Reintroduction success of threatened Australian trout cod (Maccullochella macquariensis) based on growth and reproduction

Jarod P. Lyon, Charles Todd, Simon J. Nicol, Alasdair MacDonald, Daniel Stoessel, Brett A. Ingram, Richard J. Barker, Corey J A Bradshaw

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Internationally, re-introductions of endangered species into their former ranges have largely failed. Here we assess a successful reintroduction program of the endangered trout cod (Maccullochella macquariensis) and examine factors contributing to this success. Stocking of marked fish (all stocked fish were marked) occurred between 1997 and 2006 in the Ovens River, south-eastern Australia, where trout cod were historically abundant but locally extinct by the 1980s. We found no natural recruits (i.e. from spawnings of stocked fish in the wild) over the age of six, indicating that natural recruitment started at most five years after stocking began. Of the 83 fish we examined for sexual maturity, 12 were immature, 20 were male, and 51 were female. The body length at which 50% of the population can be considered mature was 325 and 250mm for females and males, respectively. The length at which 90% of the population was mature was 394 and 318mm for females and males, respectively. The smallest mature female was 245mm. Average relative fertility was 9 eggs g-1 fish weight. The results we obtained provide valuable insights into the aspects contributing to the success of reintroduction programs for endangered freshwater species.

Original languageEnglish
Pages (from-to)598-605
Number of pages8
JournalMarine and Freshwater Research
Volume63
Issue number7
DOIs
Publication statusPublished - 10 Jul 2012
Externally publishedYes

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reintroduction
fish
fish roe
wild fish
ovens
sexual maturity
endangered species
body length
spawning
immatures
fertility
rivers
Maccullochella macquariensis
egg
river
programme
stocking

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Lyon, J. P., Todd, C., Nicol, S. J., MacDonald, A., Stoessel, D., Ingram, B. A., ... Bradshaw, C. J. A. (2012). Reintroduction success of threatened Australian trout cod (Maccullochella macquariensis) based on growth and reproduction. Marine and Freshwater Research, 63(7), 598-605. https://doi.org/10.1071/MF12034
Lyon, Jarod P. ; Todd, Charles ; Nicol, Simon J. ; MacDonald, Alasdair ; Stoessel, Daniel ; Ingram, Brett A. ; Barker, Richard J. ; Bradshaw, Corey J A. / Reintroduction success of threatened Australian trout cod (Maccullochella macquariensis) based on growth and reproduction. In: Marine and Freshwater Research. 2012 ; Vol. 63, No. 7. pp. 598-605.
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Lyon, JP, Todd, C, Nicol, SJ, MacDonald, A, Stoessel, D, Ingram, BA, Barker, RJ & Bradshaw, CJA 2012, 'Reintroduction success of threatened Australian trout cod (Maccullochella macquariensis) based on growth and reproduction', Marine and Freshwater Research, vol. 63, no. 7, pp. 598-605. https://doi.org/10.1071/MF12034

Reintroduction success of threatened Australian trout cod (Maccullochella macquariensis) based on growth and reproduction. / Lyon, Jarod P.; Todd, Charles; Nicol, Simon J.; MacDonald, Alasdair; Stoessel, Daniel; Ingram, Brett A.; Barker, Richard J.; Bradshaw, Corey J A.

In: Marine and Freshwater Research, Vol. 63, No. 7, 10.07.2012, p. 598-605.

Research output: Contribution to journalArticle

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