Environment: milieu / climate zone / depth range / distribution range
पारिस्थितिकी
समुद्री; स्वच्छ जल, अलवण जल; खारा ड़िमरसल; औशिनोड़िरोमस (Ref. 51243); गहराई सीमा 25 - ? m (Ref. 114953). Subtropical; 35°N - 40°S, 120°W - 160°E (Ref. 114953)
Circumglobally in tropical and subtropical waters, entering estuaries and littoral lagoons and ascending river courses (Ref. 81284, 81624). Western Atlantic: Florida and Louisiana, USA to Brazil (Ref. 7251); eastern Atlantic: Portugal to Angola, including the western Mediterranean Sea (Ref. 4429; no report since the 19th century [Ref. 116564] ); western Pacific: northern Australia, from western Australia to Queensland (Ref. 7300); eastern Pacific: Gulf of California to Ecuador (Ref. 4429). In freshwater it can be found in rivers of West Africa (Ref. 81284), Ogowe River (Ref. 81284) and the Congo River estuary (Ref. 377, 81284).
Length at first maturity / आकार / वज़न / Age
Maturity: Lm 300.0, range 300 - 300 cm
Max length : 750 cm TL पुल्लिंग / अलिंग; (Ref. 57708); common length : 250 cm TL पुल्लिंग / अलिंग; (Ref. 4429); अधिकतम सूचित उम्र: 30 वर्षो (Ref. 57533)
Diagnosis: Rostral blade with 20 or fewer pairs of rostral spines (Ref. 81624).
A euryhaline species (Ref. 57533). Inhabits inshore coastal waters to moderate depth, also around off lying islands. Found also in estuaries, lagoons, river mouths, and even freshwater. Feeds on fishes and bottom-living animals. Ovoviviparous. Apparently can reproduce in freshwater (Ref. 57533). Freshwater populations occur to about 750 km up Amazon River; populations in Lake Nicaragua may be non-migratory (Ref. 7251). Reaches sexual maturity at 8-10 years and females have litters of approximately 1-13 pups. Young spend much of their early life in rivers up to 400 km from the sea (Ref. 114953).
Ovoviviparous, embryos feed solely on yolk (Ref. 50449).
Stehmann, M., 1990. Pristidae. p. 51-54. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4429)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
मात्स्यिकी: लघु वाणिज्य
अधिक जानकारी
संदर्भजलीयकृषिजलीयकृषि रूपरेखाखींचआनुवंशिकीElectrophoresesहैरेटिबिलटीबीमारीप्रक्रमणNutrientsMass conversion
साधन
Special reports
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इंटरनेट स्रोत
Estimates based on models
Preferred temperature (Ref.
123201): 20.1 - 29.1, mean 27.8 °C (based on 1796 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5234 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00198 - 0.01270), b=3.05 (2.83 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 4.0 ±0.60 se; based on food items.
लौटाव (Ref.
120179): निम्न, न्यूनतम जनसंख्या दुगनी होने का समय 4.5 - 14 वर्ष। (tmax=44; Fec=1-20;).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (79 of 100).
Nutrients (Ref.
124155): Calcium = 8.73 [1.69, 40.68] mg/100g; Iron = 0.523 [0.130, 1.505] mg/100g; Protein = 20.3 [18.1, 22.3] %; Omega3 = 0.173 [0.070, 0.432] g/100g; Selenium = 37 [10, 113] μg/100g; VitaminA = 2.11 [0.72, 6.06] μg/100g; Zinc = 0.367 [0.179, 0.703] mg/100g (wet weight);
