Environmental Biology of Fishes

, Volume 66, Issue 2, pp 155–167 | Cite as

Distribution and biology of Galaxias truttaceus (Galaxiidae) in south-western Australia, including first evidence of parasitism of fishes in Western Australia by Ligula intestinalis (Cestoda)

  • David Lloyd Morgan


The freshwater trout minnow, Galaxias truttaceus, is restricted to the small catchments of the Goodga and Kalgan Rivers in Western Australia. Its large geographic separation from populations in south-eastern Australia, and subsequent reproductive isolation and variation in the prevailing environmental conditions, has created marked differences in biology (and morphology) between the eastern and western populations of G. truttaceus. The biology (spawning period, longevity, growth rates, diet and parasitism) of G. truttaceus in the Goodga River is described and then compared with information on the biology of diadromous and landlocked populations in south-eastern Australia (i.e. Tasmania) (see Humphries 1989). In the Goodga River, ca. 34 and 8% of males and females, respectively, attain maturity at the end of their first year, while only four mature males and one mature female 0+ fish were found in the Tasmanian populations. Adults migrate upstream prior to spawning which peaks during April and May. Larvae, which hatch at ca. 6.5 mm (cf. 7.5–9.0 mm in Tasmania), move downstream into Moates Lake for a few months before re-entering the river. Of the 810 G. truttaceus collected, ca. 53, 34, 10, 2, 1, 0.2 and 0.1% belonged to the 0+, 1+, 2+, 3+, 4+, 5+ and 7+ age classes, respectively. In contrast, the Tasmanian populations have a much higher proportion of older fish. At the end of their first, second and third years, the males on average attain 60, 84 and 95 mm total length (TL), respectively, whereas females attain 63, 89 and 103 mm TL, respectively at those ages. Only one fish > 140 mm TL was captured, which contrasts with the Tasmanian fish, where a substantial proportion are > 140 mm TL. The diet of fish > 40 mm TL consisted of between 65 and 96% terrestrial fauna (mainly coleopterans and hymenopterans) in the different seasons. Larval fish diets were largely comprised of copepods.

The occurrence of the introduced cestode Ligula intestinalis in ca. 7% of G. truttaceus represents the first record of this parasite in Western Australia. It was found to cause gonadal retardation and gross morphological deformities, the latter of which possibly increases the risk of avian predation.

trout minnow spotted galaxias Goodga River Moates Lake age growth reproductive biology diet 


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References cited

  1. Allen, G.R. 1982. A Field Guide to Inland Fishes of Western Australia. Western Australian Museum, Perth. 92 pp.Google Scholar
  2. Allen, G.R. 1989. Freshwater Fishes of Australia. T.F.H. Publications, Neptune City. 240 pp.Google Scholar
  3. Ault, T. & R. White. 1994. Effects of habitat structure and the presence of brown trout on the population density of Galaxias truttaceus in Tasmania, Australia. Trans. Amer. Fish. Soc. 123: 939-949.Google Scholar
  4. Cadwallader, P.L. & A.K. Eden. 1982. Observations on the food of rainbow trout, Salmo gairdneri Richardson, in Lake Purrumbete, Victoria. Bull. Aust. Soc. Lim. 8: 17-21.Google Scholar
  5. Chubb, J.C., D.W. Pool & C.J. Veltkamp. 1987. A key to the species of cestodes (tapeworms) parasitic in British and Irish freshwater fishes. J. Fish Biol. 31: 517-543.Google Scholar
  6. Cooper, A.R. 1918. North American pseudophyllidean cestodes from fishes. Illinois Biol. Monog. 4: 1-243.Google Scholar
  7. Gallucci, V.F. & T.J. Quinn. 1979. Reparameterizing, fitting and testing a simple growth model. Trans. Amer. Fish. Soc. 108: 14-25.Google Scholar
  8. Gill, H.S. & D.L. Morgan. 1998. Larval development of Nannatherina balstoni Regan (Nannopercidae), with a description of ontogenetic changes in diet. Ecol. Freshw. Fish 27: 1-9.Google Scholar
  9. Gill, H.S. & I.C. Potter. 1993. Spatial segregation amongst goby species within an Australian estuary, with a comparison of the diets and salinity tolerance of the two most abundant species. Mar. Biol. 117: 515-526.Google Scholar
  10. Hewitt, M.A. 1992. The biology of the south-west Australian catfish Tandanus bostocki Whitley (Plotosidae). B.Sc. (Hons) thesis. Murdoch University, Perth Western Australia. 48 pp.Google Scholar
  11. Hodgkin, E.P. & R. Clark. 1988. Beaufort Inlet and Gordon Inlet. Estuaries of the Jerramungup Shire. Estuarine Studies Series No. 4. Environmental Protection Agency Western Australia, Perth.Google Scholar
  12. Hodgkin, E.P. & R. Clark. 1989. Estuaries of the Shire of Ravensthorpe and the Fitzgerald National Park. Estuarine Studies Series No. 7. Environmental Protection Agency Western Australia, Perth.Google Scholar
  13. Humphries, P. 1989. Variation in the life history of diadromous and landlocked populations of the spotted galaxias, Galaxias truttaceus Valenciennes, in Tasmania. Aust. J. Mar. Freshw. Res. 40: 501-518.Google Scholar
  14. Humphries, P. 1990. Morphological variation in diadromous and landlocked populations of the spotted galaxias, Galaxias truttaceus, inTasmania, southeastern Australia. Env. Biol. Fish. 27: 97-105.Google Scholar
  15. Hynes, H.B.N. 1950. The food of sticklebacks with a review of the methods used in studies of the food of fishes. J. Anim. Ecol. 19: 36-58.Google Scholar
  16. Laevastu, T. 1965. Manual of Methods in Fisheries Biology. FAO, Rome. 51 pp.Google Scholar
  17. Lenanton, R.C.J. 1974. Fish and crustacea of the Western Australian south coast rivers and estuaries. Fish. Res. Bull. 13: 2-16.Google Scholar
  18. McDowall, R.M. & R.S. Frankenberg. 1981. The galaxiid fishes of Australia (Pisces: Galaxiidae). Rec. Aust. Mus. 33: 443-605.Google Scholar
  19. Morgan, D.L., H.S. Gill & I.C. Potter. 1995. Life cycle, growth and diet of Balston's pygmy perch in its natural habitat of acidic pools. J. Fish Biol. 47: 808-825.Google Scholar
  20. Morgan, D.L., H.S. Gill & I.C. Potter. 1998. Distribution, identification and biology of freshwater fishes in southwestern Australia. Rec. West. Aust. Mus. Supplement No. 56: 97 pp.Google Scholar
  21. Morgan, D.L., H.S. Gill & I.C. Potter. 2000. Age composition, growth and reproductive biology of the salamanderfish Lepidogalaxias salamandroides: A re-examination. Env. Biol. Fish. 57: 191-204.Google Scholar
  22. Owen, R.W. & C. Arme. 1965. Some observations on the distribution of Ligula plerocercoids in British freshwater fishes. Parasit. 55: 1-6.Google Scholar
  23. Pen, L.J. & I.C. Potter. 1990. Biology of the nightfish, Bostockia porosa Castelnau, in south-western Australia. Aust. J. Mar. Freshw. Res. 41: 627-645.Google Scholar
  24. Pen, L.J. & I.C. Potter. 1991a. Biology of the western minnow, Galaxias occidentalis Ogilby (Teleostei: Galaxiidae), in a south-western Australian river. 1. Reproductive biology. Hydrobiol. 211: 77-88.Google Scholar
  25. Pen, L.J. & I.C. Potter. 1991b. The biology of the western pygmy perch, Edelia vittata, and comparisons with two other teleost species endemic to south-western Australia. Env. Biol. Fish. 31: 365-380.Google Scholar
  26. Pen, L.J., I.C. Potter & R.W. Hilliard. 1991. Biology of Galaxiella munda McDowall (Teleostei: Galaxiidae), including a comparison of the reproductive strategies of this and three other local species. J. Fish Biol. 39: 717-731.Google Scholar
  27. Pen, L.J., H.S. Gill, I.C. Potter & P. Humphries. 1993. Growth, age composition, reproductive biology and diet of the black-stripe minnow Galaxiella nigrostriata (Shipway), including comparisons with the other two Galaxiella species. J. Fish Biol. 43: 847-863.Google Scholar
  28. Pollard, D.A. 1973. The biology of a landlocked form of the normally catadromous salmoniform fish Galaxias maculatus (Jenyns) V. Composition of the diet. Aust. J. Mar. Freshw. Res. 24: 281-295.Google Scholar
  29. Pollard, D.A. 1974. The biology of a landlocked form of the normally catadromous salmoniform fish Galaxias maculatus (Jenyns) VI. Effects of cestode and nematode parasites. Aust. J. Mar. Freshw. Res. 25: 105-120.Google Scholar
  30. Pusey, B.J. & S.D. Bradshaw. 1996. Diet and dietary overlap in fishes of temporary waters of southwestern Australia. Ecol. Freshw. Fish 5: 183-194.Google Scholar
  31. SPSS Inc. 1988. SPSS-X− User's Guide. SPSS Inc.. Chicago. 1072 pp.Google Scholar
  32. Weeks, P.J. & B.P. Penlington. 1986. First record of Ligula intestinalis (Cestoda) in rainbow trout, Salmo gairdneri, and common bully, Gobiomorphus cotidianus, in New Zealand. J. Fish Biol. 28: 183-190.Google Scholar

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • David Lloyd Morgan
    • 1
  1. 1.Centre for Fish & Fisheries Research, School of Biological Sciences and BiotechnologyMurdoch University, MurdochWestern Australia

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