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 Noms communs | Synonymes | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS

> Trochida () > Tegulidae () > Trochinae

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

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

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Introductions

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 / Taille / Poids / Âge

Maturity: L_m ? range ? - ? cm Max length : 15.0 cm SHH mâle / non sexé; (Ref. 349); common length : 11.0 cm SHL mâle / non sexé; (Ref. 349)

Description synthétique Morphologie

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).

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 Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

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

Référence principale Références | Coordinateur | Collaborateurs

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

Statut dans la liste rouge de l'IUCN (Ref. 130435)

Non évalué

statut CITES (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

Harmless

Utilisations par l'homme

Pêcheries: commercial
FAO - pêcheries: landings | FishSource | Sea Around Us

Outils

E-book | Guide de terrain

Plus d'informations

Pays
Zones FAO
Écosystèmes
Occurrences
Introductions
Stocks
Écologie
Régime alimentaire
Éléments du régime alimentaire

Noms communs
Synonymes
Prédateurs
Reproduction
Maturité
Frai
Fécondité
Œufs
Développement de l'œuf

Taille/Âge
Croissance
Longueur-poids
Longueur-longueur
Morphologie
Larves
Abondance

Références
Mass conversion

Collaborateurs
Images

Sources Internet

Estimates based on models

Preferred temperature (Ref. 115969): 26.3 - 29.3, mean 28.7 (based on 2725 cells).

Résilience (Ref. 69278) Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (K=0.19-0.36).

Vulnérabilité (Ref. 71543): Low vulnerability (10 of 100).

Catégorie de prix (Ref. 80766): Unknown.

Rochia nilotica (Linnaeus, 1767)