Polydactylus macrophthalmus, River threadfin : aquarium

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Polydactylus macrophthalmus (Bleeker, 1858)

River threadfin
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    Polydactylus macrophthalmus
    Picture by FAO
  • Image of Polydactylus macrophthalmus (River threadfin)
    Polydactylus macrophthalmus
    Juvenile picture by FAO

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

Teleostei (teleosts) > Carangaria/misc (Various families in series Carangaria) > Polynemidae (Threadfins)
Etymology: Polydactylus: Greek, poly = a lot of + greek, daktylos = finger (Ref. 45335).
More on author: Bleeker.

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

Freshwater; demersal. Tropical

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

Asia: Kapuas River, Kalimantan and the Musi and Batanghari rivers, Sumatra, Indonesia.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 52.0 cm TL male/unsexed; (Ref. 9685)

Short description Morphology | Morphometrics

Dorsal spines (total): 9; Dorsal soft rays (total): 13-14; Anal spines: 3; Anal soft rays: 11. Occipital profile concave in adults. Pectoral filaments 7 with 3 filaments extending beyond caudal fin base and the fifth extending beyond tip of caudal fin lobe. Long pectoral fin rays, 24-26% of SL (Ref. 40968, 41110).

Biology     Glossary (e.g. epibenthic)

Known only from three rivers on two Indonesian islands: Kapuas River, Kalimantan and Musi and Batanghari rivers, Sumatra. These rivers were part of one large river, the ancient Central or North Sunda River, on the Sundaland during the Pleistocene, the last cold period about 12,000 years ago. Geographic evidence indicates that the species was well adapted to the freshwater basins in this extensive Pleistocene river, whereas other Polydactylus species are generally marine. With Sundaland submerged to about 100 m, this species is now restricted to the 3 presently known localities. The longer pectoral filaments and a more slender body have been considered as an adaptation to its freshwater existence. The long pectoral filaments are useful as a sense organ to search for food in muddy waters (Ref. 40968). A food fish along the Kapuas River, Borneo (Ref. 9685).

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

Main reference Upload your references | References | Coordinator | Collaborators

Motomura, H., 2004. Threadfins of the world (Family Polynemidae). An annotated and illustrated catalogue of polynemid species known to date. FAO Spec. Cat. Fish. Purp. Rome: FAO. 3:117 p. (Ref. 57343)

IUCN Red List Status (Ref. 130435)

  Data deficient (DD) ; Date assessed: 21 June 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Aquarium: commercial
FAO - Publication: search | FishSource |

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
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Food consumption
Ration
Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
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Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
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BRUVS
References
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Aquaculture profile
Strains
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Stamps, Coins Misc.
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Ciguatera
Speed
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Gill area
Otoliths
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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | 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 | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01738 (0.00751 - 0.04023), b=3.05 (2.86 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.7   ±0.5 se; based on size and trophs of closest relatives
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (41 of 100).