Using form analysis techniques to improve photogrammetric mass‐estimation methods
Abstract Numerical characterization of animal body forms using elliptical Fourier decomposition may be a useful analytic technique in a variety of marine mammal investigations. Using data collected from the Weddell seal ( Leptonychotes weddellii ), we describe the method of body form characterizatio...
Published in: | Marine Mammal Science |
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crwiley:10.1111/j.1748-7692.2007.00171.x 2023-12-03T10:31:37+01:00 Using form analysis techniques to improve photogrammetric mass‐estimation methods Proffitt, Kelly M. Garrott, Robert A. Rotella, Jay J. Lele, Subhash 2007 http://dx.doi.org/10.1111/j.1748-7692.2007.00171.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.2007.00171.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.2007.00171.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 24, issue 1, page 147-158 ISSN 0824-0469 1748-7692 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2007 crwiley https://doi.org/10.1111/j.1748-7692.2007.00171.x 2023-11-09T13:34:57Z Abstract Numerical characterization of animal body forms using elliptical Fourier decomposition may be a useful analytic technique in a variety of marine mammal investigations. Using data collected from the Weddell seal ( Leptonychotes weddellii ), we describe the method of body form characterization using elliptical Fourier analysis and demonstrated usefulness of the technique in photogrammetric mass‐estimation modeling. We compared photogrammetric mass‐estimation models developed from (1) standard morphometric measurement covariates, (2) elliptical Fourier coefficient covariates, and (3) a combination of morphometric and Fourier coefficient covariates and found that mass‐estimation models employing a combination of morphometric measurements and Fourier coefficients outperformed models containing only one covariate type. Inclusion of Fourier coefficients in photogrammetric mass‐estimation models employing standard morphometric measurements reduced the width of the prediction interval by 24.4%. Increased precision of photogrammetric mass‐estimation models employing Fourier coefficients as model covariates may expand the range of ecological questions that can be addressed with estimated mass measurements. Article in Journal/Newspaper Weddell Seal Wiley Online Library (via Crossref) Weddell Marine Mammal Science 24 1 147 158 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Proffitt, Kelly M. Garrott, Robert A. Rotella, Jay J. Lele, Subhash Using form analysis techniques to improve photogrammetric mass‐estimation methods |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Numerical characterization of animal body forms using elliptical Fourier decomposition may be a useful analytic technique in a variety of marine mammal investigations. Using data collected from the Weddell seal ( Leptonychotes weddellii ), we describe the method of body form characterization using elliptical Fourier analysis and demonstrated usefulness of the technique in photogrammetric mass‐estimation modeling. We compared photogrammetric mass‐estimation models developed from (1) standard morphometric measurement covariates, (2) elliptical Fourier coefficient covariates, and (3) a combination of morphometric and Fourier coefficient covariates and found that mass‐estimation models employing a combination of morphometric measurements and Fourier coefficients outperformed models containing only one covariate type. Inclusion of Fourier coefficients in photogrammetric mass‐estimation models employing standard morphometric measurements reduced the width of the prediction interval by 24.4%. Increased precision of photogrammetric mass‐estimation models employing Fourier coefficients as model covariates may expand the range of ecological questions that can be addressed with estimated mass measurements. |
format |
Article in Journal/Newspaper |
author |
Proffitt, Kelly M. Garrott, Robert A. Rotella, Jay J. Lele, Subhash |
author_facet |
Proffitt, Kelly M. Garrott, Robert A. Rotella, Jay J. Lele, Subhash |
author_sort |
Proffitt, Kelly M. |
title |
Using form analysis techniques to improve photogrammetric mass‐estimation methods |
title_short |
Using form analysis techniques to improve photogrammetric mass‐estimation methods |
title_full |
Using form analysis techniques to improve photogrammetric mass‐estimation methods |
title_fullStr |
Using form analysis techniques to improve photogrammetric mass‐estimation methods |
title_full_unstemmed |
Using form analysis techniques to improve photogrammetric mass‐estimation methods |
title_sort |
using form analysis techniques to improve photogrammetric mass‐estimation methods |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1748-7692.2007.00171.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.2007.00171.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.2007.00171.x |
geographic |
Weddell |
geographic_facet |
Weddell |
genre |
Weddell Seal |
genre_facet |
Weddell Seal |
op_source |
Marine Mammal Science volume 24, issue 1, page 147-158 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1748-7692.2007.00171.x |
container_title |
Marine Mammal Science |
container_volume |
24 |
container_issue |
1 |
container_start_page |
147 |
op_container_end_page |
158 |
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1784257970665684992 |