";} } ?> Rhizoprionodon acutus, Milk shark : fisheries, gamefish

Rhizoprionodon acutus (Rüppell, 1837)

Milk shark
إضافة ملاحظاتك Fish Watcher
Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Rhizoprionodon acutus   AquaMaps   Data sources: GBIF OBIS
ارفع صور و مقاطع فيديو
Pictures | صور قوقل

التصنيف / Names الأسماء الشائعة | مرادفات | Catalog of Fishes(جنس, الانواع) | ITIS | CoL | WoRMS | Cloffa

أشلاق (القروش و الشفانين) (sharks and rays) > Carcharhiniformes (Ground sharks) > Carcharhinidae (Requiem sharks)
Etymology: Rhizoprionodon: rhiza (Gr.), root; prion (Gr.) saw; odon (Gr.), tooth, referring to teeth with serrated (saw-like) bases, or roots [replacement name for Rhizoprion Ogilby 1915, preoccupied by Rhizoprion Jourdan 1861 in mammals]. (See ETYFish);  acutus: Latin for sharp or pointed, probably referring to narrow, pointed snout. (See ETYFish).
More on author: Rüppell.

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

بحري; المياه العذبة; مياه مخلوطة قاعية التغذية و المعيشة; مهاجرة بين الياه الملحه و الحلوة لكن ليس للتزاوج (Ref. 51243); نطاق العمق 1 - 200 m (Ref. 244). Tropical; 41°N - 30°S, 27°W - 156°E

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

Eastern Atlantic: Mauritania to Angola; reported from the Gulf of Taranto (Ref. 231). Indo-West Pacific: Persian Gulf (Ref. 68964), Red Sea and East Africa to Indonesia, north to Japan, south to Australia.

Length at first maturity / الحجم / وزن / العمر

Maturity: Lm 75.0, range 70 - 80 cm
Max length : 175 cm TL ذكر/ مختلط الجنس; (Ref. 12693); 80.8 cm TL (female); common length : 110 cm TL ذكر/ مختلط الجنس; (Ref. 47737); أعلا وزن تم نشرة: 5.0 kg (Ref. 40637); العمر: 8 سنين (Ref. 244)

وصف مختصر الوصف الخارجي | قياسات المظهر الخارجي

الأشواك الظهرية (المجموع): 0; الأشعة الظهرية الناعمة (المجموع): 0; شوكة شرجية 0; أشعه شرجية لينه: 0. A small shark with a long, narrow, snout, big eyes without notches, long labial furrows, and oblique-cusped teeth which may be smooth-edged or weakly serrated; 2nd dorsal fin small, low and behind larger anal fin; no interdorsal ridge (Ref. 5578). Grey or grey-brown above, white below (Ref. 5578). Dorsal and anal fins with dusky or blackish edges, fins slightly darker than back (Ref. 9997).

أحياء     المصطلحات (على سبيل المثال epibenthic)

Found on continental shelves, often on sandy beaches and rarely in estuaries (Ref. 244). Reported to enter freshwater and recorded several times from Cambodia as far upstream as the Great Lake (Ref. 12693). Occurs near the surface in shallow waters (Ref. 12693). Feeds mainly on small pelagic and benthic bony fishes, also cephalopods and other invertebrates (Ref. 244). Viviparous (Ref. 50449). Utilized fresh and possibly dried salted for human consumption and for fishmeal (Ref. 9997). The 178 cm specimen recorded off Africa is possibly based on some other species (Ref. 9997).

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

Distinct pairing with embrace (Ref. 205). Viviparous, with a yolk-sac placenta; 2 to 8 in a litter (Ref. 9997), usually 2 to 5 after a gestation period of ~ 12 months; no seasonality in the reproductive cycle (Ref.58048). Size at birth between 25 and 39 cm.

المرجع الرئيسي Upload your references | مراجع | المنظم : Compagno, Leonard J.V. | المتعاونين

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)


Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر للأنسان

  Harmless (Ref. 244)

استخدامات بشرية

مصائد: تجاري; لعبة سمكه: نعم
FAO - Publication: search | FishSource | البحر حولنا

مزيد من المعلومات

الأسماء الشائعة
علم السميات البيئية
وضع البيض
تجمعات وضع البيض
تطور البيضة
الأستزراع المائي
ملف الأستزراع المائي
تواتر الأليل
Mass conversion
Stamps, Coins Misc.
التسمم باكل السمك
نوع السباحة
منطقة الخياشيم
عظمة الأذن


تقارير خاصة

Download XML

مصادر علي الأنترنت

Estimates based on models

Preferred temperature (Ref. 123201): 19.6 - 28.5, mean 26.9 °C (based on 1463 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00347 (0.00279 - 0.00431), b=3.06 (3.02 - 3.10), in cm total length, based on LWR estimates for this species (Ref. 93245).
مستوى غذائي (Ref. 69278):  4.3   ±0.4 se; based on diet studies.
Generation time: 5.5 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
المرونه (Ref. 120179):  منخفظ جدا, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أكثر من 14 سنة (K=0.2-0.6; Fec=1).
Fishing Vulnerability (Ref. 59153):  High vulnerability (61 of 100).
فئة السعر (Ref. 80766):   Medium.
Nutrients (Ref. 124155):  Calcium = 38.8 [4.6, 150.8] mg/100g ; Iron = 0.754 [0.209, 2.436] mg/100g ; Protein = 20 [17, 22] % ; Omega3 = 0.385 [0.140, 0.985] g/100g ; Selenium = 54.1 [10.0, 164.5] μg/100g ; VitaminA = 28.2 [9.5, 87.4] μg/100g ; Zinc = 0.76 [0.35, 1.67] mg/100g (wet weight);