Advertisement

You can sponsor this page

Rochia nilotica   (Linnaeus, 1767)

Commercial top
Adicionar o seu Fotografias 
 | Todas as fotos | Imagem do Google |
Image of Rochia nilotica (Commercial top)
Rochia nilotica

Philippines 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). Known throughout the Philippines, e.g., Samar (Ref. 821), Panay. This is collected by gleaning (Ref. 128042). Threatened (Ref. 89179). C: Refs. 349, 821, 8326, 75835, 90322, 97545, 106765, 106766,121724, 128042, 128987; M: Ref. 349; O: Refs. 821, 86518, 89179, 128042.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/rp.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Dolorosa, R.G., R.M. Picardal and S.F. Conales Jr., 2015
National Database:

Common names from other countries

Commercial top shell, ... more

Classification / Names / Names Nomes comuns | Sinónimos | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS

> Trochida () > Tegulidae () > Trochinae

Environment: milieu / climate zone / depth range / distribution range Ecologia

; intervalo de profundidade 0 - 20 m (Ref. 349).   Tropical; 32°N - 25°S, 45°E - 171°E (Ref. 81851)

Distribuição Países | Áreas FAO | Ecossistemas | Ocorrências | Introduções

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 / Tamanho / Peso / Idade

Maturity: Lm ?  range ? - ? cm Max length : 15.0 cm SHH macho/indeterminado; (Ref. 349); common length : 11.0 cm SHL macho/indeterminado; (Ref. 349)

Descrição breve Morfologia

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).

Biologia     Glossário (ex. 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 Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas

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

Referência principal Referências | Coordenador | Colaboradores

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

Categoria na Lista Vermelha da IUCN (Ref. 130435)

  Não avaliado 

Categoria CITES (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para o homem

  Harmless

Utilização humana

Pescarias: espécies comerciais
FAO - pescarias: landings | FishSource | Sea Around Us

Ferramentas

E-book | Guia de campo

Fontes da internet

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(pescarias: ; publication : search) | GenBank (genoma, nucleotídeo) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Árvore da vida | Wikipedia (ir para, procurar) | Registo zoológico

Estimates based on models

Preferred temperature (Ref. 115969): 26.3 - 29.3, mean 28.7 (based on 2725 cells).
Resiliência (Ref. 69278) Médio, tempo mínimo de duplicação da população 1,4 - 4,4 anos (K=0.19-0.36).
Vulnerabilidade (Ref. 71543): Low vulnerability (10 of 100).
Categoria de preço (Ref. 80766): Unknown.