Activity patterns of bushbuck (Tragelaphus scriptus) in Queen Elizabeth National Park

Wronski, Torsten; Apio, Ann; Plath, Martin

doi:10.1016/j.beproc.2006.08.003

Cited by 32 publications

(29 citation statements)

References 38 publications

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“…The acrophase of lying down and rumination (considered as inactivity as for Bushbuck (Wronski, Apio & Plath, 2006)) occurred at night whereas the acrophase of activities (feeding, stereotypy and walking) occurred during the light phase of the day and, more precisely, around midday. The rhythmicity of rumination is in accordance with the literature; Gordon & McAllister (1970) found a 24 h-period rhythmicity for rumination in sheep, with higher values observed in the second half of a 12 h dark period.…”

Section: Discussionmentioning

confidence: 99%

Daily rhythms of behavioral and hormonal patterns in male dromedary camels housed in boxes

Aubé

Fatnassi

Monaco

et al. 2017

PeerJ

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BackgroundDaily rhythmicity has been observed for a number of hormonal and behavioral variables in mammals. It can be entrained by several external factors, such as light-dark cycle and scheduled feeding. In dromedary camels, daily rhythmicity has been documented only for melatonin secretion and body temperature. In this study, the daily rhythmicity of behavioral repertoire, cortisol and testosterone levels was investigated in captive male camels.MethodsSix clinically healthy male dromedary camels (Camelus dromedarius) were used. The animals were housed in single boxes for 24 h daily and fed twice a day. Over a period of 48 h, behavioral observations were made and blood samples taken every two hours. The data were analyzed using diurnality index, conisor analysis and PROC mixed procedure.ResultsThe diurnality index for rumination and lying down was close to 0 (respectively, 0.09 and 0.19), while the indices for stereotypy, standing, feeding and walking were close to 1 (respectively, 0.74, 0.84, 0.92 and 0.85). Cosinor analysis revealed daily rhythmicity for all behaviors and for cortisol levels (acrophase at 12:57) but not for testosterone. Rumination and lying down (inactive behaviors) reached a peak during the scotophase, whereas feeding, walking and stereotypy (active behaviors) reached a peak during the photophase around midday. Cortisol level and expression of stereotypies peaked before and after food distribution and were negatively correlated (r = − 0.287, P = 0.005). Testosterone levels and expression of sexual behaviors were stimulated by the visual and olfactory contacts with the females and were positively correlated (r = 0.164, P = 0.040). Testosterone was also negatively correlated with cortisol (r = − 0.297; P = 0.003).DiscussionThese preliminary results provided new knowledge about the daily rhythm of behaviors in camels housed in boxes, suggesting that camels exhibit diurnal behavior pattern in the maintenance conditions outlined in the study. Daily rhythmicity seemed to be entrained not only by the light-dark cycle but also by scheduled feeding. The rise in stereotypy after food distribution could be due to the persistence of feeding motivation and frustration after the ingestion of food. Therefore, feeding practices should be improved to satisfy the foraging and feeding motivation of these camels. Behavioral and hormonal daily patterns in camels should be taken in consideration to adapt the management system, giving the animals more freedom during the light period and a diet richer in fiber, so as to improve reproductive performance, health and welfare.

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Section: Discussionmentioning

confidence: 99%

Daily rhythms of behavioral and hormonal patterns in male dromedary camels housed in boxes

Aubé

Fatnassi

Monaco

et al. 2017

PeerJ

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“…For prey, the risk of being ambushed is greater in landscapes with dense vegetation, but so is the ability to hide (Wronski et al 2006). Fischhoff et al (2007) Canis lupus, than is the surrounding open landscape (Creel et al 2005;Hernandez & Laundre 2005), and it is likely that the bene-fits of hiding outweigh the risks of ambush by other cursorial predators such as wild dogs, Lycaon pictus.…”

Section: Discussionmentioning

confidence: 99%

Lion hunting behaviour and vegetation structure in an African savanna

2013

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Keywords:Bayesian statistics Carnegie Airborne Observatory GPS telemetry LiDAR lion Panthera leo predatoreprey interaction vegetation structure Emerging evidence suggests that male lions are not dependent on female's hunting skills but are in fact successful hunters. But difficulty locating kills and objectively characterizing landscapes has complicated the comparison of male and female lion hunting strategies. We used airborne Light Detection and Ranging (LiDAR) measurements of vegetation structure in Kruger National Park, combined with global positioning system (GPS) telemetry data on lion, Panthera leo, kills to quantify lines-of-sight where lion kills occurred compared with areas where lions rested, while controlling for time of day. We found significant differences in use of vegetation structure by male and female lions during hunts. While male lions killed in landscapes with much shorter linesof-sight (16.2 m) than those in which they rested, there were no significant differences for female lions. These results were consistent across sizes of prey species. The influence of vegetation structure in shaping predatoreprey interactions is often hypothe-sized, but quantitative evidence has been scarce. Although our sample sizes were limited, our results provide a mechanism, ambush hunting versus social hunting in the open, to explain why hunting success of male lions might equal that of females. This study serves as a case study for more complete studies with larger samples sizes and illustrates how LiDAR and GPS telemetry can be used to provide new insight into lion hunting behaviour.

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“…Night was defined as the period included between 1.5 hours after the sunset and 1.5 hours before the sunrise (cf. Wronski et al, 2006).…”

Section: Methodsmentioning

confidence: 95%

Nocturnal activity of a “diurnal” species, the northern chamois, in a predator-free Alpine area

Carnevali

Lovari

Monaco

et al. 2016

Behavioural Processes

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Activity patterns of bushbuck (Tragelaphus scriptus) in Queen Elizabeth National Park

Cited by 32 publications

References 38 publications

Daily rhythms of behavioral and hormonal patterns in male dromedary camels housed in boxes

Daily rhythms of behavioral and hormonal patterns in male dromedary camels housed in boxes

Lion hunting behaviour and vegetation structure in an African savanna

Nocturnal activity of a “diurnal” species, the northern chamois, in a predator-free Alpine area

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