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Rajiformes (Skates and rays) >
Rajidae (Skates)
Eponymy: The original description has no etymology, but the binomial is not an eponym: it is derived from the Japanese name for the skate, which is keno-ei. (See Zuge for a similar case). (Ref. 128868), visit book page.
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع
بوم شناسي
دريايي نزديك كف زي; اقیانوس رو (Ref. 51243); تغييرات عمق 20 - 230 m (Ref. 106604). Temperate
Northwest Pacific: Japan, Korea and Taiwan (Ref. 8630). Appears to be confined to the continental shelf off Japan and in the China Seas south to about Xiamen (Ref. 47737).
طول در اولین بلوغ / اندازه / وزن / سن
بلوغ: Lm ?, range 39 - ? cm
Max length : 57.0 cm TL جنس نر / بدون خواص جنسي; (Ref. 111281); بيشينه وزن گزارش شده: 815.70 g (Ref. 125279)
Bottom-dweller that feeds on invertebrates and bony fish. Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 4.8-6.6 cm long and 2.9-3.7 cm wide (Ref. 41249, 41253, 41298). Depth range given by H. Ishihara (pers.comm. 07/07).
Oviparous, paired eggs are laid mainly at night (Ref. 44760). Batches of eggs are laid in three to six-day interval on sand bottom. Embryos feed solely on yolk (Ref. 50449). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205).
McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2025-2)
استفاده انسانی
ماهي گيري – شيلات: تجاري
ابزارها
گزارش های ويژه
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منابع اينترنتي
تخمینها بر اساس مدلها
دمای ترجیحی (مرجع
123201): 9.8 - 26, mean 22 °C (based on 123 cells).
شاخص تنوع فیلوژنتیکی (مرجع
82804): PD
50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00173 - 0.00459), b=3.23 (3.09 - 3.37), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
سطح تروفیک (مرجع
69278): 3.4 ±0.5 se; based on diet studies.
جهندگی (مرجع
120179): پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (Fec = 40-150;).
آسیبپذیری ماهیگیری (Ref.
59153): Moderate vulnerability (43 of 100).
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