Growth and
spawning of hatchery-reared Chinese white prawn Penaeus (Fenneropenaeus)
chinensis released in the Ariake Sea, Japan
N. Nakashima, M. Minagawa, S. Ito-2000
Fisheries Science, 66 (6): 1087-1091
(from Current Contents)
Abstract :
Growth and reproduction of hatchery-reared Chinese
white prawn Penaeus chinensis released in the Ariake Sea, Japan, were
examined. Chinese white prawn grew rapidly, reaching a body length of 154 mm
in males and 198 mm in females by November (219-229 days after hatching).
Maximum body length of sampled individuals was 164 mm in males and 223 mm in
females. Growth curve of the Chinese white prawn was fitted to the Pitcher
and MacDonald's formula, L-t = 155.0{1 - e(2.925sin[2 pi
(t-16.151)/365]-0.0623(t-10.712))} for males and the logistic curve, L-t =
200.3/[1 + e((1.985-0.0341t))] for females (where L-t is the body length t
days after release and t is the number of days after release). Females
reached sexual maturity in late February and spawning occurred until April.
Minimum size at ripe and spawned stages was 189 mm and 193 mm body length,
respectively.
(Seikai Natl Fisheries Res Inst, Ishigaki Trop Stn,
Okinawa 9070451, Japan, e-mail of M. Minagawa: minagawa@snf-its.affrc.go.jp)