Central-place foraging poses variable constraints year-round in a neotropical migrant

Lalla, Kristen; Fraser, Kevin C.; Frei, Barbara; Fischer, Jason D.; Siegrist, Joe; Ray, James D.; Cohn‐Haft, Mario; Elliott, Kyle H.

doi:10.1186/s40462-022-00337-2

Cited by 3 publications

(2 citation statements)

References 55 publications

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“…Foraging bouts from centralized locations are known to incur a cost of time, energy, and mortality risk [ 87 ]. During incubation, avian species are constrained to nest sites, and their ability to use space is restricted if low-risk loafing and foraging areas are not adequately distributed within their range [ 39 , 43 , 80 ]. Therefore, individuals should familiarize themselves with profitable areas within their incubation ranges that provide reduced risk or energetic benefit [ 52 ].…”

Section: Introductionmentioning

confidence: 99%

Prospecting during egg laying informs incubation recess movements of eastern wild turkeys

Bakner,

Ulrey,

Collier

et al. 2024

Mov Ecol

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Background Central place foragers must acquire resources and return to a central location after foraging bouts. During the egg laying (hereafter laying) period, females are constrained to a nest location, thus they must familiarize themselves with resources available within their incubation ranges after nest site selection. Use of prospecting behaviors by individuals to obtain knowledge and identify profitable (e.g., resource rich) locations on the landscape can impact demographic outcomes. As such, prospecting has been used to evaluate nest site quality both before and during the reproductive period for a variety of species. Methods Using GPS data collected from female eastern wild turkeys (Meleagris gallopavo silvestris) across the southeastern United States, we evaluated if prospecting behaviors were occurring during laying and what landcover factors influenced prospecting. Specifically, we quantified areas prospected during the laying period using a cluster analysis and the return frequency (e.g., recess movements) to clustered laying patches (150-m diameter buffer around a clustered laying period location) during the incubation period. Results The average proportion of recess movements to prospected locations was 56.9%. Nest fate was positively influenced (μ of posterior distribution with 95% credible 0.19, 0.06–0.37, probability of direction = 99.8%) by the number of patches (90-m diameter buffer around a clustered laying period location) a female visited during incubation recesses. Females selected for areas closer to the nest site, secondary roads, hardwood forest, mixed pine-hardwood forest, water, and shrub/scrub, whereas they avoided pine forest and open-treeless areas. Conclusions Our findings suggest that having a diverse suite of clustered laying patches to support incubation recesses is impactful to nest fate. As such, local conditions within prospected locations during incubation may be key to successful reproductive output by wild turkeys. We suggest that prospecting could be important to other phenological periods. Furthermore, future research should evaluate how prospecting for brood-rearing locations may occur before or during the incubation period.

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Section: Introductionmentioning

confidence: 99%

Prospecting during egg laying informs incubation recess movements of eastern wild turkeys

Bakner,

Ulrey,

Collier

et al. 2024

Mov Ecol

View full text Add to dashboard Cite

show abstract

“…Foraging bouts from centralized locations are known to incur a cost of time, energy, and mortality risk (Ydenberg et al 1994). Similarly, avian species are constrained to nest sites during incubation, and may have space use restrictions if loa ng and foraging areas are not adequately distributed across their range (Kacelnik 1984, van Gils and Tijsen 2007, Lalla et al 2022). Therefore, individuals should familiarize themselves with pro table foraging patches across their incubation ranges that provide energetic bene t (Olsson et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Prospecting during egg laying informs incubation recess movements of eastern wild turkeys

Bakner¹,

Ulrey²,

Collier

et al. 2023

Preprint

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Background Central place foragers must acquire resources and return to the central location after foraging bouts. During the egg laying (hereafter laying) period, females become constrained to a nesting location, and it is postulated that females familiarize themselves with resources available within their incubation ranges. Prospecting behavior allows individuals to obtain knowledge to determine profitable (e.g., resource rich) locations on the landscape.Methods Using GPS data collected from female eastern wild turkeys (Meleagris gallopavo silvestris) across the southeastern United States, we determined if prospecting behaviors were occurring during laying and what environmental factors influenced prospecting. We quantified prospecting using movements of females during incubation recesses to locations visited during laying.Results The average proportion of recess movements to previously visited locations was 56.9%. Nest fate was positively influenced by the number of patches (90-m radius buffer around a laying location) a female visited during incubation recesses. Females selected for areas closer to the nest site, secondary roads, hardwood forest, mixed pine-hardwood forest, water, and shrub/scrub, whereas they avoided pine forest and open-treeless areas.Conclusions Our findings suggest that having a diverse suite of patches available to support incubation recesses within an incubation range are impactful to nest fate. This research suggest prospecting could be important to other phenological periods during reproduction. Furthermore, research should evaluate how prospecting for brood-rearing habitat may occur prior to or during the incubation period.

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Diet is associated with age and habitat, not foraging range, in purple martins: implications for aerial insectivores as indicators

Dunoyer,

Lalla,

Fraser

et al. 2024

Can. J. Zool.

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Many aerial insects are declining yet monitoring wildlife in airspace is challenging. Aerial insectivores, which are themselves a declining guild, may be useful indicators for aerial insects. However, their use as indicators may be complicated if they differentially sample prey depending on foraging range, as predicted by central place foraging theory. We measured diet composition of purple martins (Progne subis Linnaeus, 1758) in Quebec by DNA metabarcoding fecal samples collected from adults and nestlings and used GPS biologgers to measure foraging behaviour of the chick-rearing adults. Foraging range did not predict diet or diet diversity. The proportion of individuals with Diptera and Coleoptera detected in their diets was lower in developed and water habitats. Martins fed their nestlings soft-bodied insects (Diptera and Trichoptera) more often than they ate them themselves. As nestlings aged, they were fed more chitinous arthropods and less soft-bodied prey. As the proportion of different prey orders depended on habitat use and age, but not foraging distance, we argue that purple martin diet is a potential indicator of aerial insect community variation across space, but that interpretations may be complex as birds may sample different components of the aerial insect community during different life stages.

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Central-place foraging poses variable constraints year-round in a neotropical migrant

Cited by 3 publications

References 55 publications

Prospecting during egg laying informs incubation recess movements of eastern wild turkeys

Prospecting during egg laying informs incubation recess movements of eastern wild turkeys

Prospecting during egg laying informs incubation recess movements of eastern wild turkeys

Diet is associated with age and habitat, not foraging range, in purple martins: implications for aerial insectivores as indicators

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