Aging Juvenile Gulf Sturgeon From the Apalachicola River System, Florida
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| Language: | English |
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Miami University / OhioLINK
2018
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=miami1527187111928485 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-miami15271871119284852021-08-03T07:07:09Z Aging Juvenile Gulf Sturgeon From the Apalachicola River System, Florida Moran, Kate Anne Fish Production Wildlife Management Wildlife Conservation Aging juvenile Gulf Sturgeon Gulf Sturgeon Fisheries Management Fin Ray Aging Length Frequency Juvenile Recruitment Little is known about the juvenile stage of the Gulf Sturgeon, Acipenser oxyrinchus desotoi, and a validated and verified aging method is imperative for understanding juvenile recruitment. In this study, the second marginal pectoral fin ray was used to age 145 juvenile Gulf Sturgeon, and these ages were validated using oxytetracycline and mark-recapture of known-age fish. Aging by fin ray is time-consuming and expensive, so the use of length-frequency analysis was also examined as a potential aging method. The length-frequency analysis was 83% accurate when assigning ages. The likelihood of age misclassification increases as sturgeon become older and longer, so cohort abundance estimations for both the length- frequency assigned age and the fin ray-determined age were calculated to identify the impact of misclassification. In cohorts with high rates of misclassification, the abundance estimates using the length-frequency age assignments were higher than those using fin-ray determined ages. Scientists working with Gulf Sturgeon should sample fin-rays to age juvenile sturgeon at least every three years and use length-frequency analysis to assign ages between years. Managers should also standardize the use of the second marginal pectoral fin ray as an aging structure for juvenile Gulf Sturgeon. 2018-05-25 English text Miami University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=miami1527187111928485 http://rave.ohiolink.edu/etdc/view?acc_num=miami1527187111928485 restricted--full text unavailable until 2023-05-25 This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Fish Production Wildlife Management Wildlife Conservation Aging juvenile Gulf Sturgeon Gulf Sturgeon Fisheries Management Fin Ray Aging Length Frequency Juvenile Recruitment |
| spellingShingle |
Fish Production Wildlife Management Wildlife Conservation Aging juvenile Gulf Sturgeon Gulf Sturgeon Fisheries Management Fin Ray Aging Length Frequency Juvenile Recruitment Moran, Kate Anne Aging Juvenile Gulf Sturgeon From the Apalachicola River System, Florida |
| author |
Moran, Kate Anne |
| author_facet |
Moran, Kate Anne |
| author_sort |
Moran, Kate Anne |
| title |
Aging Juvenile Gulf Sturgeon From the Apalachicola River System, Florida |
| title_short |
Aging Juvenile Gulf Sturgeon From the Apalachicola River System, Florida |
| title_full |
Aging Juvenile Gulf Sturgeon From the Apalachicola River System, Florida |
| title_fullStr |
Aging Juvenile Gulf Sturgeon From the Apalachicola River System, Florida |
| title_full_unstemmed |
Aging Juvenile Gulf Sturgeon From the Apalachicola River System, Florida |
| title_sort |
aging juvenile gulf sturgeon from the apalachicola river system, florida |
| publisher |
Miami University / OhioLINK |
| publishDate |
2018 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=miami1527187111928485 |
| work_keys_str_mv |
AT morankateanne agingjuvenilegulfsturgeonfromtheapalachicolariversystemflorida |
| _version_ |
1719453977229131776 |