Viet Nam country information

Common names: Black-backed needlefish, Cá Nhói lưng đen, Keel-jawed needle fish
Occurrence: native
Salinity: marine
Abundance: occasional (usually not seen) | Ref: Nguyen, H.P. and N.T. Nguyen, 1994
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from the Gulf of Tonkin and central Vietnam (Ref. 9706).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/vm.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Duong, T.T., 2001
National Database:

Common names from other countries

Keel-jawed, Black-finned long-tom, Needlefish, ... more

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

> Beloniformes (Needle fishes) > Belonidae (Needlefishes)
Etymology: Tylosurus: Greek, tylos = callus + Greek, oura = tail (Ref. 45335).
More on author: Bleeker.

Issue
Considered mostly as a subspecies in the literature. Therefore the upraise at species rank here is considered as a provisionally accepted name, until more works are conducted on T. acus susbepcies to fix their status.

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

seewasser; süßwasser; brackwasser riff-verbunden; ozeanodrom (Ref. 51243); tiefenbereich 0 - 1 m (Ref. 58302). Tropical; 32°N - 28°S

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

Indo-Pacific: East Africa (Ref. 3130) to the central and south Pacific. Eastern Central Pacific: oceanic islands such as the Revillagigedo, Clipperton and Cocos (Ref. 9279).

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 100.0 cm TL Männchen/unbestimmt; (Ref. 9137); common length : 115 cm TL Männchen/unbestimmt; (Ref. 5450)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 24 - 27; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 22 - 24; Wirbelzahl: 90 - 95. Anterior part of dorsal fin with a low lobe, contained 10.5-13.3 times in body length; a distinct black lateral keel on caudal peduncle; caudal fin deeply forked. Juveniles have an elevated black lobe in the posterior part of the dorsal fin (Ref. 9682). Longer jaws with more numerous teeth and narrower caudal lobes than T. crocodilus (Ref. 37816).

Found in offshore and coastal waters. Feeds mainly on small fishes. Marketed mostly fresh. The flesh is of good quality (Ref. 9682). Oviparous (Ref. 205). Eggs may be found attached to objects in the water by tendrils on the egg's surface (Ref. 205).

Life cycle and mating behavior Maturities | Fortpflanzung | Spawnings | Egg(s) | Fecundities | Larven

Hauptreferenz Upload your references | Referenzen | Koordinator : Collette, Bruce B. | Partner

Collette, B.B., 1984. Belonidae. In W. Fischer and G. Bianchi (eds.) FAO species identification sheets for fishery purposes. Western Indian Ocean (Fishing Area 51), Volume 1. FAO, Rome. (Ref. 3130)

IUCN Rote Liste Status (Ref. 130435)

Nicht untersucht

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

Fischereien: kommerziell

FAO(Publication : search) | FishSource | Sea Around Us

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Estimates based on models

Preferred temperature (Ref. 115969): 28.2 - 29.3, mean 28.8 (based on 979 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00126 (0.00056 - 0.00281), b=3.11 (2.93 - 3.29), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.3 ±0.76 se; based on food items.

Widerstandsfähigkeit (Ref. 120179): mittel, Verdopplung der Population dauert 1,4 - 4,4 Jahre. (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): High vulnerability (60 of 100).

Preiskategorie (Ref. 80766): Medium.

Tylosurus melanotus (Bleeker, 1850)