ইলাসমোব্রাঙ্কি (হাঙ্গর এবং রে) (sharks and rays) >
Rhinopristiformes (Shovelnose rays) >
Rhinobatidae (Guitarfishes)
Etymology: Rhinobatos: Greek, rhinos = nose + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335); sainsburyi: Named for Dr. Keith Sainsbury.
Eponymy: Dr Keith John Sainsbury (d: 1952) is a marine ecologist and mathematical modeler with a research focus on the assessment, ecology, economics, exploitation and conservation of marine resources and ecosystems. [...] (Ref. 128868), visit book page.
More on author: Last.
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
সামুদ্রিক সমুদতলে ভাসমান বেনথোপেলাজিক; গভীরতার পরিসীমা 66 - 200 m (Ref. 58070), usually ? - 150 m (Ref. 58070). Tropical; 5°S - 21°S, 114°E - 135°E (Ref. 114953)
Eastern Indian Ocean and Western Central Pacific: Western Australia to Papua New Guinea
আকৃতি / ওজন / Age
Maturity: Lm ? range ? - ? cm
Max length : 59.5 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 58070)
Short description
সনাক্তকারী নির্দেশক | বহিঃ অঙ্গ সংস্থান | মরফোমেট্রিক্স
This species is distinguished by the following characters: wedge-shaped disc, its dorsal surface scaled but no thorns; snout length 2.5-2.6 times interspiracular distance; orbit moderately large, diameter 1.6-1.9 times spiracle length; nostrils oblique, length 1.4-1.6 times internarial distance; anterior nasal-flaps inserted well into internarial space, but never almost united near ventral midline; posterior nasal flaps broad; ridges of rostral cartilage well-separated dorsally and almost parallel; prebranchial sensory-pore patch narrow, extending to first gill slit; distance between first gill slits 1.3-1.4 times distance between fifth gill slits; distance between fifth gill slits 2.5-2.9 times in ventral head length; postscapular sensory canal long, not grooved, extending more than three-quarters distance to pectoral-fin insertions; moderately tall dorsal-fins; pelvic-fin inner margin distinctly longer than its base in mature males, shorter than base in females; interdorsal distance more than 2.5 times first dorsal-fin base; outer spiracular fold distinctly larger than inner fold; dorsal margin of caudal fin about 2.0-2.2 times preventral margin; 162-171 post-synarcual vertebral centra; about 50 nasal lamellae; dorsal disc plain brownish or with faint dusky blotches or fine dark spots (Ref. 58070).
This species is mostly collected at depths shallower than 150 m. Male individuals mature at 46 cm TL, immature at 37.6 cm TL (Ref. 58070).
Life cycle and mating behavior
পরিপক্কতা | প্রজনন | ডিম ছাড়া | ডিমসমূহ | ডিম্বধারন ক্ষমতা | শুককীট
Last, P.R., 2004. Rhinobatos sainsburyi n. sp. and Aptychotrema timorensis n. sp. -- two new shovelnose rays (Batoidea: Rhinobatidae) from the eastern Indian Ocean. Rec. Aust. Mus. 56(2):201-208. (Ref. 58070)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
হাতিয়ার
Special reports
Download XML
ইন্টারনেট সুত্র
Estimates based on models
Preferred temperature (Ref.
123201): 20.5 - 26.8, mean 23.9 °C (based on 45 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00295 (0.00151 - 0.00578), b=3.13 (2.96 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 3.7 ±0.4 se; based on size and trophs of closest relatives
স্থিতিস্থাপক (Ref.
120179): নিম্ন/ , সর্বনিম্ন প্রজন দ্বিগুনের সময় ৪.৪-১৪ বৎসর (Preliminary low fecundity).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (44 of 100).
