Applicability of Single-Camera Photogrammetry to Determine Body Dimensions of Pinnipeds: Galapagos Sea Lions as an Example

Meise K, Mueller B, Zein B, Trillmich F (2014)
PLoS ONE 9(7): e101197.

Download
OA
Zeitschriftenaufsatz | Veröffentlicht | Englisch
Abstract / Bemerkung
Morphological features correlate with many life history traits and are therefore of high interest to behavioral and evolutionary biologists. Photogrammetry provides a useful tool to collect morphological data from species for which measurements are otherwise difficult to obtain. This method reduces disturbance and avoids capture stress. Using the Galapagos sea lion (Zalophus wollebaeki) as a model system, we tested the applicability of single-camera photogrammetry in combination with laser distance measurement to estimate morphological traits which may vary with an animal’s body position. We assessed whether linear morphological traits estimated by photogrammetry can be used to estimate body length and mass. We show that accurate estimates of body length (males: ±2.0%, females: ±2.6%) and reliable estimates of body mass are possible (males: ±6.8%, females: 14.5%). Furthermore, we developed correction factors that allow the use of animal photos that diverge somewhat from a flat-out position. The product of estimated body length and girth produced sufficiently reliable estimates of mass to categorize individuals into 10 kg-classes of body mass. Data of individuals repeatedly photographed within one season suggested relatively low measurement errors (body length: 2.9%, body mass: 8.1%). In order to develop accurate sex- and age-specific correction factors, a sufficient number of individuals from both sexes and from all desired age classes have to be captured for baseline measurements. Given proper validation, this method provides an excellent opportunity to collect morphological data for large numbers of individuals with minimal disturbance.
Erscheinungsjahr
Zeitschriftentitel
PLoS ONE
Band
9
Zeitschriftennummer
7
Seite
e101197
ISSN
eISSN
Finanzierungs-Informationen
Article Processing Charge funded by the Deutsche Forschungsgemeinschaft and the Open Access Publication Fund of Bielefeld University.
PUB-ID

Zitieren

Meise K, Mueller B, Zein B, Trillmich F. Applicability of Single-Camera Photogrammetry to Determine Body Dimensions of Pinnipeds: Galapagos Sea Lions as an Example. PLoS ONE. 2014;9(7):e101197.
Meise, K., Mueller, B., Zein, B., & Trillmich, F. (2014). Applicability of Single-Camera Photogrammetry to Determine Body Dimensions of Pinnipeds: Galapagos Sea Lions as an Example. PLoS ONE, 9(7), e101197. doi:10.1371/journal.pone.0101197
Meise, K., Mueller, B., Zein, B., and Trillmich, F. (2014). Applicability of Single-Camera Photogrammetry to Determine Body Dimensions of Pinnipeds: Galapagos Sea Lions as an Example. PLoS ONE 9, e101197.
Meise, K., et al., 2014. Applicability of Single-Camera Photogrammetry to Determine Body Dimensions of Pinnipeds: Galapagos Sea Lions as an Example. PLoS ONE, 9(7), p e101197.
K. Meise, et al., “Applicability of Single-Camera Photogrammetry to Determine Body Dimensions of Pinnipeds: Galapagos Sea Lions as an Example”, PLoS ONE, vol. 9, 2014, pp. e101197.
Meise, K., Mueller, B., Zein, B., Trillmich, F.: Applicability of Single-Camera Photogrammetry to Determine Body Dimensions of Pinnipeds: Galapagos Sea Lions as an Example. PLoS ONE. 9, e101197 (2014).
Meise, Kristine, Mueller, Birte, Zein, Beate, and Trillmich, Fritz. “Applicability of Single-Camera Photogrammetry to Determine Body Dimensions of Pinnipeds: Galapagos Sea Lions as an Example”. PLoS ONE 9.7 (2014): e101197.
Alle Dateien verfügbar unter der/den folgenden Lizenz(en):
Copyright Statement:
This Item is protected by copyright and/or related rights. [...]
Volltext(e)
Access Level
OA Open Access
Zuletzt Hochgeladen
2014-09-08T15:33:22Z

1 Zitation in Europe PMC

Daten bereitgestellt von Europe PubMed Central.

35 References

Daten bereitgestellt von Europe PubMed Central.

Long-distance photogrammetric trait estimation in free-ranging animals: a new approach
AUTHOR UNKNOWN, 2013
Body shape changes associated with reproductive status, nutritive condition and growth in right whales Eubalaena glacialis and E. australis
AUTHOR UNKNOWN, 2012

AUTHOR UNKNOWN, 0
Site fidelity of male Galápagos sea lions: a lifetime perspective
AUTHOR UNKNOWN, 2013
Image Processing with ImageJ
AUTHOR UNKNOWN, 2004
Localizing region-based active contours.
Lankton S, Tannenbaum A., IEEE Trans Image Process 17(11), 2008
PMID: 18854247

AUTHOR UNKNOWN, 0

AUTHOR UNKNOWN, 0
Reproductive effort of male northern elephant seals: estimates from mass loss
AUTHOR UNKNOWN, 1990
The energetics of male reproduction in aquatically mating pinniped, the harbour seal
AUTHOR UNKNOWN, 1998

Export

Markieren/ Markierung löschen
Markierte Publikationen

Open Data PUB

Web of Science

Dieser Datensatz im Web of Science®

Quellen

PMID: 24987983
PubMed | Europe PMC

Suchen in

Google Scholar