See the Supplementary Materialfor a map of the known range of I. australe.
Habitat and Ecology
A similar species from eastern Australia, Idiotropiscis lumnitzeri (Syndneys Pygmy Pipehorse), is known to occupy semi-exposed rocky reefs from 630 m, sparsely covered with clumps of Rhodophytes which provide good camouflage for the species (Kuiter 2004). Individual animals have been observed to occupy the same small sections of reef for up to eight months at a time (Kuiter 2004), suggesting that I. lumnitzeri, and perhaps also A. australe, may be site faithful.
Life History and Behavior
IUCN Red List Assessment
Red List Category
Red List Criteria
Acentronura (Idiotropiscis) australe is a male pouch brooder and, like some other syngnathid species, may have a low reproductive rate compared to other teleosts (Foster and Vincent 2004). This is supported by the fact that two male specimens collected near Carnac Island carried broods of 10 and 80 eggs (Kendrick, unpublished data). It is not known how widely the young of A. australe disperse, nor whether this brooding species may be particularly susceptible to localized extinction.
2. No Australian Society for Fish Biology listing.
3. This species may occur in the Marmion and Shoalwater Islands Marine Parks, which are located some kilometers from Carnac Island in Western Australia.
Southern little pipehorse
The southern little pipehorse (Idiotropiscis australe) is a species of fish in the Syngnathidae family. It is endemic to Australia. Its natural habitats are open seas, shallow seas, subtidal aquatic beds, and coral reefs. It camouflages amongst species of red algae. It is threatened by habitat loss.
- Kendrick, A.J. & Morgan, S.K. (2006). "Idiotropiscis australe". IUCN Red List of Threatened Species. Version 2012.1. International Union for Conservation of Nature. Retrieved 7 May 2013.
- Froese, Rainer and Pauly, Daniel, eds. (2013). "Idiotropiscis australe" in FishBase. May 2013 version.
- Dianne J. Bray & Vanessa J. Thompson, 2011, Southern Pygmy Pipehorse, Idiotropiscis australe, in Fishes of Australia, accessed 16 Oct 2014, http://www.fishesofaustralia.net.au/home/species/4424
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