SEAFDEC/AQD-Japan International Research Center for Agricultural Sciences (JIRCAS)
http://hdl.handle.net/10862/3328
2024-03-29T14:22:42ZAbove ground dry matter gain and loss in a young mangrove forest in the stand development process: An example in southern Thailand
http://hdl.handle.net/10862/6102
Above ground dry matter gain and loss in a young mangrove forest in the stand development process: An example in southern Thailand
Tabuchi, Ryuichi; Bunyavejchewin, Sarayudh
Ogawa, Yasuki; Ogata, Hiroshi Y.; Maeno, Yukio; Shimoda, Toru; Fujioka, Yoshimi; Fukuda, Yutaka
This paper introduces an example of the dynamics of living and dead mass analysis of a young natural mangrove stand in southern Thailand over a period of 12 years.
2003-01-01T00:00:00ZFisheries management, utilization of fishing ground and marine catches in Peninsular Malaysia
http://hdl.handle.net/10862/6094
Fisheries management, utilization of fishing ground and marine catches in Peninsular Malaysia
Haron, Muhammad Fadzil
Ogawa, Yasuki; Ogata, Hiroshi Y.; Maeno, Yukio; Shimoda, Toru; Fujioka, Yoshimi; Fukuda, Yutaka
In the JIRCAS international research project: Studies on sustainable production systems of aquatic animals in brackish mangrove areas which was started in 2001, the authors in Peninsular Malaysia have been conducting fundamental researches on life cycle, food habit, fishing, etc. of Snappers and Groupers under the Malaysia research theme: Studies on coupling habitat, biology and management of commercially important fish species in mangrove estuaries .
Parallel with understanding of the actual conditions of marine capture fisheries and aquaculture of Snappers and Groupers in Malaysia, we also need to know the outline of fishery in Malaysia through analyzing a lot of information pertaining to it. In the present concise report, we show current fisheries management, utilization of fishing ground and long-term trend of total marine catches in Peninsular Malaysia.
2003-01-01T00:00:00ZMangrove zooplankton of Matang mangrove estuaries: Preliminary assessment of spatio-temporal abundance in relation to environmental parameters
http://hdl.handle.net/10862/6093
Mangrove zooplankton of Matang mangrove estuaries: Preliminary assessment of spatio-temporal abundance in relation to environmental parameters
Chong, Ving Ching; Ooi, Ai Lin; Chew, Li Lee; Ogawa, Yasuki
Ogawa, Yasuki; Ogata, Hiroshi Y.; Maeno, Yukio; Shimoda, Toru; Fujioka, Yoshimi; Fukuda, Yutaka
An on-going zooplankton study in the Matang mangrove swamp beginning April 2002 has shown that zooplankton wet biomasses determined over 5 months were relatively higher inside the mangrove swamp (1.17± 0.35 g m<sup>-3</sup>) than in adjacent offshore waters (0.87 ± 0.55 g m<sup>-3</sup>). Total zooplankton densities ranged from 1.2 x 10<sup>4</sup> - 5.82 x 10<sup>4</sup> individuals per m<sup>3</sup> inside the swamp, whereas in offshore waters zooplankton densities ranged from 1.03 x 10<sup>4</sup> - 2.83 x 10<sup>4</sup> individuals per m<sup>3</sup>. Crustaceans, dominated by copepods and cirripede larvae, constituted more than 70%, followed by polychaetes and chaetognaths. Fish larvae made up less than 0.5% of the total densities. Preliminary PCA of 50 zooplankton taxa suggests that the swamp taxa but not (so much) the offshore taxa differed spatio-temporally, and that more fish larvae and young copepods were caught inside the swamp. The larval fish density (surface hauls) ranged from 12-669 individuals per 100 m<sup>-3</sup> inside the swamp, whereas in offshore waters it ranged from 21-290 individuals per 100 m<sup>-3</sup>. The major families of fish larvae were Engraulididae (ca. 60%) and Gobiidae (ca. 30%). Engraulid larvae were ubiquitous in distribution occurring from swamp to 14 km offshore, while gobiid larvae were more restricted to the swamp. Other families identified included the Scatophagidae, Ambassidae, Blennidae, Sciaenidae, Cynoglossidae, Scorpaenidae, Carangidae and Syngnathidae. Preliminary CCA suggests that salinity, turbidity and zooplankton size and abundance may be important factors regulating the distribution and abundance of fish larvae. However, its interpretation is cautioned due to the limited data. A larger data set is needed to correlate larval fish abundance with the environmental factors.
2003-01-01T00:00:00ZMigration, growth and feeding habit of John's snapper Lutjanus johnii and duskytail grouper Epinephelus bleekeri in Merbok mangrove brackish river
http://hdl.handle.net/10862/6090
Migration, growth and feeding habit of John's snapper Lutjanus johnii and duskytail grouper Epinephelus bleekeri in Merbok mangrove brackish river
Ogawa, Yasuki
Ogawa, Yasuki; Ogata, Hiroshi Y.; Maeno, Yukio; Shimoda, Toru; Fujioka, Yoshimi; Fukuda, Yutaka
This study was conducted to estimate the migration and population growth in total length and to observe the food organisms found in the stomach of John's snapper and Duskytail grouper. John's snapper and Duskytail grouper were caught monthly between October 2001 and September 2002 at the Merbok mangrove brackish river, Kedah, Japan. A total of 1308 John's snapper juvenile fishes with total length ranging from 61 to 238 mm were collected.
2003-01-01T00:00:00Z