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dc.contributor.authorHurtado-Ponce, Anicia Q.
dc.date.accessioned2011-06-22T09:35:40Z
dc.date.available2011-06-22T09:35:40Z
dc.date.issued1996
dc.identifier.citationHurtado-Ponce, A. Q. (1996). Gracilaria studies at SEAFDEC/AQD. In Report on a Regional Study and Workshop on the Taxonomy, Ecology and Processing of Economically Important Red Seaweeds (pp. 311-317). Bangkok, Thailand: Network of Aquaculture Centres in Asia-Pacific.en
dc.identifier.urihttp://hdl.handle.net/10862/408
dc.description.abstractResearch in seaweed from 1988–1994 focused on the agar producing Gracilaria. Studies in the following areas were also conducted: inventory of the seaweed resources; production ecology; farming systems; and agar characterisation. Six species of Gracilaria and one Gracilariopsis abound in the Western Visayas. There were monthly variations in biomass and agar quality of G. blodgettii, G. manilaensis and G. heteroclada collected at different places. The bulk of the studies were carried out on Gracilariopsis heteroclada because of its wide distribution, fast growth characteristics and good quality agar. Its reproductive state was seasonal with tetrasporophyte abundant in May and carposporophyte in January. Seventy-five percent harvesting of the available biomass was sufficient for the next cropping season. Harvesting the seaweed using “araña” was not appropriate in places where the biomass was exposed to air during the lowest tide. The addition of nutrients to the stock increased the growth rate of the seaweed and gel strength of the agar. G. heteroclada grown at lower stocking density in hapa nets, both in floating cages and in ponds, gave higher growth rates and production than at higher stocking densities. This species, when polycultured with P. monodon at lower stocking density combinations, gave the highest growth rate and income. Likewise, this species when cultured vertically in ropes inside a floating cage showed encouraging results. G. heteroclada, when grown at 24–25 ppt under tank conditions, produced the highest gel strength.en
dc.language.isoenen
dc.publisherNetwork of Aquaculture Centres in Asia-Pacificen
dc.relation.ispartofseriesNACA Environment and Aquaculture Development Series No. 3en
dc.relation.urihttp://www.fao.org/docrep/field/009/ag152e/AG152E16.htm#anxIV6
dc.subjectGracilariopsis heteroclada
dc.subjectGracilaria blodgettii
dc.subjectGracilaria manilaensis
dc.subjectGracilaria
dc.subjectPhilippinesen
dc.subject.lccVF SP 212
dc.titleGracilaria studies at SEAFDEC/AQDen
dc.typeConference paperen
dc.citation.spage311
dc.citation.epage317
dc.subject.asfaAgaren
dc.subject.asfaSeaweed cultureen
dc.subject.asfaaquaculture developmenten
dc.subject.asfaSeaweed productsen
dc.subject.asfaaquaculture systemsen
dc.subject.asfaIndustrial productionen
dc.citation.conferenceTitleReport on a Regional Study and Workshop on the Taxonomy, Ecology and Processing of Economically Important Red Seaweeds, 24-27 January 1995, Bangkok, Thailanden


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