Farmed red deer home range, habitat use and daily movement patterns in a Southland, New Zealand, tussock grassland over calving and lactation

Wall, A. J.; Asher, G. W.; Netzer, Michael; Johnson, Marion; O'Neill, K.T.; Littlejohn, R. P.; Cox, N. R.

doi:10.1071/an17516

Cited by 5 publications

(3 citation statements)

References 49 publications

(58 reference statements)

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“…This research proved the central hypothesis of consistent variation in foraging behaviour among sire lines but did not prove the hypothesis that behaviour influences liveweight gain. All animals on both treatments experienced dawn and dusk peaks in activity, as previously demonstrated in red deer (Hester et al 1996;Pépin et al 2006;Ensing et al 2014;Wall et al 2019). However, the diurnal pattern of activity appears to be different for the two groups, with the kale group having an extended morning activity period, followed by a distinct lack of activity until the evening period.…”

Section: Discussionsupporting

confidence: 65%

“…Several genetic markers have been found that explained up to 24% of the phenotypic variation in terrain use by cattle (Bailey et al 2015) and foraging behaviour has consistently been shown to differ among breeds within a species (Bailey et al 2001;Russell et al 2010;Aharoni et al 2013;Dolev et al 2014;Nyamuryekung'e et al 2021) and among individuals within a population of the same breed (Michelena et al 2009;Sibbald et al 2009;di Virgilio and Morales 2016). The variation in foraging behaviour in red deer has not been investigated in any detail; however, Wall et al (2019) demonstrated that different individuals utilised different vegetation zones within a large herd of farmed red deer, indicating that variation in resource utilisation does occur.…”

Section: Introductionmentioning

confidence: 99%

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GPS-derived foraging behaviour of red deer and liveweight gain of red deer and wapiti crossbred sire lines on contrasting winter forage types

et al. 2023

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Context It is common practice to manage red deer on highly digestible easily harvested forage during winter on New Zealand deer farms, particularly in areas that experience low or no pasture growth during this period. However, not all individuals within these production systems perform equally. Aims To investigate foraging behaviour of young red deer and liveweight gain of young red deer and wapiti crossbred sire lines when offered two contrasting winter forage diets. Methods One hundred and sixty-three rising 1-year-old female red deer and red deer wapiti crossbreds representing five red deer and two wapiti sires, were split into two management groups balanced by sire and liveweight and managed on either an easily harvested highly digestible diet (forage kale) or a harder-to-harvest more poorly digestible diet (pasture) for a 6-week period during winter. Foraging behaviour was monitored on 95 red deer yearlings by using GPS collars over a 2-week period. Liveweights were recorded at the start and end of the 6-week period. Key results Progeny managed on the kale treatment exhibited an extended activity period during the dawn period and a suppressed activity period during the middle of the day. Progeny managed on the pasture treatment exhibited frequent shorter activity periods from dawn to dusk. Time spent foraging and the number of foraging bouts greater than 5 min in duration were different among progeny of different sires. These differences in behaviour did not affect liveweight gain. Liveweight gain over the 6-week trial period was significantly higher for progeny from one wapiti sire than for all red deer sire progeny while being managed on the kale diet (P < 0.001), but there were no differences among progeny on the pasture diet. Conclusion Foraging behaviour varied considerably between sire lines and appeared to vary between forage type, but there were no correlations between behaviour and liveweight gain in this trial. Implications Forage type offered to young red deer may alter their foraging behaviour. Offering an easier to harvest high digestible forage diet may increase liveweight gain of progeny that have a higher genetic potential to grow during the winter period.

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Section: Discussionsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

GPS-derived foraging behaviour of red deer and liveweight gain of red deer and wapiti crossbred sire lines on contrasting winter forage types

et al. 2023

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“…Anthropogenic factors (referenced by 75 studies) are further categorised to include stocking rate, stocking density, grazing intensity, grazing system, livestock weights, mowing, soil and fire management, land use, pasture treatment (i.e., fertilizer, herbicide, nitrogen, etc.) and irrigation [2,7,49,65,66,[80][81][82][83][84][85][86][87][88][89][90]. These variables are quantified through field measurements (and/or ancillary data) and correlated against remote sensing data [50,70].…”

Section: Remotely Sensed Environmental Parameters Applied To Pasture ...mentioning

confidence: 99%

Advancing Skyborne Technologies and High-Resolution Satellites for Pasture Monitoring and Improved Management: A Review

Ogungbuyi,

Mohammed,

Ara

et al. 2023

Remote Sensing

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The timely and accurate quantification of grassland biomass is a prerequisite for sustainable grazing management. With advances in artificial intelligence, the launch of new satellites, and perceived efficiency gains in the time and cost of the quantification of remote methods, there has been growing interest in using satellite imagery and machine learning to quantify pastures at the field scale. Here, we systematically reviewed 214 journal articles published between 1991 to 2021 to determine how vegetation indices derived from satellite imagery impacted the type and quantification of pasture indicators. We reveal that previous studies have been limited by highly spatiotemporal satellite imagery and prognostic analytics. While the number of studies on pasture classification, degradation, productivity, and management has increased exponentially over the last five years, the majority of vegetation parameters have been derived from satellite imagery using simple linear regression approaches, which, as a corollary, often result in site-specific parameterization that become spurious when extrapolated to new sites or production systems. Few studies have successfully invoked machine learning as retrievals to understand the relationship between image patterns and accurately quantify the biophysical variables, although many studies have purported to do so. Satellite imagery has contributed to the ability to quantify pasture indicators but has faced the barrier of monitoring at the paddock/field scale (20 hectares or less) due to (1) low sensor (coarse pixel) resolution, (2) infrequent satellite passes, with visibility in many locations often constrained by cloud cover, and (3) the prohibitive cost of accessing fine-resolution imagery. These issues are perhaps a reflection of historical efforts, which have been directed at the continental or global scales, rather than at the field level. Indeed, we found less than 20 studies that quantified pasture biomass at pixel resolutions of less than 50 hectares. As such, the use of remote sensing technologies by agricultural practitioners has been relatively low compared with the adoption of physical agronomic interventions (such as ‘no-till’ practices). We contend that (1) considerable opportunity for advancement may lie in fusing optical and radar imagery or hybrid imagery through the combination of optical sensors, (2) there is a greater accessibility of satellite imagery for research, teaching, and education, and (3) developers who understand the value proposition of satellite imagery to end users will collectively fast track the advancement and uptake of remote sensing applications in agriculture.

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Taste agents as modulators of the feeding behaviour of grazing yaks in alpine meadows

Fan¹,

Ren²,

Ma³

et al. 2023

animal

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Farmed red deer home range, habitat use and daily movement patterns in a Southland, New Zealand, tussock grassland over calving and lactation

Cited by 5 publications

References 49 publications

GPS-derived foraging behaviour of red deer and liveweight gain of red deer and wapiti crossbred sire lines on contrasting winter forage types

GPS-derived foraging behaviour of red deer and liveweight gain of red deer and wapiti crossbred sire lines on contrasting winter forage types

Advancing Skyborne Technologies and High-Resolution Satellites for Pasture Monitoring and Improved Management: A Review

Taste agents as modulators of the feeding behaviour of grazing yaks in alpine meadows

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