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close this section of the library Breeding

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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)
Date: 1995
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 Tongan shellfish. 5. Short-spine sea urchin (Tukumisi), Tripneustes gratilla (In Fisheries Research Bulletin of Tonga, Volume 6, 1996)
Author(s): Loto'ahea, T., Sone, S.
Publisher: Ministry of Fisheries, Tonga
Place: Nuku'alofa (Tonga)
Date: 1996
Notes: pp. 9-14
ASFA Keywords: Echinoderm fisheries, Breeding, Fishery development
Country Collection: Tonga
Abstract: Monthly samples of the short-spine sea urchin, Tripneustes gratilla, were taken at Vuna fish market in Nukualofa from January to November 1995. The average gonad index of each sample was determined and the seasonal trend was found to follow the seasonal change of sea water temperature with the exception of February and May.

View the PDF document Growth of fingerlings of big-belly mullet, Liza macrolepis, fed with local products (In Fisheries Research Bulletin of Tonga, Volume 2, 1994)
Author(s): Fale, P., Paongo, O., Niumeitolu, S.
Publisher: Ministry of Fisheries, Tonga
Place: Nuku'alofa (Tonga)
Date: 1994
Notes: pp. 1-6
ASFA Keywords: Mullet fisheries, Feed experiments, Breeding, Fisheries development
Country Collection: Tonga
Abstract: Effects on the growth of big-belly mullet, Liza macrolepis, was examined for three kinds of locally produced materials, namely, cassava, squash pumpkin and beer brewery residue, in a rearing experiment. All materials were processed to meal and mixed with formula feed for carp imported from Japan at 1:1 in weight before given to each batch of fish reared in separate tanks.

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)
Date: 1996
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 Transport of live green snails, Turbo marmoratus, from Vanuatu to Tonga (In Fisheries Research Bulletin of Tonga, Volume 1, 1994)
Author(s): Fa'anunu, U., Sone, S.
Publisher: Ministry of Fisheries, Tonga
Place: Nuku'alofa (Tonga)
Date: 1994
Notes: pp. 7-11
ASFA Keywords: Gastropod fisheries, Breeding, Fisheries development
Country Collection: Tonga
Abstract: Fifty live green snails, Turbo marmoratus, were successfully transported from Vanuatu to Tonga. The average body weight of the green snails was 2kg. The green snails were packed in plastic containers with paper towels wetted by seawater which contained streptomycin sulfate at 50 ppm in concentration. Transportation time was seventeen hours and twenty minutes.

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