Estimating activity of Japanese macaques (<i>Macaca fuscata</i>) using accelerometers

Sha, John Chih Mun; Kaneko, Akihisa; Suda‐Hashimoto, Naoko; He, Tianmeng; Take, Makiko; Zhang, Peng; Hanya, Goro

doi:10.1002/ajp.22694

Cited by 5 publications

(3 citation statements)

References 62 publications

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“…Monitoring the activity of animals using non-invasive technologies such as accelerometer sensors can provide an indicator of an individual's response to its external or internal environment [1]. These technologies are widely used in wildlife ecology studies [2][3][4][5] and in an increasing number of animal science studies [6][7][8][9][10][11][12][13] to infer the behavioural responses of host animals to their environment.…”

Section: Introductionmentioning

confidence: 99%

What Are Sheep Doing? Tri-Axial Accelerometer Sensor Data Identify the Diel Activity Pattern of Ewe Lambs on Pasture

Ikurior

Marquetoux

Leu

et al. 2021

Sensors

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Monitoring activity patterns of animals offers the opportunity to assess individual health and welfare in support of precision livestock farming. The purpose of this study was to use a triaxial accelerometer sensor to determine the diel activity of sheep on pasture. Six Perendale ewe lambs, each fitted with a neck collar mounting a triaxial accelerometer, were filmed during targeted periods of sheep activities: grazing, lying, walking, and standing. The corresponding acceleration data were fitted using a Random Forest algorithm to classify activity (=classifier). This classifier was then applied to accelerometer data from an additional 10 ewe lambs to determine their activity budgets. Each of these was fitted with a neck collar mounting an accelerometer as well as two additional accelerometers placed on a head halter and a body harness over the shoulders of the animal. These were monitored continuously for three days. A classification accuracy of 89.6% was achieved for the grazing, walking and resting activities (i.e., a new class combining lying and standing activity). Triaxial accelerometer data showed that sheep spent 64% (95% CI 55% to 74%) of daylight time grazing, with grazing at night reduced to 14% (95% CI 8% to 20%). Similar activity budgets were achieved from the halter mounted sensors, but not those on a body harness. These results are consistent with previous studies directly observing daily activity of pasture-based sheep and can be applied in a variety of contexts to investigate animal health and welfare metrics e.g., to better understand the impact that young sheep can suffer when carrying even modest burdens of parasitic nematodes.

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Section: Introductionmentioning

confidence: 99%

What Are Sheep Doing? Tri-Axial Accelerometer Sensor Data Identify the Diel Activity Pattern of Ewe Lambs on Pasture

Ikurior

Marquetoux

Leu

et al. 2021

Sensors

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“…The study site at Tiputini is a very rich equatorial habitat without a pronounced dry season, but it still has moderate seasonal variation of important environmental factors. Our future analyses will include study of the activity patterns of the monkeys at Tiputini over the course of the 24 h diel cycle [86–88] to test hypotheses about their temporal partitioning of the day and strategies for coping with environmental variation and resource seasonality. We are also characterizing the photopigment opsins of the monkeys [55] so that we can clarify the relationships between color vision phenotype, feeding ecology, and niche partitioning.…”

Section: Discussionmentioning

confidence: 99%

Initiation of feeding by four sympatric Neotropical primates (Ateles belzebuth, Lagothrix lagotricha poeppigii, Plecturocebus (Callicebus) discolor, and Pithecia aequatorialis) in Amazonian Ecuador: Relationships to photic and ecological factors

et al. 2019

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We examined photic and ecological factors related to initiation of feeding by four sympatric primates in the rain forest of Amazonian Ecuador. With rare exceptions, morning activities of all taxa began only after the onset of nautical twilight, which occurred 47–48 min before sunrise. The larger spider and woolly monkeys, Ateles belzebuth and Lagothrix lagotricha poeppigii, left their sleeping trees before sunrise about half the time, while the smaller sakis and titi monkeys, Pithecia aequatorialis and Plecturocebus (formerly Callicebus) discolor, did not emerge until sunrise or later. None of the four taxa routinely began feeding before sunrise. Pithecia began feeding a median 2.17 h after sunrise, at least 0.8 h later than the median feeding times of the other three taxa. The early movement of Ateles and Lagothrix, and late initiation of feeding by Pithecia are consistent with temporal niche partitioning. Among most New World primate species, all males and many females, have dichromatic color vision, with only two cone photopigments, while some females are trichromats with three cone photopigments. Current evidence indicates that the dichromats have a foraging advantage in dim light, which could facilitate utilization of twilight periods and contribute to temporal niche partitioning. However, in our study, dichromatic males did not differentially exploit the dim light of twilight, and times of first feeding bouts of female Ateles and Lagothrix were similar to those of males. First feeding bouts followed a seasonal pattern, occurring latest in May-August, when ripe fruit abundance and ambient temperature were both relatively low. The most frugivorous taxon, Ateles, exhibited the greatest seasonality, initiating feeding 1.4 h later in May-August than in January-April. This pattern may imply a strategy of conserving energy when ripe fruit is scarcer, but starting earlier to compete successfully when fruit is more abundant. Lower temperatures were associated with later feeding of Ateles (by 26 min / °C) and perhaps Pithecia, but not Lagothrix or Plecturocebus. The potential for modification of temporal activity patterns and temporal niche partitioning by relatively small changes in temperature should be considered when predicting the effects of climate change.

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“…However, long-term changes in activity are difficult to detect via direct observation and could be subject to observer bias. Wearable, tri-axial accelerometers are commonly used to quantify activity and behaviour changes in animals [ 8 , 9 ] by measuring changes in direction and intensity of movement. Higher intensity movements are associated with higher levels of acceleration and deceleration.…”

Section: Introductionmentioning

confidence: 99%

A standardised approach to quantifying activity in domestic dogs

Karimjee,

Harron,

Piercy

et al. 2024

R. Soc. Open Sci.

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Objective assessment of activity via accelerometry can provide valuable insights into dog health and welfare. Common activity metrics involve using acceleration cut-points to group data into intensity categories and reporting the time spent in each category. Lack of consistency and transparency in cut-point derivation makes it difficult to compare findings between studies. We present an alternative metric for use in dogs: the acceleration threshold (as a fraction of standard gravity, 1 g = 9.81 m/s 2 ) above which the animal's X most active minutes are accumulated (MX ACC ) over a 24-hour period. We report M2 ACC, M30 ACC and M60 ACC data from a colony of healthy beagles ( n = 6) aged 3–13 months. To ensure that reference values are applicable across a wider dog population, we incorporated labelled data from beagles and volunteer pet dogs ( n = 16) of a variety of ages and breeds. The dogs' normal activity patterns were recorded at 200 Hz for 24 hours using collar-based Axivity-AX3 accelerometers. We calculated acceleration vector magnitude and MX ACC metrics. Using labelled data from both beagles and pet dogs, we characterize the range of acceleration outputs exhibited enabling meaningful interpretation of MX ACC . These metrics will help standardize measurement of canine activity and serve as outcome measures for veterinary and translational research.

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Estimating activity of Japanese macaques (Macaca fuscata) using accelerometers

Cited by 5 publications

References 62 publications

What Are Sheep Doing? Tri-Axial Accelerometer Sensor Data Identify the Diel Activity Pattern of Ewe Lambs on Pasture

What Are Sheep Doing? Tri-Axial Accelerometer Sensor Data Identify the Diel Activity Pattern of Ewe Lambs on Pasture

Initiation of feeding by four sympatric Neotropical primates (Ateles belzebuth, Lagothrix lagotricha poeppigii, Plecturocebus (Callicebus) discolor, and Pithecia aequatorialis) in Amazonian Ecuador: Relationships to photic and ecological factors

A standardised approach to quantifying activity in domestic dogs

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