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2. 2). It remains there until the female is ready to spawn her eggs. Life history cycle. It is known in the industry as a tarspot. Between September and February the female lobsters generally release their eggs. The western rock lobster is one of the family of ‘spiny’ lobsters, colourful and protected by a strong carapace. The Western Rock Lobster fishery is the most valued single-species fishery in Australia and represents about twenty per cent of the total Australian fisheries. They also release the sperm by scratching the tarspot. Western rock lobster life-cycle and habitat use The western rock lobster has a complex, spatially segregated life-cycle that includes an oceanic larval phase followed by a much longer benthic phase (Fig. They are sometimes called ‘crayfish’ or ‘crays’. The male attaches a packet of sperm, known as a ‘tarspot’, to the underside of the female. The Eastern Rock Lobster lives in coastal waters and oceans to a depth of 200 m. Distribution.
Its scientific name is Panulirus cygnus. Australia and the southern coast of Western Australia. But up in Cervantes, just 2.5 hours north of Perth, the Western Rock Lobster is as iconic as Queensland’s Big Banana, New South Wales’ Big Prawn, or South Australia’s Big Orange. Mating: Lobsters mate in late winter/spring whereby the male deposits a packet of sperm (black spot) on the underside of the female’s belly. The Western Rock Lobster fishery is now under a quota management system, where commercial fishers have a total catch allocation for the season. Western Rock Lobster are sometimes called ‘crayfish’ or ‘crays’ however they are actually very different! Besides size, the major difference between lobsters and crayfish is that lobsters live in saltwater, such as oceans and seas, while crayfish live in freshwater, including lakes, rivers, streams and ponds. The life cycle of the western rock lobster consists of six main components. In the northern waters near Kalbarri and at the Abrolhos Islands, they mature at smaller sizes, usually at about 70 millimetres carapace length, owing to the relatively warmer water. Western rock lobsters mature at 6 to7 years of age and mate in August – September. The only other place they are found in the world is in New Zealand although there are many other species of rock lobsters around the world in both tropical and cooler waters. Also New Zealand. The species is the target of WA’s largest and most valuable fishery. Western rock lobster Panulirus cygnus In the southern areas of its distribution, western rock lobster mature at six to seven years old, at a carapace length of about 90 millimetres.
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