Title Effect of adult density on 0 juvenile density of the abalone Haliotis discus hannai.
Authers Hiroshi HOSHIKAWA, Kazuhiro TAKAHASHI, Fujinori TSUDA and Yuji MACHIGUCHI
Keywords Abalone, Haliotis discus hannai, adult density, 0 juvenile density
Citation Bull. Fish. Res. Agen. supplement No. 5, 119-126, 2006
The density of adult abalone, Haliotis discus hannai, was enhanced by releasing artificially reared juveniles(ca. shell length 50mm) to clarify the effect of adult density on the amount of recruitment near the study area. Though the density of abalone in 2001 before the release of artificial juveniles was 0.09 individuals/m2, the density increased significantly to 1.18 individuals/m2 after releasing reared juveniles in 2002 and in 2003. The released abalone matured and spawned normally in each year. The density of 0 juveniles(SL 4.6-11.6mm)sampled in winter increased significantly from 0.8 individuals/m2 in 2002 to 3.5 individuals/m2 in 2004.
URI http://www.fra.affrc.go.jp/bulletin/bull/bull-b5/22.pdf