The Influence of Habitat, Prey Abundance, Sex, and Breeding Success on the Ranging Behavior of Prairie Falcons

Marzluff, John M.; Kimsey, Bryan A.; Schueck, Linda S.; McFadzen, Mary E.; Vekasy, Mark S.; Bednarz, James C.

doi:10.2307/1370470

Cited by 51 publications

(33 citation statements)

References 16 publications

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“…Marzluff et al (1997b) found that during the breeding season of Prairie Falcons Falco mexicanus, range size increased when their main prey declined. They also recorded that successful pairs ranged over smaller areas than nonnesters and unsuccessful pairs.…”

Section: Discussionmentioning

confidence: 97%

Ranging distance of resident Golden EaglesAquila chrysaetosin western Scotland according to season and breeding status

Haworth¹,

McGrady²,

Whitfield³

et al. 2006

Bird Study

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Section: Discussionmentioning

confidence: 97%

Ranging distance of resident Golden EaglesAquila chrysaetosin western Scotland according to season and breeding status

Haworth¹,

McGrady²,

Whitfield³

et al. 2006

Bird Study

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“…We suggest that diVerences in the foraging landscapes between our study areas led to the observed diVerences in movement patterns. Larger home ranges and higher movement probabilities, like those observed in Malaspina Inlet, are often associated with lower quality resources, higher rates of prey depletion, or an increased degree of prey variability (Tufto et al 1996;MarzluV et al 1997;Ferguson et al 1999). In this case, mussels were more susceptible to depletion, a prey attribute that has important ecological implications for foraging predators (Charnov et al 1976).…”

Section: Discussionmentioning

confidence: 99%

“…Numerous empirical studies have described the movement responses of animals to temporal changes in prey distribution, abundance, or quality (Van Eerden 1984;Einarsson 1988;Tufto et al 1996;Warnock and Takekawa 1996;MarzluV et al 1997;Ferguson et al 1999). However, few studies have had the data to evaluate the movement behavior of a single species in dissimilar foraging landscapes using multiple data sources.…”

Section: Introductionmentioning

confidence: 99%

Movements of wintering surf scoters: predator responses to different prey landscapes

et al. 2008

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The distribution of predators is widely recognized to be intimately linked to the distribution of their prey. Foraging theory suggests that predators will modify their behaviors, including movements, to optimize net energy intake when faced with variation in prey attributes or abundance. While many studies have documented changes in movement patterns of animals in response to temporal changes in food, very few have contrasted movements of a single predator species naturally occurring in dramatically different prey landscapes. We documented variation in the winter movements, foraging range size, site fidelity, and distribution patterns of a molluscivorous sea duck, the surf scoter (Melanitta perspicillata), in two areas of coastal British Columbia with very different shellfish prey features. Baynes Sound has extensive tidal flats with abundant clams, which are high-quality and temporally stable prey for scoters. Malaspina Inlet is a rocky fjord-like inlet where scoters consume mussels that are superabundant and easily accessible in some patches but are heavily depleted over the course of winter. We used radio telemetry to track surf scoter movements in both areas and found that in the clam habitats of Baynes Sound, surf scoters exhibited limited movement, small winter ranges, strong foraging site fidelity, and very consistent distribution patterns. By contrast, in mussel habitats in the Malaspina Inlet, surf scoters displayed more movement, larger ranges, little fidelity to specific foraging sites, and more variable distribution patterns. We conclude that features associated with the different prey types, particularly the higher depletion rates of mussels, strongly influenced seasonal space use patterns. These findings are consistent with foraging theory and confirm that predator behavior, specifically movements, is environmentally mediated.

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“…Lövy (2007) (mean 95% MCP = 342.1 ha, 9 tracked individuals) recorded a bigger average home range size in the breeding season. Marzluff et al (1997) stated that the size of home ranges decreases with the increasing accessibility to food. Henrioux (2000) explains the increase of home ranges by the uneven distribution of the main prey -common vole -that leads owls to hunt in the new areas, but Aschwanden et al (2005) showed that the vegetation structure is more important for selection of hunting ground than is prey abundance.…”

Section: Discussionmentioning

confidence: 99%

Land units composition of home ranges and changing of winter roosts of long-eared owl <italic>Asio otus</italic>

Tulis

Jakab

Slobodník

et al. 2015

Ekológia (Bratislava)

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Tulis F., Jakab I., Slobodník R., Hudec M.: Land units composition of home ranges and changing of winter roosts of long-eared owl Asio otus. Ekológia (Bratislava), Vol. 34 , No. 2, p. 147-154, 2015.During the years 2010-2012, we observed the spatial activity of long-eared owls by the radio telemetry in an agricultural land. The average home range size of tracked long-eared owls for 100 and 95% minimum convex polygon (MCP) was 415.93 and 350 ha, respectively. Between the breeding and the non-breeding season, we did not record significant differences in the size of home ranges. Open land units (meadows and arable lands) belonged to the most abundant land units in the home ranges of tracked owls (mean for 100 and 95% MCP was 24.6 and 24.3%, respectively). Forest edges with their ecotone character also represented the abundant land unit (mean for 100 and 95% MCP was 11.4 and 10.6%, respectively). An amount of built-inhabited areas in home ranges (mean for 100 and 95% MCP was 8.2 and 10.1%, respectively) correlated positively with their size (Spearman rank correlation: for 100% MCP: r s = 0.83, p <0.05; for 95% MCP: r s = 0.91, p <0.05) that indicates long-eared owls to be avoiding built-inhabited areas as an area of the food getting. Two individuals of long-eared owl changed the winter roosts during one non-breeding season, which were at a distance of 650 m from each other.

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The Influence of Habitat, Prey Abundance, Sex, and Breeding Success on the Ranging Behavior of Prairie Falcons

Cited by 51 publications

References 16 publications

Ranging distance of resident Golden EaglesAquila chrysaetosin western Scotland according to season and breeding status

Ranging distance of resident Golden EaglesAquila chrysaetosin western Scotland according to season and breeding status

Movements of wintering surf scoters: predator responses to different prey landscapes

Land units composition of home ranges and changing of winter roosts of long-eared owl <italic>Asio otus</italic>

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