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dc.contributor.authorHurtado-Ponce, Anicia Q.
dc.contributor.editorBagarinao, Teodora, U.
dc.contributor.editorFlores, Efren Ed C.
dc.date.accessioned2011-06-03T09:23:14Z
dc.date.available2011-06-03T09:23:14Z
dc.date.issued1995
dc.identifier.citationHurtado-Ponce, A. Q. (1995). Research on seaweeds and mollusks. In T. U. Bagarinao & E. E. C. Flores (Eds.), Towards Sustainable Aquaculture in Southeast Asia and Japan: Proceedings of the Seminar-Workshop on Aquaculture Development in Southeast Asia, Iloilo City, Philippines, 26-28 July, 1994 (pp. 199-208). Tigbauan, Iloilo, Philippines: Aquaculture Department, Southeast Asian Fisheries Development Center.en
dc.identifier.isbn971851127X
dc.identifier.urihttp://hdl.handle.net/10862/118
dc.description.abstractResearch on seaweeds focused on the carrageenan-producing Kappaphycus alvarezii and the agar-producing Gracilaria spp. Growth of K. alvarezii was better on horizontal lines than on vertical or cluster lines from bamboo rafts. All morphotypes (brown green, and red) grew faster at 50 cm than at 100 cm below the water surface, but the green morphotype showed better carrageenan properties. A socioeconomic survey of K. alvarezii farming in Panagatan Cays, Antique revealed that a farmer has an average annual production of 3 tons/ha (dry) with the fixed bottom and hanging longline methods. Three species of Gracilaria in natural beds in lloilo showed monthly variations in biomass and agar quality; G. heteroclada had the highest biomass and gel strength. When this species was grown in tanks, growth and agar sulfate content were influenced by the interaction of light, salinity, and nutrients. Enriched and unenriched stocks of G. heteroclada differed in agar quality. When G. heteroclada was grown with the tiger shrimp Penaeus monodon in extensive ponds, the highest growth rate and production were obtained at the seaweed stocking density of 250 g/m2; this was in November when average water temperature, transparency, and salinity were low. Salinity tolerance varies among Gracilaria species.Oyster (Crassostrea iredalei) and mussel (Perna viridis) farming in Western Visayas were assessed in 1992 in terms of the culture methods, socioeconomics, marketing, and profitability. A more localized survey of oyster and mussel fanning was conducted through rapid rural appraisal in two coastal towns in 1993. A farmer-participatory study followed in 1994 for the culture of oysters, mussels, seaweeds, and rabbitfishes in a river mouth in Dumangas, lloilo. Green mussel, brown mussel (Modiolus metcalfei), and seaweeds transplanted to Dumangas from Capiz have reproduced. In another study, the green mussel was tested as a biological filter in tiger shrimp ponds; shrimps stocked with mussels grew better than those without. A nationwide survey on the Placuna placenta fishery in 1993 showed 27 remaining 'kapis' beds; many others have been depleted due to excessive gathering, pollution, siltation, and trawling. Broodstocks are being developed to produce 'kapis' seed for grow-out and restocking. For the first time at AQD, adult donkey-ear abalone Haliotis asinina from the wild spawned naturally in laboratory tanks. Juvenile abalones can be successfully grown on Gracilaria or abalone diet.en
dc.language.isoenen
dc.publisherAquaculture Department, Southeast Asian Fisheries Development Centeren
dc.subjectPenaeus monodonen
dc.subjectHaliotisen
dc.subjectDecapodaen
dc.subjectPerna viridisen
dc.subjectMolluscaen
dc.subjectModiolus metcalfeien
dc.subjectPlacuna placentaen
dc.subjectKappaphycus alvareziien
dc.subjectHaliotis asininaen
dc.subjectGracilariaen
dc.subjectCrassostrea iredaleien
dc.subjectGiant tiger prawnen
dc.subjectPhilippines, Western Visayasen
dc.subjectPhilippines, Panay I., Antique, Caluya, Panagatan Caysen
dc.subjectSouth East Asiaen
dc.subjectPhilippines, Panay I., Antiqueen
dc.subjectPhilippines, Panay I., Iloilo, Dumangasen
dc.subjectGracilaria heteroclada
dc.titleResearch on seaweeds and mollusksen
dc.typeConference paperen
dc.citation.spage199
dc.citation.epage208
dc.subject.asfaagaren
dc.subject.asfastocking densityen
dc.subject.asfamussel cultureen
dc.subject.asfacarrageeninsen
dc.subject.asfaenvironmental factorsen
dc.subject.asfachromosomesen
dc.subject.asfasocioeconomic aspectsen
dc.subject.asfaresearchen
dc.subject.asfaseaweedsen
dc.subject.asfamarine crustaceansen
dc.subject.asfaaquaculture techniquesen
dc.subject.asfagrowth rateen
dc.subject.asfaseed (aquaculture)en
dc.subject.asfabiofiltersen
dc.subject.asfatransplantationen
dc.subject.asfashellfish cultureen
dc.subject.asfaextensive aquacultureen
dc.subject.asfastock assessmenten
dc.subject.asfapond cultureen
dc.subject.asfamollusc cultureen
dc.subject.asfapolyculture (aquaculture)en
dc.subject.asfaoyster cultureen
dc.subject.asfaseed productionen
dc.subject.asfaspawningen
dc.subject.asfaaquaculture economicsen
dc.subject.asfaculture tanksen
dc.subject.asfacage cultureen
dc.subject.asfamarine molluscsen
dc.subject.asfamaricultureen
dc.subject.asfaseaweed cultureen
dc.citation.conferenceTitleTowards sustainable aquaculture in Southeast Asia and Japan: Proceedings of the Seminar-Workshop on Aquaculture Development in Southeast Asia, Iloilo City, Philippines, 26-28 July, 1994en
dc.subject.scientificNamePenaeus monodonen
dc.subject.scientificNameMagallana bilineataen


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