House Wren (Troglodytes aedon)

Johnson, L. Scott

doi:10.2173/bna.380

Cited by 66 publications

(79 citation statements)

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“…Populations of house wrens in the north temperate zone are highly migratory, while populations in the tropics and subtropical zones of the Southern Hemisphere are sedentary [16,19,24]. However, the migratory status of house wren populations at more extreme southern latitudes (408 S-548 S) is unclear [16,37]. There are some reports that birds in the extreme south may be resident year around [38,39].…”

Section: Discussionmentioning

confidence: 99%

“…For example, populations in the north temperate zone, which are well studied in the United States, are migratory, show appreciable rates of polygyny and produce large clutches [14][15][16]. By contrast, populations in the tropics and the south temperate zone tend to be sedentary, socially monogamous and produce small clutches [17][18][19][20][21].…”

Section: Materials and Methods (A) Study Speciesmentioning

confidence: 99%

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Transcontinental latitudinal variation in song performance and complexity in house wrens (Troglodytes aedon)

et al. 2016

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There is growing interest in latitudinal effects on animal behaviour and life history. One recent focus is on birdsong, which is hypothesized to be more elaborated or complex in the north temperate zone compared with the tropics. Current evidence is mixed and based on cross-species comparisons, or single species with restricted distributions. We circumvent these limitations using a transcontinental sample of 358 songs from house wrens (Troglodytes aedon) at 281 locations spanning more than 1008 of latitude (528 N-558 S) across the Americas. We found a significant latitudinal gradient in several basic elements of song performance and complexity between north temperate and tropical populations. Furthermore, we document convergence in song patterns between populations at higher latitudes in the Northern and Southern Hemispheres. Effects were strongest for the number of elements in a song, and the rate of element production, both increasing towards the poles, with similar but weaker effects for other song dimensions (e.g. number of unique elements, trills and trill rate). We consider possible causes related to variable habitats and morphology, concluding that the shorter breeding seasons at higher latitudes in both hemispheres may favour greater song elaboration to mediate territory competition and mate choice.

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Section: Discussionmentioning

confidence: 99%

Section: Materials and Methods (A) Study Speciesmentioning

confidence: 99%

Transcontinental latitudinal variation in song performance and complexity in house wrens (Troglodytes aedon)

et al. 2016

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“…House wrens are well-suited to study sex allocation because females routinely differentially invest in sons and daughters in association with a variety of social and environmental conditions (reviewed in Bowers et al [26]). See Johnson [27] for more on house wren biology.…”

Section: Methodsmentioning

confidence: 99%

Sex-biased terminal investment in offspring induced by maternal immune challenge in the house wren ( Troglodytes aedon )

et al. 2012

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The reproductive costs associated with the upregulation of immunity have been well-documented and constitute a fundamental trade-off between reproduction and self-maintenance. However, recent experimental work suggests that parents may increase their reproductive effort following immunostimulation as a form of terminal parental investment as prospects for future reproduction decline. We tested the trade-off and terminal investment hypotheses in a wild population of house wrens (Troglodytes aedon) by challenging the immune system of breeding females with lipopolysaccharide, a potent but nonlethal antigen. Immunized females showed no evidence of reproductive costs; instead, they produced offspring of higher phenotypic quality, but in a sex-specific manner. Relative to control offspring, sons of immunized females had increased body mass and their sisters exhibited higher cutaneous immune responsiveness to phytohaemagglutinin injection, constituting an adaptive strategy of sex-biased allocation by immune-challenged females to enhance the reproductive value of their offspring. Thus, our results are consistent with the terminal investment hypothesis, and suggest that maternal immunization can induce pronounced transgenerational effects on offspring phenotypes.

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“…House wrens are almost exclusively insectivorous, and there are no reports of them consuming carotenoid-containing plant material (Johnson 1998). In the study population, females begin egg laying in late April-early May, laying one egg per day until the clutch of four to eight eggs is completed.…”

Section: Study Species and Study Areamentioning

confidence: 99%

“…The last clutches are laid in early August. Additional details on the biology of the house wren can be found in Johnson (1998).…”

Section: Study Species and Study Areamentioning

confidence: 99%

No Effect of Carotenoid Supplementation on Phytohemagglutinin Response or Body Condition of Nestling House Wrens

Sutherland

Thompson²,

Sakaluk

2012

Physiological and Biochemical Zoology

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Carotenoids are an essential and often limiting resource in animals and play important roles in immune system function. In birds, the period shortly after hatching is an energetically demanding stage characterized by rapid growth in body size and organ systems, including the immune system. Availability of carotenoids for the growing nestlings may be of particular importance and potentially limiting at this stage of development. We tested the hypothesis that the availability of carotenoids for the embryo in the egg and in the diet of nestlings limits the condition and immune responses of nestling house wrens (Troglodytes aedon Vieillot 1809), a species with melanin-based plumage pigments. In one experiment, nestlings within females' second broods were randomly assigned to receive either a control or a lutein supplement (2008); in a second experiment, females, before their first broods, were either induced to lay additional eggs or not induced, and nestlings within both kinds of broods were supplemented as in the first experiment (2009). There were no significant effects of lutein supplementation on nestling condition or phytohemagglutinin response. There was a significant effect of lutein supplementation on nestling mass in 2008, but the difference was opposite to that predicted. Moreover, even when breeding females were stressed by inducing them to lay supernumerary eggs, lutein supplementation of nestlings had no effect on the size or condition of nestlings hatching from these eggs. These results suggest that maternally derived lutein in the egg and that provided in the diet of nestlings are not limiting to normal development and to the components of the immune system involved in the phytohemagglutinin response of nestling house wrens.

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House Wren (Troglodytes aedon)

Cited by 66 publications

References 0 publications

Transcontinental latitudinal variation in song performance and complexity in house wrens (Troglodytes aedon)

Transcontinental latitudinal variation in song performance and complexity in house wrens (Troglodytes aedon)

Sex-biased terminal investment in offspring induced by maternal immune challenge in the house wren ( Troglodytes aedon )

No Effect of Carotenoid Supplementation on Phytohemagglutinin Response or Body Condition of Nestling House Wrens

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