Release‐recapture experiments were conducted to examine temporal changes of the carbon and nitrogen stable isotope (δ 13 C and δ 15 N) ratios in the muscle tissue of artificially produced Japanese flounder Paralichthys olivaceus , juveniles. About 9000 juveniles (mean ± s . d . 43·3 ± 5·2 mm in standard length and 1·07 ± 0·37 g, n = 15) were released in each of three coastal areas: Chojagasaki, Arasaki and Jogashima with diffe...

To determine the distribution of marine birnavirus (MABV) in cultured populations of different marine fish species, 1291 pooled tissue samples from 2672 fish belonging to 22 species and one hybrid were collected from Kagawa Prefecture, Japan, during 1999–2001. Using cell‐culture MABV was isolated from three species: yellowtail, Seriola quinqueradiata Temminck & Schlegel (positive number/sample number, 10/419), amberjack, S. du...