Differential spatial use and spatial fidelity by breeders in Bonelli’s Eagle (Aquila fasciata)

Martínez-Miranzo, Beatriz; Banda, Eva; Gardiazábal, Andrea; Ferreiro, Ernesto; Aguirre, José I.

doi:10.1007/s10336-016-1347-1

Cited by 20 publications

(16 citation statements)

References 32 publications

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“…html). Home ranges of 50% kernel-density represent nesting and coreareas, 75% the actively selected areas for hunting or roosting (Martinez-Miranzo et al 2016) and 90% is an estimate of total home range (Trierweiler 2010;Guixé and Arroyo 2011). Home ranges were not calculated for flight segments (linear movement between distant sites).…”

Section: Home Range Size and Statistical Analysismentioning

confidence: 99%

Changing places: spatial ecology and social interactions of female and male Montagu’s Harrier (Circus pygargus) in the Spanish Extremadura

et al. 2021

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The ground nesting raptor Montagu’s Harrier breeds in loose colonies in cereal fields in the Spanish Extremadura. It is unclear how and whether birds in different colonies interact and how harriers spend time before and after nesting, before starting migration. We used GPS–GSM tags deployed on ten females and three males, some over multiple seasons, to follow bird movements with unprecedented detail. Arriving from spring migration, all males and most females returned to their old nest site, and spent between 13 and 25 days in mate choice and local site inspection. During incubation and early nesting female movements were strongly reduced, but increased significantly during late nesting and post-fledging periods. After fledging or after breeding failure, females increased their flying radius. Some of them visited other colonies, for single days or for longer periods, or flew long distances within Spain. These visits might have included help in breeding attempts of other pairs (adoptions). Four out of six females returned to their own breeding site before starting migration. Several females repeatedly used common roosts in this phase. Non-breeding females were active in defending nests in the colony against predators. Females with successful brood initiated migration earlier and spent less time in Spain than non-breeders or those with predated nests. Unlike females, daily distances in males were more uniform. While all males remained in the breeding area for the entire season, their activity centres shifted more within that area than those of females.

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Section: Home Range Size and Statistical Analysismentioning

confidence: 99%

Changing places: spatial ecology and social interactions of female and male Montagu’s Harrier (Circus pygargus) in the Spanish Extremadura

et al. 2021

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“…Therefore, males could adapt their copulation frequencies to both their own movements and those of their mates [40, 44]. In our study, Bonelli´s Eagles spent 66% of each day ranging over their foraging areas; although information on foraging movements as a pair during the pre-laying period are currently scarce [24, 52, 53, 54]. However, recent high-resolution satellite telemetry monitoring revealed that both sexes spend a large part of each day ranging together over their foraging areas during the period preceding egg-laying (Perona & López-López pers.…”

Section: Discussionmentioning

confidence: 99%

Copulatory behaviour in the Bonelli´s Eagle: Assessing the paternity assurance hypothesis

Martínez

Zuberogoitia²,

Escarabajal³

et al. 2019

PLoS ONE

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We examined copulatory behaviour in the Bonelli´s Eagle ( Aquila fasciata ) at nesting sites in the eastern zone of the Baetic Cordillera, southern Spain, between 2010 and 2012. We observed the copulatory behaviour of 15 pairs during the pre-laying period. Bonelli´s Eagles commenced sexual activity ca. 69 days before egg-laying. Ninety-six percent of mounting attempts were successful. Bonelli´s Eagle pairs averaged 99.8 copulation attempts per clutch, with an average copulation frequency of 0.86 copulation attempts per day. Pairs displayed a daily bimodal pattern of copulation activity, with copulations occurring most frequently in the evening. We used our data to test three predictions with regard to the paternity assurance hypothesis. Prediction 1, that within-pair copulations increase with local breeding density, was rejected because our models showed no evidence for it. Prediction 2, that within-pair copulations increase during the female fertile period, was marginally supported. Finally, Prediction 3, that mate attendance increases during the female fertile period, was also rejected because mate-guarding did not increase as the fertile period approached. However, mate-guarding was positively correlated with within-pair copulation frequency. Moderate copulation rates compared to other raptors and the absence of mate-guarding suggest that, in the study area, Bonelli´s Eagles exhibit only partially adaptive behaviour to assure their paternity. A possible explanation could be related to the low number of extra-pair encounters observed (opportunities for which appear to be rare), although the gradual increase in within-pair copulations during the female fertile period is consistent with the sperm competition hypothesis. The results are discussed based on the signalling hypothesis, which proposes that raptors signal territory ownership to conspecifics, and possibly to other raptor species, by copulating frequently and conspicuously in the defended nesting area.

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“…By comparing the level of overlap or similarity of UDs at different time-points it is possible to determine how the level of consistency of space-use, or site fidelity, of an animal may change over time [19–21]. Assuming two different discrete UDs that have both been rescaled as probability distributions, the Bhatacharyya coefficient (or Bhattacharyya's affinity) is a simple way to compare the level of similarity or overlap of the UDs [59,64,65]: where q represents each discrete cell in the spatial grid and is the probability mass for that cell at time t i .…”

Section: Methodsmentioning

confidence: 99%

“…In a limited home range, an animal may repeatedly visit certain locations [18] or actively spend more time in specific areas leading to different levels of space-use intensity. For an individual animal, the level of similarity in its space use at different time points can be calculated and the level of site fidelity quantified [19–22]. In the specific context of pasture-based cattle, [23] showed how spatial overlap between domesticated cattle and wild buffalo was linked to the gradient of available resources, [24] demonstrated how concentrate supplement can modify the feeding behaviour of grazing cows in high mountain pastures, while [25] considered how spatial interactions between cattle and wild boar could potentially facilitate cross-species disease transmission.…”

Section: Introductionmentioning

confidence: 99%

Space-use patterns highlight behavioural differences linked to lameness, parity, and days in milk in barn-housed dairy cows

et al. 2018

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Lameness is a key health and welfare issue affecting commercial herds of dairy cattle, with potentially significant economic impacts due to the expense of treatment and lost milk production. Existing lameness detection methods can be time-intensive, and under-detection remains a significant problem leading to delayed or missed treatment. Hence, there is a need for automated monitoring systems that can quickly and accurately detect lameness in individual cows within commercial dairy herds. Recent advances in sensor tracking technology have made it possible to observe the movement, behaviour and space-use of a range of animal species over extended time-scales. However, little is known about how observed movement behaviour and space-use patterns in individual dairy cattle relate to lameness, or to other possible confounding factors such as parity or number of days in milk. In this cross-sectional study, ten lame and ten non-lame barn-housed dairy cows were classified through mobility scoring and subsequently tracked using a wireless local positioning system. Nearly 900,000 spatial locations were recorded in total, allowing a range of movement and space-use measures to be determined for each individual cow. Using linear models, we highlight where lameness, parity, and the number of days in milk have a significant effect on the observed space-use patterns. Non-lame cows spent more time, and had higher site fidelity (on a day-to-day basis they were more likely to revisit areas they had visited previously), in the feeding area. Non-lame cows also had a larger full range size within the barn. In contrast, lame cows spent more time, and had a higher site-fidelity, in the cubicle (resting) areas of the barn than non-lame cows. Higher parity cows were found to spend more time in the right-hand-side area of the barn, closer to the passageway to the milking parlour. The number of days in milk was found to positively affect the core range size, but with a negative interaction effect with lameness. Using a simple predictive model, we demonstrate how it is possible to accurately determine the lameness status of all individual cows within the study using only two observed space-use measures, the proportion of time spent in the feeding area and the full range size. Our findings suggest that differences in individual movement and space-use behaviour could be used as indicators of health status for automated monitoring within a Precision Livestock Farming approach, potentially leading to faster diagnosis and treatment, and improved animal welfare for dairy cattle and other managed animal species.

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Differential spatial use and spatial fidelity by breeders in Bonelli’s Eagle (Aquila fasciata)

Cited by 20 publications

References 32 publications

Changing places: spatial ecology and social interactions of female and male Montagu’s Harrier (Circus pygargus) in the Spanish Extremadura

Changing places: spatial ecology and social interactions of female and male Montagu’s Harrier (Circus pygargus) in the Spanish Extremadura

Copulatory behaviour in the Bonelli´s Eagle: Assessing the paternity assurance hypothesis

Space-use patterns highlight behavioural differences linked to lameness, parity, and days in milk in barn-housed dairy cows

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