Species Kathetostoma canaster

Common name: Speckled stargazer

Previous nomenclature: Kathetostoma sp.1 in Last et al. 1983

Material

Description based on otoliths of four specimens. Specimens 1-3 of 150-360 mm TL. Otolith catalogue reference 30.92P1-3. Catch locality Stanley, Bass Strait, Tasmania. ID by RG. Specimen 4 of 533 mm TL. Otolith catalogue reference DMF8-9. Catch locality Point Hicks, Victoria, 200 m depth. ID by DMF.

Otolith description

Otolith large, oval to ovate. Dorsal margin slightly rounded, irregular to crenate; ventral margin rounded and irregular; posterior margin blunt and irregular. Distal surface flat; proximal surface flat to mildly concave. Sulcus groove near homosulcoid; opening ostial. Cauda with slight ventral curve at posterior end. Colliculum heteromorph. Collum absent or indistinct. Crista superior over cauda only, gently rounded and indistinct to raised and irregular; crista inferior more developed and irregular, as an enfolding ridge. Rostrum short and rounded. Antirostrum small and rounded. Excisura absent, but shallow notch present with acute angle. Primordium central.

Morphometry

TL = 138.517 OW 0289 mm n = 8; Std Err Est = 0.058; R = 0.655; P<0.078 Otolith weight range = 79.0-124.0 mg (CMAR)

Mass = 2.922 x 10-6 TL 3323 g n = 27; Std Err Est = 0.522; R = 0.893; P<0.001; Fish length range = 150-580 mm TL (CMAR)

Distribution and ecology

New South Wales to southern Western Australia, and Tasmania; in 30-700 m depth; reaches 650 mm in length (Gomon et al. 1994, May and Maxwell 1986).

Predator-prey information

Undistinguished species of this Family are known prey of Australian fur seal (Arctocephalus pusillus doriferus) (Hume et al. 2004).

Otolith of Kathetostoma canaster from a fish of 533 mm TL
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