“…Soto et al, 2008), the manoeuvres undertaken during prey pursuit (Weihs, 1981;Hughes and Kelly, 1996), and the accelerations and decelerations involved in catching agile and evasive prey (Soto et al, 2008) and during complex feeding mechanisms (Potvin et al, 2009). Other (also non-diving) animals may have energy expenditure affected by humidity (Marhold and Nagel, 1995), pressure (Lovvorn, 1999), salinity (Pechenik et al, 2000) and light intensity (Boshouwers and Nicaise, 1993), as well as by parameters that animals themselves can change such as speed of movement (Rubenson et al, 2004) and climb angle (Laursen et al, 2000). Our ability to integrate all relevant dimensions enables a better assessment of the consequences of any changes in the environment (both biotic and abiotic) to which organisms are exposed, and determine the extent to which the behavioural repertoire displayed in response to changing conditions may be optimal.…”