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| Jolivet, Aurelie; Chauvaud, Laurent; Thebault, Julien; Robson, Anthony A.; Dumas, Pascal; Amos, George; Lorrain, Anne. |
| Background : Behaviour and time spent active and inactive are key factors in animal ecology, with important consequences for bioenergetics. For the first time, here, we equipped the gastropod Tectus (= Trochus) niloticus with accelerometers to describe activity rhythms at two sites in the Southwest Pacific with different temperature regimes: New Caledonia and Vanuatu. Results : Based on a 24-hour cycle, T. niloticus activity began at dusk and gradually stopped during the night, before sunrise. This nocturnal behaviour was characterised by short (duration <30 s), low intensity (acceleration < 0.12 ɡ) movements and was probably associated with foraging behaviour. We assumed that activity ceased once the animal was satiated. Our analysis of two size... |
| Tipo: Text |
Palavras-chave: Activity; Accelerometry; 24-hour periodicity; Tectus niloticus; Foraging; Migration. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00295/40658/39640.pdf |
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| Robson, Anthony A.; Halsey, Lewis G.; Chauvaud, Laurent. |
| The effects of unnatural disturbances on the behaviour and energetics of animals are an important issue for conservation and commercial animal production. Biologging enables estimation of the energy costs of these disturbances, but not specifically the effect these costs have on growth; a key outcome measure for animal farming enterprises. We looked at how natural and anthropogenically induced activity and energy expenditure of king scallops Pecten maximus varies with temperature. These data were then used to model growth time of king scallops reared in an aquaculture facility under different temperatures and anthropogenic disturbance levels. The scallops exhibited a typical total metabolic rate (MR)-temperature curve, with a peak reached at a middling... |
| Tipo: Text |
Palavras-chave: Growth; Temperature; Anthropogenic disturbance; Activity; Metabolic rate; Energy expenditure. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00344/45561/72893.pdf |
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