The effects of stocking and fisheries management based on virtual population analysis of the Ishikari [Japan] Bay herring Clupea pallasii

• Published in: Scientific Reports of Hokkaido Fisheries Experimental Station (Japan) no. 77
• Main Authors: Yamaguchi, M., Hokkaido. Central Fisheries Experiment Station, Yoichi (Japan), Takiya, A, Yamaguchi, H, Miyake, H, Takayanagi, S
• Format: Journal Article
• Language: Japanese
• Published: 01.03.2010
• Subjects: CLUPEA PALLASII; DINAMICA DE POBLACIONES; DYNAMIQUE DES POPULATIONS; EVALUACION; EVALUATION; FISHERY RESOURCES; GESTION DES RESSOURCES; http://www.fao.org/aos/agrovoc#c_24130; http://www.fao.org/aos/agrovoc#c_2736; http://www.fao.org/aos/agrovoc#c_2942; http://www.fao.org/aos/agrovoc#c_39009; http://www.fao.org/aos/agrovoc#c_6111; http://www.fao.org/aos/agrovoc#c_6524; http://www.fao.org/aos/agrovoc#c_6897; http://www.fao.org/aos/agrovoc#c_7377; MAR DEL JAPON; MER DU JAPON; METHODE STATISTIQUE; METODOS ESTADISTICOS; ORDENACION DE RECURSOS; POPULATION DYNAMICS; RECURSOS PESQUEROS; REPEUPLEMENT ANIMAL; REPOBLACION ANIMAL; RESOURCE MANAGEMENT; RESSOURCE HALIEUTIQUE; RESTOCKING; SEA OF JAPAN; STATISTICAL METHODS
• ISSN: 0914-6830

The catch of the Ishikari Bay herring (Clupea pallasii) has increased to about 200 tons since 1997. Virtual population analysis (VPA) has suggested that this increase was caused by greater recruitments of 1995 and 1996 year classes due to high recruitment per spawning biomass (RPS). The RPS rose again in 2001, and the 2001 year class increased the catch to more than 1,000 tons in 2004. Stocking and fisheries management have been conducted since 1996 and 2003, respectively. The effects of these measures were estimated to be 34 tons and 1,750 tons in fisheries year 2008 from calculation using VPA parameters. It is considered that the stocking and the fisheries management contributed synergistically to this increase in the catch.