Home range and resource selection by animals constrained by linear habitat features: an example of<scp>B</scp>lakiston's fish owl

Slaght, Jonathan C.; Horne, Jon S.; Surmach, Sergei G.; Gutiérrez, R. J.

doi:10.1111/1365-2664.12143

Cited by 22 publications

(28 citation statements)

References 33 publications

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“…However, obtaining constrained home range estimates remains difficult (e.g., Slaght et al, 2013). We found that the movements of the water opossum are constrained to river channels and banks.…”

Section: Home Range Sizementioning

confidence: 78%

“…Most home range estimators overestimate home range size for animals constrained to linear habitats because they include large unused areas (Sauer, BenDavid & Bowyer, 1999;Blundell, Maier & Debevec, 2001;Slaght et al, 2013). Therefore, we modelled and estimated the home range size for the water opossum in three different ways.…”

Section: Home Range Estimatorsmentioning

confidence: 99%

“…We used the fixed kernel with reference smoothing parameter to estimate the KUD inside 95% of the volume of the home range (Blundell et al 2001). Sometimes kernel density estimators can overestimate home range sizes for animals constrained by linear habitats (Slaght et al, 2013). The third choice was the synoptic model of space use (Horne et al, 2008), the methods of which are detailed in the next section.…”

Section: Home Range Estimatorsmentioning

confidence: 99%

“…The BVN characterizes the space use of an animal that biases movements towards a central place, and the exponential model allows for a more uniform distribution of space use (Slaght et al, 2013). We compared null models of both distributions for each individual using AICc.…”

Section: Modelling Home Range and Habitat Selection Simultaneouslymentioning

confidence: 99%

“…As the BVN performed much better for all animals (i.e., differences in AICc > 3), we used only the BVN for the subsequent analysis. We used maximum likelihood (via numerical optimization) to estimate the parameters governing the null model of the home range and the selection coefficients in R (code in Slaght et al 2013).…”

Section: Modelling Home Range and Habitat Selection Simultaneouslymentioning

confidence: 99%

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Spatial ecology of the water opossum Chironectes minimus in Atlantic Forest streams

et al. 2016

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Spatial ecology of the water opossum Chironectes minimus in Atlantic Forest streams.Mammalian Biology http://dx. ABSTRACTThe water opossum Chironectes minimus is the world's only semi-aquatic marsupial. It is considered rare, and it is reported on several regional conservation lists of species as either endangered or data deficient. Given its uniqueness and the poor knowledge of its ecology, we aimed to investigate home range size and overlap and habitat selection of the water opossum in Atlantic Forest streams in southeastern Brazil.We radio tracked water opossums and collected information about their habitats and behaviour from October 2004 to April 2010. We combined common home range estimators for animals living in linear habitats with the synoptic model of home range and habitat selection. For the 10 individuals monitored, the home ranges varied between 0.80 and 9.66 km of watercourses; none of them had exclusive home ranges. The home range size for males was, on average, three times larger than for females. The overlap data showed that, on average, one male could encompass the home ranges of up to five females simultaneously, but more than one male could have access to the same female.For habitat selection at the individual level, we could not find any strong influence of habitat features on water opossum preferences because individuals selected different sets of habitat variables. However, at the population level, we found a negative relationship between home range size and river size. The water opossum seems to prefer shallow and narrow watercourses to establish its home ranges. Here, we present valuable information to advance our knowledge of the water opossum and its ecology, which is urgent for conservation purposes.

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Section: Home Range Sizementioning

confidence: 78%

Section: Home Range Estimatorsmentioning

confidence: 99%

Section: Home Range Estimatorsmentioning

confidence: 99%

Section: Modelling Home Range and Habitat Selection Simultaneouslymentioning

confidence: 99%

Section: Modelling Home Range and Habitat Selection Simultaneouslymentioning

confidence: 99%

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Spatial ecology of the water opossum Chironectes minimus in Atlantic Forest streams

et al. 2016

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Satellite telemetry reveals habitat selection decisions by black oystercatchers across seasonal, diel, and tidal cycles

Ware

Hipfner

Green

2023

Ecology and Evolution

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Habitat use of indicator species is used to prioritize management activities. However, habitat use can vary temporally in response to changes in predation risk and foraging rewards. We deployed satellite tags on 20 black oystercatchers ( Haematopus bachmani ) in four regions of British Columbia, Canada, to examine habitat use and selection decisions across seasonal, diel and tidal cycles. We characterized the shoreline in each region and used GLMMs to investigate how habitat characteristics influenced shoreline use by tracked birds. For individuals, we estimated home range size and the frequency key features of the shoreline were re‐visited. Black oystercatchers generally made greater‐than‐expected use of rocky islets and shoreline with freshwater outflows, less tree cover and greater intertidal area. However, while black oystercatchers preferred islets and shoreline with less tree cover at most/all time periods, they only exhibited preferences for greater intertidal area during low tides, and preferences for shoreline with freshwater outflows during the nonbreeding season, day, and high tides. Individual home ranges, on average, contained 46 km of shoreline (range: 12–156 km) and individuals used 10.4 km (range: 6.7–13.9 km). Individuals made greater use of larger islets with less tree cover that were closer to outflows, and greater use of outflows associated with larger streams, greater intertidal areas and gravel substrates. Black oystercatchers' habitat preferences likely reduce predation risk (rocky islets and shoreline with less tree cover) and increase foraging rewards (shoreline with freshwater outflows, greater intertidal area, and gravel substrates). However, habitat preferences appear sensitive to constraints on movement in the breeding season and changes in foraging rewards across the diel and tidal cycle, highlighting the importance of examining habitat use at multiple temporal scales. Black oystercatchers are considered indicators of rocky intertidal health; therefore, critical habitat is expected to be important for a suite of wildlife dependent on safe and productive coastline.

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Mallard brood movements and survival in an urbanized landscape

Dykstra,

Huang,

Rittenhouse

2024

J Wildl Manag

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When selecting a nest site, mallards (Anas platyrhynchos) balance differing habitat requirements for the nesting and brood‐rearing periods, such that the juxtaposition of these habitats in the landscape may influence the female's reproductive strategy and reproductive success. Mallard populations in the northeastern United States have declined since the mid‐1990s, and increasing urban development in this region may pose risks to broods and cause high duckling mortality. We assessed mallard brood and duckling survival in the urbanized landscapes of Connecticut, USA, and evaluated whether differences in brood movements, home ranges, and habitat use in urbanized areas influence brood survival. We monitored 32 mallard broods from females with global positioning system (GPS) transmitters in Connecticut in 2021 and 2022. Apparent brood survival to 30 days (0.48, n = 29 broods) was comparable to previous estimates in the Northeast (range = 0.21–0.72), but individual duckling survival (0.18, n = 257 ducklings) was lower than many previous estimates for this region (range = 0.14–0.44), suggesting this parameter warrants continued evaluation because it may be contributing to population declines in Connecticut and the greater Northeast region. Mallard females demonstrated different reproductive strategies and seemed to prioritize either high‐quality nesting habitat or proximity to high‐quality brood‐rearing habitat. High‐quality nesting habitat is not necessarily near high‐quality brood‐rearing habitat, and 61% (17/28) of females moved their ducklings an average of 1.1 ± 0.9 km (SD) shortly after hatch to a brood‐rearing site, often traveling along small streams. A similar proportion of successful (9/12) and failed (7/13) broods moved. We provide evidence of limited availability of brood‐rearing habitat, as females moved long distances to brood‐rearing wetlands and only 1 brood made additional inter‐wetland moves. Management actions that create or modify nesting and brood‐rearing habitat should consider connectivity between these sites; females may choose to nest away from wetlands to minimize exposure to predators but may depend on small streams for travel to brood‐rearing wetlands.

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Home range and resource selection by animals constrained by linear habitat features: an example ofBlakiston's fish owl

Cited by 22 publications

References 33 publications

Spatial ecology of the water opossum Chironectes minimus in Atlantic Forest streams

Spatial ecology of the water opossum Chironectes minimus in Atlantic Forest streams

Satellite telemetry reveals habitat selection decisions by black oystercatchers across seasonal, diel, and tidal cycles

Mallard brood movements and survival in an urbanized landscape

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