Use of otolith chemistry to examine patterns of diadromy in the threatened Australian grayling<i> Prototroctes maraena</i>

Crook, David A.; Macdonald, Jed I.; O’Connor, J. P.; Barry, B.

doi:10.1111/j.1095-8649.2006.01191.x

Cited by 61 publications

(51 citation statements)

References 37 publications

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Section: Otolith Chemistrymentioning

confidence: 99%

“…The key elements used for diadromous fishes are strontium (Sr) and barium (Ba), as these elements are found in different concentrations in seawater and freshwater (Kalish 1990;Secor and Rooker 2000;Gillanders 2005;Crook et al 2006). As a result, otolith layers formed in marine waters typically exhibit higher ratios of Sr : Ca and lower ratios of Ba : Ca than layers formed in freshwater (Milton et al 2000;Crook et al 2006). Therefore, otolith chemistry analyses has already proven to be a valuable tool for examining and understanding the lifecycles and movements of riverine species of south-eastern Australia (Crook et al 2006;Crook et al 2008;Miles et al 2009).…”

Section: Otolith Chemistrymentioning

confidence: 99%

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Australian diadromous fishes – challenges and solutions for understanding migrations in the 21st century

Miles

Walsh

Butler

et al. 2014

Mar. Freshwater Res.

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Abstract. Diadromous fishes are a frequent but poorly understood component of coastal riverine fish communities in Australia. There are ,33 diadromous fishes found in Australian waters, mainly catadromous and amphidromous species. An extensive review of the literature identified major information gaps about the lifecycles and ecology of many of these species, with information on facultative diadromy, navigation, marine and early life stages being particularly limited. In many cases, this lack of information has led to poor management decisions and consequently many of the Australian diadromous species are under increasing threat from a range of environmental impacts. Much of the required information is difficult to obtain with traditional field surveys and, as a result, new and improved research tools and technologies, including telemetry, otolith chemistry, stable-isotope analysis (SIA) and functional magnetic resonance imaging (fMRI) are increasingly being applied. Key areas for research on Australian diadromous fishes should involve: (1) use of telemetry and otolith chemistry to determine the level of facultative diadromy and variation in diadromous movements across a species range; (2) use of otolith chemistry and SIA to gain a greater understanding of larval and juvenile marine life stages of catadromous and amphidromous species; and (3) use of fMRI or traditional techniques such as electroolfactogram (EOG) to determine the role of olfaction in spawning and migration, and the impact of impoundments and agricultural run-off on these critical life history stages.

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Section: Otolith Chemistrymentioning

confidence: 99%

Section: Otolith Chemistrymentioning

confidence: 99%

Australian diadromous fishes – challenges and solutions for understanding migrations in the 21st century

Miles

Walsh

Butler

et al. 2014

Mar. Freshwater Res.

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“…More recently, barium:calcium (Ba:Ca) ratios in otoliths have also proved to be useful proxies for environmental salinities experienced by fish (Thorrold & Shuttleworth 2000, Elsdon & Gillanders 2005a, Tabouret et al 2010, Feutry et al 2011. Moreover, drastic environmental change, such as migration be tween marine and freshwater biomes, can be seen in an otolith's microstructure, as these types of movements may affect otolith growth and produce informative check marks (Crook et al 2006, Hsu et al 2009). …”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Diadromous life cycle and behavioural plasticity in freshwater and estuarine Kuhliidae species (Teleostei) revealed by otolith microchemistry

Feutry¹,

Tabouret²,

Maeda³

et al. 2012

Aquat. Biol.

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Otolith microchemistry and microstructure were examined in juveniles of 3 Kuhlia species (Teleostei) from fresh and brackish environments in order to examine their migratory histories. All species presented with strontium:calcium (Sr:Ca) and barium:calcium (Ba:Ca) profiles in the inner region of the otoliths that suggested an obligatory marine larval phase. At approximately 0.3 to 0.6 mm from the otolith core, all individuals showed a sharp increase in Ba:Ca ratios that were generally associated with variation in the Sr:Ca ratio, indicating recruitment into rivers. Microchemical profiles in the outer region of the otoliths indicated a freshwater habitat for most K. rupestris and K. sauvagii and an estuarine habitat for most K. munda. Microstructure analyses validated the presence of an otolith check mark deposited during the habitat shift in K. rupestris and K. sauvagii, but not in K. munda. We hypothesise that this difference was due to lower osmotic stress for the fish moving from the sea to estuaries than from the sea to freshwater. This study demonstrated the ability of otolith multi-elemental microchemistry and microstructure to provide important insights on life history traits of species that lack basic biological information, such as those in the genus Kuhlia. The information provided in this study is critical for the conservation and management of these species.KEY WORDS: Kuhlia spp. · Otolith · Microchemistry · Microstructure · Diadromy · Femtosecond laser ablation inductively coupled plasma mass spectrometry · fs LA-ICP-MS Aquat Biol 15: 195-204, 2012 ern Australia (Merrick & Schmida 1984), while the other riverine species are a source of food in many countries such as Madagascar or Vanuatu. Resale or republication not permitted without written consent of the publisherSimilar distributions are also observed in other aquatic taxa typical of insular systems, such as Anguil lidae, Gobiidae and Eleotridae for fish, Atyidae and Palaemonidae for decapod crustaceans and Neritidae for molluscs (McDowall 2004). All these groups are diadromous and share a particular life history trait, an obligatory marine phase in their life cycle. According to Myers' definition (Myers 1949), Anguillidae found in freshwater are catadromous, migrating from freshwater to the ocean to reproduce, whereas the other taxa given as examples above are mainly amphidromous (migrate between fresh and salt water, but not to reproduce). Commonly among amphidromous species, adults live and reproduce in streams, but after hatching, their larvae are swept to the ocean, where they spend several weeks or months before recruitment into freshwater. Because stream habitats on oceanic islands are relatively scarce and subject to climatic or hydrological variations, these types of life histories are the more successful ones ). Marine larval dispersion is the only way to insure regular recruitment and connectivity among remote islands (MacArthur & Wilson 1963) and seems to be one of the main life history traits of the freshwater Kuhliidae....

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“…Therefore, two GCM projections from Earth System Grid Federation (ESGF) were used to span the range of possibilities from medium (HadGEM2-ES) to severe (FGOALS-s2) ocean warming of the Grayling's marine habitat. Only winter (May to October) sea surface temperature were extracted because Australian Grayling larva occupied marine nursery habitats during winter to spring (Berra 1982;Crook et al 2006) and the ocean warming was projected differently across seasons in south-eastern Australian (Koehn et al 2011). Representative Concentration Pathways (RCP) 8.5 was used to explore the worst case greenhouse gases emission scenario for 2055 and 2085.…”

Section: Occurrence Records and Environmental Datamentioning

confidence: 99%

“…Then we gradually removed dams that blocked access to the most upstream habitat (i.e., greatest gains in suitable habitat extent after removal). Due to the obligatory marine larval stage of Australian Grayling (Crook et al 2006), only the removal of dams that had no other barriers downstream were considered for each move. The removal of any upstream dam within a series of dams will be considered after downstream dam was removed in a previous decision.…”

Section: Assessing Habitat Change By Climate Change and Damsmentioning

confidence: 99%

Conserving migratory species under human impacts and climate change

Lin¹

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Migratory species use multiple habitats types and ecosystems to complete their life cycles, which exposes them to multiple human-caused stressors along their migratory routes. Overexploitation, habitat degradation, invasive species and connectivity loss have contributed to the decrease of migratory fishes globally in particular diadromous fishes that migrate between marine and freshwater systems. Therefore, understanding the joint impacts from anthropogenic disturbances and climate change on different habitats (e.g., both feeding and spawning grounds) and habitat connectivity (e.g., migration routes) is important for conserving migratory fish.Management will be most effective when management scales match ecological scales. This is particularly important for conserving migratory species, because of the requirement of multiple connected habitats that may cross local management boundaries. The main goals of this Ph.D. thesis are to quantify the impacts of multiple stressors on migratory fish species and prioritize management actions for conserving populations (chapters 2 & 3), species (chapter 4), and communities (chapter 5).A central challenge for managing diadromous fishes (species that migrate between freshwater and saltwater ecosystems) is to quantify increases in population persistence from actions that improve connectivity or reduce fishing mortality. In chapter 2, I used a population dynamic model and fish movement data to predict the interactive impacts of fishing pressure and connectivity loss by human modification of river flows on Australian bass Percalates novemaculeata. Then, in chapter 3, the monetary cost of management actions which included seasonal closures and restoring connectivity, were included in the model to find the most cost-effective way to conserve this fish population. The results reveal that the cost-effectiveness of management actions may vary with river flow and fishing pressure before implementing management actions, and implementation times. The spatiotemporal dynamics of how fish species and key resource users (i.e., anglers) respond to management actions can influence the effectiveness of management strategies. Flexible management plans and increased cooperation between water and fishery managers can be used to achieve the most effective balance between conserving migratory fish populations and minimising cost.Migratory species are particularly vulnerable to climate change as they occupy different ecosystems, as well as transitional habitat which are all impacted by climate change differently.Anthropogenic barriers can further reduce the ability of species to respond to a shifting climate. In ii chapter 4, I assessed the impact of climate change on the distribution of a migratory fish species, Australian grayling Prototroctes maraena, and how it affected priorities for restoring connectivity. I found climate change moves at different rates in marine and freshwater systems, decoupling the habitats used by grayling. In addition, the changing spatial distribution of suitable ...

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Use of otolith chemistry to examine patterns of diadromy in the threatened Australian grayling Prototroctes maraena

Cited by 61 publications

References 37 publications

Australian diadromous fishes – challenges and solutions for understanding migrations in the 21st century

Australian diadromous fishes – challenges and solutions for understanding migrations in the 21st century

Diadromous life cycle and behavioural plasticity in freshwater and estuarine Kuhliidae species (Teleostei) revealed by otolith microchemistry

Conserving migratory species under human impacts and climate change

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