2019
DOI: 10.1111/jfb.14100
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Periodicity of the growth‐band formation in vertebrae of juvenile scalloped hammerhead shark Sphyrna lewini from the Mexican Pacific Ocean

Abstract: The age of 296 juvenile scalloped hammerhead sharks Sphyrna lewini caught by several fisheries in the Mexican Pacific Ocean from March 2007 to September 2017 were estimated from growth band counts in thin‐sectioned vertebrae. Marginal‐increment analysis (MIA) and centrum‐edge analysis (CEA) were used to verify the periodicity of formation of the growth bands, whereas elemental profiles obtained from LA‐ICP‐MS transect scans in vertebrae of 15 juveniles were used as an alternative approach to verify the age of … Show more

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Cited by 4 publications
(4 citation statements)
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“…The mean percentage of the elemental concentration data below the limits of detection (LOD) was ≤10% for all elements (i.e. 7 Li, 24 Mg, 55 Mn, 57 Fe, 59 Co, 85 Rb, 88 Sr, 89 Y, 114 Cd, 118 Sn, 137 Ba, 208 Pb), except for 45 Sc (42.9%), 51 V (57.1%), 53 Cr (64.3%), 72 Ge (71.4%), 89 Y (64.3%), 114 Cd (57.1%), 197 Au (71.4%), 232 Th (63.3%) and 238 U (78.6%) which were not regularly detected in the vertebrae of embryos and pregnant females. For more details on the mean (±standard deviation) element:Ca ratios (µmole⋅mole −1 ) quantified at the vertebral focus and edge of embryos and pregnant females, please refer to Table S1 from the Supplementary Information.…”
Section: Resultsmentioning
confidence: 99%
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“…The mean percentage of the elemental concentration data below the limits of detection (LOD) was ≤10% for all elements (i.e. 7 Li, 24 Mg, 55 Mn, 57 Fe, 59 Co, 85 Rb, 88 Sr, 89 Y, 114 Cd, 118 Sn, 137 Ba, 208 Pb), except for 45 Sc (42.9%), 51 V (57.1%), 53 Cr (64.3%), 72 Ge (71.4%), 89 Y (64.3%), 114 Cd (57.1%), 197 Au (71.4%), 232 Th (63.3%) and 238 U (78.6%) which were not regularly detected in the vertebrae of embryos and pregnant females. For more details on the mean (±standard deviation) element:Ca ratios (µmole⋅mole −1 ) quantified at the vertebral focus and edge of embryos and pregnant females, please refer to Table S1 from the Supplementary Information.…”
Section: Resultsmentioning
confidence: 99%
“…The elemental composition of the vertebrae of S. lewini was quantified using a Photon-Machines Analyte 193 excimer UV laser ablation system (LA), connected to an Agilent Technologies 7500CX quadrupole inductively coupled plasma-mass spectrometer (ICP-MS). Raw data of the ion counts per second (cps) were collected for the following 21 elements: 7 Li, 24 Mg, 43 Ca, 45 Sc, 51 V, 53 Cr, 55 Mn, 57 Fe, 59 Co, 63 Cu, 72 Ge, 85 Rb, 88 Sr, 89 Y, 114 Cd, 118 Sn, 137 Ba, 197 Au, 208 Pb, 232 Th and 238 U with 43 Ca being quantified for use as internal standard. These were screened in the vertebrae of S. lewini because this combination of masses minimizes potential interferences that can arise from isobaric spectral overlap, sample matrix effects, and the presence of molecular ions 39 and was successfully used in previous studies for inferring the life history of sharks 19,20,[23][24][25][26][27] .…”
Section: La-icp-ms Analysesmentioning
confidence: 99%
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“…Vertebral elemental analysis has also been employed to study elasmobranch stock structure (Schroeder et al 2010;McMillan et al 2017aMcMillan et al , 2017b, natal origin (Lewis et al 2016;TinHan et al 2020;LaFreniere et al 2023), age determination (Scharer et al 2012;Mohan et al 2018;Coiraton et al 2019), age-related movements (Smith et al 2016;Coiraton et al 2020), ontogenetic habitat shifts (Livernois et al 2021), and habitat use (Izzo et al 2016;Feitosa et al 2021;Brodbeck et al 2023;Mohan et al 2023). Both essential (i.e., magnesium [Mg], manganese [Mn], and zinc [Zn]) and non-essential (i.e., barium [Ba] and strontium [Sr]) trace elements have proven useful in these studies.…”
Section: Introductionmentioning
confidence: 99%