Hormone-induced spawning of the Australian freshwater fish Murray cod, Maccullochella peeli (Mitchell) (Percichthyidae)

Rowland, Stuart J.

doi:10.1016/0044-8486(88)90121-4

Cited by 63 publications

(80 citation statements)

References 23 publications

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“…Overfishing contributed to a decline between the late 1800s and the 1930s, but the reduced frequency, extent and duration of spring flooding in the MurrayDarling river system, caused by the construction of dams, high-level weirs and levee banks, has adversely affected larval recruitment in M. peelii. This has contributed substantially to the dramatic decline in abundance of Cod during the 1950s and the maintenance of stocks at relatively low levels over the last 25 years (Rowland 1989). (Photo courtesy of Stuart Rowland who acknowledges Ray Gregg for initially providing the photograph.…”

Section: Discussionmentioning

confidence: 99%

“…The available data on the catch of native fish (predominandy Murray Cod, the remainder being Golden Perch) from the inland waters between 1883 and 1938 indicate that although large fluctuations of fish populations occurred in the Murray-Darling river system, there had been a gradual decline in the overall catch from a peak in 1918. By the mid 1930s it was apparent that the commercial fishery had declined to an unprofitable level for the large-scale operators (Rowland 1989). (Photo courtesy of Stuart Rowland, and to Ray Gregg of Wentworth who originally supplied the photo.…”

Section: Discussionmentioning

confidence: 99%

“…Total catch data for the period 1940 to 1984 illustrate declines for Murray Cod Maccullochella peeli starting in the early 1960s (Rowland 1989). Since 1960/61 the fishery for Murray Cod has remained in a depressed state, but the catch statistics show relatively stable levels with the exception of a small peak in 1974/75.…”

Section: Introductionmentioning

confidence: 99%

“…Since 1960/61 the fishery for Murray Cod has remained in a depressed state, but the catch statistics show relatively stable levels with the exception of a small peak in 1974/75. Rowland (1989) discussed the factors influencing the abundance of Murray Cod populations, and concluded that the reduced frequency, extent and duration of spring flooding in the Murray-Darling River system, caused by the construction of dams, high level weirs and levee banks, has adversely affected larval recruitment. Conversely the percentage of total catch attributable to Carp Cyprinvs carpio has increased significandy, and by the 1980s carp was the dominant species in the commercial catch (Cadwallader 1985).…”

Section: Introductionmentioning

confidence: 99%

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Future of the Fauna of Western New South Wales

Lunney¹

1994

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Future of the Fauna of Western New South Wales

Lunney¹

1994

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“…Berra (1974), Rowland (1989), Trout cod Recovery Team (2008a), Lintermans (2007) Injury and post-release mortality of concern (2-15% mortality estimated for Murray cod).…”

Section: Irrigation Infrastructurementioning

confidence: 99%

Recovery of the endangered trout cod, Maccullochella macquariensis: what have we achieved in more than 25 years?

Koehn

Lintermans

Lyon

et al. 2013

Mar. Freshwater Res.

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Abstract. Recovery of threatened species is often necessarily a long-term process. The present paper details the progress towards the recovery of trout cod, Maccullochella macquariensis, an iconic, long-lived fish species first listed as threatened in the 1980s. The objectives, actions and progress over three successive national recovery plans (spanning 18 years) are assessed, documenting changes to population distribution and abundance and updating ecological knowledge. Increased knowledge (especially breeding biology and hatchery techniques, movements, habitats and genetics) has greatly influenced recovery actions and the use of a population model was developed to assist with management options and stocking regimes. Key recovery actions include stocking of hatchery-produced fish to establish new populations, regulations on angling (including closures), education (particularly identification from the closely related Murray cod, M. peelii) and habitat rehabilitation (especially re-instatement of structural woody habitats). In particular, the establishment of new populations using hatchery stocking has been a successful action. The importance of a coordinated long-term approach is emphasised and, although there is uncertainty in ongoing resourcing of the recovery program, much has been achieved and there is cautious optimism for the future of this species.

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The impact of cold water releases on the critical period of post-spawning survival and its implications for Murray cod (Maccullochella peelii peelii): a case study of the Mitta Mitta River, southeastern Australia

et al. 2005

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The effects of cold water releases, as a by-product of storing irrigation water in large dams, has been a source of great concern for its impact on native freshwater fish for some time. The Mitta Mitta River, northeast Victoria, is impacted by altered thermal regimes downstream of the fourth largest dam in Australia, Dartmouth dam, with some daily temperatures 10-12 C below normal. Murray cod (Maccullochella peelii peelii) were endemic to the Mitta Mitta River; however, resident Murray cod have not been found in this river since 1992. The response of eggs and hatched larvae from Murray cod to different temperature gradients of water were measured and the post-spawning survival recorded. As a case study, post-spawning survival was then inferred from flow data for each year of operation of Dartmouth Dam, recorded since first operation in 1978, and included in a stochastic population model to explore the impact of the altered (historical) thermal regime on population viability. Experimental results revealed no egg and larval survival below 13 C and predicted historical temperature regimes point to more than 15 years of low temperatures in the Mitta Mitta River. Population modelling indicates that the impact of cold water releases on post-spawning survival is a significant threatening process to the viability of a Murray cod population. Additionally, we consider changes to the thermal regime to explore how the thermal impact of large dams may be minimized on downstream fish populations through incrementally increasing the temperature of the releases. The modelled Murray cod population responds to minor increases in the thermal regime; however, threats are not completely removed until an increase of at least 5-6 C.

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Hormone-induced spawning of the Australian freshwater fish Murray cod, Maccullochella peeli (Mitchell) (Percichthyidae)

Cited by 63 publications

References 23 publications

Future of the Fauna of Western New South Wales

Future of the Fauna of Western New South Wales

Recovery of the endangered trout cod, Maccullochella macquariensis: what have we achieved in more than 25 years?

The impact of cold water releases on the critical period of post-spawning survival and its implications for Murray cod (Maccullochella peelii peelii): a case study of the Mitta Mitta River, southeastern Australia

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