Trochus niloticus

Invasion History

First Non-native North American Tidal Record:
First Non-native West Coast Tidal Record:
First Non-native East/Gulf Coast Tidal Record:

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General Invasion History:

None

North American Invasion History:

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Description

None

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Taxonomy

Ecology

Food:

Macroalgae

Consumers:

Humans

Trophic Status:

Herbivore

Herb

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Habitats

General Habitat	Coral reef	None
General Habitat	Rocky	None
Salinity Range	Euhaline	30-40 PSU
Tidal Range	Subtidal	None
Vertical Habitat	Epibenthic	None

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Tolerances and Life History Parameters

Minimum Reproductive Temperature	24	Field range, King Sound, Western Australia and Ambon Indonesia (Crowe et al. 2005)
Maximum Reproductive Temperature	30	Field range, King Sound, Western Australia and Ambon Indonesia (Crowe et al. 2005)
Minimum Duration	3	Settlement and metamophosis took 3-10 days in the presence of macroalgae (Heslinga 1981)
Maximum Duration	21	Settlement and metamophosis took 4-21 days in the absence of macroalgal inducers (Heslinga 1981)
Broad Temperature Range	None	Tropical
Broad Salinity Range	None	Euhaline

General Impacts

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Regional Impacts

SP-XIII	None		Economic Impact	Fisheries
The topshell Trochus niloticus was widely introduced for the mother-of-pearl in the shell and ts edible meat (Eldredge 1994).
SP-XII	None		Economic Impact	Fisheries
The topshell Trochus niloticus was widely introduced for the mother-of-pearl in the shell and ts edible meat (Eldredge 1994).
SP-VIII	None		Economic Impact	Fisheries
The topshell Trochus niloticus was widely introduced for the mother-of-pearl in the shell and ts edible meat (Eldredge 1994).

References

Borsa, P.; Benzie, J. A. H. (1996) Population genetics of Trochus niloticus and Tectus coeuulescens, topshells with short4ved larvae, Marine Biology 125: 531-541

Braley, Rick; Marsters, Mataora Bill; Taime, Rorangi (1997) Trochus niloticus spawnings at Tongareva Marine Research Centre, Penrhyn Atoll, Cook Islands, SPC Trochus Information Bulletin 5: 24-25

Brock, Vernon E. (1960) The introduction of aquatic animals into Hawaiian waters, Internationale Revue der Gesamten Hydrobiologie 45(4): 463-480

Carlton, J.T., Eldredge, L. (2001) <missing title>, Bernice P. Bishop Museum Press, Honolulu, Hawaii,. Pp. <missing location>

Crowe, Tasman P. and 10 authors (2002) Experimental evaluation of the use of hatchery-reared juveniles to enhance stocks of the topshell Trochus niloticus in Australia, Indonesia and Vanuatu, Aquaculture 206: 175-197

Eldredge, L.G. (1994) Perspectives in aquatic exotic species management in the Pacific Islands Vol. I. Introductions of commercially significant aquatic organisms to the Pacific islands, South Pacific Commission. Inshore Fisheries Research Project, Technical Document 7: 1-127

Harvard Museum of Comparative Zoology 2008-2021 Museum of Comparative Zoology Collections database- Malacology Collection. <missing URL>



Heslinga, Gerald H. (1981) Larval development, settlement, and metamorphosis of the tropical gastropod Trochus niloticus, Malacologia 20(2): 349-357

Smith, Barry D. (1987) Growth rate, distribution and abundance of the introduced topshell Trochus niloticus Linnaeus on Guam, Mariana Islands, Bulletin of Marine Science 41(2): 466-471

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