Пластиножаберные (акулы и скаты) (sharks and rays) >
Rhinopristiformes (Shovelnose rays) >
Rhinobatidae (Guitarfishes)
Etymology: omanensis: Named for its type locality, Oman.
Окружающая среда: среда / климатическая зона / пределы глубины / диапазон распространения
экология
морской донно-пелагический. Tropical; 27°N - 22°N, 56°E - 60°E (Ref. 114953)
Western Indian Ocean: Gulf of Oman.
Размер / Вес / Возраст
половая зрелость: Lm ?  range ? - ? cm
Max length : 60.0 cm TL самец/пол неопределен; (Ref. 114953)
Краткое описание
определительные ключи | морфология | морфометрия
This small species has a wedge-shaped disc, is moderately elongate and with a narrow, triangular snout; anterior nasal flaps extending well across internasal space and are barely separated; dorsal surface with dense pattern of white ocelli; disc is rather thin, its length 1.3-1.4 times its width; anterior margins undulate, moderately concave before snout tip; outer corner of pectoral fins broadly rounded; snout angle ca. 64°; large eye, much larger than spiracles, orbit length 3.1-3.7 in preorbital length, 1.1-1.4 in interorbital space; rostral ridges well separated at the base; spiracle with 2 fleshy folds, inner fold rudimentary; rather large nostrils, oblique, length 1.2-1.3 times internasal space, anterior nasal flaps barely separated; velvety skin, entirely covered with minute denticles, no thorns nor thornlets, some barely enlarged denticles on preorbit and in median row between nape and first dorsal fin; tail 1.3-1.4 times longer than disc; tall dorsal fins widely spaced, interspace 2.7-3.2 times base length of first dorsal fin; apices angular to narrowly rounded; pectoral fin radials 67-72; total vertebral centra 185-188 (Ref. 114953).
Body shape (shape guide): elongated; Cross section: flattened.
Apparently a benthic species on inner continental shelf. Unknown life history. Maturity size unknown but a male was found mature at 50 cm TL (Ref. 114953).
Жизненный цикл и брачное поведение
половая зрелость | размножение | нерест | икра | Плодовитость | личинки
Last, P.R., W.T. White, M.R. de Carvalho, B. Séret, M.F.W. Stehmann and G.J.P. Naylor, 2016. Rays of the world. CSIRO Publishing, Comstock Publishing Associates. i-ix + 1-790. (Ref. 114953)
Статус Красного Списка МСОП (Ref. 130435: Version 2025-2 (Global))
Угроза для людей
Harmless
Использование человеком
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Оценки, основанные на моделях
Индекс филогенетического разнообразия (ссылка 82804) |
PD50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00302 (0.00155 - 0.00589), b=3.13 (2.96 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Трофический уровень (ссылка 69278) |
3.5 ±0.5 se; based on size and trophs of closest relatives |
устойчивость к внешним воздействиям (ссылка 120179) |
низкий, минимальное время удвоения популяции 4.5-14 лет (Preliminary low fecundity). |
Уязвимость рыбной ловли (Ref. 59153) |
Low to moderate vulnerability (34 of 100). 🛈 |