Phylogeny and Diversification of Modern Passerines

Barker, F. Keith

doi:10.1002/9781119990475.ch9

Cited by 12 publications

(11 citation statements)

References 149 publications

(149 reference statements)

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“…Manakins of the family Pipridae, are members of the Order Passeriformes that is generally further divided into the oscine and sub-oscine clades (Barker, 2011). As described previously, the oscine songbird brain exhibits a highly specialized circuitry (the neural song system) that is the basis for the learning and production of the complex, learned syringeal-based vocalizations, or songs, produced by this group of birds.…”

Section: Anatomy and Physiology Of Courtshipmentioning

confidence: 99%

Hormones and the neuromuscular control of courtship in the golden-collared manakin (Manacus vitellinus)

Schlinger

Barske

Day

et al. 2013

Frontiers in Neuroendocrinology

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Many animals engage in spectacular courtship displays, likely recruiting specialized neural, hormonal and muscular systems to facilitate these performances. Male golden-collared manakins (Manacus vitellinus) of Panamanian rainforests perform physically elaborate courtship displays that include novel forms of visual and acoustic signaling. We study the behavioral neuroendocrinology of this male’s courtship, combining field behavioral observations with anatomical, biochemical and molecular laboratory-based studies. Seasonally, male courtship is activated by testosterone with little correspondence between testosterone levels and display intensity. Females prefer males whose displays are exceptionally frequent, fast and accurate. The activation of androgen receptors (AR) is crucial for optimal display performance, with AR expressed at elevated levels in several neuromuscular tissues. Apparently, courtship enlists an elaborate androgen-dependent network that includes spinal motoneurons, skeletal muscles and somatosensory systems. This work highlights the value of studying non-traditional species to illuminate physiological adaptations and, hopefully, stimulates future research on other species with complex behaviors.

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Section: Anatomy and Physiology Of Courtshipmentioning

confidence: 99%

Hormones and the neuromuscular control of courtship in the golden-collared manakin (Manacus vitellinus)

Schlinger

Barske

Day

et al. 2013

Frontiers in Neuroendocrinology

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show abstract

“…Subsequently, 1 diverse lineage of this group (the Passerida) is thought to have dispersed into Eurasia (Barker et al 2004, Barker 2011 or Africa , with later dispersal into the New World. In terms of species numbers, the Emberizoidea represent the most successful New World lineage of Passerida, exceeded in diversity in the region only by the endemic radiation of suboscines (Barker et al 2004).…”

Section: Biogeographic Origins Of Emberizoideamentioning

confidence: 99%

Molecular Phylogenetics of a Clade of Lowland Tanagers: Implications for Avian Participation in the Great American Interchange

Burns

Racicot

2009

The Auk

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mentioning

confidence: 99%

“…Passerines represent over half of the avian diversity (Barker et al, 2004;Barker, 2011). These birds have radiated into a great variety of ecological niches and exhibit sophisticated repertoires of foraging techniques (Barker et al, 2004;Barker, 2011). The topographic distribution of retinal ganglion cells, however, reveals a general common plan, with insectivorous and nectarivorous passerines sharing the presence of a central fovea and a temporal area (Coimbra et al, 2006(Coimbra et al, , 2009(Coimbra et al, , 2014.…”

mentioning

confidence: 99%

Variations in retinal photoreceptor topography and the organization of the rod‐free zone reflect behavioral diversity in Australian passerines

Coimbra

Collin

Hart

2015

J of Comparative Neurology

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The avian retina possesses one of the most diverse complements of photoreceptor types among vertebrates but little is known about their spatial distribution. Here we used retinal wholemounts and stereological methods to present the first complete maps of the topographic distribution of rods and cones in four species of Australian passerines with diverse trophic specializations. All species studied have one central and one temporal rod-free zone. In the insectivorous yellow-rumped thornbill, the central rod-free zone is unusually large, occupying ∼17% (56°) of the retinal area (angular subtense), whereas in nectarivorous and frugivorous species it represents only ∼0.1% (5-7°) to 0.3% (10°) of the retinal area (angular subtense). In contrast, the temporal rod-free zone varies little between species (∼0.02-0.4%; 2-10°). In all species, rods follow a pronounced dorsoventral gradient with highest densities in the ventral retina. The topographic distribution of cones is concentric and reveals a central fovea and a temporal area. In the yellow-rumped thornbill, cone densities form an extended plateau surrounding the fovea, beyond which densities fall rapidly towards the retinal periphery. For the other species, cone densities decline gradually along a foveal to peripheral gradient. Estimates of spatial resolving power calculated using cone peak densities are higher in the central fovea (19-41 cycles/degree) than in the temporal area (9-15 cycles/degree). In conclusion, we suggest that the unusual organization of the rod-free zone and the distinct topographic distribution of rods and cones correlate with specific ecological needs for enhanced visual sensitivity and spatial resolution in these birds.

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Phylogeny and Diversification of Modern Passerines

Cited by 12 publications

References 149 publications

Hormones and the neuromuscular control of courtship in the golden-collared manakin (Manacus vitellinus)

Hormones and the neuromuscular control of courtship in the golden-collared manakin (Manacus vitellinus)

Molecular Phylogenetics of a Clade of Lowland Tanagers: Implications for Avian Participation in the Great American Interchange

Variations in retinal photoreceptor topography and the organization of the rod‐free zone reflect behavioral diversity in Australian passerines

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