Shape Analysis of Otoliths—a Tool for Indirect Ageing of Eel, Anguilla anguilla (L.)?
Abstract Eel otolith shapes can be separated into distinct groups which can be assigned to certain age groups. The shape is described exactly through Fourier series using the maximum‐projection‐area. Clusters formed by the magnitudes of Fourier descriptors agreed with age groups of three year interv...
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Language: | English |
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Online Access: | http://dx.doi.org/10.1002/iroh.19900750607 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Firoh.19900750607 https://onlinelibrary.wiley.com/doi/pdf/10.1002/iroh.19900750607 |
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crwiley:10.1002/iroh.19900750607 2024-06-02T07:55:09+00:00 Shape Analysis of Otoliths—a Tool for Indirect Ageing of Eel, Anguilla anguilla (L.)? Doering, Peer Ludwig, Jürgen 1990 http://dx.doi.org/10.1002/iroh.19900750607 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Firoh.19900750607 https://onlinelibrary.wiley.com/doi/pdf/10.1002/iroh.19900750607 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Internationale Revue der gesamten Hydrobiologie und Hydrographie volume 75, issue 6, page 737-743 ISSN 0020-9309 journal-article 1990 crwiley https://doi.org/10.1002/iroh.19900750607 2024-05-03T11:38:02Z Abstract Eel otolith shapes can be separated into distinct groups which can be assigned to certain age groups. The shape is described exactly through Fourier series using the maximum‐projection‐area. Clusters formed by the magnitudes of Fourier descriptors agreed with age groups of three year intervals by 66% (kappa = · 522, p <.001). Artificial shapes for the resulting clusters were constructed from the mean Fourier descriptors. Further studies with eels of known age are needed to validate shape analysis of otoliths as an objective measure for indirect ageing. Article in Journal/Newspaper Anguilla anguilla Wiley Online Library Internationale Revue der gesamten Hydrobiologie und Hydrographie 75 6 737 743 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Eel otolith shapes can be separated into distinct groups which can be assigned to certain age groups. The shape is described exactly through Fourier series using the maximum‐projection‐area. Clusters formed by the magnitudes of Fourier descriptors agreed with age groups of three year intervals by 66% (kappa = · 522, p <.001). Artificial shapes for the resulting clusters were constructed from the mean Fourier descriptors. Further studies with eels of known age are needed to validate shape analysis of otoliths as an objective measure for indirect ageing. |
format |
Article in Journal/Newspaper |
author |
Doering, Peer Ludwig, Jürgen |
spellingShingle |
Doering, Peer Ludwig, Jürgen Shape Analysis of Otoliths—a Tool for Indirect Ageing of Eel, Anguilla anguilla (L.)? |
author_facet |
Doering, Peer Ludwig, Jürgen |
author_sort |
Doering, Peer |
title |
Shape Analysis of Otoliths—a Tool for Indirect Ageing of Eel, Anguilla anguilla (L.)? |
title_short |
Shape Analysis of Otoliths—a Tool for Indirect Ageing of Eel, Anguilla anguilla (L.)? |
title_full |
Shape Analysis of Otoliths—a Tool for Indirect Ageing of Eel, Anguilla anguilla (L.)? |
title_fullStr |
Shape Analysis of Otoliths—a Tool for Indirect Ageing of Eel, Anguilla anguilla (L.)? |
title_full_unstemmed |
Shape Analysis of Otoliths—a Tool for Indirect Ageing of Eel, Anguilla anguilla (L.)? |
title_sort |
shape analysis of otoliths—a tool for indirect ageing of eel, anguilla anguilla (l.)? |
publisher |
Wiley |
publishDate |
1990 |
url |
http://dx.doi.org/10.1002/iroh.19900750607 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Firoh.19900750607 https://onlinelibrary.wiley.com/doi/pdf/10.1002/iroh.19900750607 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Internationale Revue der gesamten Hydrobiologie und Hydrographie volume 75, issue 6, page 737-743 ISSN 0020-9309 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/iroh.19900750607 |
container_title |
Internationale Revue der gesamten Hydrobiologie und Hydrographie |
container_volume |
75 |
container_issue |
6 |
container_start_page |
737 |
op_container_end_page |
743 |
_version_ |
1800746262286303232 |