scholarly journals Reconstruction of temperature experienced by Pacific bluefin tuna Thunnus orientalis larvae using SIMS and microvolume CF-IRMS otolith oxygen isotope analyses

2020 ◽  
Vol 649 ◽  
pp. 175-188
Author(s):  
Y Hane ◽  
S Kimura ◽  
Y Yokoyama ◽  
Y Miyairi ◽  
T Ushikubo ◽  
...  

This study aimed to reconstruct temperatures experienced during the larval period by adult Pacific bluefin tuna Thunnus orientalis using high-resolution otolith stable oxygen isotope (δ18O) analysis. A novel otolith sample preparation protocol for secondary ion mass spectrometry (SIMS) analysis developed in this study reduced the background noise of SIMS measurements, enabling analyses of >10 times higher resolution around the otolith core compared to previous studies using conventional isotope ratio mass spectrometry (IRMS). The values obtained from SIMS were compared to those obtained by microvolume δ18Ootolith analysis using micromilling and conventional continuous-flow IRMS (CF-IRMS). There was a systematic offset (average 0.41‰ with SIMS resulting in lower values) most likely caused by matrix effects on SIMS δ18Ootolith values that can be calibrated using a strong linear relationship between SIMS and CF-IRMS measurements (r2 = 0.78, p < 0.001). The core-to-edge δ18Ootolith of 5 Pacific bluefin tuna revealed fine-scale seasonal variations in water temperature agreeing with known migration patterns. In addition, the ambient water temperature experienced during larval stages (about 10-20 d post hatch) estimated from otolith core δ18O ranged from 26.7 to 30.7°C, overlapping with temperatures associated with the occurrence of larval Pacific bluefin tuna. Combining SIMS and microvolume CF-IRMS δ18O otolith analyses offers a microscale examination of fish ecology that is not possible with conventional IRMS techniques. This novel method is particularly useful for understanding the early life history of fish that may be affected by climate change and reconstructing a well-resolved migration history for fish species that have small otoliths and/or narrow growth increments.

2010 ◽  
Vol 420 ◽  
pp. 207-219 ◽  
Author(s):  
JC Shiao ◽  
SW Wang ◽  
K Yokawa ◽  
M Ichinokawa ◽  
Y Takeuchi ◽  
...  

2006 ◽  
Vol 72 (6) ◽  
pp. 1166-1176 ◽  
Author(s):  
Takashi KITAGAWA ◽  
Aida SARTIMBUL ◽  
Hideaki NAKATA ◽  
Shingo KIMURA ◽  
Harumi YAMADA ◽  
...  

2013 ◽  
Vol 481 ◽  
pp. 199-209 ◽  
Author(s):  
T Kitagawa ◽  
T Ishimura ◽  
R Uozato ◽  
K Shirai ◽  
Y Amano ◽  
...  

Aquaculture ◽  
2021 ◽  
pp. 736562
Author(s):  
Koji Murashita ◽  
Hiroshi Hashimoto ◽  
Toshinori Takashi ◽  
Takeshi Eba ◽  
Kazunori Kumon ◽  
...  

2016 ◽  
Vol 174 ◽  
pp. 30-39 ◽  
Author(s):  
Yumi Okochi ◽  
Osamu Abe ◽  
Sho Tanaka ◽  
Yukio Ishihara ◽  
Akio Shimizu

2014 ◽  
Vol 81 (1) ◽  
pp. 113-121 ◽  
Author(s):  
Yasuo Agawa ◽  
Mayui Iwaki ◽  
Takafumi Komiya ◽  
Tomoki Honryo ◽  
Kouhei Tamura ◽  
...  

Author(s):  
Cole T. Edwards ◽  
Clive M. Jones ◽  
Page C. Quinton ◽  
David A. Fike

The oxygen isotopic compositions (δ18O) of minimally altered phosphate minerals and fossils, such as conodont elements, are used as a proxy for past ocean temperature. Phosphate is thermally stable under low to moderate burial conditions and is ideal for reconstructing seawater temperatures because the P-O bonds are highly resistant to isotopic exchange during diagenesis. Traditional bulk methods used to measure conodont δ18O include multiple conodont elements, which can reflect different environments and potentially yield an aggregate δ18O value derived from a mixture of different water masses. In situ spot analyses of individual elements using micro-analytical techniques, such as secondary ion mass spectrometry (SIMS), can address these issues. Here we present 108 new δ18O values using SIMS from conodont apatite collected from four Lower to Upper Ordovician stratigraphic successions from North America (Nevada, Oklahoma, and the Cincinnati Arch region of Kentucky and Indiana, USA). The available elements measured had a range of thermal alteration regimes that are categorized based on their conodont alteration index (CAI) as either low (CAI = 1−2) or high (CAI = 3−4). Though individual spot analyses of the same element yield δ18O values that vary by several per mil (‰), most form a normal distribution around a mean value. Isotopic variability of individual spots can be minimized by avoiding surficial heterogeneities like cracks, pits, or near the edge of the element and the precision can be improved with multiple (≥4) spot analyses of the same element. Mean δ18O values from multiple conodonts from the same bed range between 0.0 and 4.3‰ (median 1.0‰), regardless of low or high CAI values. Oxygen isotopic values measured using SIMS in this study reproduce values similar to published trends, namely, δ18O values increase during the Early−Middle Ordovician and plateau by the mid Darriwilian (late Middle Ordovician). Twenty-two of the measured conodonts were from ten sampled beds that had been previously measured using bulk analysis. SIMS-based δ18O values from these samples are more positive by an average of 1.7‰ compared to bulk values, consistent with observations by others who attribute the shift to carbonate- and hydroxyl-related SIMS matrix effects. This offset has implications for paleo-temperature model estimates, which indicate that a 4 °C temperature change corresponds to a 1‰ shift in δ18O (‰). Although this uncertainty precludes precise paleo-temperature reconstructions by SIMS, it is valuable for identifying spatial and stratigraphic trends in temperature that might not have been previously possible with bulk approaches.


2014 ◽  
Vol 47 (7) ◽  
pp. 2040-2049 ◽  
Author(s):  
Takayuki Ohnishi ◽  
Amal Biswas ◽  
Kohshi Kaminaka ◽  
Takahiro Nakao ◽  
Masashi Nakajima ◽  
...  

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