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<p>Reef-associated fishes are integral components of marine ecosystems; many also support recreational, commercial, and subsistence fisheries. The sustainable management of these fisheries requires a detailed region-specific understanding of population age structure so that size and age data of fisheries species can be used to estimate life history parameters. Bomb-produced radiocarbon (<sup>14</sup>C) records are sparse in the western North Atlantic Ocean (WNAO); a need exists to establish new chronologies in regions that are fished to allow use of this unique tool in age validation studies. Utilizing known-age otolith material from reef-associated demersal fishes collected from continental shelf habitats of the southeastern U.S. (SEUS), we determined that a distinct regional <sup>14</sup>C chronology exists for shallow SEUS waters, differing from <sup>14</sup>C reference chronologies for the adjacent regions of Bermuda, Florida Keys, and north Caribbean. Our results provide additional <sup>14</sup>C data from the WNAO for investigating oceanic water mass age and renewal and a new <sup>14</sup>C reference time series for use as an important tool to validate age estimation of SEUS demersal reef fish species. Age estimation methods for SEUS rock hind <i>Epinephelus adscensionis</i>, red hind <i>E. guttatus</i>, and yellowfin grouper <i>Mycteroperca venenosa</i> were successfully validated in this study; SEUS rock hind attained a maximum age of 35&#xa0;years, extending the longevity of this species in the region from a previous maximum age of 12. Our results also extended maximum ages for SEUS red hind from 11 to 23&#xa0;years and yellowfin grouper from 31 to 37&#xa0;years.</p>

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Bomb radiocarbon in otoliths and eye lenses of reef fishes from Atlantic waters of the southeastern U.S.

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月17日

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  • Virginia R. Shervette,
  • Jesús M. Rivera Hernández,
  • Scott B. Van Sant,
  • Katherine E. Overly,
  • Julie L. Vecchio,
  • Allen H. Andrews

摘要

Reef-associated fishes are integral components of marine ecosystems; many also support recreational, commercial, and subsistence fisheries. The sustainable management of these fisheries requires a detailed region-specific understanding of population age structure so that size and age data of fisheries species can be used to estimate life history parameters. Bomb-produced radiocarbon (14C) records are sparse in the western North Atlantic Ocean (WNAO); a need exists to establish new chronologies in regions that are fished to allow use of this unique tool in age validation studies. Utilizing known-age otolith material from reef-associated demersal fishes collected from continental shelf habitats of the southeastern U.S. (SEUS), we determined that a distinct regional 14C chronology exists for shallow SEUS waters, differing from 14C reference chronologies for the adjacent regions of Bermuda, Florida Keys, and north Caribbean. Our results provide additional 14C data from the WNAO for investigating oceanic water mass age and renewal and a new 14C reference time series for use as an important tool to validate age estimation of SEUS demersal reef fish species. Age estimation methods for SEUS rock hind Epinephelus adscensionis, red hind E. guttatus, and yellowfin grouper Mycteroperca venenosa were successfully validated in this study; SEUS rock hind attained a maximum age of 35 years, extending the longevity of this species in the region from a previous maximum age of 12. Our results also extended maximum ages for SEUS red hind from 11 to 23 years and yellowfin grouper from 31 to 37 years.