Validation and interpretation of annual skeletal marks in loggerhead (Caretta caretta) and Kemp’s ridley (Lepidochelys kempii) sea turtles
Numerous studies have applied skeletochronology to sea turtle species. Because many of the studies have lacked validation, the application of this technique to sea turtleage estimation has been called into question. To address this concern, we obtained humeri from 13 known-age Kemp’s ridley (Lepidochelys kempii) and two loggerhead (Caretta caretta) sea turtles for the purposes of examining the growth marks and comparing growth mark counts to actual age. We found evidence for annual deposition of growth marks in both these species. Corroborative results were found in Kemp’s ridley sea turtles from a comparison of death date and amount of bone growth following the completion of the last growth mark (n=76). Formation of the lines of arrested growth in Kemp’s ridley sea turtlesconsistently occurred in the spring for animals that strand dead along the mid- and south U.S. Atlantic coast. For both Kemp’s ridley and loggerhead sea turtles, we also found a proportional allometry between bone growth (humerus dimensions) and somatic growth (straight carapace length),indicating that size-at-age and growth rates can be estimated from dimensions of early growth marks. Theseresults validate skeletochronology as a method for estimating age in Kemp’s ridley and loggerhead sea turtles from the southeast United States.
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2004
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Subjects: | Fisheries, Management, |
Online Access: | http://hdl.handle.net/1834/30946 |
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dig-aquadocs-1834-309462021-07-02T03:00:47Z Validation and interpretation of annual skeletal marks in loggerhead (Caretta caretta) and Kemp’s ridley (Lepidochelys kempii) sea turtles Snover, Melissa L. Hohn, Aleta A. Fisheries Management Numerous studies have applied skeletochronology to sea turtle species. Because many of the studies have lacked validation, the application of this technique to sea turtleage estimation has been called into question. To address this concern, we obtained humeri from 13 known-age Kemp’s ridley (Lepidochelys kempii) and two loggerhead (Caretta caretta) sea turtles for the purposes of examining the growth marks and comparing growth mark counts to actual age. We found evidence for annual deposition of growth marks in both these species. Corroborative results were found in Kemp’s ridley sea turtles from a comparison of death date and amount of bone growth following the completion of the last growth mark (n=76). Formation of the lines of arrested growth in Kemp’s ridley sea turtlesconsistently occurred in the spring for animals that strand dead along the mid- and south U.S. Atlantic coast. For both Kemp’s ridley and loggerhead sea turtles, we also found a proportional allometry between bone growth (humerus dimensions) and somatic growth (straight carapace length),indicating that size-at-age and growth rates can be estimated from dimensions of early growth marks. Theseresults validate skeletochronology as a method for estimating age in Kemp’s ridley and loggerhead sea turtles from the southeast United States. 2021-06-24T17:03:31Z 2021-06-24T17:03:31Z 2004 article TRUE 0090-0656 http://hdl.handle.net/1834/30946 en http://fishbull.noaa.gov/1024/snove.pdf application/pdf application/pdf 682-692 http://aquaticcommons.org/id/eprint/15093 403 2014-05-28 03:28:49 15093 United States National Marine Fisheries Service |
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Fisheries Management Fisheries Management Snover, Melissa L. Hohn, Aleta A. Validation and interpretation of annual skeletal marks in loggerhead (Caretta caretta) and Kemp’s ridley (Lepidochelys kempii) sea turtles |
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Numerous studies have applied skeletochronology to sea turtle species. Because many of the studies have lacked validation, the application of this technique to sea turtleage estimation has been called into question. To address this concern, we obtained humeri from 13 known-age Kemp’s ridley (Lepidochelys kempii) and two loggerhead (Caretta caretta) sea turtles for the purposes of examining the growth marks and comparing growth mark counts to actual age. We found evidence for annual deposition of growth marks in both these species. Corroborative results were found in Kemp’s ridley sea turtles from a comparison of death date and amount of bone growth following the completion of the last growth mark (n=76). Formation of the lines of arrested growth in Kemp’s ridley sea turtlesconsistently occurred in the spring for animals that strand dead along the mid- and south U.S. Atlantic coast. For both Kemp’s ridley and loggerhead sea turtles, we also found a proportional allometry between bone growth (humerus dimensions) and somatic growth (straight carapace length),indicating that size-at-age and growth rates can be estimated from dimensions of early growth marks. Theseresults validate skeletochronology as a method for estimating age in Kemp’s ridley and loggerhead sea turtles from the southeast United States. |
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article |
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Fisheries Management |
author |
Snover, Melissa L. Hohn, Aleta A. |
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Snover, Melissa L. Hohn, Aleta A. |
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Snover, Melissa L. |
title |
Validation and interpretation of annual skeletal marks in loggerhead (Caretta caretta) and Kemp’s ridley (Lepidochelys kempii) sea turtles |
title_short |
Validation and interpretation of annual skeletal marks in loggerhead (Caretta caretta) and Kemp’s ridley (Lepidochelys kempii) sea turtles |
title_full |
Validation and interpretation of annual skeletal marks in loggerhead (Caretta caretta) and Kemp’s ridley (Lepidochelys kempii) sea turtles |
title_fullStr |
Validation and interpretation of annual skeletal marks in loggerhead (Caretta caretta) and Kemp’s ridley (Lepidochelys kempii) sea turtles |
title_full_unstemmed |
Validation and interpretation of annual skeletal marks in loggerhead (Caretta caretta) and Kemp’s ridley (Lepidochelys kempii) sea turtles |
title_sort |
validation and interpretation of annual skeletal marks in loggerhead (caretta caretta) and kemp’s ridley (lepidochelys kempii) sea turtles |
publishDate |
2004 |
url |
http://hdl.handle.net/1834/30946 |
work_keys_str_mv |
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