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Concept
Ibacus peronii
Résumé
Ibacus peronii, the Balmain bug or butterfly fan lobster, is a species of slipper lobster. It lives in shallow waters around Australia and is the subject of small-scale fishery. It is a flattened, reddish brown animal, up to long and wide, with flattened antennae and no claws.
In common with other slipper lobsters, Ibacus peronii has a broad, flattened body and a large carapace. The carapace is reddish brown, and reaches lengths of , with the whole animal able to reach a length of , and a width of . The antennae are also long and broad, and the flattened form of the whole animal allows it to partly penetrate itself in soft substrates. They have five pairs of legs and no claws. Captured animals typically weigh around , but the weight can range from .
Female Ibacus peronii grows faster and reaches larger sizes in comparison to male Ibacus peronii. The size of female Ibacus peronii is significant because there is a linear relationship between the fecundity and the carapace length.
The species is often confused with the Moreton Bay bug, Thenus orientalis, but they can be distinguished by the placement of the eyes: the eyes of I. peronii are near the claws, while those of T. orientalis are at the margin of the legs.
It is found at depths of off the coast of Australia from Southport in Queensland to Geraldton in Western Australia. A further population exists in Western Australia from Port Hedland to Broome. A Specimen was found in Port Phillip bay in July 2016.
Ibacus peronii is nocturnal and feeds on algae and small crustaceans. They often spend the daytime buried in sand or mud.
Ibacus peronii is the most commercially important species in the genus Ibacus. Only wild-caught Ibacus peronii are available, although some research into aquaculture is ongoing. The fishery for I. peronii is focussed around New South Wales, where it is mainly caught as bycatch of trawling for fish and prawns. There is a peak in supply in January and February, and the price is highest in areas where it is caught, because of its increased familiarity and popularity there.
Source officielle
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