Apparent survival of adult Burrowing Owls that breed in Canada is influenced by weather during migration and on their wintering grounds

Wellicome, Troy I.; Fisher, Ryan J.; Poulin, Ray G.; Todd, L. Danielle; Bayne, Erin M.; Flockhart, D. T. Tyler; Schmutz, Josef K.; Smet, K. De; James, Preston E.

doi:10.1650/condor-13-161.1

Cited by 15 publications

(11 citation statements)

References 51 publications

(57 reference statements)

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“…Only four of these differences were statistically significant (as determined using the program contrast ; Hines & Sauer ): those in studies of Southern Crested Caracara Caracara plancus ( χ 2 = 69.230, female 3 percentage points higher than male, P < 0.0001; Morrison ) and Hen Harrier ( χ 2 = 5.586, female 18 percentage points higher than male, P = 0.018; Picozzi ), and in two of three studies of Burrowing Owl ( χ 2 = 4.5, male 12 percentage points higher than female, P = 0.034; Millsap , χ 2 = 15.56, male 23 percentage points higher than female, P = 0.0001; Wellicome et al . ).…”

Section: Resultsmentioning

confidence: 97%

A review of survival estimates for raptors and owls

Newton

McGrady²,

Oli

2016

Ibis

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This paper reviews the literature on survival estimates for different species of raptors and owls, examines the methods used to obtain the estimates, and draws out some general patterns arising. Estimating survival usually involves the marking of birds so that they can be recognized as individuals on subsequent encounters. Annual survival can then be estimated from: (1) birds ringed at known age (usually as nestlings) and subsequently reported by members of the public (usually as found dead), the ratio of recoveries at different ages being used to calculate annual survival; (2) marked breeding adults, trapped or re-sighted in subsequent years in particular study areas, with the proportion retrapped (or re-sighted) in each year being taken as the minimum annual survival; (3) live encounter (trapped or re-sighted) of birds marked either as nestlings or breeding adults analysed using the capture-mark-recapture (or re-sighting) methods to estimate annual survival; (4) a combination of reports of known-age dead birds and re-trapping/re-sighting of live birds; (5) use of radio-or satellite-tracking to follow the fates of individuals; and (6) the integration of these methods with other information, such as change in numbers between years, to derive estimates of survival and other demographic parameters. Studies confined to particular areas usually give estimates of 'apparent annual survival', because they take no account of birds that leave the area. However, radio-or satellitetracking makes it possible to estimate true survival, including survival of prebreeders that have low natal-site fidelity (this usually requires satellite telemetry). As in other birds, the preferred method for estimating survival has changed over time, as new and more robust methods of estimation have been developed. Methods 1 and 2 were the first to be developed, but without statistical underpinning, while methods 3-6 were developed later on the basis of formal statistical models. This difference has to be borne in mind in comparing older with newer estimates for particular species. Published survival estimates were found for three species of Cathartidae, one of Pandionidae, 29 of Accipitridae, 12 of Falconidae, one of Tytonidae and nine of Strigidae, almost all from temperate Northern Hemisphere species. In most of these species more than one estimate was available, and in some separate estimates for different age or sex groups. The main patterns to emerge included: (1) a significant tendency for annual adult survival to increase with body weight, smaller species having annual survival rates mainly of 60-70%, mediumsized species having rates mainly in the range 70-90% and the largest having rates of > 90%, in the absence of obvious human-caused losses; (2) a lower survival in the first or prebreeding years of life than in subsequent years; (3) a lack of obvious or consistent differences in survival between the sexes, where these could be distinguished; and (4) in

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Section: Resultsmentioning

confidence: 97%

A review of survival estimates for raptors and owls

Newton

McGrady²,

Oli

2016

Ibis

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“…Survival rates have been found to be lower in the nonbreeding season in migratory red knots Calidris canutus canutus (Leyrer et al 2013 (Duriez et al 2012). Low survival due to carry-over effects from conditions at winter sites have also been found in the migratory burrowing owl Athene cunicularia (Wellicome et al 2014). This study did not examine the influence of competition or weather on survival during the nonbreeding period.…”

Section: Discussionmentioning

confidence: 91%

Survival of adult reddish egrets Egretta rufescens marked with satellite transmitters

Koczur¹,

Ballard²,

Green³

2017

Endang. Species. Res.

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The reddish egret Egretta rufescens is the rarest heron in North America, and there are many information gaps in our understanding of its ecology. The population size of the reddish egret is relatively small, and although its range spans from the Gulf Coast of the United States to the northern coast of South America, it is restricted to shallow, coastal lagoon systems. Nest survival and juvenile survival have been examined in the reddish egret; however, adult survival has not. We marked 30 adult reddish egrets with satellite transmitters and used the known-fate model in Program MARK to estimate monthly survival. Monthly survival estimates were high and best explained by season, with a 0.992 (95% CI: 0.974−0.997) survival rate during the breeding season and 0.949 (95% CI: 0.912−0.971) during the nonbreeding season. This is the first study to estimate adult survival of reddish egrets, and it provides new information on the ecology of the species.

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“…Møller et al , Lehikoinen et al ). However, accumulating evidence suggests changes in precipitation regimes can also have negative implications for a variety of avian species (McDonald et al , Glenn et al , Pokrovsky et al , Hansen et al , Wellicome et al , Öberg et al ). For raptors in particular, heavy rainfall may be the dominant factor contributing to variation in survival and fitness (McDonald et al , Franke et al , Anctil et al , Fisher et al ).…”

Section: Discussionmentioning

confidence: 99%

“…Studies investigating the influence of climate change on ecosystems have generally focused on changes in temperature as the mechanism driving changes in trophic interactions (Visser et al 2004, Both et al 2006, Møller et al 2008, Lehikoinen et al 2013). However, accumulating evidence suggests changes in precipitation regimes can also have negative implications for a variety of avian species (McDonald et al 2004, Glenn et al 2011, Pokrovsky et al 2012, Hansen et al 2013, Wellicome et al 2014, Öberg et al 2015. For raptors in particular, heavy rainfall may be the dominant factor contributing to variation in survival and fitness (McDonald et al 2004, Franke et al 2011, Anctil et al 2014, Fisher et al 2015.…”

Section: Discussionmentioning

confidence: 99%

Weather‐mediated decline in prey delivery rates causes food‐limitation in a top avian predator

Robinson

Franke²,

Derocher

2017

Journal of Avian Biology

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Inclement weather can negatively affect breeding birds directly by exposure to factors such as severe temperature and rainfall, or indirectly by reducing food supply. During a three‐year study of Arctic peregrine falcons Falco peregrinus tundrius breeding in Nunavut, Canada, we estimated annual prey density at a biologically relevant scale (i.e. the home range of breeding pairs), and examined the manner in which prey density and within‐season weather conditions influenced occupancy of breeding sites, egg‐laying, hatch rate, prey delivery rates and growth and survivability of nestlings. The first two summers of our study (2010–2011) were warm and dry, while the third summer (2012) was cool and wet, and was preceded by a severe spring rain event. We found that occupancy of breeding sites was consistently high. As a proportion of the number of eggs laid, hatch rate did not change among years, but the number of eggs laid per occupied site declined in the third year of the study. In the first two years of the study, the number of nestlings per occupied sited was high, but declined in the third year. Total prey density at the home range scale was similar in 2010 and 2012, while the highest prey density was recorded in 2011. Total prey delivery rates to nestlings and nestling growth rates were significantly lower in 2012, which received more precipitation than 2010 and 2011. Nestling growth rates were similar in 2010 and 2011, but were markedly different in 2012; for both sexes the period of rapid growth was of shorter duration in 2012 and asymptotic weights were lower. This research contributes to the growing body of evidence that indicates severe rain events and ongoing periods of wet weather can reduce reproductive output of Arctic‐breeding raptors regardless of whether it occurs during laying, incubation or brood rearing.

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Apparent survival of adult Burrowing Owls that breed in Canada is influenced by weather during migration and on their wintering grounds

Cited by 15 publications

References 51 publications

A review of survival estimates for raptors and owls

A review of survival estimates for raptors and owls

Survival of adult reddish egrets Egretta rufescens marked with satellite transmitters

Weather‐mediated decline in prey delivery rates causes food‐limitation in a top avian predator

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