山口県土井ヶ浜の砂浜海岸サーフゾーンにおけるヒラメの出現

Occurrence of Japanese Flounder Paralichthys olivaceus in the Surf Zone of a Sandy Beach at Doigahama, Yamaguchi Prefecture, Western Japan

Creators Suda Yusuke

Creators Murase Noboru

Creators Fujita Tsuyoshi

Creators Takeuchi Tamio

The occurrence of Japanese flounder Paralichthys olivaceus and the characteristics of its habitat in the surf zone of a sandy shore at Doigahama, Yamaguchi Prefecture, western Japan, were described. Morphodynamic states of the beach were found reflective in the northern, intermediate in the central and dissipative in the southern areas, respectively. A total of 453 individuals ranging from 12 mm to 164 mm in total length except one of 222 mm were collected by beach seine hauls using the YS surfnet from the surf zone of Doigahama from 1996 to 2008. The juveniles just after settlement occurred in the surf zone firstly in April. Thereafter, their total length reached about 100 mm in October, 120-150 mm in December. Significantly more individuals per haul was caught at low tide than high tide in both day and night.

[ISSN]0370-9361