PIMRIS Regional Repositry
close this section of the library Manu, N.

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View the PDF document Breeding season of the Tongan shellfish 3. Elongated giant clam (kukukuku), Tridacna maxima (In Fisheries Research Bulletin of Tonga, Volume 3, 1995)
Author(s): Manu, N., Sone, S.
Publisher: Ministry of Fisheries, Tonga
Place: Nuku'alofa (Tonga)
Notes: pp. 25-33
ASFA Keywords: Clam fisheries, Breeding, Breeding seasons
Country Collection: Tonga
Abstract: Monthly samples of T. maxima were taken at Vuna Wharf fish market in Tongatapu Island from April 1992 to March 1993. T. maxima at 40-59mm SL were all male. The ratio of hermaphrodite shells grandually increased from 60mm SL to 140mm SL at which size all shells became hermaphrodite.

View the PDF document Breeding season of the Tongan shellfish. 4. Turbans ('Elili), Turbo spp. (In Fisheries Research Bulletin of Tonga, Volume 6, 1996)
Author(s): Manu, N., Sone, S.
Publisher: Ministry of Fisheries, Tonga
Place: Nuku'alofa (Tonga)
Notes: pp. 1-8
ASFA Keywords: Shellfish fishery, Breeding seasons, Fishery development
Country Collection: Tonga
Abstract: Monthly samples of Turbo setosus were taken in the Tongatapu island group from April 1992 to March 1993. The maximum gonad index was observed in April 1992, however, another three peaks also appeared with 3 - 4 months intervals. Spawning of T. setosus seems to occur throughout the year in Tonga.

View the PDF document A preliminary seed production of green snail (Turbo marmoratus) in Tonga (In Fisheries Research Bulletin of Tonga, Volume 5, 1996)
Author(s): Manu, N., Fa'anunu, 'U., Niumeitolu, S.
Publisher: Ministry of Fisheries, Tonga
Place: Nuku'alofa (Tonga)
Notes: pp. 1-12
ASFA Keywords: Gastropod fisheries, Fishery development, Breeding, Rearing
Country Collection: Tonga
Abstract: Green snail, Turbo marmoratus, is a very important marine resource in the South Pacific Island countries. Although there are suitable habitats in Tonga, this species does not occur naturally.

View the PDF document The present status of introduced trochus and green snail in the Tongatapu Island group (In Fisheries Research Bulletin of Tonga, Volume 4, 1995)
Author(s): Kikutani, K., Fa'anunu, 'U., Manu, N.
Publisher: Ministry of Fisheries, Tonga
Place: Nuku'alofa (Tonga)
Notes: pp. 31-36
ASFA Keywords: Marine molluscs, Mollusc fisheries, Fishery development, Surveys
Country Collection: Tonga
Abstract: Trochus, Trochus niloticus, and green snail, Turbo marmoratus, contribute to the foreign income of the South Pacific Islands countries, however, although there are suitable habitats for them, neither species occurs naturally in Tonga.

View the PDF document A tank culture trial of the seaweed, Gracilaria sp. (In Fisheries Research Bulletin of Tonga, Volume 3, 1995)
Author(s): Manu, N., Kava, V., Kikutani, K.
Publisher: Ministry of Fisheries, Tonga
Place: Nuku'alofa (Tonga)
Notes: pp. 19-24
ASFA Keywords: Seaweeds, Seaweed culture, Fisheries development
Country Collection: Tonga
Abstract: The red algae of genus Gracilaria is important as food for the green snail in its seed production and brood stock culture (Kikutani, 1994). The Ministry of Fisheries of Tonga presently maintains 73 green snails in a 4.5m3 concrete raceway tank with Gracilaria sp. as the main food.

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