出版社：Government of Western Australia / Department of Fisheries
摘要：The moult cycle of mature female Panulirus cygnus George was examined from data recorded
over 32 years at four sites along the coast of Western Australia. A repeating trend for mature
females was inferred from samples taken between 15 November and 15 August. Setae were
present on the endopodites of all large females from June until February¨CMarch; between
March and June the proportions of females with setae declined sharply as about 80% moulted
into a non-setose phase. Females that did not undergo this moult in February remained setose
throughout the ¡°normal¡± non-setose period before moulting and producing a new set of setae
by mid winter. New or eroded spermatophores were present on most large females between
November and January, but their presence declined sharply during the February/March moult to
be absent by May. The percentage of mature females that bypassed the non-setose moult varied
markedly from 1 to 40%, and was well correlated with mean water temperatures in January/
February. The proportion that did not undergo a moult increased when these months were cool
and decreased when they were warm. The size (carapace width) at which females carry two
batches of eggs in one breeding season (double breeder) declined progressively from 96.6 to
84.1 mm with decreasing latitude (32¡ãS to 28¡ãS) and further declined at the offshore Abrolhos
Islands (29°S) to 78.7 mm. The implications of these findings are discussed in relation to
management measures designed to protect females in a setose condition.
关键词：Panulirus cygnus, double breeding, moult cycle, water temperature
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