Olyra astrifera

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Olyra astrifera Arunachalam, Raja, Mayden & Chandran, 2013

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drawing shows typical species in Bagridae.

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

Teleostei (teleosts) > Siluriformes (Catfishes) > Bagridae (Bagrid catfishes)
Etymology: Olyra: Greek, olyra = a kind of grain (Ref. 45335);  astrifera: The specific name refers to the distribution of star- shaped dots all over the body. A feminine noun in adjective..

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

Freshwater; demersal. Tropical

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

Asia: Manimalai River in Kerala, India.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 3.3 cm SL male/unsexed; (Ref. 93959)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 7; Anal soft rays: 15. This species is diagnosed from its congeners, except Olyra horae, by having following characters: adipose fin confluent with caudal base; pectoral fins with weak serrations and strong dentitions internally consisitng of 10-12; anal fin with 15 rays; length of the adipose fin base 31.2-33.2% SL; distance of dorsal fin origin to origin of adipose fin 21.6-22.5% SL; and 17-23 pores of the lateral line canal. It differs from O. horae by having 15 anal fin rays (vs. 21) upper lobe of caudal fin extending posteriorly by a length that is more than half the length of the lower lobe (vs. slightly longer than lower). The following combination of characters separate this species from other congeners: pre-dorsal length 41.9-42.3 % SL; pre-anal length 61.8-66.2 % SL; anal fin base length 23.6-25 % SL; length of the lower lobe of the caudal fin 21.4-21.6 % SL; caudal peduncle length 10-10.6 % SL; caudal peduncle depth 11.1-11.4 % SL; head length 23-23.6 % SL; nasal barbel length 42-42.2% HL; head width at eye 50.5-51.3% HL; eye diameter 12.2-12.9% HL; dorsal fin rays i 6; pectoral fin rays i 6; caudal fin rays 27 rays; pelvic fin length 15-15.1 % SL; pectoral fin length 11.3-12.1% SL; body depth 9.1-9.9% SL; and snout length 32.1-33% SL (Ref. 93959).

Biology     Glossary (e.g. epibenthic)

Inhabits river with relatively clear water, substratum composed mostly of sand and small boulders, width of 62 m, depth from 0.5-4.5 m and 80-90 % riparian cover mostly overhanging vegetation. Encountered in exposed bamboo roots along the edges of the bank with leaf litter and small grasses (Ref. 93959).

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

Main reference Upload your references | References | Coordinator | Collaborators

Arunachalam, M., M. Raja, R.L. Maydem and A. Chandran, 2013. Olyra astrifera a new species of Olyrid catfish from the Western Ghats, Southern India (Teleostei: Bagridae: Olyrininae) and the designation of neotype, Olyra Longicaudata McClelland, 1842 from the North Eastern India. Intl. J. Zool. Res. 3(2):51-60. (Ref. 93959)

IUCN Red List Status (Ref. 130435)


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

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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 | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00384 - 0.01800), b=2.95 (2.77 - 3.13), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.1   ±0.3 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).