. 78439).

Biology     Glossary (e.g. epibenthic)

Prefers habitats that are bare sandy bottoms among rocky areas in small rivulets which may have a strong current during the rainy season. During the dry season and period of low water, this species is found in pools and ponds with more or less stagnant water. In February, water data collected at the type locality has pH 7.9; electrical conductivity 240 μS/cm; temperature 24.2 °C. Associated fish fauna included Phalloceros caudimaculatus (Poeciliidae), Rineloricaria sp. (Loricariidae) and two small characid species. This species displays a variety of parental care and mating systems ranging from mouthbrooding and polygyny to substrate spawning and monogamy. In the aquarium, breeding was observed and the species was azuensis found to be a delayed (larvophile) maternal mouthbrooder, where like several of its congeners, it starts reproduction like a substrate spawner, i. e. the parents initially spawn on a stone, but just prior to the hatching of the larvae the female picks up the eggs and then orally broods the larvae and young. Courting males, in from of ripe females, display a conspicuous quivering movement of their mouths caused by opening and closing the mouth with extremely high frequency and this peculiar behaviour during courtship seems to be a synapomorphy of the mouthbrooding species, as it has been observed only within this species complex (Ref. 78439).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Kullander, Sven O. | Collaborators

Staeck, W., 2006. Gymnogeophagus caaguazuensis sp. n. - a new species of cichlid fish (Teleostei: Perciformes: Cichlidae) from the drainage of the lower río Paraguay in Paraguay. Zoologische Abhandlungen (Dresden) 56:99-105. (Ref. 78439)

IUCN Red List Status (Ref. 123251)


CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

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Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5005   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02399 (0.01032 - 0.05579), b=3.01 (2.80 - 3.22), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.3   ±0.5 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.).
Vulnerability (Ref. 59153):  Low vulnerability (12 of 100) .