Polypterus senegalus, Gray bichir : fisheries

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Polypterus senegalus Cuvier, 1829

Gray bichir
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Image of Polypterus senegalus (Gray bichir)
Polypterus senegalus
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التصنيف / Names الأسماء الشائعة | مرادفات | Catalog of Fishes(جنس, الانواع) | ITIS | CoL | WoRMS | Cloffa

> Polypteriformes (Bichirs) > Polypteridae (Bichirs)
Etymology: Polypterus: Greek, poly = a lot of + Greek, pteron = wing, fin (Ref. 45335);  senegalus: Named after M. d'Arnaud, collector of the two specimens (Ref. 1688).  More on author: Cuvier.

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

; المياه العذبة القاع; pH range: 6.0 - 8.0; dH range: 5 - 19; سمكة نهرية (Ref. 51243).   Tropical; 25°C - 28°C (Ref. 2060); 16°N - 2°S, 17°W - 37°E

التوزيع دول | مناطق الفاو | النظام البيئي | الظهور | Point map | مقدمة | Faunafri

Africa: subspecies Polypterus senegalus senegalus known from West Africa, in Senegal, Gambia, Niger, Volta and Chad basins (Ref. 2835, 3188, 81263), up to Nile River basin (Ref. 2835, 3188) and lakes Turkana (Ref. 3188) and Albert (Ref. 41590, 48922, 48960); subspecies Polypterus senegalus meridionalis known from middle and upper Congo River basin (Ref. 2835, 3188, 4910, 45434).

Length at first maturity / الحجم / وزن / العمر

Maturity: Lm ?, range 15 - 23 cm
Max length : 70.0 cm SL ذكر/ مختلط الجنس; (Ref. 3188); أعلا وزن تم نشرة: 207.00 g (Ref. 3013)

وصف مختصر الوصف الخارجي | قياسات المظهر الخارجي

الأشواك الظهرية (المجموع): 8 - 11; شوكة شرجية 14-17; فقرات: 53 - 59. Diagnosis: Polypterus senegalus is characterized by jaws of equal length or an upper jaw slightly longer than lower jaw and a pectoral fin not reaching the first dorsal ray (Ref. 2756, 2835, 42908, 43035, 81263).

أحياء     المصطلحات (على سبيل المثال epibenthic)

This species inhabits marginal swamps and freshwater lagoons (Ref. 3066) and it appears to favor sheltered inshore habitats (Ref. 3034); it inhabits the muddy regions at the sides of rivers and swampy waters, where it lies quiet or glides about with snake-like movements (Ref. 49805). During the hottest hours of the day, it comes to the surface just on the outer edge of the vegetation, and it goes back to the bottom when disturbed (Ref. 45962). It feeds on insects, crustaceans, mollusks, frogs and fishes (Ref. 4903, Ref. 28714). Polypterus senegalus senegalus is mainly insectivorous (Ref. 367). Longevity of Polypterus senegalus in captivity can be 34 years and more (Ref. 48954). Larval fish 1.1-3.8 cm SL were found in papyrus root mat and juveniles up to 10 cm SL retaining external gills were found in fringing water hyacinth. Feeds mainly on fishes (Ref. 9695), insects, crustaceans, mollusks, frogs as well as on plant fragments and seeds.

Life cycle and mating behavior النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae

In Polypterus senegalus courtship starts with a series of leaps from the surface by usually only one of the pair at a time, followed by a slow descent through the water. After a while the male stays very close to the female and at times the female will remain motionless in the water and the male will come up to her from behind and nudge her with sidewise movements of his head. The enlarged and swollen anal fin of the male is folded in a cup-like fashion and is used to brush the female (Ref. 42791). No nest is constructed, but the eggs are laid a few at a time throughout the thick vegetation (Ref. 42791). The larvae, which move about with the male parent in a dense school, are provided with accessory gills and appear very salamander-like (Ref. 42791).

المرجع الرئيسي Upload your references | مراجع | المنظم | المتعاونين

Gosse, J.P. and J. Daget, 2003. Polypteridae. p. 101-112. In D. Paugy, C. Lévêque and G.G Teugels (eds.) The fresh and brackish water fishes of West Africa Volume 1. Coll. faune et flore tropicales 40. Institut de recherche de développement, Paris, France, Muséum national d'histoire naturelle, Paris, France and Musée royal de l'Afrique Central, Tervuren, Belgium, 457p. (Ref. 81263)

IUCN Red List Status (Ref. 123251)

  Least Concern (LC) ; Date assessed: 07 June 2019

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر للأنسان

  Harmless





استخدامات بشرية

مصائد: تجاري
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الخصوبة
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تطور البيضة
مراجع
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ملف الأستزراع المائي
سلالات
جيني
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Nutrients
Mass conversion
المتعاونين
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مصادر علي الأنترنت

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5002   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00407 (0.00242 - 0.00685), b=2.99 (2.84 - 3.14), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
مستوى غذائي (Ref. 69278):  3.5   ±0.2 se; based on diet studies.
المرونه (Ref. 120179):  منخفظ جدا, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أكثر من 14 سنة (tmax=34; Fec < 1,000).
عرضة للخطر (Ref. 59153):  Moderate to high vulnerability (50 of 100) .
فئة السعر (Ref. 80766):   Unknown.
Nutrients (Ref. 124155):  Calcium = 171 [107, 300] mg/100g ; Iron = 1.3 [0.9, 2.0] mg/100g ; Protein = 17.6 [16.6, 18.7] % ; Omega3 = 0.227 [0.107, 0.502] g/100g ; Selenium = 95.7 [43.0, 235.0] μg/100g ; VitaminA = 12.7 [5.7, 26.2] μg/100g ; Zinc = 1.47 [1.09, 1.99] mg/100g (wet weight);