Brevitrygon heterura, Dwarf whipray

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Brevitrygon heterura (Bleeker, 1852)

Dwarf whipray
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分類 / Names 俗名 | 同種異名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鰓亞綱 (鯊魚與魟魚) (sharks and rays) > Myliobatiformes (Stingrays) 鰩目 (Stingrays) > Dasyatidae (Stingrays) 土魟科 (Stingrays) > Urogymninae
Etymology:

Environment: milieu / climate zone / depth range / distribution range 生態學

海洋 居於水底的; 深度上下限 ? - 50 m (Ref. 114953).

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Indo-West Pacific (Indo-Malay Archipelago): western Thailand to Indonesia (Java and Borneo).

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 24.0 cm WD 雄魚/尚未辨別雌雄; (Ref. 114953)

簡短描述 型態特徵 | 形態測量圖

This species is distinguished by the following characters: a very small whipray, oval disc, pointed snout, adults with broad almost rectangular denticle band, no enlarged mid-shoulder denticles, tail short (with bulbous tip in adult females) with median row of enlarged spearshaped thorns, skin folds on tail absent, and dorsal surface plain coloured; disc slightly longer than wide, length ca. 1–1.1 times DW, pectoral-fin apex is broadly rounded; snout rather long, broad, with apical lobe narrowly rounded, anterior margins moderately concave; eyes small, protruding slightly, orbit length and spiracle ca. 2.9–3.1 in snout length, the interorbital space rather broad, 1.2–2.1 times orbit length; mouth is moderately arched, 2-3 well-developed oral papillae (well separated), lower jaw arched with central concavity; nasal curtain is skirtshaped, broad, posterior margin finely fringed; mid-shoulder denticle is weak, the denticle band expanded over abdomen in adults, converging forward of orbits and tail, and constricted beside spiracles, skin is smooth outside denticle band; thorns in median row on tail 4-6 and enlarged with convex crowns; tail short to moderately elongate, its length 1–1.7 times DW, depressed, stout at base but filamentous beyond caudal sting in young and adult males while bulbous with short filamentous tip in large females, with 1 or 2 caudal stings (Ref. 114953).

生物學特性     字彙 (例如 epibenthic)


Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚


主要參考資料 Upload your references | 參考文獻 | 合作者 : McEachran, John | 合作者

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)

IUCN 瀕危狀態 (Ref. 130435)

  次級保育類動物, 見 IUCN 紅皮書 (VU) (A2d); Date assessed: 12 May 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

 





人類使用

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生態毒物學
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孕卵數

卵發育
年龄/大小
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仔魚
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網路資源

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | 檢查 FishWatcher | CISTI | Catalog of Fishes: , | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: 基因組, 核甘 | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | 樹狀分類階層 | Wikipedia: , 搜尋 | World Records Freshwater Fishing | 動物學的記錄

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01622 (0.00606 - 0.04338), b=3.00 (2.77 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.5   ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100).