Population structure of the chub mackerel (Scomber colias) in the NE Atlantic inferred from otolith elemental and isotopic signatures

Chemical signatures in fin spine edge of Atlantic bluefin tuna (Thunnus thynnus) can serve as habitat markers of geographically distinct marine environments

“…Isotopic markers (i.e., δ 13 C and δ 18 O) have also been efficient for reconstructing environmental history and delineating of tuna stock population structure (e.g., Rooker et al., 2008a , Rooker et al., 2008b ; Shiao et al., 2010 ; Wells et al., 2012; Fraile et al., 2016 ; Madigan et al., 2018 ; Rooker et al., 2019 ; Artetxe-Arrate et al., 2021 ). The δ 13 C and δ 18 O values that were recorded in the fin spine edge of ABFT were within the range of values already reported for other marine pelagic fishes in the northeast Atlantic ( Moreira et al., 2018 ; Correia et al., 2021 ), including previous values for ABFT measured from otoliths ( Rooker et al., 2014 ; Fraile et al., 2015 ) and fin spines ( Luque et al., 2020 ). We found that fin spine edge δ 13 C and δ 18 O values were significantly higher in ABFT captured in the Mediterranean than in the eastern Atlantic, which agrees with observed regional differences in seawater δ 13 C and δ 18 O concentrations ( LeGrande and Schmidt, 2006 ; McMahon et al., 2013 ).…”

“…The tracer element and stable isotopic composition of biomineralized structures, including otoliths (ear stones), fin spines, rays, vertebrae, and scales, can add valuable knowledge of seawater conditions in which these chemical markers were deposited. Biomineral chemical markers thus represent a powerful tool for understanding the movement, population structure, and habitat use of fish species (e.g., Campana, 1999 ; Cadrin et al., 2013 ; Madigan et al., 2014 ; Correia et al., 2021 ; Martino et al., 2021 ; Livernois et al., 2021 ; Rooker et al., 2019 ; Rooker et al., 2021 ), as fish grows, these chemical “ signatures ” are naturally incorporated into the mineral matrix of these hard structures from ambient water and/or diet (e.g., Clarke et al., 2007 ; Elsdon et al., 2008 ; Limburg et al., 2010; Gillanders and Munro, 2012 ; Tzadik et al., 2015 ; Fowler et al., 2017; Izzo et al., 2018 ; Avigliano et al., 2019 , 2020 ).…”

Spatial variability of life-history parameters of the Atlantic chub mackerel (Scomber colias), an expanding species in the northeast Atlantic

“…Muniz et al (2020), based on otolith morphology analysis, suggested the existence of one group in the northeast Atlantic islands (Azores, Madeira and the Canary Islands) and another one on the Iberian Portuguese coast. Correia et al (2021), according to microchemical analysis of the same otoliths, suggested the existence of at least four stock components in the northeast Atlantic (Azores, Madeira, Canary Islands and Iberian Portuguese coast). There is no information on the migratory behaviour of this species in the study area, although by analogy with the previous study on the species in northwest African waters (García 1982), we assume that the Atlantic chub mackerel performs annual reproductive migrations all along its distributional range.…”

Past and Contemporaneous Otolith Fingerprints Reveal Potential Anthropogenic Interferences and Allows Refinement of the Population Structure of Isopisthus parvipinnis in the South Brazil Bight

“…However, minor elements such as calcium, sodium, and strontium, because of their high concentrations in the aragonite matrix (mg/L in the liquid sample), which may precipitate in the nebulizer or overload the plasma, were determined by a Flame Atomic Absorption Spectrometry (FAAS) instrument (Perkin Elmer, Überlingen, Germany). Moreover, with low-mass otoliths, such as the otoliths of I. parvipinnis , and when we are already working with a small liquid sample volume (5 mL), further dilution of the samples to evaluate all the elements (minor and trace) in the ICP-MS, would necessarily lead to the loss of some trace informative elements [ 40 ]. In any case, analytical control was performed in both techniques.…”