Radiocarbon in otoliths of tropical marine fishes: Reference Δ14C chronology for north Caribbean waters.
| Autor: | Shervette VR; Fish/Fisheries Conservation Lab, University of South Carolina Aiken, Aiken, SC, United States of America.; University of South Carolina, Marine Sciences, Columbia, SC, United States of America., Overly KE; Riverside Technology for the NOAA National Marine Fisheries Service, Panama City Laboratory, Panama City, Florida, United States of America., Rivera Hernández JM; Fish/Fisheries Conservation Lab, University of South Carolina Aiken, Aiken, SC, United States of America.; University of South Carolina, Marine Sciences, Columbia, SC, United States of America. |
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| Jazyk: | angličtina |
| Zdroj: | PloS one [PLoS One] 2021 May 12; Vol. 16 (5), pp. e0251442. Date of Electronic Publication: 2021 May 12 (Print Publication: 2021). |
| DOI: | 10.1371/journal.pone.0251442 |
| Abstrakt: | Reef fishes support important fisheries throughout the Caribbean, but a combination of factors in the tropics makes otolith microstructure difficult to interpret for age estimation. Therefore, validation of ageing methods, via application of Δ14C is a major research priority. Utilizing known-age otolith material from north Caribbean fishes, we determined that a distinct regional Δ14C chronology exists, differing from coral-based chronologies compiled for ageing validation from a wide-ranging area of the Atlantic and from an otolith-based chronology from the Gulf of Mexico. Our north Caribbean Δ14C chronology established a decline series with narrow prediction intervals that proved successful in ageing validation of three economically important reef fish species. In examining why our north Caribbean Δ14C chronology differed from some of the coral-based Δ14C data reported from the region, we determined differences among study objectives and research design impact Δ14C temporal relationships. This resulted in establishing the first of three important considerations relevant to applying Δ14C chronologies for ageing validation: 1) evaluation of the applicability of original goal/objectives and study design of potential Δ14C reference studies. Next, we determined differences between our Δ14C chronology and those from Florida and the Gulf of Mexico were explained by differences in regional patterns of oceanic upwelling, resulting in the second consideration for future validation work: 2) evaluation of the applicability of Δ14C reference data to the region/location where fish samples were obtained. Lastly, we emphasize the application of our north Caribbean Δ14C chronology should be limited to ageing validation studies of fishes from this region known to inhabit shallow water coral habitat as juveniles. Thus, we note the final consideration to strengthen findings of future age validation studies: 3) use of Δ14C analysis for age validation should be limited to species whose juvenile habitat is known to reflect the regional Δ14C reference chronology. Competing Interests: The authors have declared that no competing interests exist. |
| Databáze: | MEDLINE |
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