Identifying physiological and environmental influences on otolith chemistry in a coastal fishery species

Martino, Jasmin C.; Doubleday, Zoë A.; Fowler, Anthony J.; Gillanders, Bronwyn M.

doi:10.1071/mf20196

Cited by 10 publications

(9 citation statements)

References 128 publications

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“…Recent research demonstrated that Ɛ Nd values in the soft and hard tissues of bivalve molluscs are highly effective at identifying the origins of individuals at even small spatial scales (10s km) (Saitoh et al, 2018; Tanaka et al, 2022; Zhao et al, 2019). Concentrations of barium ratioed to calcium (Ba/Ca) are an additional candidate for universal provenance, as signatures reflect seawater composition (Bath et al, 2000; Walther & Thorrold, 2006), and are little affected by individual life history factors, such as physiology or diet (Grammer et al, 2017; Hüssy et al, 2021; Martino et al, 2021). However, significant work first needs to be undertaken to quantify spatial variations in these potential universal markers.…”

Section: Discussionmentioning

confidence: 99%

The universal imprint of oxygen isotopes can track the origins of seafood

et al. 2022

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Identifying the source of seafood is critical for combatting seafood fraud, but current tools are predominantly developed and applied on a species-specific basis. This study investigates how multiple marine taxa could be geolocated at global scales by exploiting stable oxygen isotope compositions in carbonate biominerals (δ 18 O biomin ), where we expect to see universally expressed and predictable spatial variation in δ 18 O biomin values across taxa. We constructed global ocean isoscapes of predicted δ 18 O biomin values specific to fish (otoliths), cephalopod (statoliths) and shellfish (shells), and a fourth combined "universal" isoscape, and evaluated their capacity to derive δ 18 O biomin values among known-origin samples. High correspondence between isoscape-predicted δ 18 O biomin values and a compiled database of measured, georeferenced values (3954 datapoints encompassing 68 species) indicated that this δ 18 O biomin approach works effectively, particularly in regions with highly resolved projections of seawater δ 18 O composition. When compared to taxon-specific isoscapes, the universal isoscape demonstrated similar accuracy, indicating exciting potential for universal provenance applications. We tested the universal framework via a case study, using machinelearning models to identify sample origins amongst regions of divergent (Tropical Asia vs Temperate Australasia) and similar (Temperate Asia vs Temperate Australasia) climates and latitudes. Classification accuracy averaged 75.3% between divergent regions, and 66% between similar regions. When endothermic tuna species were excluded from the analysis, the accuracy between divergent regions increased up to 90% between divergent regions. This study presents the first empirical step towards developing universal chemical markers, which have the potential to support a more inclusive and global approach of validating provenance of seafood.

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Section: Discussionmentioning

confidence: 99%

The universal imprint of oxygen isotopes can track the origins of seafood

et al. 2022

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“…The composition of trace elements in fish otoliths is influenced by different physiological processes that regulate their incorporation [ 18 , 20 , 22 – 24 , 75 , 76 ], and may thus limit its usefulness for inferring fish life history. However, some trace element ratios in the otolith, including the Sr/Ca or Sr isotope ratios, could reflect the ambient water conditions such as temperature and salinity [ 21 , 47 , 77 ] that are not strongly affected by biologically factors [ 28 , 29 ] or seasonal-annual flows [ 78 ].…”

Section: Discussionmentioning

confidence: 99%

“…Elements are absorbed from the water through the gills or the intestine into the plasma and the endolymph surrounding the otolith, where they crystallize in the matrix [ 17 ]. The process is affected by various environmental and physiological factors, including salinity, temperature, ontogeny, metamorphosis, sex, growth, and diet [ 18 – 24 ]. Incorporation also depends on the element concerned, and there are many differences between them.…”

Section: Introductionmentioning

confidence: 99%

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Natal origin and migration pathways of Mekong catfish (Pangasius krempfi) using strontium isotopes and trace element concentrations in environmental water and otoliths

et al. 2021

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To improve our knowledge of the migration pathway of a highly threatened fish species along the Mekong River, strontium isotope ratios (87Sr/86Sr) and 18 trace element concentrations were measured in the water and in the otoliths of an anadromous catfish, Pangasius krempfi, to infer its natal origin and potential migration pathways. Water was sampled at 18 locations along the mainstream, tributaries and distributaries of the Mekong River. To check for accuracy and precision, measurements of the 87Sr/86Sr ratios and trace element concentrations were then compared in two laboratories that use different analytical methods. Differences in trace element concentrations between locations were not significant and could not, therefore, be used to discriminate between migration pathways. However, the Mekong mainstream, tributaries and distributaries could all be discriminated using Sr isotopes. The 87Sr/86Sr profiles recorded in P. krempfi otoliths showed that there were three contingents with obligate freshwater hatching and variable spawning sites along the Mekong mainstream, from Phnom Penh (Cambodia) to Nong Khai (Thailand) or further. After hatching, the fish migrated more or less rapidly to the Mekong Delta and then settled for most of their lifetime in brackish water. Spawning habitats and migration routes may be threatened by habitat shifts and the increasing number of hydropower dams along the river, especially the contingents born above Khone Falls (Laos). The conservation of P. krempfi, as well as other migratory fish in the Mekong River, requires agreements, common actions and management by all countries along the Mekong River. This study highlighted the importance of using both Sr/Ca and 87Sr/86Sr ratios to understand life history of anadromous fishes as the 87Sr/86Sr ratio in the water was shown to be less effective than the Sr/Ca ratio in identifying movements between different saline areas.

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“…Interpreting otolith chemistry is further limited by physiological factors (e.g. metabolism, reproduction, osmoregulation) that influence the overall and element‐specific composition of otoliths (Martino et al, 2020; Reis‐Santos et al, 2018; Sturrock et al, 2015). Environmental and physiological influences must be distinguished to accurately determine the movement of fish and connectivity across populations.…”

Section: Introductionmentioning

confidence: 99%

Determining population structure and connectivity through otolith chemistry of stout whiting, Sillago robusta

Sarakinis

Taylor

Johnson

et al. 2022

Fisheries Management Eco

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Connectivity in aquatic systems allows for the delivery of resources to and from habitats and the exchange of genetic material (Brookes et al., 2015;Cury, 1994). For fish populations, connectivity includes dispersal or movement of individuals as eggs, larvae, juveniles or adults (Calò et al., 2013). Assessing the structure of fish populations is critical in understanding connectivity patterns, while also allowing for appropriately targeted management strategies for heavily fished species (Avigliano et al., 2017;Walters & Martell, 2004). Population structure and connectivity have previously been analysed using both artificially applied and naturally occurring tagging techniques for a range of fish species.Applied tagging methods (e.g. archival tags and acoustic telemetry) have been used to determine migratory patterns and assess space use (Calò et al., 2013;Hutson et al., 2007). Archival tags incorporate environmental sensors to record movement and oceanographic data over a given time (

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Identifying physiological and environmental influences on otolith chemistry in a coastal fishery species

Cited by 10 publications

References 128 publications

The universal imprint of oxygen isotopes can track the origins of seafood

The universal imprint of oxygen isotopes can track the origins of seafood

Natal origin and migration pathways of Mekong catfish (Pangasius krempfi) using strontium isotopes and trace element concentrations in environmental water and otoliths

Determining population structure and connectivity through otolith chemistry of stout whiting, Sillago robusta

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