Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models
Abstract Oxygen‐stable isotope (δ18O) in otoliths has been useful to infer marine fish migrations. However, because otolith δ18O is affected by two parameters, temperature and δ18O of ambient water, its interpretation becomes challenging when neither of them is constant. Here, I describe a simple me...
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Limnology and Oceanography Letters |
| Online Access: | https://doi.org/10.1002/lol2.10434 |
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| author | Tatsuya Sakamoto |
| author_facet | Tatsuya Sakamoto |
| author_sort | Tatsuya Sakamoto |
| collection | DOAJ |
| description | Abstract Oxygen‐stable isotope (δ18O) in otoliths has been useful to infer marine fish migrations. However, because otolith δ18O is affected by two parameters, temperature and δ18O of ambient water, its interpretation becomes challenging when neither of them is constant. Here, I describe a simple method using hydrodynamic models to visualize potential migration histories from high‐resolution otolith δ18O chronologies. By predicting the distribution of potential otolith δ18O, that is, otolith δ18O isoscape from modeled temperature and salinity distributions and comparing these with observed values, possible fish locations can be inferred. The demonstration of sardine juveniles in the western North Pacific region reproduced their seasonal northward migrations accurately. The predicted locations were consistent with the results of sampling surveys of eggs and juveniles and correctly approached the point where fish were caught. The methodological recommendations and the successful demonstration in this study may help in planning future sclerochronology research using carbonate δ18O values. |
| format | Article |
| id | doaj-art-19cbd25b8e834eb8bde1aed7a32fbef2 |
| institution | Kabale University |
| issn | 2378-2242 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Limnology and Oceanography Letters |
| spelling | doaj-art-19cbd25b8e834eb8bde1aed7a32fbef22025-01-21T13:51:57ZengWileyLimnology and Oceanography Letters2378-22422025-02-0110110111210.1002/lol2.10434Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic modelsTatsuya Sakamoto0Atmosphere and Ocean Research Institute, University of Tokyo Kashiwa Chiba JapanAbstract Oxygen‐stable isotope (δ18O) in otoliths has been useful to infer marine fish migrations. However, because otolith δ18O is affected by two parameters, temperature and δ18O of ambient water, its interpretation becomes challenging when neither of them is constant. Here, I describe a simple method using hydrodynamic models to visualize potential migration histories from high‐resolution otolith δ18O chronologies. By predicting the distribution of potential otolith δ18O, that is, otolith δ18O isoscape from modeled temperature and salinity distributions and comparing these with observed values, possible fish locations can be inferred. The demonstration of sardine juveniles in the western North Pacific region reproduced their seasonal northward migrations accurately. The predicted locations were consistent with the results of sampling surveys of eggs and juveniles and correctly approached the point where fish were caught. The methodological recommendations and the successful demonstration in this study may help in planning future sclerochronology research using carbonate δ18O values.https://doi.org/10.1002/lol2.10434 |
| spellingShingle | Tatsuya Sakamoto Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models Limnology and Oceanography Letters |
| title | Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models |
| title_full | Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models |
| title_fullStr | Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models |
| title_full_unstemmed | Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models |
| title_short | Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models |
| title_sort | simple visualization of fish migration history based on high resolution otolith δ18o profiles and hydrodynamic models |
| url | https://doi.org/10.1002/lol2.10434 |
| work_keys_str_mv | AT tatsuyasakamoto simplevisualizationoffishmigrationhistorybasedonhighresolutionotolithd18oprofilesandhydrodynamicmodels |