Pseudoambassis jacksoniensis

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Pseudoambassis jacksoniensis
AmbassisJacksoniensisRLS.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Mugiliformes
Family: Ambassidae
Genus: Pseudoambassis
Species:
P. jacksoniensis
Binomial name
Pseudoambassis jacksoniensis
Macleay, 1881
Synonyms
  • Ambassis jacksoniensis(Macleay, 1881)
  • Pseudambassis jacksoniensis(Macleay, 1881)
  • Velambassis jacksoniensis(Macleay, 1881)

Pseudoambassis jacksoniensis, commonly known as the Port Jackson glassfish or Port Jackson perchlet, is a species of fish in the family Ambassidae native to eastern Australia. It gains its common name from its transparent appearance. [1]

Contents

Taxonomy

William John Macleay described the Port Jackson glassfish as Pseudambassis jacksoniensis in 1881 from a specimen collected in Port Jackson, noting that the length was three and a third times the fishes' height. [2] The species name relates to the location it was described. [1] It was classified in the new genus Velambassis by Gilbert Whitley in 1935, on the basis of having weaker dorsal spines than other members of the family. [3] Allen and Burgess found no reason for the species not to be in the genus Ambassis and reassigned it there in 1990. [4] These moves were reverted with the revalidation of Pseudoambassis in 2023. [5]

This species and the co-occurring estuary glassfish ( A. marianus ) are the only two members of the genus found in temperate waters. The others are found in the waters of northern Australia and southeast Asia. [4]

Description

Reaching a standard length of 7 cm (2+3⁄4 in), the Port Jackson glassfish has a silver and semi-transparent body and head covered with large cycloid scales. It has a short deeply-notched dorsal fin and forked tail fin. [1] It is slimmer than the related A. marianus—its body depth is 33 to 38% of standard length compared to the latter species' body depth of 37 to 44% of standard length. The Port Jackson glassfish also has a lateral line running the length of its body, while that of its relative is partial. [4]

Distribution and habitat

The Port Jackson glassfish is native to coastal eastern Australia, from Moreton Bay in Queensland through to Narooma in southern New South Wales. [1] It lives in estuaries and protected brackish tidal streams that have mangroves growing along the margins. [4]

Feeding

The Port Jackson glassfish feeds on zooplankton, foraging from the water surface to the substrate. [1] It is a food item of the little pied and little black cormorants. [6]

References

  1. 1 2 3 4 5 Bray, Dianne J. (2011). "Port Jackson Glassfish, Ambassis jacksoniensis (Macleay 1881)". Fishes of Australia. Museum Victoria. Archived from the original on 23 September 2018. Retrieved 26 April 2015.
  2. ↑ Macleay, William John (1881). "Descriptive catalogue of the fishes of Australia. Part 1". Proceedings of the Linnean Society of New South Wales. 5 (3): 302–444 [340]. doi:10.5962/bhl.part.15887.
  3. ↑ Whitley, Gilbert Percy (1935). "Fishes from Princess Charlotte Bay, North Queensland". Records of the South Australian Museum (Adelaide). 5 (3): 345–65.
  4. 1 2 3 4 Allen, Gerald R.; Burgess, Warren E. (1990). "A review of the glassfishes (Chandidae) of Australia and New Guinea" (PDF). Records of the Western Australian Museum. 34: 139–206 [167–69].
  5. ↑ Siti Zafirah Ghazali; Sébastien Lavoué; Tedjo Sukmono; Ahasan Habib; Min Pau Tan; Siti Azizah Mohd Nor (September 2023). "Cenozoic colonisation of the Indian Ocean region by the Australian freshwater-originating glassperch family Ambassidae (Teleostei)" (PDF). Molecular Phylogenetics and Evolution. 186.
  6. ↑ Barker, Robin; Vestjens, Wilhelmus (1989). Food of Australian Birds 1. Non-passerines. CSIRO Publishing. pp. 75, 77. ISBN   9780643102965.
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