Microscale stable carbon and oxygen isotope measurement of individual otoliths of larvae and juveniles of Japanese anchovy and sardine

Nishida, Kozue; Yasu, Ayaka; Nanjo, Nobuaki; Takahashi, Motomitsu; Kitajima, Satoshi; Ishimura, Toyoho

doi:10.1016/j.ecss.2020.106946

Cited by 8 publications

(7 citation statements)

References 45 publications

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“…Most of the studies carried out to date have concluded that otolith δ 18 O is mainly driven by ambient temperatures and deposited in the otoliths independently of kinetic and metabolic effects [37,[76][77][78]. However small-scale local fluctuations in water temperature, salinity and/or shifts in the pH of the endolymph may also bias estimates of individual geolocation and lead to inaccurate predictions [79,80].…”

Section: Oxygen Isotopic Distribution Along the Otolith And Isoscape Predictionsmentioning

confidence: 99%

Otolith δ18O Composition as a Tracer of Yellowfin Tuna (Thunnus albacares) Origin in the Indian Ocean

Artetxe-Arrate

Fraile

Farley

et al. 2021

Oceans

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Yellowfin tuna of the Indian Ocean is overfished, and a better understanding of the stock structure is needed to enable sustainable management. Here, otolith δ18O values of young-of-the-year fish from known nursery areas of the equatorial Indian Ocean (West, Central and East) were used to establish a reference isotopic signature to predict the origin of sub-adult and adult individuals. Sub-adult tuna otolith δ18O values from Reunion Island were similar to the West nursery signature, but otolith δ18O values of sub-adults from Pakistan were unlike any of the nurseries sampled. Therefore, δ18O values from the Pakistan area samples were considered an additional nursery source for predicting the origin of adult tuna, using a multinomial logistic regression classification method. The western equatorial area was the most productive nursery for three fishing grounds sampled, with a minor contribution of Pakistan-like origin fish. Contribution of Central or East nurseries to the adult population was negligible. One adult otolith was analysed by secondary ion mass spectrometry along the otolith growth transect and results were compared with an isoscape approach to infer lifetime movements. This study is an important first step towards understanding the spatial structure and connectivity of the species.

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Section: Oxygen Isotopic Distribution Along the Otolith And Isoscape Predictionsmentioning

confidence: 99%

Otolith δ18O Composition as a Tracer of Yellowfin Tuna (Thunnus albacares) Origin in the Indian Ocean

Artetxe-Arrate

Fraile

Farley

et al. 2021

Oceans

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“…Calanus stores a large amount of lipid reserves during phytoplankton blooms (Gatten et al, 1980). The biology and ecology of C. sinicus in the Sea of Japan have been poorly studied, but the coastal areas of the Sea of Japan are spawning and nursery grounds for Japanese sardines (Sardinops melanosticta), Japanese anchovy (Engraulis japonicus), and Pacific bluefin tuna (Thunnus orientalis) (Nishida et al, 2020;Furuichi et al, 2020;Ohshimo et al, 2017); the larvae of these species prey on both the larval and adult stages of C. sinicus (Hirakawa et al, 1997;Hirakawa and Goto, 1996;Kodama et al, 2017a). Therefore, C. sinicus plays a vital role as a major component of the second trophic level in the Sea of Japan.…”

Section: Introductionmentioning

confidence: 99%

Carbon and nitrogen dynamics in the coastal Sea of Japan inferred from 15 years of measurements of stable isotope ratios of <i>Calanus sinicus</i>

et al. 2022

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Abstract. Both nitrogen and carbon dynamics have changed in the Sea of Japan. We hypothesized that the carbon and nitrogen stable isotope ratios (δ13C and δ15N) of the copepod Calanus sinicus could record changes in the coastal environment of the Sea of Japan. Consequently, these isotope ratios were monitored during the spring at four stations from 2006 to 2020 to identify the changes in carbon and nitrogen dynamics. The δ13C values ranged from −24.7 ‰ to −15.0 ‰ and decreased from the spring bloom (February–March) to the post-bloom (June–July) seasons. These variations were attributed to changes in the physiology of both C. sinicus and phytoplankton δ13C contents. The δ15N values range from 2.8 ‰ to 8.8 ‰, indicating that C. sinicus is a secondary producer; the tendency of the δ15N values to increase from the bloom to the post-bloom seasons was attributable to an increase in the δ15N of phytoplankton. A generalized linear model (GLM) approach indicated that >70 % of the variations in δ13C can be explained by sea surface temperature (SST), sea surface chlorophyll a concentration (SSC), carbon:nitrogen ratio of C. sinicus (C/N ratio), and geographic differences. The residuals of δ13C in the GLM decreased yearly (−0.035 ‰ yr−1). The GLM for δ15N of C. sinicus indicated that δ15N varies with the stage or sex in addition to SST, SSC, C/N ratio, and geographic differences. The δ15N values of female C. sinicus and stage V copepodites were the lowest and highest, respectively. The residuals of δ15N in the GLM did not exhibit a significant interannual trend. These results suggest that the carbon isotope ratio in the secondary producer has linearly changed in the coastal Sea of Japan over the past 15 years. Moreover, the changes in carbon dynamics of this area have been recorded and observed to impact the marine ecosystem, while the nitrogen dynamics have not been recorded despite the increasing nitrogenous nutrient inputs in this sea.

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“…Recently, the continuous‐flow stable isotope ratio mass spectrometer system (MICAL3c) developed by Ishimura et al 22,23 enabled accurate δ 18 O analysis (<±0.1‰) of CaCO 3 at amounts as low as 0.2 μg. This ultra‐microvolume analysis enabled high‐resolution δ 18 O analysis along the daily ring of otoliths and allowed us to reconstruct the weekly temperature history of larval and juvenile stages of fish 24–26 . In addition, the ability to analyze the micro‐regions of otoliths growing under the controlled temperature enables us to construct the temperature dependency equations for each fish species, which is important for calculating experienced water temperature 11–13 .…”

Section: Introductionmentioning

confidence: 99%

“…This ultra-microvolume analysis enabled highresolution δ 18 O analysis along the daily ring of otoliths and allowed us to reconstruct the weekly temperature history of larval and juvenile stages of fish. [24][25][26] In addition, the ability to analyze the micro-regions of otoliths growing under the controlled temperature enables us to construct the temperature dependency equations for each fish species, which is important for calculating experienced water temperature. [11][12][13] Furthermore, Sakamoto et al 25 This study aimed to establish an analytical method for elucidating the daily isotopic history of fish otoliths, using the micro-scale isotope analysis of MICAL3c, which has never been achieved before.…”

Section: Introductionmentioning

confidence: 99%

Extracting daily isotopic records on fish otolith (Trachurus japonicus) by combining micro‐milling and micro‐scale isotopic analysis (MICAL‐CF‐IRMS)

Muto

Ishimura

Takahashi

et al. 2022

Rapid Comm Mass Spectrometry

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Rationale The recent progress in micro‐scale isotopic analytical techniques for otoliths has enabled the reconstruction of the experienced water temperature history of fish in every few days resolution using the stable oxygen isotope ratio (δ18O) of otoliths. We aimed to improve those techniques and extract the daily δ18O records of otoliths formed during the juvenile period. Methods Growth rings were formed daily in fish otoliths. We precisely distinguished the daily rings in otoliths of Japanese jack mackerel Trachurus japonicus, and milled them along daily growth rings using a high‐spatial resolution micromilling system (Geomill326). Then, we determined the stable carbon and oxygen (δ13C, δ18O) isotopic compositions using a high‐precision micro‐scale isotopic analytical system (MICAL3c with IsoPrime 100). Results We successfully milled each daily ring with width ranging from 14.0 to 62.9 μm (average 27.0 μm) during the high growth period (30–70 days after hatching), and determined the isotopic compositions of otolith aragonite. Conclusions Our improved micro‐scale analytical method is the first to determine the daily δ18O history of fish otoliths. By using our method together with the δ18O – water temperature equation, the daily history of experienced water temperature can be elucidated. Our high‐resolution milling and analytical technique can also be applied to high‐resolution isotope analysis for stalactites, clams, and corals.

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Microscale stable carbon and oxygen isotope measurement of individual otoliths of larvae and juveniles of Japanese anchovy and sardine

Cited by 8 publications

References 45 publications

Otolith δ18O Composition as a Tracer of Yellowfin Tuna (Thunnus albacares) Origin in the Indian Ocean

Otolith δ18O Composition as a Tracer of Yellowfin Tuna (Thunnus albacares) Origin in the Indian Ocean

Carbon and nitrogen dynamics in the coastal Sea of Japan inferred from 15 years of measurements of stable isotope ratios of <i>Calanus sinicus</i>

Extracting daily isotopic records on fish otolith (Trachurus japonicus) by combining micro‐milling and micro‐scale isotopic analysis (MICAL‐CF‐IRMS)

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Microscale stable carbon and oxygen isotope measurement of individual otoliths of larvae and juveniles of Japanese anchovy and sardine

Cited by 8 publications

References 45 publications

Otolith δ18O Composition as a Tracer of Yellowfin Tuna (Thunnus albacares) Origin in the Indian Ocean

Otolith δ18O Composition as a Tracer of Yellowfin Tuna (Thunnus albacares) Origin in the Indian Ocean

Carbon and nitrogen dynamics in the coastal Sea of Japan inferred from 15 years of measurements of stable isotope ratios of &lt;i&gt;Calanus sinicus&lt;/i&gt;

Extracting daily isotopic records on fish otolith (Trachurus japonicus) by combining micro‐milling and micro‐scale isotopic analysis (MICAL‐CF‐IRMS)

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Carbon and nitrogen dynamics in the coastal Sea of Japan inferred from 15 years of measurements of stable isotope ratios of <i>Calanus sinicus</i>