Sex Biases in Avian Natal Dispersal: An Extension of the Mammalian Model

Wolff, Jerry O.; Plissner, Jonathan H.

doi:10.2307/3546844

Cited by 48 publications

(49 citation statements)

References 28 publications

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“…This is similar to many results from mammal translocations (Davis 1983;Short & Turner 2000), whereas translocated birds species seem to be variable in responses where reported (Castro et al 1994;Armstrong & Craig 1995). Discussions on male and female dispersal have generally postulated male-biased dispersal in mammals, and female-biased dispersal in birds (Greenwood 1980;Wolff & Plissner 1998;Clarke et al 1997;Dale 2001) further highlighting similarities between the semi-flightless bristlebirds and small mammals. Interestingly, the rates at which the translocated Eastern Bristlebirds were moving per hour showed no differences between males and females.…”

Section: Discussionsupporting

confidence: 68%

The effect of exposure on landscape scale soil surface temperatures and species distribution models

2007

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Species distribution models (SDMs) often use elevation as a surrogate for temperature or utilise elevation sensitive interpolations from weather stations. These methods may be unsuitable at the landscape scale, especially where there are sparse weather stations, dramatic variations in exposure or low elevational ranges. The goal of this study was to determine whether radiation, moisture or a novel estimate of exposure could improve temperature estimates and SDMs for vegetation on the Illawarra Escarpment, near Sydney, Australia. Forty temperature sensors were placed on the soil surface of an approximately 12,000 ha study site between November 2004 and August 2006. Linear regression was used to determine the relationship with environmental factors. Elevation was correlated more with moderate temperatures (winter maximums, summer minimums, spring and autumn averages) than extreme temperatures (summer maximums, winter minimums). The correlation (r 2) between temperature and environmental factors was improved by up to 0.38 by incorporating exposure, moisture and radiation in the regressions. Summer maximums and winter minimums were predominately determined by exposure to the NW and coastal influences respectively, while exposure to the NE and SW was important during other seasons. These directions correspond with the winds that are most influential in the study area. The improved temperature estimates were used in Generalised Additive Models for 37 plant species. The deviance explained by most models was increased relative to elevation, especially for moist rainforest species. It was concluded that improving the accuracy of seasonal temperature estimates could improve our ability to explain the patchy distribution of many species. SummaryTranslocating birds to a new area of habitat to restore or supplement depleted populations may pose a significant threat to the translocated individuals. While for many species, translocated individuals appear to move larger distances than resident animals, species with poor dispersal capacity may be restricted in movements and translocation methods may need to accommodate differences in movements to ensure success. In this study, designed to provide insights to inform our broader program of translocations in New South Wales, Australia, we investigated post-release movements in the endangered, semiflightless Eastern Bristlebird (Dasyornis brachypterus). We predicted that movements would be minimal, with few differences between males and females, similar to published information for a resident un-manipulated population. Following the release of 45 birds at a host location at Jervis Bay, NSW, over a three-year programme, we followed individuals for up to two weeks using radio-tracking. The translocated birds had larger maximum movements and moved through much larger home ranges than nontranslocated individuals from the resident population. Translocated birds moved 300 m further after release when conspecifics were present. Males moved further than females and tended to have l...

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Section: Discussionsupporting

confidence: 68%

The effect of exposure on landscape scale soil surface temperatures and species distribution models

2007

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“…Dispersal rates vary with both sex (e.g., Clarke et al 1997, Wolff andPlissner 1998) and age (e.g., Greenwood and Harvey 1982) in many passerines. Although our analyses suggest large age-based differences in dispersal, they provide no evidence of such differences between sexes in either juveniles or adults (see also Anderson et al 2005).…”

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Demography and dispersal of juvenile and adult Brown-headed Cowbirds (Molothrus ater) in the eastern Sierra Nevada, California, estimated using multistate models

Anderson

Fujiwara

Rothstein

2012

The Auk

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. University of California Press and AmericanOrnithologists' Union are collaborating with JSTOR to digitize, preserve and extend access to The Auk.Abstract.-Despite recent progress in avian demography, much still needs to be learned about patterns of survival and dispersal across different ages and sexes of birds. This is expressly true for Brown-headed Cowbirds (Molothrus ater) in light of their vagility and importance in the life history of many other bird species. We used multistate mark-recapture models to estimate annual survival and dispersal rates of Brownheaded Cowbirds across dialect subpopulations in the Sierra Nevada of California across the 1982-1988 breeding seasons. We estimated rates for male and female hatch-year (HY) and after-hatch-year (AHY) birds and found no evidence of differences in capture probabilities across sex and age states. To account for high apparent nonresidency, adult survival was estimated separately for the year following initial capture and for subsequent years. The latter estimates are near the midpoint of those from other studies (AHY females: 56.1%; after-second-year [ASY] males: 63.4%; second-year [SY] males: 32.9%). Survival estimates for HY birds are high for passerines (females: 24.6%; males: 25.3%), although they are largely consistent with estimates from long-term mark-recapture studies in other species. We found no evidence of sex-biased dispersal, although rates for HY birds (about 14-15%) were about 3× higher than those for adults (about 4-5%). Our study provides a more detailed understanding of the demography and dispersal of cowbirds, offering a platform for future research on the social behavior and ecology of this species and on possible strategies for its management.

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“…First, although inbreeding avoidance is thought by many to be the main underlying cause of sex-biased dispersal (Greenwood 1980, Perrin & Mazalov 2000, following Greenwood (1980) (see also Johnson & Gaines 1990, Clarke et al . 1997, Wolff & Plissner 1998, Perrin & Mazalov 2000, we assume that in common with most other monogamous birds (and other similar raptors: Newton 1979, Forero et al . 2002, Serrano et al .…”

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Natal and breeding dispersal in a reintroduced population of White‐tailed EaglesHaliaeetus albicilla

et al. 2009

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Sex Biases in Avian Natal Dispersal: An Extension of the Mammalian Model

Cited by 48 publications

References 28 publications

The effect of exposure on landscape scale soil surface temperatures and species distribution models

The effect of exposure on landscape scale soil surface temperatures and species distribution models

Demography and dispersal of juvenile and adult Brown-headed Cowbirds (Molothrus ater) in the eastern Sierra Nevada, California, estimated using multistate models

Natal and breeding dispersal in a reintroduced population of White‐tailed EaglesHaliaeetus albicilla

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