Taxonomic Remarks
Spelling following ECoF.
Môi trường: môi trường / vùng khí hậu / Mức độ sâu / phạm vi phân phối
Sinh thái học
biển cùng sống ở rạn san hô; mức độ sâu 3 - 90 m (Ref. 30573). Tropical; 42°N - 34°S, 30°E - 170°E (Ref. 114953)
Indo-West Pacific, from South Africa (Natal coast), Mozambique, East Africa, Seychelles, the Red Sea, Arabia, Oman, the Persian Gulf, India, Sri Lanka, Malaysia, Indonesia (Borneo), Philippines, New Guinea, Thailand, Viet Nam, China, Taiwan Province of China, Korea, Japan, and Australia.
Chiều dài lúc trưởng thành đầu tiên / Bộ gần gũi / Khối lượng (Trọng lượng) / Tuổi
Chín muồi sinh dục: Lm 164.0, range 150 - 178 cm
Max length : 300 cm TL con đực/không giới tính; (Ref. 58784); Khối lượng cực đại được công bố: 135.0 kg (Ref. 9987)
An unmistakable guitarfish with a broad, rounded snout, large, high pectoral fins, and heavy ridges of spiky thorns over the eyes and on the back and shoulders; jaws with heavily ridged, crushing teeth in undulating rows (Ref. 5578). Grey or brownish above (Ref. 5578), white below; numerous white spots dorsally on fins, body and tail; black spots on head and shoulders but no eyespots or ocelli (Ref. 3919).
Body shape (shape guide): elongated.
Inhabits coastal areas and offshore coral reefs, close inshore (Ref. 9915). Found on sand and mud bottoms (Ref. 12951). Sometimes found in the water column (Ref. 12951). Feeds on demersal bony fishes (e.g. croakers), crustaceans (crabs, prawns), bivalves, and cephalopods (Ref. 9915, 114953). Ovoviviparous (Ref. 50449). Produces litters of 2-11 pups (Ref. 114953). A row of large spines present above the eye, on the center of the nape, and on the shoulder have a defensive function (can be used for butting). Caught commonly by demersal tangle net, and occasionally trawl and longline fisheries (Ref.58048). Considered as to be a problem in trawls because it is very rough and spiky, difficult to handle and can be hazardous, thus they create a nuisance to trawl fishers as they are difficult to remove and their roughness can damage smaller species in the catch (Ref. 9915, 93660). Utilized fresh and dried-salted; the pectoral fins are the only part which is eaten (Ref. 9987).
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). With 4 in a litter (Ref. 12951). Size at birth 45 cm (Ref. 12951).
Compagno, L.J.V. and P.R. Last, 1999. Rhinidae (=Rhynchobatidae). Wedgefishes. p. 1418-1422. In K.E. Carpenter and V. Niem (eds.) FAO identification guide for fishery purposes. The Living Marine Resources of the Western Central Pacific. FAO, Rome. (Ref. 9915)
Tình trạng Sách đỏ IUCN (Ref. 130435: Version 2025-2 (Global))
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Chỉ số đa dạng phát sinh loài (Tài liệu tham khảo 82804) |
PD50 = 1.0005 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00363 (0.00162 - 0.00814), b=3.11 (2.90 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Mức dinh dưỡng (Tài liệu tham khảo 69278) |
3.6 ±0.50 se; based on food items. |
Thích nghi nhanh (Tài liệu tham khảo 120179) |
Rất thấp, thời gian nhân đôi của chủng quần tối thiểu là hơn 14 năm (Fec=4). |
Sự dễ bị tổn thương của nghề đánh cá (Ref. 59153) |
Very high vulnerability (76 of 100). 🛈 |
Loại giá (Ref. 80766) |
Medium.
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Chất dinh dưỡng (Ref. 124155) |
Calcium = 6.66 [1.37, 27.05] mg/100g; Iron = 0.311 [0.072, 0.881] mg/100g; Protein = 19.5 [17.3, 21.6] %; Omega3 = 0.0694 [, ] g/100g; Selenium = 45.3 [13.9, 139.1] μg/100g; VitaminA = 26.1 [8.3, 82.9] μg/100g; Zinc = 0.722 [0.351, 1.434] mg/100g (wet weight); |