Interannual variation of hydrographical condition related to the reproduction of tiger puffer Takifugu rubripes in Ise and Mikawa Bays, Japan

Abstract

We studied the variation of recruitment per spawning of the tiger puffer Takifugu rubripes in Ise and Mikawa Bays, Japan with special reference to temperature and salinity for clarifying the controlling factors of its interannual variation from 1993 to 2012. Interannual variation in the recruitment per spawning is positively correlated with the 10 m-depth temperature in the central area of Ise Bay in February, 5 m-depth salinity in the central area in March and 10 m-depth salinity in the bay head in April, and negatively correlated with the 30 m-depth temperature in the central area in July. On the basis of the results in a stepwise multiple linear regression analysis, we hindcast the recruitment per spawning from 1993 to 2012 using the temperature and salinity around Ise Bay.