![]() Due to the importance of energy balance in species survival, a variety of methods have been developed to measure animal energy expenditure in the field using electronic logging and tracking devices (Wilmers et al., 2015). Specifically, measures of energy expenditure can provide insight about the mechanisms by which animals respond to environmental change on both short‐ and long‐term scales (Wikelski & Cooke, 2006). Our findings highlight the strengths and limitations in dynamic body acceleration as a measure of total energy expenditure while also further supporting its use as a proxy for instantaneous, detailed energy expenditure in free‐ranging animals.Įnergy expenditure is fundamental to animal movement ecology and influences survival and reproductive success and, hence, population dynamics (Brown, Gillooly, Allen, Savage, & West, 2004). ![]() Nevertheless, accelerometer‐based measures of energy expenditure strongly correlated ( r 2 = 0.70) with measures derived from doubly labeled water. Accelerometer‐based estimates of energy expenditure on average predicted total energy expenditure to be 30% less than estimates derived from doubly labeled water. Energetic models based on accelerometry were compared to models of energy expenditure on the same individuals derived from doubly labeled water methods. Here, we use relationships between oxygen consumption and overall dynamic body acceleration in resting and walking polar bears Ursus maritimus and published values for the costs of swimming in polar bears to estimate the total energy expenditure of 6 free‐ranging polar bears that were primarily using the sea ice of the Beaufort Sea. Although dynamic body acceleration has been shown to strongly correlate with oxygen consumption in captive animals, it has been validated in only a few studies on free‐ranging animals. Advancements in biologging technologies have enabled the use of dynamic body acceleration derived from accelerometers as a proxy for energy expenditure. If you send your CCC backup over flaky link to rotten storage it’s would not be not CCCs fault if it would fail to restore data.Measures of energy expenditure can be used to inform animal conservation and management, but methods for measuring the energy expenditure of free‐ranging animals have a variety of limitations. So I don’t buy “Gaaaa time machine is broken/poorly designed/has a fatal flaw” outrages. It’s backing up my today’s changes from the MacBook Pro as I’m typing this. In 100% of cases when someone complained about time machine reliability digging into the issue the culprit invariably turn out to be hardware or configuration issue outside of time machine, which upon correcting eliminates the problem entirely.Īs an anecdote my current TM Bundle was created in 2009 on 2008 MacBook Pro with Snow Leopard, outlived all the rest of my devices and few weeks ago I migrated my 2018 Mac to 2019 one with Catalina using that bundle. Time machine works fine if target storage is properly configured. And it's harder to use if need to restore to bare metal. A simple error makes the NAS based image un-usable and very difficult to repair. Far to many issues and loss of data.TimeMachine's weakness is the way it stores data. ![]() There is also no 'Bonjour Carbon Copy Cloner Broadcasting', and I was concerned I would manually have to connect and run the backups, which would limit their benefit to me. That said I was hoping to hear more people's experiences of using CCC to make network backups. It's still a benefit to me to have over-the-air backups whilst I'm on my home network though (making CCC backups/clones requires I physically connect an external SSD, which I don't currently do more than once a week), and so it makes sense to add Time Machine as an extra backup. I am leaning towards using Time Machine in addition to my current back up strategy as a) you can't (easily) boot using a network clone and b) a lot of commentators seemed to have had issues with Time Machine backups corrupting. Having a bootable backup thanks to CCC was a life-saver as I could continue working directly from it using another Mac. Yeah a couple of months ago my motherboard failed and I had to have the whole laptop replaced by Apple.
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