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Eleutheronema tetradactylum (Shaw, 1804)

Fourfinger threadfin
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Native range
This map was computer-generated and has not yet been reviewed.
Eleutheronema tetradactylum   AquaMaps   Data sources: GBIF OBIS
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Image of Eleutheronema tetradactylum (Fourfinger threadfin)
Eleutheronema tetradactylum
Picture by Randall, J.E.

رده بندی / Names اسامي عام | مترادف | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

ماهبان شعاع باله > Perciformes (Perch-likes) > Polynemidae (Threadfins)
Etymology: Eleutheronema: Greek, eleutheros = free + Greek, nema = filament (Ref. 45335).  More on author: Shaw.

Environment: milieu / climate zone / depth range / distribution range بوم شناسي

; دريايي; آب شيرين; لب شور; هردو رو (Ref. 51243); تغييرات عمق 0 - 23 m (Ref. 6390).   Tropical; 32°N - 26°S, 47°E - 154°E (Ref. 57343)

پراكنش كشورها | مناطق سازمان خوار و بار جهاني (FAO) | Ecosystems | ظهور | Point map | معرفي | Faunafri

Indo-West Pacific: Persian Gulf to Papua New Guinea and northern Australia. Replaced by Eleutheronema rhadinum (Jordan & Evermann, 1902), in East Asia (Japan, China, Viet Nam).

Length at first maturity / Size / Weight / سن

Maturity: Lm ?, range 29 - ? cm
Max length : 200 cm TL جنس نر / بدون خواص جنسي; (Ref. 3479); common length : 50.0 cm TL جنس نر / بدون خواص جنسي; (Ref. 3479); بيشينه وزن گزارش شده: 145.0 kg (Ref. 4965)

توصيف مختصر ريخت شناسي | ريخت ستجي بوسيله انداره گيري

خارهاي باله پشتي (کل): 9; شعاع نرم باله پشتي (کل): 13-15; خارهاي باله مخرجي 3; شعاع نرم باله مخرجي: 14 - 16; مهره ها: 25. This species is distinguished with the following characters: second dorsal fin soft rays 14 (rarely 13 or 15) pectoral fin rays 16-18 (mode 17, rarely 15 or 19), pectoral filaments 4; pored lateral line scales 71-80 (mode 73); scale rows above lateral line 9-12, below 13-15 (14); vomer with deciduous tooth plates on both sides, except in juveniles (< ca. 7.0 cm SL); posterior part of maxilla deep, 3-4% of SL; short tooth plate extension onto lateral surface of lower jaw, 7-9% SL. Colour of upper sides of head and trunk with slight darkish silver tinge, becoming lighter in lower sides; anterior margins of first and second dorsal fins blackish, remaining parts translucent and slightly blackish, respectively; pectoral fin membranes vivid yellow in life, except in large specimens > ca 35 cm SL which is dusky yellow; pectoral filaments white; anterior margin of pelvic fin yellow and other parts white; base of caudal fin yellowish, other parts blackish (Ref. 41639, 57343).

زيست شناسي     واژه نامه (بعنوان مثال epibenthic)

Adults occur mainly over shallow muddy bottoms in coastal waters. Also enter rivers (Ref. 3479, 6390, 11230). Juveniles found in estuaries. During winter, adults ascend the rivers. They usually form loose schools, although larger fish are more often observed in pairs or singly (Ref. 6390). Feed on prawns and fish (largely members of Mugilidae, Engraulidae, and Sciaenidae) with occasional polychaetes. Frequency of crustaceans to fish in the diet varies seasonally. Larvae (7-30 mm TL) feed mainly on copepods and mysids but also take shrimps and prawn larvae (Ref. 57343). Juveniles (31-60 TL) feed on prawns shrimps and mysids (Ref. 57343). Protandrous hermaphrodites. Marketed fresh, frozen, and dried or salted.

Life cycle and mating behavior بلوغ | تولید مثل | تخم ریزی | تخم ها | Fecundity | توزاد ( لارو)

In Australia, fish are males at 24-47 cm FL, hermaphrodites at 25-46 cm FL and females at 28-72 cm FL. On the northeast Queensland coast, most blue threadfin are females by 45-50 cm FL. Hermaphroditic blue threadfin develop fom 1-2-year-old fish, and females first appear as 2-3-year-old individuals (Ref. 28736). Male fish probably commence sex reversal immediately after spawning (ie about April-May) and this condition may persist until after the next spawning period (Ref. 28736). The progression from hermaphrodites to females is complete by the following season. There is little information on the larvae, although nursery areas are known to be lower estuaries, tidal swamps and lagoons, and shallows along the foreshores (Williams 1997).

مآخذ اصلی Upload your references | مراجع | هماهنگ كننده | همكاران

Motomura, H., Y. Iwatsuki, S. Kimura and T. Yoshino, 2002. Revision of the Indo-West Pacific polynemid fish genus Eleutheronema (Teleostei: Perciformes). Ichthyol. Res. 49(1):47-61. (Ref. 41639)

وضعيت در فهرست قرمز IUCN (Ref. 120744)


CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر برای انسان ها

  Harmless





استفاده انسانی

ماهي گيري – شيلات: با ارزش تجاري بالا; آبزي پروري: تجاري
FAO(آبزي پروري: production; ماهي گيري – شيلات: production; publication : search) | FishSource | Sea Around Us

اطلاعات بيشتر

اسامي عام
مترادف
سوخت و ساز
شکارچیان
سم شناسي بوم زيستي
تولید مثل
بلوغ
تخم ریزی
Spawning aggregation
Fecundity
تخم ها
نمو تخم
مراجع
آبزي پروري
نمايه آبزي پروري
نژادها
ژنتيك
تواتر آلل ها
وارث
بيماري ها
فرآوری
Mass conversion
همكاران
عکس ها
Stamps, Coins Misc.
صداها
سيگواترا
سرعت
نوع شناگری
منطقه آبششي
Otoliths
مغزها
بینایی

ابزارها

گزارش های ويژه

بارگيری XML

منابع اينترنتي

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 25.2 - 29.3, mean 28.6 (based on 2815 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00562 (0.00336 - 0.00941), b=3.09 (2.94 - 3.24), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic Level (Ref. 69278):  4.1   ±0.5 se; Based on diet studies.
جهندگی (Ref. 69278):  متوسط, كمينه زمان لازم براي دو برابر شدن جمعيت 4/1 – 4/4 سال (Fec=680,000; assuming tm>=2).
Prior r = 0.56, 95% CL = 0.37 - 0.84, Based on 2 stock assessments.
آسيب پذيری (Ref. 59153):  High to very high vulnerability (69 of 100) .
طبقه قيمت (Ref. 80766):   High.