Problems Associated with the Recovery on Landings of Black Sea Bream (Acanthopagrus schlegelii) Intensively Released in Hiroshima Bay, Japan
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.
KeywordsPacific Oyster Stock Biomass Stock Enhancement Program Intensive Release Japanese Pufferfish
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).
- Born AF, Immink AJ, Bartley DV (2004) Marine and coastal stocking: global status and information needs. In: Bartley DM, Leber KL (eds) Marine ranching. F.A.O. Fish Tech. Paper 429:1–18Google Scholar
- Blanco Gonzalez E, Umino T (2009) Fine-scale genetic structure derived from stocking black sea bream, Acanthopagrus schlegelii (Bleeker, 1854), in Hiroshima Bay, Japan. J Appl Ichthyol 25:407-410Google Scholar
- Blankenship HL, Leber KM (1995) A responsible approach to marine stock enhancement. Am Fish Soc Symp 15:167–175Google Scholar
- Imamura K (1999) The Organization and Development of Sea Farming in Japan. In: Howell BR, Mokness E, Svasand T (eds) Stock enhancement and sea ranching. Fishing New Books, Oxford, pp 91–102Google Scholar
- JFRA (Japanese Fisheries Research Agency) (2008) http://ncse.fra.affrc.go.jp/00kenkyu/00index.html. Accessed 10 Aug
- Kitada S (1999) Effectiveness of Japan’s stock enhancement programs: current perspectives. In: Howell BR, Mokness E, Svasand T (eds) Stock enhancement and sea ranching. Fishing New Books, Oxford, pp 103–131Google Scholar
- Nakagawa H, Umino T, Hayashi M, Sasaki T, Okada K (2000) Changes in biochemical composition of black sea bream released at 20 mm size in Daiô Bay, Hiroshima. Suisanzoshoku 48:643–648Google Scholar
- Saito H, Nakano Y, Tanaka A, Kawai K, Imabayashi H, Shigeta T (2005) Role of oyster rafts as the feeding sites of fishes. Bull Jap Soc Fish Ocean 69:194–197Google Scholar
- Sugaya T (2005) Organization and development of stock enhancement in Japan. In: Primavera JH, Quinitio ET, Eguia MRR (eds) Proc Reg Tech. Consultation Stock Enhancement for Threatened Species of Int. Concern, Iloilo, pp 91–101Google Scholar
- Takatsuji H (2003) Variation of water temperature and salinity in Hiroshima Bay over the past 30 years. 5th Research Workshop on Hiroshima Bay – Impact of the recent increment of water temperature on the ecology and fisheries in Hiroshima Bay. Bull Jap Soc Fish Ocean 67:261–277 (in Japanese)Google Scholar
- Umino T, Hayashi M, Miyatake J, Nakayama K, Sasaki T, Okada K, Nakagawa H (1999) Significance of release of black sea bream at 20-mm size on stock enhancement in Daiô Bay, Hiroshima. Suisanzoshoku 47:337–342Google Scholar