@article {2684,
	title = {Influences of upper Floridan aquifer waters on radiocarbon in the otoliths of gray snapper (Lutjanus griseus) in the Gulf of Mexico},
	journal = {Radiocarbon},
	year = {2020},
	month = {Jun-05-2020},
	pages = {1 - 20},
	abstract = {The otoliths (ear stones) of fishes are commonly used to describe the age and growth of marine and freshwater fishes. These non-skeletal structures are fortuitous in their utility by being composed of mostly inorganic carbonate that is inert through the life of the fish. This conserved record functions like an environmental chronometer and bomb-produced radiocarbon {\textemdash} a 14C signal created by atmospheric testing of thermonuclear devices {\textemdash} can be used as a time-specific marker in validating fish age. However, complications from the hydrogeology of nearshore marine environments can complicate 14C levels, as was the case with gray snapper (Lutjanus griseus) along the Gulf of Mexico coast of Florida. Radiocarbon of these nearshore waters is influenced by freshwater input from the karst topography of the Upper Floridan Aquifer-estuarine waters that are 14C-depleted from surface and groundwater inputs. Some gray snapper likely recruited to this kind of environment where 14C levels were depleted in the earliest otolith growth, although age was validated for individuals that were not exposed to 14C-depleted waters to an age of at least 25 years with support for a 30-year lifespan.},
	issn = {0033-8222},
	doi = {10.1017/RDC.2020.29},
	url = {https://www.researchgate.net/publication/341180789_INFLUENCES_OF_UPPER_FLORIDAN_AQUIFER_WATERS_ON_RADIOCARBON_IN_THE_OTOLITHS_OF_GRAY_SNAPPER_Lutjanus_griseus_IN_THE_GULF_OF_MEXICO},
	author = {Andrews, Allen H and Barnett, Beverly K and Chanton, Jeffrey P and Thornton, Laura A and Allman, Robert J}
}
@article {2611,
	title = {Linear decline in red snapper (Lutjanus campechanus) otolith Δ14C extends the utility of the bomb radiocarbon chronometer for fish age validation in the Northern Gulf of Mexico},
	journal = {ICES Journal of Marine Science},
	volume = {8870697346588911255202655996472975862129455810210311781289189114143320657330766513996026526319911984699},
	year = {2018},
	month = {Mar-05-2018},
	abstract = {Radiocarbon (D14C) was analyzed in northern Gulf of Mexico (nGOM) red snapper (Lutjanus campechanus) otolith cores (n{\textonequarter}23), otolith
edge samples (n{\textonequarter}12), and whole age-0 otoliths (n{\textonequarter}9), with edge samples and whole age-0 otoliths constituting known-age samples.
There was no significant difference in the linear relationship of D14C versus year of formation between regional corals and known-age otolith
samples, and a linear regression fit to the combined data from 1980 to 2015 extends the utility of the bomb radiocarbon chronometer
for age validation. The entire regional coral and known-age otolith data set (1940 to 2015) was then utilized as a reference series to validate
otolith-derived red snapper age estimates for cored otolith samples. A loess regression was fit to the reference data and then the sum
of squared residuals (SSR) was computed from predicted versus observed birth years for cored adult otolith samples. This process was
then repeated for ages biased 61{\textendash}4 years. Ages with no bias applied had the lowest SSR, thus validating red snapper age estimates and
demonstrating the utility of the combined regional coral and known-age red snapper otolith D14C time series for age validation of nGOM
marine fishes.},
	keywords = {Age validation, otoliths, radiocarbon, red snapper},
	issn = {1054-3139},
	doi = {10.1093/icesjms/fsy043},
	url = {https://academic.oup.com/icesjms/advance-article/doi/10.1093/icesjms/fsy043/4992258http://academic.oup.com/icesjms/advance-article-pdf/doi/10.1093/icesjms/fsy043/24775644/fsy043.pdf},
	author = {Barnett, Beverly K and Thornton, Laura and Allman, Robert and Chanton, Jeffrey P and Patterson, William F}
}
