Classification / Names
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Carangaria/misc (Various families in series Carangaria) >
Polynemidae (Threadfins)
Etymology: Polynemus: Greek, poly = a lot of + Greek,nema = filament (Ref. 45335); bidentatus: Name from Latin 'bis' meaning two and 'dentatus' for toothed, in allusion to the 2 tooth patches on the vomer..
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
; স্বাদু পানি ভাসমান. Tropical
Asia: Mekong basin, Viet Nam.
আকৃতি / ওজন / Age
Maturity: Lm ? range ? - ? cm
Max length : 15.3 cm SL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 58087)
Short description
সনাক্তকারী নির্দেশক | বহিঃ অঙ্গ সংস্থান | মরফোমেট্রিক্স
পৃষ্ঠীয় কাঁটা (মোট ) : 9; পৃষ্ঠীয় নরম পাখনা দন্ড (মোট ) : 16; পায়ূ কাঁটা : 3. This species is distinguished by the following characters: D1 VIII; D2 I, 16; pectoral-fin filaments 7 (6th filament longest); pectoral -fin rays 17; anal-fin spines 3; pored lateral-line scales 70; gill rakers 32; vomerine teeth separated at midline, forming two toothed patches; swimbladder absent; depth at posterior margin of maxilla greater than orbit diameter; relatively long snout length (6.8% of SL), upper-jaw length (13.8% of SL), first pelvic-fin soft ray length (17.2% of SL), and upper caudal-fin lobe length (38.1% of SL); relatively short pectoral-fin length (32.6% of SL), longest pectoral-fin filament length (158.7% of SL), and third anal-fin soft ray length (15.8% of SL); relatively small orbit diameter (2.2% of SL); ventroposterior part of the pectoral fin black (Ref. 58087).
Life cycle and mating behavior
Maturities | প্রজনন | Spawnings | Egg(s) | Fecundities | শুককীট
Motomura, H. and S. Tsukawaki, 2006. New species of the threadfin genus Polynemus (Teleostei: Polynemidae) from the Mekong River Basin, Vietnam, with comments on the Mekong species of Polynemus. Raffles Bull. Zool. 54(2):459-464. (Ref. 58087)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
হাতিয়ার
Special reports
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ইন্টারনেট সুত্র
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5039 [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).
ট্রফিক পর্যায়ে (Ref.
69278): 3.6 ±0.5 se; based on size and trophs of closest relatives
স্থিতিস্থাপক (Ref.
120179): উচ্চ, সর্বনিম্ন প্রজন দ্বিগুনের সময় ১৫ মাস (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
