Overinflated behavioural energetics: using dynamic body acceleration to accurately measure behaviour duration and estimate energy expenditure

Abstract : Data loggers that measure acceleration are regularly used to quantify the behavioural energetics of animals. Calculating dynamic body acceleration (DBA) by smoothing acceleration data using a necessarily long-running mean of e.g. ≥1 s (the DBA method) is not appropriate for determining behaviour duration. In fact, the DBA method results in the elongation of behaviour durations (mean ± 95% CI behaviour duration elongation for scallops [n = 10 animals] and humans [n = 10 free-ranging aquatic biologists]: 508.5 ± 277.2 and 19.3 ± 1.1%, respectively) and consequently an overestimation of energy expenditure (mean ± 95% CI activity metabolic rate overestimation: 212.5 ± 48.0 and 6.12 ± 0.34%, for scallops and humans, respectively; overall metabolic rate overestimation: 91.1 ± 29.9 and 4.18 ± 0.20%, for scallops and humans, respectively). Behaviour duration elongation is of greatest significance when behaviour durations are short (minimum, mean and maximum single behaviour duration for scallops and humans recorded in this study: 0.12 and 0.37, 0.40 and 8.04, 0.84 and 185.73 s, respectively). Overestimation of the duration of behaviours naturally causes errors in the calculations of behavioural time-energy budgets for all species that move intermittently, as demonstrated for scallops, crabs, 'amphibious' signal crayfish and humans. Furthermore, behaviours of any duration should be accurately detected, quantified and when appropriate, the behaviour type should be identified. The R package BEnergetix can quickly calculate accurate invertebrate and vertebrate behavioural time−energy budgets from acceleration, metabolic rate and environmental data.
Type de document :
Article dans une revue
Aquatic Biology, Inter-Research, 2014, 21 (2), pp.121-126. 〈10.3354/ab00574〉
Liste complète des métadonnées

http://hal.univ-brest.fr/hal-00988972
Contributeur : Anthony Robson <>
Soumis le : jeudi 3 juillet 2014 - 16:19:19
Dernière modification le : mercredi 10 janvier 2018 - 18:08:12
Document(s) archivé(s) le : vendredi 3 octobre 2014 - 10:36:18

Fichier

2014_Overinflated_behavioural_...
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

Anthony Robson, Robert Mansfield. Overinflated behavioural energetics: using dynamic body acceleration to accurately measure behaviour duration and estimate energy expenditure. Aquatic Biology, Inter-Research, 2014, 21 (2), pp.121-126. 〈10.3354/ab00574〉. 〈hal-00988972〉

Partager

Métriques

Consultations de la notice

569

Téléchargements de fichiers

162