Polydactylus luparensis, Sarawak Giant Threadfin

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Polydactylus luparensis Lim, Motomura & Gambang, 2010

Sarawak Giant Threadfin
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Image of Polydactylus luparensis (Sarawak Giant Threadfin)
Polydactylus luparensis
Picture by Lim, A.P.K.

klasifikasi / Names Nama-nama umum | Sinonim (persamaan) | Catalog of Fishes(Marga, Jenis) | ITIS | CoL | WoRMS | Cloffa

> Carangaria/misc (Various families in series Carangaria) > Polynemidae (Threadfins)
Etymology: Polydactylus: Greek, poly = a lot of + greek, daktylos = finger (Ref. 45335);  luparensis: The specific name luparensis is based on the Batang Lupar River in reference to the holotype locality. Local name of this species is Gemian..

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

; air tawar pelagis, permukaan; kisaran kedalaman 3 - 5 m (Ref. 83753). Tropical; 2°N - 1°N, 111°E - 112°E

Penyebaran Negara-negara | Daerah-daerah FAO | Ecosystems | Kemunculan | Point map | Introduksi | Faunafri

Asia: Malaysia, Borneo. Currently known only from the mouth of the Batang Lupar River, Borneo, Malaysia (Ref. 83753).

Size / Weight / umur

Maturity: Lm ?  range ? - ? cm
Max length : 72.0 cm SL jantan/; (Ref. 83753)

deskripsi pendek Morfologi | Morfometrik

Duri punggung (Keseluruhan (total)): 9; duri punggung lunak (Keseluruhan (total)): 13; Duri dubur 3; Sirip dubur lunak: 11. A species of Polydactylus that differs from all of its congeners by the following combination of characters: 8 dorsal-fin spines, first spine tiny, second spine very strong (its width more than 5 times of width of remaining spines); 13 second dorsal-fin soft rays; 11 anal-fin soft rays; 12 pectoral-fin rays, its length 22–24% (mean 23%) of SL, posterior tip not reaching a vertical through posterior tip of depressed pelvic fin; 6 pectoral filaments, fourth or fifth filament longest, its length 77–85% (mean 81%) of SL, posterior tip extending slightly beyond caudal-fin base; pored lateral-lined scales 67–75 (mean 71); lateral line unbranched, extending onto upper end of lower caudal-fin lobe; 6 scale rows above lateral line, 8 below; 14 gill rakers on upper limb, 18 on lower limb, 32 in total; occipital profile concave; posterior margin of maxilla extending considerably beyond a vertical through posterior margin of adipose eyelid; depth of posterior margin of maxilla 4–5% (mean 5%) of SL, greater than orbit diameter; well-developed swimbladder present; basal half of third to sixth pectoral filament white, becoming black distally. Polydactylus luparensis can be easily distinguished from all Indo-Pacific congeners by having the black distal half of the third to sixth pectoral filaments (whitish in the latter). Only two other taxa, Polynemus melanochir dulcis Motomura & Sabaj, 2002 and P. melanochir melanochir Valenciennes in Cuvier & Valenciennes, 1831, in the family Polynemidae have the black pectoral filaments (Motomura & Sabaj, 2002; Motomura, 2004b) (Ref. 83753).

Biologi     Daftar kata (contoh epibenthic)

Inhabiting turbid brackish water. The species is abundant in the river mouth especially from June to August and mainly caught by gill nets. Juveniles have also been observed in the same place (local fishermen, pers. comm.) (Ref. 83753).

Life cycle and mating behavior Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fecundity | Larva

rujukan utama Upload your references | Acuan | Koordinator | mitra

Lim, P.K.A., H. Motomura and A.C. Gambang, 2010. Polydactylus luparensis, a new species of threadfin (Perciformes: Polynemidae) from the Batang Lupar River, Sarawak, Borneo, Malaysia. Zootaxa 2405:63-68. (Ref. 83753)

Status IUCN Red List (Ref. 130435)

  kekurangan data (DD) ; Date assessed: 21 June 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

ancaman kepada manusia

  Harmless





penggunaan manusia

FAO - Publication: search | FishSource |

informasi lanjut

Negara-negara
Daerah-daerah FAO
Ecosystems
Kemunculan
Introduksi
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Ekologi
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metabolisme
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Fecundity
telur-telur
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Sumber internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | semak peneliti ikan | CISTI | Catalog of Fishes: Marga, Jenis | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genom, Nukleotida | 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: pergi, Cari | World Records Freshwater Fishing | Zoobank | 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=0.00562 (0.00269 - 0.01173), b=3.06 (2.87 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.8   ±0.5 se; based on size and trophs of closest relatives
Daya lenting (Ref. 120179):  sedang, Waktu penggandaan populasi minimum 1.4 - 4.4 tahun (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  High vulnerability (55 of 100).