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Increasing Accuracy: A New Design and Algorithm for Automatically Measuring Weights, Travel Direction and Radio Frequency Identification (RFID) of Penguins.

Afanasyev V, Buldyrev SV, Dunn MJ, Robst J, Preston M, Bremner SF, Briggs DR, Brown R, Adlard S, Peat HJ - PLoS ONE (2015)

Bottom Line: Reliable discrimination between single and multiple penguin crossings is demonstrated.Users are able to define required levels of accuracy by adjusting filters and raw data are automatically recorded and stored allowing for a range of processing options.This paper presents the underlying principles, design specification and system description, provides evidence of the weighbridge's accurate performance and demonstrates how its design is a significant improvement on existing systems.

View Article: PubMed Central - PubMed

Affiliation: British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge, CB30ET, United Kingdom.

ABSTRACT
A fully automated weighbridge using a new algorithm and mechanics integrated with a Radio Frequency Identification System is described. It is currently in use collecting data on Macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia. The technology allows researchers to collect very large, highly accurate datasets of both penguin weight and direction of their travel into or out of a breeding colony, providing important contributory information to help understand penguin breeding success, reproductive output and availability of prey. Reliable discrimination between single and multiple penguin crossings is demonstrated. Passive radio frequency tags implanted into penguins allow researchers to match weight and trip direction to individual birds. Low unit and operation costs, low maintenance needs, simple operator requirements and accurate time stamping of every record are all important features of this type of weighbridge, as is its proven ability to operate 24 hours a day throughout a breeding season, regardless of temperature or weather conditions. Users are able to define required levels of accuracy by adjusting filters and raw data are automatically recorded and stored allowing for a range of processing options. This paper presents the underlying principles, design specification and system description, provides evidence of the weighbridge's accurate performance and demonstrates how its design is a significant improvement on existing systems.

No MeSH data available.


Related in: MedlinePlus

Dynamometer versus weighbridge weights.A comparison of weights calculated from weighbridge crossings with the mass of the same penguin obtained using a spring dynamometer once the penguin had crossed the bridge.
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pone.0126292.g008: Dynamometer versus weighbridge weights.A comparison of weights calculated from weighbridge crossings with the mass of the same penguin obtained using a spring dynamometer once the penguin had crossed the bridge.

Mentions: Each year a small number of penguins were caught once they had crossed the weighbridge, and weighed manually using a spring dynamometer. The manual weights and weights calculated from the weighbridge were compared. A comparison of dynamometer and weighbridge weights for 79 penguins from three seasons is shown in Fig 8. There is very strong agreement between the two methods across the whole range of possible penguin weights. The difference between the two methods ranged from 1 g to 169 g, with a mean of 42 g. As the spring dynamometer only record weights to the nearest 50 g, and can be affected by factors such as penguin movement in the restraining bag, wind and build up of dirt in the bag, then the significant agreement between manual and weighbridge weights suggests that we can have confidence that the weights calculated from the weighbridge files are indeed accurate.


Increasing Accuracy: A New Design and Algorithm for Automatically Measuring Weights, Travel Direction and Radio Frequency Identification (RFID) of Penguins.

Afanasyev V, Buldyrev SV, Dunn MJ, Robst J, Preston M, Bremner SF, Briggs DR, Brown R, Adlard S, Peat HJ - PLoS ONE (2015)

Dynamometer versus weighbridge weights.A comparison of weights calculated from weighbridge crossings with the mass of the same penguin obtained using a spring dynamometer once the penguin had crossed the bridge.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4404094&req=5

pone.0126292.g008: Dynamometer versus weighbridge weights.A comparison of weights calculated from weighbridge crossings with the mass of the same penguin obtained using a spring dynamometer once the penguin had crossed the bridge.
Mentions: Each year a small number of penguins were caught once they had crossed the weighbridge, and weighed manually using a spring dynamometer. The manual weights and weights calculated from the weighbridge were compared. A comparison of dynamometer and weighbridge weights for 79 penguins from three seasons is shown in Fig 8. There is very strong agreement between the two methods across the whole range of possible penguin weights. The difference between the two methods ranged from 1 g to 169 g, with a mean of 42 g. As the spring dynamometer only record weights to the nearest 50 g, and can be affected by factors such as penguin movement in the restraining bag, wind and build up of dirt in the bag, then the significant agreement between manual and weighbridge weights suggests that we can have confidence that the weights calculated from the weighbridge files are indeed accurate.

Bottom Line: Reliable discrimination between single and multiple penguin crossings is demonstrated.Users are able to define required levels of accuracy by adjusting filters and raw data are automatically recorded and stored allowing for a range of processing options.This paper presents the underlying principles, design specification and system description, provides evidence of the weighbridge's accurate performance and demonstrates how its design is a significant improvement on existing systems.

View Article: PubMed Central - PubMed

Affiliation: British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge, CB30ET, United Kingdom.

ABSTRACT
A fully automated weighbridge using a new algorithm and mechanics integrated with a Radio Frequency Identification System is described. It is currently in use collecting data on Macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia. The technology allows researchers to collect very large, highly accurate datasets of both penguin weight and direction of their travel into or out of a breeding colony, providing important contributory information to help understand penguin breeding success, reproductive output and availability of prey. Reliable discrimination between single and multiple penguin crossings is demonstrated. Passive radio frequency tags implanted into penguins allow researchers to match weight and trip direction to individual birds. Low unit and operation costs, low maintenance needs, simple operator requirements and accurate time stamping of every record are all important features of this type of weighbridge, as is its proven ability to operate 24 hours a day throughout a breeding season, regardless of temperature or weather conditions. Users are able to define required levels of accuracy by adjusting filters and raw data are automatically recorded and stored allowing for a range of processing options. This paper presents the underlying principles, design specification and system description, provides evidence of the weighbridge's accurate performance and demonstrates how its design is a significant improvement on existing systems.

No MeSH data available.


Related in: MedlinePlus