Mechanisms and reproductive consequences of breeding dispersal in a specialist predator under temporally varying food conditions

Terraube, Julien; Vasko, Ville; Korpimäki, Erkki

doi:10.1111/oik.01974

Cited by 40 publications

(38 citation statements)

References 59 publications

(82 reference statements)

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“…(). Chick's sex was included in the analyses together with an interaction term between sex and breeding time due to previous findings showing sex‐specific dispersal distances (Terraube, Vasko & Korpimäki ) and sex‐specific recruitment (Laaksonen, Lyytinen & Korpimäki ).…”

Section: Methodsmentioning

confidence: 99%

Family morph matters: factors determining survival and recruitment in a long‐lived polymorphic raptor

Sumasgutner

Tate

Koeslag

et al. 2016

Journal of Animal Ecology

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From an evolutionary perspective, recruitment into the breeding population represents one of the most important life-history stages and ultimately determines the effective population size. In order to contribute to the next generation, offspring must survive to sexual maturity, secure a territory and find a mate. In this study, we explore factors influencing both offspring survival and their subsequent recruitment into the local breeding population in a long-lived urban raptor, the black sparrowhawk (Accipiter melanoleucus). Adult black sparrowhawks show discrete colour polymorphism (dark and light morphs), and in South Africa, morphs are distributed clinally with the highest proportion of dark morphs (c.75%) present in our study population on the Cape Peninsula. Parental morph was associated with both survival and recruitment. For survival, parental morph combination was important - with young produced by pairs of contrasting morphs having higher survival rates than young fledged from like-pairs. The association between recruitment and morph was more complex; with an interaction between male morph and breeding time, whereby recruitment of offspring from dark morph fathers was more likely when fledging earlier in the season. The opposite relationship was found for light morph fathers, with their offspring more likely to be recruited if fledged later in the season. This interaction may be due to differential morph-specific hunting success of fathers (males contribute most food provisioning), linked to background matching and crypsis in different weather conditions. Dark morph males may hunt more successfully in rainier and cloudier conditions, which occur more frequently earlier in the breeding season, and light morph males may be more successful later on, when weather conditions become increasingly brighter and drier. Our results reveal a complex situation whereby the family morph combination influences survival, and the father morphs specifically recruitment, revealing morph-specific benefits dependent on the timing of breeding. These empirical data are among the first to support the idea that differential fitness consequence of morph combination may explain balanced polymorphism in a vertebrate population.

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Section: Methodsmentioning

confidence: 99%

Family morph matters: factors determining survival and recruitment in a long‐lived polymorphic raptor

Sumasgutner

Tate

Koeslag

et al. 2016

Journal of Animal Ecology

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“…Breeding dispersal has mostly been documented in birds (e.g. Greenwood and Harvey 1982;Terraube et al 2015), and although it occurs in mammals (e.g. Berteaux and Boutin 2000;Jerina et al 2014), it has rarely been documented in larger long-lived mammals (Jerina et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Individuals' fidelity to an area reflects the stability of the spatial organisation of animals (Switzer 1993;Adams 2001), and interannual variation in space use patterns can influence both population structure and dynamics (Terraube et al 2015;Uboni et al 2015). Home range fidelity is generally associated to dispersion, predictability and depletion rate of resources, as well as reproductive success, age and competition (Moorhouse andMacdonald 2005, Kirk et al 2008;Edwards et al 2009;Terraube et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Home range fidelity is generally associated to dispersion, predictability and depletion rate of resources, as well as reproductive success, age and competition (Moorhouse andMacdonald 2005, Kirk et al 2008;Edwards et al 2009;Terraube et al 2015). In solitary territorial species, space use is primarily driven by resource competition over access to food or the opposite sex (Sandell 1989;).…”

Section: Introductionmentioning

confidence: 99%

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Female breeding dispersal in wolverines, a solitary carnivore with high territorial fidelity

Aronsson

Persson

2018

Eur J Wildl Res

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Individuals' fidelity to an area provides insight into the stability of the spatial and temporal organisation of animals. Territorial fidelity is often influenced by reproductive success, age, the dispersion and predictability of resources, and intraspecific competition. We examined between-year territorial fidelity in wolverines (Gulo gulo), using location data from 47 individuals collected during 1993-2013 in northern Sweden, to assess the stability of the spatial organisation of this solitary carnivore. For females, we also determined residency status from 1 year to the next. The study population is characterized by a stable distribution of resident individuals, with both males and females showing higher fidelity at the total territory level compared to more intensively used core areas. In 86% of the yearly residency status estimates (n = 122), the female remained stationary. In the remaining 14% of the cases, females either vacated their territory (8% of residency statuses), or expanded into a neighbouring territory (6% of residency statuses). We documented six cases of breeding dispersal, representing one of the few known cases of breeding dispersal in longlived large mammals. We suggest that this high territorial fidelity is enabled by wolverines' caching and scavenging behaviours, which buffer the unpredictable and large spatiotemporal variation in resource abundance in this low-productivity area. Breeding dispersal may occur due to competition for high-quality territories in this saturated population, where females are forced to abandon their territory by competitors or bequeath territories to offspring. This study further highlights the complexity of the social and spatial dynamics for solitary carnivores.

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“…Additionally, we expect breeding dispersal distance to increase (Table 1, 2B, 2C and 2F) and mate fidelity to decrease where habitats of varying quality exist near one-another because birds with poor quality territories will move to attain high quality territories (Table 1, 2D and 2E) [34, 45, 46]. Finally, the third question motivates a test of the hypothesis that following failure, increased number or quality of young are produced by individuals that disperse farthest or abandon mates to pursue better options, however this presumed benefit is inconsistently realized (Table 1, 3A–3F) [38, 47]. We expect the decisions of all species to be mediated by the costs and benefits of fidelity, as hypothesized above, however where subdivisions are being built the adaptive decisions of sensitive species may be constrained by the rapid loss of their preferred habitats.…”

Section: Introductionmentioning

confidence: 99%

Breeding Dispersal by Birds in a Dynamic Urban Ecosystem

et al. 2016

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Changes in land cover during urbanization profoundly affect the diversity of bird communities, but the demographic mechanisms affecting diversity are poorly known. We advance such understanding by documenting how urbanization influences breeding dispersal—the annual movement of territorial adults—of six songbird species in the Seattle, WA, USA metropolitan area. We color-banded adults and mapped the centers of their annual breeding activities from 2000–2010 to obtain 504 consecutive movements by 337 adults. By comparing movements, annual reproduction, and mate fidelity among 10 developed, 5 reserved, and 11 changing (areas cleared and developed during our study) landscapes, we determined that adaptive breeding dispersal of sensitive forest species (Swainson’s Thrush and Pacific wren), which involves shifting territory and mate after reproductive failure, was constrained by development. In changing lands, sensitive forest specialists dispersed from active development to nearby forested areas, but in so doing suffered low annual reproduction. Species tolerant of suburban lands (song sparrow, spotted towhee, dark-eyed junco, and Bewick’s wren) dispersed adaptively in changing landscapes. Site fidelity ranged from 0% (Pacific wren in changing landscape) to 83% (Bewick’s wren in forest reserve). Mate fidelity ranged from 25% (dark-eyed junco) to 100% (Bewick’s wren). Variation in fidelity to mate and territory was consistent with theories positing an influence of territory quality, asynchronous return from migration, prior productivity, and reproductive benefits of retaining a familiar territory. Costly breeding dispersal, as well as reduced reproductive success and lowered survival cause some birds to decline in the face of urbanization. In contrast, the ability of species that utilize edges and early successional habitats to breed successfully, disperse to improve reproductive success after failure, and survive throughout the urban ecosystem enables them to maintain or increase population size.

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Mechanisms and reproductive consequences of breeding dispersal in a specialist predator under temporally varying food conditions

Cited by 40 publications

References 59 publications

Family morph matters: factors determining survival and recruitment in a long‐lived polymorphic raptor

Family morph matters: factors determining survival and recruitment in a long‐lived polymorphic raptor

Female breeding dispersal in wolverines, a solitary carnivore with high territorial fidelity

Breeding Dispersal by Birds in a Dynamic Urban Ecosystem

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