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Rochia nilotica   (Linnaeus, 1767)

Commercial top
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Rochia nilotica

Chinese Taipei (Taiwan) country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: never/rarely | Ref:
Regulations: no regulations | Ref:
Uses: no uses
Comments:
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/tw.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Poutiers, J.M., 1998
National Database:

Common names from other countries

Commercial top shell, ... more

Classification / Names / Names 俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS

Gastropoda > Trochida () > Tegulidae () > Trochinae

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

; 深度上下限 0 - 20 m (Ref. 349).    ; 32°N - 25°S, 45°E - 171°E (Ref. 81851)

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | 簡介

Indo-Pacific: from Madagascar, Sri Lanka, Andaman and Nicobar Islands, to as far east as French Polynesia, north to southern Japan and Hawaii, and south to Australia.

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm Max length : 15.0 cm SHH 雄魚/尚未辨別雌雄; (Ref. 349); common length : 11.0 cm SHL 雄魚/尚未辨別雌雄; (Ref. 349)

簡短描述 型態特徵

Shell conical, large, thick and very heavy. Body whorl almost smooth, with concave sides above a protuding, acutely rounded and thickened periphery. Base shell flat. Aperture squarish. Colouration: shell off-white, with large irregular axial reddish stripes (Ref. 128042).

生物學特性     字彙 (例如 epibenthic)

It is the most economically important gastropod species in the tropical West Pacific. It is both an important traditional food and a leading export item used as a source of mother-of-pearl material for buttons and jewelry. Many small sized artisanal fisheries for meat and shell exist in other islands of the area. Due to severe and frequent overfishing, management policies are often adopted and aquaculture trials are under way (Ref. 349). Maximum depth from Ref. 799. Typically found in shallow, high energy portions of barrier and reefs (Refs. 349, 128042). Feeds on filamentous algae and generally avoids bottoms of sand and living corals. Population density generally decreasing in deeper areas, while the mean size of individuals increases (Ref. 349).

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

Breeding period is marked by spring tides with external fertilization and nocturnal spawning.

主要參考資料 參考文獻 | 合作者 | 合作者

Poutiers, J.M. 1998. (Ref. 349)

IUCN 瀕危狀態 (Ref. 130435)

  未評估 

CITES狀態 (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

 

人類使用

漁業: 商業性
FAO - 漁業: landings | FishSource | 周邊海洋

工具

E-book | 野外調查

網路資源

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(漁業: ; publication : search) | GenBank (基因組, 核甘) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | 樹狀分類階層 | Wikipedia (去, 搜尋) | 動物學的記錄

Estimates based on models

Preferred temperature (Ref. 115969): 26.3 - 29.3, mean 28.7 (based on 2725 cells).
回復力 (Ref. 69278) 中等的, 族群倍增時間最少 1.4 - 4.4年 (K=0.19-0.36).
瀕危性 (Ref. 71543): Low vulnerability (10 of 100).
價格種類 (Ref. 80766): Unknown.