Heavily impacted channel specialist. Flow-cued spawning. Flows govern recruitment strength in this Formerly a species, with spawning and recruitment enhanced by spring/summer recreational flooding and high within-channel flow pulses. Silver perch Australia species but take Southern & Spawn and recruit in flowing habitats. Moderate to 8 years in 10 ACT, NSW, is now restricted Northern Flows stimulate movement of both adults and juveniles. (Bidyanus long-lived Vic, SA, Qld due to Basin Large-scale movement requirements that are interrupted by loss of bidyanus) threatened flows and barriers to connectivity: status. flows (current velocity) disperse early life stages (larval drift) large scale spawning migrations. Impacted channel specialist. Flow-cued spawning. Flows govern recruitment strength in this species, with spawning and recruitment enhanced with Golden Perch No Key recreational spring/summer flooding and high within-channel flow pulses. Southern & Moderate to (but a no-take target species. 8 years in 10 Spawn and recruit in flowing habitats Northern (Macquaria long-lived population in Important Flows stimulate movement Basin ambigua) Vic) economic asset. Flows (current velocity) disperse early life stages. Golden perch have more flexibility in spawning and recruitment than silver perch. Heavily impacted channel specialist. Large-scale movements that are critical in the life-cycle (e.g. spawning migrations and larval drift) are interrupted by loss of flows Iconic species. and barriers to connectivity. Key recreational Requires access to fast and moderate flowing in-channel habitat of target species & good quality. Spawn and recruit in flowing habitats—loss of these key economic habitats has major impacts on this species. Murray cod asset. High Seasonally appropriate flows (with rising water levels) are required to Southern & Moderate to Australia importance to stimulate migration. Flows also increase productivity and available 8 years in 10 Northern (Maccullochella long-lived Vic, SA aboriginal habitat. Basin peelii peelii) peoples. Highly impacted by blackwater events—flow is important to maintain Formerly a water quality. commercial Spawning is independent of flooding but recruitment can be enhanced species before by elevated flows. fishery declined. Nesting species that requires stable water depths for the duration of nesting to ensure adults do not abandon nests. Requires flowing water during this time period to maintain water quality. Flow (current velocity) then disperses larval stages.
Silver perch (Bidyanus bidyanus) Moderate to long-lived 8 years in 10 Australia ACT, NSW, Vic, SA, Qld Formerly a recreational species but take is now restricted due to threatened status. Heavily impacted channel specialist. Flow-cued spawning. Flows govern recruitment strength in this species, with spawning and recruitment enhanced by spring/summer flooding and high within-channel flow pulses. Spawn and recruit in flowing habitats. Flows stimulate movement of both adults and juveniles. Large-scale movement requirements that are interrupted by loss of flows and barriers to connectivity: flows (current velocity) disperse early life stages (larval drift) large scale spawning migrations. Southern & Northern Basin Golden Perch (Macquaria ambigua) Moderate to long-lived 8 years in 10 No (but a no-take population in Vic) Key recreational target species. Important economic asset. Impacted channel specialist. Flow-cued spawning. Flows govern recruitment strength in this species, with spawning and recruitment enhanced with spring/summer flooding and high within-channel flow pulses. Spawn and recruit in flowing habitats Flows stimulate movement Flows (current velocity) disperse early life stages. Golden perch have more flexibility in spawning and recruitment than silver perch. Southern & Northern Basin Murray cod (Maccullochella peelii peelii) Moderate to long-lived 8 years in 10 Australia Vic, SA Iconic species. Key recreational target species & key economic asset. High importance to aboriginal peoples. Formerly a commercial species before fishery declined. Heavily impacted channel specialist. Large-scale movements that are critical in the life-cycle (e.g. spawning migrations and larval drift) are interrupted by loss of flows and barriers to connectivity. Requires access to fast and moderate flowing in-channel habitat of good quality. Spawn and recruit in flowing habitats—loss of these habitats has major impacts on this species. Seasonally appropriate flows (with rising water levels) are required to stimulate migration. Flows also increase productivity and available habitat. Highly impacted by blackwater events—flow is important to maintain water quality. Spawning is independent of flooding but recruitment can be enhanced by elevated flows. Nesting species that requires stable water depths for the duration of nesting to ensure adults do not abandon nests. Requires flowing water during this time period to maintain water quality. Flow (current velocity) then disperses larval stages. Southern & Northern Basin
Final-BWS-Nov14_0816.docx