SEAFDECINSTITUTIONAL REPOSITORY
    • English
    • ไทย
    • 日本語
    • Bahasa Indonesia
    • Bahasa Melayu
    • Burmese
    • Filipino
    • Khmer
    • Lao
    • Tiếng Việt
  • English 
    • English
    • ไทย
    • 日本語
    • Bahasa Indonesia
    • Bahasa Melayu
    • Burmese
    • Filipino
    • Khmer
    • Lao
    • Tiếng Việt
  • Login
View Item 
  •   SEAFDEC Institutional Repository (SIR)
  • 01 SEAFDEC Publications
  • 11 Conference Proceedings
  • SEAFDEC/TD
  • Consolidating the Strategies for Fishery Resources Enhancement in Southeast Asia. Proceedings of the Symposium on Strategy for Fisheries Resources Enhancement in the Southeast Asian Region, Pattaya, Thailand, 27-30 July 2015
  • View Item
  •   SEAFDEC Institutional Repository (SIR)
  • 01 SEAFDEC Publications
  • 11 Conference Proceedings
  • SEAFDEC/TD
  • Consolidating the Strategies for Fishery Resources Enhancement in Southeast Asia. Proceedings of the Symposium on Strategy for Fisheries Resources Enhancement in the Southeast Asian Region, Pattaya, Thailand, 27-30 July 2015
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Potentials and Limitations of Stock Enhancement Programs in Japan

Thumbnail
View/Open
FujiiT2016.pdf (448.3Kb)
Date
2016
Author
Fujii, Tetsuo
Page views
156
Metadata
Show full item record

Share 
 
Abstract
In Japan, a lot of stock enhancement programs have been carried out in the last fifty years. Such programs have been successful in terms of cost-effectiveness as well as stocking efficiency. Seeds of 85 species of fishes, mollusks, crustaceans, and other aquatic organisms have been released for stock enhancement, including those of chum salmon Oncorhynchus keta and barfin flounder Verasper moseri in northern Japan, red sea bream Pagrus major in central and western Japan, and sawara Scomberomorus niphonius in Seto Inland Sea. To be successful, assessments of the natural stocks and investigations on the environment of their nursery grounds are necessary prior to seed release. However, if the natural stock is abundant compared with the capacity of hatcheries there would be no need for seed release. Healthy marine environment in the nursery ground is a prerequisite for effective seed release. Though overfishing sometimes results in high "recapture rate" of released fish, most of these cases are neither economically effective nor sustainable. A suitable fisheries management is needed. The carrying capacity of the nursery ground restricts the allowed number of released seed. In the case of hirame Paralichthys olivaceus, it tends to higher in northern Japan than in the southwestern areas. To evaluate both stocking efficiency and cost-effectiveness, YPR (Yield per Release = weight of landed 'recaptured fish' divided by number of released seeds) is recommended. YPR for successful cases is estimated to be more than 50 metric tons per 1 million seeds. Furthermore, since increased production often results in decline of price, socioeconomic studies are also important.
URI
http://hdl.handle.net/20.500.12067/709
Suggested Citation
Fujii, T. (2016). Potentials and limitations of stock enhancement programs in Japan. In Consolidating the Strategies for Fishery Resources Enhancement in Southeast Asia. Proceedings of the Symposium on Strategy for Fisheries Resources Enhancement in the Southeast Asian Region, Pattaya, Thailand, 27-30 July 2015 (pp. 136-139). Samutprakan, Thailand: Training Department, Southeast Asian Fisheries Development Center.
Subject
fishery economics ASFA; reefs ASFA; reef fisheries ASFA; resource conservation ASFA; fishing gear ASFA; Catching methods; habitat improvement (physical) ASFA; fishery resources ASFA; artificial reefs ASFA; socioeconomic aspects ASFA; fishery surveys ASFA; species diversity ASFA; resource surveys ASFA; artisanal fishing ASFA; coastal fisheries ASFA; Reef fish; Thailand
Collections
  • Consolidating the Strategies for Fishery Resources Enhancement in Southeast Asia. Proceedings of the Symposium on Strategy for Fisheries Resources Enhancement in the Southeast Asian Region, Pattaya, Thailand, 27-30 July 2015 [32]

Related items

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

  • Thumbnail

    Royal Initiative Project: Coastal Fishery Resource Rehabilitation in Pattani and Narathiwat Provinces, Thailand 

    Somchanakij, Hassapong; Ruangpatikorn, Nopparat; Awaiwanont, Kamonpan (Training Department, Southeast Asian Fisheries Development Center, 2016)
    The Royal Initiative Project on Coastal Fishery Resource Rehabilitation in Pattani and Narathiwat Provinces of Thailand has been implemented during 2002-2015. Five (5) types of materials are used for ARs, i.e. 707 concrete ...
  • Thumbnail

    Artificial Reefs Contribute to Marine Resources Enhancement 

    Akeda, Sadamitsu (Training Department, Southeast Asian Fisheries Development Center, 2016)
    When there are things such as sunken vessels in sea bottoms, Japanese ancient people knew by experience that various fishes gather near these sunken vessels. The function of sunken vessels is the same as natural reef. ...
  • Thumbnail

    Inland Fisheries Habitat Management of Myanmar 

    Kywe, Nilar; Oo, Thaw Tun; Oo, Aung Than (Training Department, Southeast Asian Fisheries Development Center, 2016)
    Leasable fisheries operate in fisheries waters in which fishing rights are granted under a lease by Department of Fisheries (DoF) of Myanmar, subject to stipulations relating to the area, species, fishing implement, period, ...

© SEAFDEC 2023
Contact Us
 

 

Browse

All of SIRCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

Statistics

View Usage Statistics
Related Links
SEAFDEC/TD IRSEAFDEC/AQD IRSEAFDEC/MFRDMD IRSEAFDEC/IFRDMD IR

© SEAFDEC 2023
Contact Us