Does waterproofing Thermochron iButton dataloggers influence temperature readings?

Roznik, Elizabeth A.; Alford, Ross A.

doi:10.1016/j.jtherbio.2012.02.004

Cited by 83 publications

(56 citation statements)

References 34 publications

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“…This can be undertaken in water baths (in the laboratory) or thermos flasks (in the field) or in air in temperature chambers, and is a crucial step to improve the accuracy of temperature data [103]. It is also essential to account for inter-instrument variation whenever multiple instruments are used on a single animal, single instruments are used on many individuals or where many identical temperature-sensing setups are deployed in the same experiment [104]. The importance of calibration drift over time is an important consideration for implanted logging systems and externally mounted radio transmitters [105].…”

Section: Calibration and Data Analysismentioning

confidence: 99%

Challenges of measuring body temperatures of free-ranging birds and mammals

2015

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The thermal physiology of most birds and mammals is characterised by considerable spatial and temporal variation in body temperature. Body temperature is, therefore, a key parameter in physiological, behavioural and ecological research. Temperature measurements on freely moving or free-ranging animals in the wild are challenging but can be undertaken using a range of techniques. Internal temperature may be sampled using thermometry, surgically implanted loggers or transmitters, gastrointestinal or non-surgically placed devices. Less invasive approaches measure peripheral temperature with subcutaneous passive integrated transponder tags or skin surface-mounted radio transmitters and data loggers, or use infrared thermography to record surface temperature. Choice of technique is determined by focal research question and region of interest that reflects appropriate physiological or behavioural causal mechanisms of temperature change, as well as welfare and logistical considerations. Particularly required are further studies that provide opportunities of continuously sampling from multiple sites from within the body. This will increase our understanding of thermoregulation and temperature variation in different parts of the body and how these temperatures may change in response to physiological, behavioural and environmental parameters. Technological advances that continue to reduce the size and remote sensing capability of temperature recorders will greatly benefit field research.

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Section: Calibration and Data Analysismentioning

confidence: 99%

Challenges of measuring body temperatures of free-ranging birds and mammals

2015

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“…Data loggers were either an iButton ® (accuracy of ±1°C or 0.5°C; Thermochron DS1921G; Dallas Semiconductor, Sunnyvale, CA), or a HOBO Stowaway ® (accuracy of ±0.2°C; TidbiT TBI32-05+37; Onset Computer Corp., Bourne, MA). Data logger types and the waterproofing methods did not differ in temperature readings (Roznik and Alford, 2012) (our data: F 3,2480 =2.01, P=0.94). Also, in 2011, a golf Wiffle ® ball (4 cm diameter, Wiffle Ball Inc., Shelton, CT, USA) with 30 cm of tubing (Tygon ® , R-3603, Fisher Scientific, Whitby, ON, Canada) extending into the middle of the Wiffle ® ball was buried in the centre of the nest cavity with tubing extending out of the ground.…”

Section: Field Sampling Nest Site Monitoringmentioning

confidence: 53%

Potential sources of intra-population variation in painted turtle (Chrysemys picta) hatchling overwintering strategy

Riley

Tattersall

Litzgus

2014

Journal of Experimental Biology

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Many temperate animals spend half their lives in a non-active, overwintering state, and multiple adaptations have evolved to enable winter survival. One notable vertebrate model is Chrysemys picta, whose hatchlings display dichotomous overwintering strategies: some hatchlings spend their first winter aquatically after nest emergence in the autumn, whereas others overwinter terrestrially within their natal nest with subsequent emergence in the spring. The occurrence of these strategies varies among populations and temporally within populations; however, factors that determine the strategy employed by a nest in nature are unknown. We examined potential factors that influence intra-population variation in the overwintering strategy of C. picta hatchlings over two winters in Algonquin Park, Ontario. We found that environmental factors may be a trigger for the hatchling overwintering strategy: autumn-emerging nests were sloped towards the water and were surrounded by a relatively higher percentage of bare ground compared with spring-emerging nests. Autumnemerging hatchlings were also relatively smaller. Overwintering strategy was not associated with clutch oviposition sequence, or mammalian or avian predation attempts. Instead, autumn emergence from the nest was associated with the direct mortality threat of predation by sarcophagid fly larvae. Body condition and righting response, measured as proxies of hatchling fitness, did not differ between overwintering strategies. Costs and benefits of overwintering aquatically versus terrestrially in hatchling C. picta are largely unknown, and have the potential to affect population dynamics. Understanding winter survival has great implications for turtle ecology, thus we emphasize areas for future research on dichotomous overwintering strategies in temperate hatchling turtles.

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“…All iButtons were coated with rubber (Plasti Dip, Plasti Dip International, Blaine, Minnesota, USA) and placed in plastic bags prior to deployment to prevent water damage (Roznik and Alford 2012). Two iButtons were used at each wetland.…”

Section: Environmental Temperaturesmentioning

confidence: 99%

Canopy cover and drought influence the landscape epidemiology of an amphibian chytrid fungus

2015

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Abstract. Batrachochytrium dendrobatidis (Bd) is a globally distributed fungal pathogen of amphibians that has caused amphibian population declines. Prevalence and infection intensity of Bd should vary spatially across heterogeneous landscapes because survival of the pathogen depends on environmental conditions including humidity and temperature. Wetland temperatures should vary with forest canopy cover, but few studies have examined the relationship between Bd prevalence and canopy cover. We sampled anurans for Bd at 33 wetlands in Illinois across a canopy cover gradient during the severe drought of 2012 and during more typical weather in 2013. We hypothesized that anurans from closed canopy wetlands would have higher Bd prevalence than anurans from open canopy wetlands because high canopy cover would prevent temperatures from exceeding Bd's critical maximum temperature as often. We used occupancy modeling to examine how Bd prevalence varied spatially in relation to environmental covariates, and to determine if weather conditions altered such relationships. We analyzed all common species combined and Spring Peepers (Pseudacris crucifer) separately. Bd was widespread among the study wetlands. During the drought year of 2012, however, Bd prevalence and infection intensity were substantially reduced. Although wetland temperatures were related negatively to canopy cover, the influence of canopy cover on Bd was complex. Bd prevalence for Spring Peepers was related positively to canopy cover during the drought, but not in the non-drought year. Bd prevalence for all common species was not related positively to canopy cover in either year. Effects of other environmental covariates, such as water depth, also differed between years. Weather conditions had a large impact on Bd infection patterns, which makes predicting pathogen dynamics difficult. In the Midwest region of the United States, climate change models predict more frequent droughts, which may generally inhibit Bd while also altering the effect of environmental factors such as canopy cover on Bd prevalence for amphibians.

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Does waterproofing Thermochron iButton dataloggers influence temperature readings?

Cited by 83 publications

References 34 publications

Challenges of measuring body temperatures of free-ranging birds and mammals

Challenges of measuring body temperatures of free-ranging birds and mammals

Potential sources of intra-population variation in painted turtle (Chrysemys picta) hatchling overwintering strategy

Canopy cover and drought influence the landscape epidemiology of an amphibian chytrid fungus

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