Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina; sötvatten; brackvatten bottenlevande; djupintervall 0 - 100 m (Ref. 6871). Tropical; 28°N - 32°S, 76°E - 165°E (Ref. 114953)
Indo-West Pacific: Thailand to New Guinea and the Solomon Islands, south to Australia. Records from the south coast of India, Sri Lanka, Bangladesh, and Myanmar need confirmation.
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm 165.0, range 150 - 180 cm
Max length : 270 cm TL hane/ej könsbestämd; (Ref. 9909)
Occurs inshore and offshore, from the intertidal to offshore continental and insular shelves (Ref. 9909). Young individuals are found inshore on sand flats, around atolls, and in mangrove swamps, estuaries and coastal lagoons (Ref. 6871). Adults occur inshore, over continental shelf, to ~100 m deep, and also the only rhinobatid reportedly able to live and breed in freshwater (Ref. 6871, 127960). Feeds on shellfish, mainly on crustaceans, prawns and crabs (Ref. 9909, Ref. 114953) and also small bony fishes (Ref. 127960). Ovoviviparous (Ref. 50449). Maturity size at 150-180 cm TL; born at 38-40 cm TL (Ref. 114953). Probably the major commercial guitarfish in the Western Central Pacific (Ref. 9909). Caught regularly by demersal tangle net fisheries operating throughout the area. Utilized for its meat, fins (both very high value), skin and cartilage (Ref. 58048). Reported to attain a maximum length of 4 m (Ref. 58784).
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). Born at 38-40 cm TL (Ref.58048).
Last, P.R. and J.D. Stevens, 1994. Sharks and rays of Australia. CSIRO, Australia. 513 p. (Ref. 6871)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Mänskliga användningsområden
Fiskeri: mindre kommeriell; Akvarium: Kommersiell
Verktyg
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref. 82804) |
PD50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00389 (0.00140 - 0.01084), b=3.05 (2.82 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
3.6 ±0.50 se; based on food items. |
Resiliens (Ref. 120179) |
Låg, lägsta populationsfördubblingstid 4,5-14 år (Fec assumed to be <100). |
Sårbarhet i fisket (Ref. 59153) |
High vulnerability (61 of 100). 🛈 |
Priskategori (Ref. 80766) |
Low.
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