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Rochia nilotica   (Linnaeus, 1767)

Commercial top
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Rochia nilotica

Australia country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: commercial | Ref: Poutiers, J.M., 1998
Aquaculture: never/rarely | Ref:
Regulations: no regulations | Ref:
Uses: no uses
Comments: Commercial fisheries (Ref. 349). C: Refs. 349, 75835, 106765, 106766.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/as.html
National Fisheries Authority: http://www.csiro.au/
Occurrences: Occurrences Point map
Main Ref: Poutiers, J.M., 1998
National Database:

Common names from other countries

Commercial top shell, ... more

Classification / Names / Names Tên thường gặp | Các synonym ( Các tên trùng) | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS

> Trochida () > Tegulidae () > Trochinae

Environment: milieu / climate zone / depth range / distribution range Sinh thái học

; Mức độ sâu 0 - 20 m (Ref. 349).   Tropical; 32°N - 25°S, 45°E - 171°E (Ref. 81851)

Sự phân bố Các nước | Các khu vực của FAO | Các hệ sinh thái | Những lần xuất hiện | Những chỉ dẫn

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 / Bộ gần gũi / Khối lượng (Trọng lượng) / Age

Maturity: Lm ?  range ? - ? cm Max length : 15.0 cm SHH con đực/không giới tính; (Ref. 349); common length : 11.0 cm SHL con đực/không giới tính; (Ref. 349)

Short description Hình thái học

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).

Sinh học     Tự điển (thí dụ 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 Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng

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

Main reference Các tài liệu tham khảo | Người điều phối | Người cộng tác

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

IUCN Red List Status (Ref. 130435)

  Not Evaluated 

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless

Human uses

Các nghề cá: Tính thương mại
FAO - Các nghề cá: landings | FishSource | Biển chung quanh ta

Các công cụ

E-book | Hướng dẫn hiện trường

Các nguồn internet

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Các nghề cá: ; publication : search) | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Cây Đời sống | Wikipedia (Go, tìm) | Tạp chí Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 26.3 - 29.3, mean 28.7 (based on 2725 cells).
Thích nghi nhanh (Ref. 69278) Trung bình, thời gian nhân đôi của chủng quần tối thiểu là 1.4 - 4.4 năm (K=0.19-0.36).
Vulnerability (Ref. 71543): Low vulnerability (10 of 100).
Price category (Ref. 80766): Unknown.