期刊
NEW ZEALAND JOURNAL OF MARINE AND FRESHWATER RESEARCH
卷 39, 期 2, 页码 287-292出版社
RSNZ PUBLISHING
DOI: 10.1080/00288330.2005.9517308
关键词
Bay lobster; Thenus; photoperiod; moult stage; moult increment
Bay lobster, Thenus orientalis, locally known as Moreton Bay bug, is being investigated for aquaculture, and controlling the moulting process is critical to success in the production of softshell animals. Identification of moult stages is possible because of the existence of exoskeleton ecdysial sutures (crack lines) on the gill chambers. The timing of moulting is synchronised and occurs around sunset when animals are under a natural day-night condition. The timing and synchrony of moulting can be manipulated by altering the day-night cycle, whereas the length of the actual moult stage can be shortened/prolonged by manipulating temperature. During the intermoult stage for juveniles (average weight 79 g), body weight increases only by 9%, whereas the majority of weight gain (an additional 44%) occurs within the short period just before and after the actual moult stage. These findings have application for the development of softshell products, which can be harvested at around the actual moult stage.
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