Problems Associated with the Recovery on Landings of Black Sea Bream (Acanthopagrus schlegelii) Intensively Released in Hiroshima Bay, Japan

  • Tetsuya Umino
  • Enrique Blanco Gonzalez
  • Hidetoshi Saito
  • Heisuke Nakagawa
Conference paper


Stock enhancement programs are conducted worldwide, with Japan leading in marine species. One of the target species for release in the country is black sea bream (Acanthopagrus schlegelii). A stock enhancement program for this fish in Hiroshima Bay has been conducted over the last 3 decades. The large number of juveniles released has contributed to fishery recovery.

Nevertheless, the augmentation of landings has led to several problems. The reduction of the market price of the species, an augmentation of the social pressure from oyster farmers demanding the protection of their interests, and losses of the genetic resources of the natural stock of black sea bream are some of the problems encountered.

In this chapter, we discuss the main constraints associated with the increase in the stock biomass.

In addition, some lessons learned and recommendations to be considered before and during the development of future stock enhancement programs are given.


Pacific Oyster Stock Biomass Stock Enhancement Program Intensive Release Japanese Pufferfish 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This study was supported by Grant-in-Aid for Scientific Research (C) from the Japan Society for the Promotion of Science (JSPS) to T.U. (nos.14560152 and 19580205).


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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Tetsuya Umino
    • 1
  • Enrique Blanco Gonzalez
    • 1
  • Hidetoshi Saito
    • 1
  • Heisuke Nakagawa
    • 1
  1. 1.Graduate School of Biosphere ScienceHiroshima UniversityHigashi-HiroshimaJapan

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