SEAFDEC/AQDINSTITUTIONAL REPOSITORY
    • English
    • 日本語
    • ไทย
    • Bahasa Indonesia
  • English 
    • English
    • 日本語
    • ไทย
    • Bahasa Indonesia
  • Login
View Item 
  •   SEAFDEC/AQD Institutional Repository Home
  • 03 SEAFDEC/AQD External Publications
  • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
  • Conference Proceedings
  • View Item
  •   SEAFDEC/AQD Institutional Repository Home
  • 03 SEAFDEC/AQD External Publications
  • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
  • Conference Proceedings
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Gracilaria studies at SEAFDEC/AQD

  • Global styles
  • MLA
  • Vancouver
  • Elsevier - Harvard
  • APA
  • Help
Thumbnail
Download URL
www.fao.org
Date
1996
Author
Hurtado-Ponce, Anicia Q.
Page views
2,293
ASFA keyword
agar ASFA
seaweed culture ASFA
aquaculture development ASFA
seaweed products ASFA
aquaculture systems ASFA
industrial production ASFA
AGROVOC keyword
Gracilaria manilaensis
Gracilaria AGROVOC
Philippines AGROVOC
Taxonomic term
Gracilariopsis heteroclada GBIF
Gracilaria blodgettii GBIF
Metadata
Show full item record
Share 
 
Abstract
Research 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.
URI
http://hdl.handle.net/10862/408
Suggested Citation
Hurtado-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.
Type
Conference paper
Series
NACA Environment and Aquaculture Development Series No. 3
Collections
  • Conference Proceedings [298]

Related items

Showing items related by title, author, creator and subject.

  • Thumbnail

    Research on seaweeds and mollusks 

    Hurtado-Ponce, Anicia Q. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1995)
    Research 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 ...
  • Thumbnail

    Carpospore germination and early stages of development in Gracilaria edulis (Gmelin) Silva and Gracilaria rubra Chang et Xia (Gracilariales, Rhodophyta) 

    Hurtado-Ponce, Anicia Q. (San Carlos Publications, University of San Carlos, 1993)
    Carpospore germination and early stages of development in Gracilaria edulis and Gracilaria rubra of the Philippines are described for the first time. Both species follow the "Dumontia type" or the immediate discal type of ...
  • Thumbnail

    Proceedings of the Seminar-Workshop on Aquaculture Development in Southeast Asia and Prospects for Seafarming and Searanching, 19-23 August 1991, Iloilo City, Philippines 

    Lacanilao, F.; Coloso, Relicardo M.; Quinitio, Gerald F. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1994)
    Documents the presentations at ADSEA '91, the 2nd Seminar-Workshop on Aquaculture Development in Southeast Asia. ADSEA '91 includes reviews of the status of the researches conducted by Southeast Asian Fisheries Development ...

© SEAFDEC/AQD  2025
Send Feedback | Subscribe
 

 

Browse

All of SAIRCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

Statistics

View Usage Statistics

© SEAFDEC/AQD  2025
Send Feedback | Subscribe
 

 

Export citations

Export the current results of the search query as a citation list. Select one of the available citation styles, or add a new one using the "Citations format" option present in the "My account" section.

The list of citations that can be exported is limited to items.

Export citations

Export the current item as a citation. Select one of the available citation styles, or add a new one using the "Citations format" option present in the "My account" section.

Export Citations

EXTERNAL LINKS DISCLAIMER

This link is being provided as a convenience and for informational purposes only. SEAFDEC/AQD bears no responsibility for the accuracy, legality or content of the external site or for that of subsequent links. Contact the external site for answers to questions regarding its content.

If you come across any external links that don't work, we would be grateful if you could report them to the repository administrators.

Click DOWNLOAD to open/view the file. Contact us in case the link we provided don't work.

Download

DOCUMENT REQUEST NOT AVAILABLE

This publication is still available (in PRINT) and for sale at AQD bookstore. The library is currently restricted to send PDF of publications that are still for sale.

You may contact bookstore@seafdec.org.ph or visit AQD bookstore for orders.

FILE UNDER EMBARGO

This file associated with this publication is currently under embargo. This will be available for download after the embargo date.