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Advances in the aquatic sciences
RESEARCH ARTICLE (Open Access)

Ecohydraulic model for designing environmental flows supports recovery of imperilled Murray cod (Maccullochella peelii) in the Lower Darling–Baaka River following catastrophic fish kills

Ivor G. Stuart https://orcid.org/0000-0002-4191-6467 A D and Clayton P. Sharpe B C
+ Author Affiliations
- Author Affiliations

A Kingfisher Research, 177 Progress Road, Eltham, Vic. 3095, Australia.

B CPS Enviro, 972 Irymple Avenue, Irymple, Vic. 3498, Australia.

C Present address: New South Wales National Parks & Wildlife Service, PO Box 363, Buronga, NSW 2730, Australia.

D Corresponding author. Present address: Arthur Rylah Institute for Environmental Research, 123 Brown Street, Heidelberg, Vic. 3084, Australia. Email: ivor.stuart@delwp.vic.gov.au

Marine and Freshwater Research 73(2) 247-258 https://doi.org/10.1071/MF20377
Submitted: 23 December 2020  Accepted: 20 August 2021   Published: 20 September 2021

Journal Compilation © CSIRO 2022 Open Access CC BY-NC-ND

Abstract

Large dryland and semi-arid rivers are among the world’s most heavily modified ecosystems, and the Darling–Baaka River of eastern Australia highlights the challenges in conserving such ecosystems. Since 2000, the hydrology at the downstream end of the system (the Lower Darling River, LDR) has been transformed from a naturally near-perennial flowing system to an intermittent one by increased water abstraction, prolonged drought and climate change. This hydrological change has placed immense pressure on the native fish populations, such as the imperilled Murray cod (Maccullochella peelii), as evidenced by the 2018–19 catastrophic fish kills. Here we outline an ecohydraulic conceptual model for designing environmental flows to support spawning and recruitment of Murray cod. An environmental flow based on this model was released in 2016–17, following 524 consecutive days of continuous zero flows. The LDR flow consisted of an increased discharge in late winter–spring to promote broad-scale lotic (i.e. >0.3 m s–1) conditions, hydraulic complexity and continuous base flows to maintain connectivity and water quality. Monitoring of Murray cod during and following the flow revealed successful spawning and recruitment. This finding is significant because it provides justification for altering current water management policies that are failing to protect this nationally significant ecosystem.

Keywords: Australia, Murray–Darling Basin, recovery, recruitment, river regulation.


References

Acreman, M., Arthington, A. H., Colloff, M. J., Couch, C., Crossman, N. D., Dyer, F., Overton, I., Pollino, C. A., Stewardson, M. J., and Young, W. (2014). Environmental flows for natural, hybrid, and novel riverine ecosystems in a changing world. Frontiers in Ecology and the Environment 12, 466–473.
Environmental flows for natural, hybrid, and novel riverine ecosystems in a changing world.Crossref | GoogleScholarGoogle Scholar |

Anderson, J. R., Morison, A. K., and Ray, D. J. (1992). Age and growth of Murray cod, Maccullochella peelii (Perciformes: Percichthyidae), in the lower Murray–Darling Basin, Australia, from thin-sectioned otoliths. Marine and Freshwater Research 43, 983–1013.
Age and growth of Murray cod, Maccullochella peelii (Perciformes: Percichthyidae), in the lower Murray–Darling Basin, Australia, from thin-sectioned otoliths.Crossref | GoogleScholarGoogle Scholar |

Archdeacon, T. P., and Reale, J. K. (2020). No quarter: lack of refuge during flow intermittency results in catastrophic mortality of an imperiled minnow. Freshwater Biology 65, 2108–2123.
No quarter: lack of refuge during flow intermittency results in catastrophic mortality of an imperiled minnow.Crossref | GoogleScholarGoogle Scholar |

Arthington, A. H., and Balcombe, S. R. (2011). Extreme flow variability and the ‘boom and bust’ ecology of fish in arid-zone floodplain rivers: a case history with implications for environmental flows, conservation and management. Ecohydrology 4, 708–720.
Extreme flow variability and the ‘boom and bust’ ecology of fish in arid-zone floodplain rivers: a case history with implications for environmental flows, conservation and management.Crossref | GoogleScholarGoogle Scholar |

Australian Academy of Science (2019). Investigation of the causes of mass fish kills in the Menindee Region NSW over the summer of 2018–2019. (AAS: Canberra, ACT, Australia.) Available at https://www.science.org.au/supporting-science/science-policy-and-sector-analysis/reports-and publications/fish-kills-report

Bestgen, K. R., Poff, N. L., Baker, D. W., Bledsoe, B. P., Merritt, D. M., Lorie, M., Auble, G. T., Sanderson, J. S., and Kondratieff, B. C. (2020). Designing flows to enhance ecosystem functioning in heavily altered rivers. Ecological Applications 30, e02005.
Designing flows to enhance ecosystem functioning in heavily altered rivers.Crossref | GoogleScholarGoogle Scholar | 31532056PubMed |

Boulton, A. J. (2003). Parallels and contrasts in the effects of drought on stream macroinvertebrate assemblages. Freshwater Biology 48, 1173–1185.
Parallels and contrasts in the effects of drought on stream macroinvertebrate assemblages.Crossref | GoogleScholarGoogle Scholar |

Brierley, G., Tadaki, M., Hikuroa, D., Blue, B., Šunde, C., Tunnicliffe, J., and Salmond, A. (2019). A geomorphic perspective on the rights of the river in Aotearoa New Zealand. River Research and Applications 35, 1640–1651.
A geomorphic perspective on the rights of the river in Aotearoa New Zealand.Crossref | GoogleScholarGoogle Scholar |

Butler, G. L., and Rowland, S. J. (2009). Using underwater cameras to describe the reproductive behaviour of the endangered eastern freshwater cod Maccullochella ikei. Ecology Freshwater Fish 18, 337–349.
Using underwater cameras to describe the reproductive behaviour of the endangered eastern freshwater cod Maccullochella ikei.Crossref | GoogleScholarGoogle Scholar |

Couch, A. J., Dyer, F., and Lintermans, M. (2020). Multi-year pair-bonding in Murray cod (Maccullochella peelii). PeerJ 8, e10460.
Multi-year pair-bonding in Murray cod (Maccullochella peelii).Crossref | GoogleScholarGoogle Scholar | 33354425PubMed |

Davies, P. E., Harris, J. H., Hillman, T. J., and Walker, K. F. (2010). The Sustainable Rivers Audit: assessing river ecosystem health in the Murray–Darling Basin, Australia. Marine and Freshwater Research 61, 764–777.
The Sustainable Rivers Audit: assessing river ecosystem health in the Murray–Darling Basin, Australia.Crossref | GoogleScholarGoogle Scholar |

Ellis, I., and Meredith, S. (2004). Guidelines for future release effects on Lower Darling River fish deaths. Consultancy report for NSW Department of Infrastructure, Planning and Natural Resources. Murray–Darling Freshwater Research Centre, Mildura, Vic., Australia.

Ellis, I., Bates, W., Martin, S., McCrabb, G., Koehn, J., Heath, P., and Hardman, D. (2021). How fish kills affected traditional (Baakandji) and non-traditional communities on the Lower Darling–Baaka River. Marine and Freshwater Research , .
How fish kills affected traditional (Baakandji) and non-traditional communities on the Lower Darling–Baaka River.Crossref | GoogleScholarGoogle Scholar |

Forbes, J., Watts, R. J., Robinson, W. A., Baumgartner, L. J., McGuffie, P., Cameron, L. M., and Crook, D. A. (2016). Assessment of stocking effectiveness for Murray cod (Maccullochella peelii) and golden perch (Macquaria ambigua) in rivers and impoundments of south-eastern Australia. Marine and Freshwater Research 67, 1410–1419.
Assessment of stocking effectiveness for Murray cod (Maccullochella peelii) and golden perch (Macquaria ambigua) in rivers and impoundments of south-eastern Australia.Crossref | GoogleScholarGoogle Scholar |

Gido, K. B., Propst, D. L., Olden, J. D., and Bestgen, K. R. (2013). Multidecadal responses of native and introduced fishes to natural and altered flow regimes in the American Southwest. Canadian Journal of Fisheries and Aquatic Sciences 70, 554–564.
Multidecadal responses of native and introduced fishes to natural and altered flow regimes in the American Southwest.Crossref | GoogleScholarGoogle Scholar |

Grabowski, T. B., and Isely, J. J. (2007). Effects of flow fluctuations on the spawning habitat of a riverine fish. Southeastern Naturalist 6, 471–478.
Effects of flow fluctuations on the spawning habitat of a riverine fish.Crossref | GoogleScholarGoogle Scholar |

Grill, G., Lehner, B., Thieme, M., Geenen, B., Tickner, D., Antonelli, F., Babu, S., Borrelli, P., Cheng, L., Crochetiere, H., and Macedo, H. E. (2019). Mapping the world’s free-flowing rivers. Nature 569, 215–221.
Mapping the world’s free-flowing rivers.Crossref | GoogleScholarGoogle Scholar | 31068722PubMed |

He, F., Zarfl, C., Bremerich, V., David, J. N., Hogan, Z., Kalinkat, G., Tockner, K., and Jähnig, S. C. (2019). The global decline of freshwater megafauna. Global Change Biology 25, 3883–3892.
The global decline of freshwater megafauna.Crossref | GoogleScholarGoogle Scholar | 31393076PubMed |

Jackson, S., and Head, L. (2020). Australia’s mass fish kills as a crisis of modern water: understanding hydrosocial change in the Murray–Darling Basin. Geoforum 109, 44–56.
Australia’s mass fish kills as a crisis of modern water: understanding hydrosocial change in the Murray–Darling Basin.Crossref | GoogleScholarGoogle Scholar |

Jenkins, K. M., and Boulton, A. J. (2003). Connectivity in a dryland river: short-term aquatic microinvertebrate recruitment following floodplain inundation. Ecology 84, 2708–2723.
Connectivity in a dryland river: short-term aquatic microinvertebrate recruitment following floodplain inundation.Crossref | GoogleScholarGoogle Scholar |

Jones, M. J., and Stuart, I. G. (2007). Movements and habitat use of common carp (Cyprinus carpio) and Murray cod (Maccullochella peelii peelii) juveniles in a large lowland Australian river. Ecology Freshwater Fish 16, 210–220.
Movements and habitat use of common carp (Cyprinus carpio) and Murray cod (Maccullochella peelii peelii) juveniles in a large lowland Australian river.Crossref | GoogleScholarGoogle Scholar |

King, J., and Brown, C. (2006). Environmental flows: striking the balance between development and resource protection. Ecology and Society 11, art26.
Environmental flows: striking the balance between development and resource protection.Crossref | GoogleScholarGoogle Scholar |

King, A. J., Tonkin, Z., and Mahoney, J. (2009). Environmental flows enhance native fish spawning and recruitment in the Murray River, Australia. River Research and Applications 25, 1205–1218.
Environmental flows enhance native fish spawning and recruitment in the Murray River, Australia.Crossref | GoogleScholarGoogle Scholar |

Kingsford, R. T. (2000). Ecological impacts of dams, water diversions and river management on floodplain wetlands in Australia. Austral Ecology 25, 109–127.
Ecological impacts of dams, water diversions and river management on floodplain wetlands in Australia.Crossref | GoogleScholarGoogle Scholar |

Koehn, J. D. (2004). The loss of valuable Murray cod in fish kills: a science and management perspective. In ‘Management of Murray Cod in the Murray–Darling Basin, Statement, Recommendations and Supporting Papers Proceedings of a Workshop’, 3–4 June 2004, Canberra, ACT, Australia. (Eds M. Lintermans and B. Phillips.) pp. 73–82. (Murray–Darling Basin Commission: Canberra, ACT, Australia.)

Koehn, J. D. (2009). Multi-scale habitat selection by Murray cod Maccullochella peelii peelii in two lowland rivers Journal of Fish Biology 75, 113–129.
Multi-scale habitat selection by Murray cod Maccullochella peelii peelii in two lowland riversCrossref | GoogleScholarGoogle Scholar | 20738486PubMed |

Koehn, J. D., and Harrington, D. J. (2005). Collection and distribution of the early life stages of the Murray cod (Maccullochella peelii peelii) in a regulated river. Australian Journal of Zoology 53, 137–144.
Collection and distribution of the early life stages of the Murray cod (Maccullochella peelii peelii) in a regulated river.Crossref | GoogleScholarGoogle Scholar |

Koehn, J. D., and Harrington, D. J. (2006). Environmental conditions and timing for the spawning of Murray cod (Maccullochella peelii peellii) and the endangered trout cod (M. macquariensis) in southeastern Australian rivers. River Research and Applications 22, 327–342.
Environmental conditions and timing for the spawning of Murray cod (Maccullochella peelii peellii) and the endangered trout cod (M. macquariensis) in southeastern Australian rivers.Crossref | GoogleScholarGoogle Scholar |

Koehn, J. D., Raymond, S. A., Stuart, I., Todd, C. R., Balcombe, S. R., Zampatti, B. P., Bamford, H., Ingram, B. A., Bice, C., Burndred, K., Butler, G., Baumgartner, L., Clunie, P., Ellis, I., Forbes, J., Hutchison, M., Koster, W., Lintermans, M., Lyon, J. P., Mallen-Cooper, M., McLellan, M., Pearce, L., Ryall, J., Sharpe, C., Stoessel, D. J., Thiem, J. D., Tonkin, Z., Townsend, A., and Ye, Q. (2020). A compendium of ecological knowledge for restoration of freshwater fishes in the Murray–Darling Basin. Marine and Freshwater Research 71, 1391–1463.
A compendium of ecological knowledge for restoration of freshwater fishes in the Murray–Darling Basin.Crossref | GoogleScholarGoogle Scholar |

Leblanc, M., Tweed, S., Van Dijk, A., and Timbal, B. (2012). A review of the historic and future hydrological changes in the Murray–Darling Basin. Global and Planetary Change 80–81, 226–246.
A review of the historic and future hydrological changes in the Murray–Darling Basin.Crossref | GoogleScholarGoogle Scholar |

Lieschke, J. A., Lyon, J. P., Moloney, P. D., and Nicol, S. J. (2016). Spatial partitioning in the use of structural woody habitat supports the cohabitation of two cod species in a large lowland river. Marine and Freshwater Research 67, 1835–1843.
Spatial partitioning in the use of structural woody habitat supports the cohabitation of two cod species in a large lowland river.Crossref | GoogleScholarGoogle Scholar |

Lyon, J. P., and O’Connor, J. P. (2008). Smoke on the water: can riverine fish populations recover following a catastrophic fire-related sediment slug? Austral Ecology 33, 794–806.
Smoke on the water: can riverine fish populations recover following a catastrophic fire-related sediment slug?Crossref | GoogleScholarGoogle Scholar |

Lyon, J. P., Bird, T., Tonkin, Z., Raymond, S., Sharley, J., and Hale, R. (2021). Does life history mediate the effects of discharge as a driver of multi-decadal changes in population abundance and size structure of freshwater fish? Ecological Applications , e02430.
Does life history mediate the effects of discharge as a driver of multi-decadal changes in population abundance and size structure of freshwater fish?Crossref | GoogleScholarGoogle Scholar | 34309984PubMed |

Mallen-Cooper, M., and Zampatti, B. P. (2020). Restoring the ecological integrity of a dryland river: why low flows in the Barwon-Darling River must flow. Ecological Management & Restoration 21, 218–228.
Restoring the ecological integrity of a dryland river: why low flows in the Barwon-Darling River must flow.Crossref | GoogleScholarGoogle Scholar |

Moyle, P. B. (2014). Novel aquatic ecosystems: the new reality for streams in California and other Mediterranean climate regions. River Research and Applications 30, 1335–1344.
Novel aquatic ecosystems: the new reality for streams in California and other Mediterranean climate regions.Crossref | GoogleScholarGoogle Scholar |

New South Wales Department of Planning, Industry and Environment (2020). Murray–Lower Darling long-term water plan part A: Murray–Lower Darling catchment.

New South Wales Department of Primary Industries Fisheries (2020). Fish Stocking Database. Available at https://www.dpi.nsw.gov.au/fishing/recreational/resources/stocking [Verified 18 December 2020].

Nilsson, C., Reidy, C. A., Dynesius, M., and Revenga, C. (2005). Fragmentation and flow regulation of the world’s large river systems. Science 308, 405–408.
Fragmentation and flow regulation of the world’s large river systems.Crossref | GoogleScholarGoogle Scholar | 15831757PubMed |

Petriki, O., Patsia, A., Vafeiadou, A., Tekidis, I., Michalopoulou, P., Samartzi, S., Mallinis, D., and Bobori, D. C. (2021). Tracking the causes of a mass fish kill at a Mediterranean River within a protected area. Water 13, 989.
Tracking the causes of a mass fish kill at a Mediterranean River within a protected area.Crossref | GoogleScholarGoogle Scholar |

Poff, N. L., Allan, J. D., Bain, M. B., Karr, J. R., Prestegaard, K. L., Richter, B. D., Sparks, R. E., and Stromberg, J. C. (1997). The natural flow regime. Bioscience 47, 769–784.
The natural flow regime.Crossref | GoogleScholarGoogle Scholar |

Propst, D. L., Gido, K. B., and Stefferud, J. A. (2008). Natural flow regimes, nonnative fishes, and native fish persistence in arid-land river systems. Ecological Applications 18, 1236–1252.
Natural flow regimes, nonnative fishes, and native fish persistence in arid-land river systems.Crossref | GoogleScholarGoogle Scholar | 18686584PubMed |

Richter, B. D., and Thomas, G. A. (2007). Restoring environmental flows by modifying dam operations. Ecology and Society 12, art12.
Restoring environmental flows by modifying dam operations.Crossref | GoogleScholarGoogle Scholar |

Richter, B. D., Andrews, S., Dahlinghaus, R., Freckmann, G., Ganis, S., Green, J., Hardman, I., Palmer, M., and Shalvey, J. (2020). Buy me a river: purchasing water rights to restore river flows in the Western USA. Journal of the American Water Resources Association 56, 1–15.
Buy me a river: purchasing water rights to restore river flows in the Western USA.Crossref | GoogleScholarGoogle Scholar |

Rowland, S. (1988). Hormone-induced spawning of the Australian freshwater fish Murray Cod, Maccullochella peeli (Mitchell) (Percichthyidae). Aquaculture 70, 371–389.
Hormone-induced spawning of the Australian freshwater fish Murray Cod, Maccullochella peeli (Mitchell) (Percichthyidae).Crossref | GoogleScholarGoogle Scholar |

Rowland, S. (1998). Aspects of the reproductive biology of Murray cod, Maccullochella peelii peelii. Proceedings of the Linnean Society of New South Wales 120, 147–162.

Rowland, S. (2004). Overview of the history, fishery, biology and aquaculture of Murray cod (Maccullochella peelii peelii). In ‘Management of Murray Cod in the Murray–Darling Basin’. Statement, Recommendations and Supporting Papers Proceedings of a Workshop held in Canberra, ACT, Australia. (Eds M. Lintermans, and B. Phillips.) pp 38–61. (Murray–Darling Basin Commission: Canberra, ACT, Australia.)

Rowland, S. J. (2020). ‘The Codfather. A Life Dedicated to the Study and Conservation of Australian Freshwater Fish.’ (Optima Press: Perth, WA, Australia.)

Sargent, J. C., and Galat, D. L. (2002). Fish mortality and physicochemistry in a managed floodplain wetland. Wetlands Ecology and Management 10, 113–119.
Fish mortality and physicochemistry in a managed floodplain wetland.Crossref | GoogleScholarGoogle Scholar |

Serafini, L., and Humphries, P. (2004). Preliminary guide to the identification of larvae of fish, with a bibliography of their studies, from the Murray–Darling Basin. Presented at the taxonomy workshop, Lake Hume resort, Cooperative Research Centre for Freshwater Ecology.

Sharpe, C. P. (2011). Spawning and recruitment ecology of golden perch (Macquaria ambigua Richardson, 1845) in the Murray and Darling Rivers. Ph.D. Thesis, Griffith University, Nathan, Qld, Australia.

Sisto, N. P. (2009). Environmental flows for rivers and economic compensation for irrigators. Journal of Environmental Management 90, 1236–1240.
Environmental flows for rivers and economic compensation for irrigators.Crossref | GoogleScholarGoogle Scholar | 18678441PubMed |

Stoffels, R. J., Weatherman, K. E., Bond, N. R., Morrongiello, J. R., Thiem, J. D., Butler, G., Koster, W., Kopf, R. K., McCasker, N., Ye, Q., and Zampatti, B. (2020). Stage-dependent effects of river flow and temperature regimes on the growth dynamics of an apex predator. Global Change Biology 26, 6880–6894.
Stage-dependent effects of river flow and temperature regimes on the growth dynamics of an apex predator.Crossref | GoogleScholarGoogle Scholar | 32970901PubMed |

Stuart, I., and Sharpe, C. (2020). Riverine spawning, long distance larval drift and floodplain recruitment of a pelagophilic fish, a case study of golden perch (Macquaria ambigua) in the arid Darling River, Australia. Aquatic Conservation 30, 675–690.
Riverine spawning, long distance larval drift and floodplain recruitment of a pelagophilic fish, a case study of golden perch (Macquaria ambigua) in the arid Darling River, Australia.Crossref | GoogleScholarGoogle Scholar |

Stuart, I., Sharpe, C., Stanislawski, K., Parker, A., and Mallen-Cooper, M. (2019). From an irrigation system to an ecological asset: adding environmental flows establishes recovery of a threatened fish species. Marine and Freshwater Research 70, 1295–1306.
From an irrigation system to an ecological asset: adding environmental flows establishes recovery of a threatened fish species.Crossref | GoogleScholarGoogle Scholar |

Thiem, J. D., Wooden, I. J., Baumgartner, L. J., Butler, G. L., Forbes, J. P., and Conallin, J. (2017). Recovery from a fish kill in a semi-arid Australian river: can stocking augment natural recruitment processes? Austral Ecology 42, 218–226.
Recovery from a fish kill in a semi-arid Australian river: can stocking augment natural recruitment processes?Crossref | GoogleScholarGoogle Scholar |

Thiem, J. D., Baumgartner, L. J., Fanson, B., Sadekov, A., Tonkin, Z., and Zampatti, B. P. (2021). Contrasting natal origin and movement history informs recovery pathways for three lowland river species following a mass fish kill. Marine and Freshwater Research , .
Contrasting natal origin and movement history informs recovery pathways for three lowland river species following a mass fish kill.Crossref | GoogleScholarGoogle Scholar |

Thoms, M. C., and Sheldon, F. (2000). Water resource development and hydrological change in a large dryland river: the Barwon–Darling River, Australia. Journal of Hydrology 228, 10–21.
Water resource development and hydrological change in a large dryland river: the Barwon–Darling River, Australia.Crossref | GoogleScholarGoogle Scholar |

Tockner, K., and Stanford, J. A. (2002). Riverine flood plains: present state and future trends. Environmental Conservation 29, 308–330.
Riverine flood plains: present state and future trends.Crossref | GoogleScholarGoogle Scholar |

Tonkin, Z., Kitchingman, A., Lyon, J., Kearns, J., Hackett, G., O’Mahony, J., and Bird, T. (2017). Flow magnitude and variability influence growth of two freshwater fish species in a large regulated floodplain river. Hydrobiologia 797, 289–301.
Flow magnitude and variability influence growth of two freshwater fish species in a large regulated floodplain river.Crossref | GoogleScholarGoogle Scholar |

Tonkin, Z., Stuart, I., Kitchingman, A., Thiem, J. D., Zampatti, B., Hackett, G., Koster, W., Koehn, J., Morrongiello, J., Mallen-Cooper, M., and Lyon, J. (2019). Hydrology and water temperature influence recruitment dynamics of the threatened silver perch Bidyanus bidyanus in a regulated lowland river. Marine and Freshwater Research 70, 1333–1344.
Hydrology and water temperature influence recruitment dynamics of the threatened silver perch Bidyanus bidyanus in a regulated lowland river.Crossref | GoogleScholarGoogle Scholar |

Tonkin, Z., Yen, J., Lyon, J., Kitchingman, A., Koehn, J. D., Koster, W. M., Lieschke, J., Raymond, S., Sharley, J., Stuart, I., and Todd, C. (2021). Linking flow attributes to recruitment to inform water management for an Australian freshwater fish with an equilibrium life-history strategy. The Science of the Total Environment 752, 141863.
Linking flow attributes to recruitment to inform water management for an Australian freshwater fish with an equilibrium life-history strategy.Crossref | GoogleScholarGoogle Scholar | 32889283PubMed |

Vertessy, R., Barma, D., Baumgartner, L., Mitrovic, S., Sheldon, F., and Bond, N. (2019). Independent assessment of the 2018–19 fish deaths in the lower Darling River. (Australian Government: Canberra, ACT, Australia.) Available at https://www.mdba.gov.au/publications/mdba-reports/response-fish-deaths-lower-darling

Vilizzi, L., Meredith, S. N., Sharpe, C. P., and Rehwinkel, R. (2008). Evaluating light trap efficiency by application of mesh to prevent inter-and intra-specific in situ predation on fish larvae and juveniles. Fisheries Research 93, 146–153.
Evaluating light trap efficiency by application of mesh to prevent inter-and intra-specific in situ predation on fish larvae and juveniles.Crossref | GoogleScholarGoogle Scholar |

Vörösmarty, C. J., McIntyre, P. B., Gessner, M. O., Dudgeon, D., Prusevich, A., Green, P., Glidden, S., Bunn, S. E., Sullivan, C. A., Liermann, C. R., and Davies, P. M. (2010). Global threats to human water security and river biodiversity. Nature 467, 555–561.
Global threats to human water security and river biodiversity.Crossref | GoogleScholarGoogle Scholar | 20882010PubMed |

Walker, K. F., Sheldon, F., and Puckridge, J. T. (1995). A perspective on dryland river ecosystems. Regulated Rivers 11, 85–104.
A perspective on dryland river ecosystems.Crossref | GoogleScholarGoogle Scholar |

Wallace, T., Sharpe, C., Fraser, P., Rehwinkel, R., and Vilizzi, L. (2008). The impact of drought on water quality and fish communities within refuge pools on the Lower Darling River. A technical report prepared for the Lower Murray Darling Catchment Management Authority by the Murray–Darling Freshwater Research Centre.

Ward, J. V., Tockner, K., Uehlinger, U., and Malard, F. (2001). Understanding natural patterns and processes in river corridors as the basis for effective river restoration. Regulated Rivers 17, 311–323.
Understanding natural patterns and processes in river corridors as the basis for effective river restoration.Crossref | GoogleScholarGoogle Scholar |

Watts, R. J., Keller Kopf, R., McCasker, N., Howitt, J. A., Conallin, J., Wooden, I., and Baumgartner, L. (2018). Adaptive management of environmental flows: using irrigation infrastructure to deliver environmental benefits during a large hypoxic blackwater event in the Southern Murray–Darling Basin, Australia. Environmental Management 61, 469–480.
Adaptive management of environmental flows: using irrigation infrastructure to deliver environmental benefits during a large hypoxic blackwater event in the Southern Murray–Darling Basin, Australia.Crossref | GoogleScholarGoogle Scholar | 28929206PubMed |

Webb, J. A., Arthington, A. H., and Olden, J. D. (2017). Models of ecological responses to flow regime change to inform environmental flows assessments. In ‘Water for the Environment’. pp. 287–316. (Academic Press.)

Wheeler, S. A., Zuo, A., and Bjornlund, H. (2014). Investigating the delayed on-farm consequences of selling water entitlements in the Murray–Darling Basin. Agricultural Water Management 145, 72–82.
Investigating the delayed on-farm consequences of selling water entitlements in the Murray–Darling Basin.Crossref | GoogleScholarGoogle Scholar |

Whitworth, K. L., Baldwin, D. S., and Kerr, J. L. (2012). Drought, floods and water quality: drivers of a severe hypoxic blackwater event in a major river system (the southern Murray–Darling Basin, Australia). Journal of Hydrology 450–451, 190–198.
Drought, floods and water quality: drivers of a severe hypoxic blackwater event in a major river system (the southern Murray–Darling Basin, Australia).Crossref | GoogleScholarGoogle Scholar |

Yarnell, S. M., Petts, G. E., Schmidt, J. C., Whipple, A. A., Beller, E. E., Dahm, C. N., Goodwin, P., and Viers, J. H. (2015). Functional flows in modified riverscapes: hydrographs, habitats and opportunities. Bioscience 65, 963–972.
Functional flows in modified riverscapes: hydrographs, habitats and opportunities.Crossref | GoogleScholarGoogle Scholar |

Yarnell, S. M., Stein, E. D., Webb, J. A., Grantham, T., Lusardi, R. A., Zimmerman, J., Peek, R. A., Lane, B. A., Howard, J., and Sandoval-Solis, S. (2020). A functional flows approach to selecting ecologically relevant flow metrics for environmental flow applications. River Research and Applications 36, 318–324.
A functional flows approach to selecting ecologically relevant flow metrics for environmental flow applications.Crossref | GoogleScholarGoogle Scholar |