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Carangaria/misc (Various families in series Carangaria) >
Polynemidae (Threadfins)
Etymology: Polydactylus: Greek, poly = a lot of + greek, daktylos = finger (Ref. 45335).
More on authors: Lay & Bennett.
Environment: milieu / climate zone / نطاق العمق / distribution range
البيئة
بحري; مياه مخلوطة القاع; نطاق العمق 10 - 60 m (Ref. 91172). Subtropical; 37°N - 12°S, 122°W - 77°W (Ref. 57343)
Eastern Pacific: Monterey Bay, California, USA to Callao, Peru. One record from the Galapagos Islands. Rare north of Baja California, Mexico (Ref. 2850). Record from Chile (Ref. 9068) needs to be verified (Ref. 57343).
الحجم / وزن / العمر
النضج: Lm ? range ? - ? cm
Max length : 36.8 cm TL ذكر/ مختلط الجنس; (Ref. 115882); common length : 20.0 cm TL ذكر/ مختلط الجنس; (Ref. 55763)
الأشواك الظهرية (المجموع) : 9; الأشعة الظهرية الناعمة (المجموع) : 11 - 13; شوكة شرجية: 3; أشعه شرجية لينه: 13 - 15; فقرات: 24. Body grayish, no stripes or spots. Lip on lower jaw well developed. Dentary teeth restricted to dorsal surface. Maxilla not covered with scales. Pectoral filaments 6; longest not reaching beyond level of posterior end of anal fin base. Lateral line bifurcated on caudal fin membranes, extending to posterior margins of upper and lower caudal fin lobes. Swim bladder present (Ref. 45049).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Found in shallow water near the coast, on sand and mud bottoms (Ref. 9332). Larvae and small juveniles (>4 cm) are pelagic and sometimes occur several hundred kilometers offshore, whereas the larger juveniles and adults prefer shallow near-shore waters like bays, sloughs or estuaries where the bottom is sandy or muddy (Ref. 28023). Omnivorous, feeds on worms, sand crabs, shrimp, clams; sometimes feeds on fish like small anchovy (Ref. 28023). Esteemed food fish where it occurs (Ref. 57343). Also Ref. 55763.
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
Motomura, H., 2004. Threadfins of the world (Family Polynemidae). An annotated and illustrated catalogue of polynemid species known to date. FAO Spec. Cat. Fish. Purp. Rome: FAO. 3:117 p. (Ref. 57343)
IUCN Red List Status (Ref. 130435: Version 2025-1)
استخدامات بشرية
مصائد: تجاري
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (مرجع
123201): 20.5 - 29, mean 25.9 °C (based on 273 cells).
Phylogenetic diversity index (مرجع
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00646 (0.00431 - 0.00968), b=3.06 (2.94 - 3.18), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
مستوى غذائي (مرجع
69278): 3.6 ±0.6 se; based on diet studies.
المرونه (مرجع
120179): عالي, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أقل من 15 شهر (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (27 of 100).
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Nutrients (Ref.
124155): Calcium = 101 [51, 203] mg/100g; Iron = 1.13 [0.58, 2.10] mg/100g; Protein = 20.2 [18.6, 21.8] %; Omega3 = 0.402 [0.275, 0.617] g/100g; Selenium = 24.2 [12.8, 48.0] μg/100g; VitaminA = 9.48 [3.93, 22.61] μg/100g; Zinc = 0.904 [0.619, 1.327] mg/100g (wet weight);
