ইলাসমোব্রাঙ্কি (হাঙ্গর এবং রে) (sharks and rays) >
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.
Environment: milieu / climate zone / গভীরতার পরিসীমা / distribution range
বাস্তুসংস্থান
সামুদ্রিক তলদেশ বিহারী; মহাসাগরে বিচরনক্ষম (Ref. 51243); গভীরতার পরিসীমা 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).
Length at first maturity / আকৃতি / ওজন / Age
পরিপক্কতা : Lm ?, range 39 - ? cm
Max length : 57.0 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 111281); সবের্াচ্চ প্রকাশিত ওজন : 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)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Human uses
মৎস্য: বাণিজ্যিক
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ইন্টারনেট সুত্র
Estimates based on models
Preferred temperature (সূত্র
123201): 9.8 - 26, mean 22 °C (based on 123 cells).
Phylogenetic diversity index (সূত্র
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).
ট্রফিক পর্যায়ে (সূত্র
69278): 3.4 ±0.5 se; based on diet studies.
স্থিতিস্থাপক (সূত্র
120179): নিম্ন/ , সর্বনিম্ন প্রজন দ্বিগুনের সময় ৪.৪-১৪ বৎসর (Fec = 40-150;).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (43 of 100).
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