Poephila

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Griffith, Simon C. - One of the best experts on this subject based on the ideXlab platform.

  • The role of the Ord Arid Intrusion in the historical and contemporary genetic division of long-tailed finch subspecies in northern Australia
    John Wiley & Sons Inc, 2016
    Co-Authors: Rollins, Lee A., Svedin Nina, Pryke Sarah, Griffith, Simon C.
    Abstract:

    The effect of separation by biogeographic features followed by secondary contact can blur taxonomic boundaries and produce complex genetic signatures. We analyzed population structure and gene flow across the range of the long-tailed finch (Poephila acut

  • Extra-pair paternity in the long-tailed finch Poephila acuticauda
    'PeerJ', 2016
    Co-Authors: Van Rooij, Erica P, Rollins, Lee A., Holleley, Clare E, Griffith, Simon C.
    Abstract:

    Although the majority of passerine birds are socially monogamous, true genetic monogamy is rare, with extra-pair paternity (EPP) occurring in almost 90% of surveyed socially monogamous species. We present the first molecular data on the genetic breeding system of the long-tailed finch, Poephila acuticauda, a grass finch endemic to the tropical northern savannah of Australia. Although the species forms socially monogamous pair bonds during the breeding season, we found that extra-pair males sired 12.8% of 391 offspring, in 25.7% of 101 broods. Our findings provide only the second estimate of extra-pair paternity in the estrildid finch family.10 page(s

  • Stable recombination hotspots in birds
    'American Association for the Advancement of Science (AAAS)', 2015
    Co-Authors: Singhal Sonal, Griffith, Simon C., Leffler, Ellen M., Sannareddy Keerthi, Turner Isaac, Venn Oliver, Hooper, Daniel M., Mcvean Gil, Przeworski Molly, Strand Alva
    Abstract:

    The DNA-binding protein PRDM9 has a critical role in specifying meiotic recombination hotspots in mice and apes, but it appears to be absent from other vertebrate species, including birds. To study the evolution and determinants of recombination in species lacking the gene that encodes PRDM9, we inferred fine-scale genetic maps from population resequencing data for two bird species: the zebra finch, Taeniopygia guttata, and the long-tailed finch, Poephila acuticauda. We found that both species have recombination hotspots, which are enriched near functional genomic elements. Unlike in mice and apes, most hotspots are shared between the two species, and their conservation seems to extend over tens of millions of years. These observations suggest that in the absence of PRDM9, recombination targets functional features that both enable access to the genome and constrain its evolution.5 page(s

  • Breeding ecology of an Australian estrildid, the Long-tailed Finch (Poephila acuticauda)
    'CSIRO Publishing', 2011
    Co-Authors: Van Rooij, Erica P, Griffith, Simon C.
    Abstract:

    We studied the breeding ecology of the Long-tailed Finch (Poephila acuticauda) over three seasons between 2008 and 2010 in the Kimberley region, Western Australia. Breeding took place from February to September, with a peak in laying in MarchApril. Pairs produced up to three successful broods per season with a mean (s.e.) clutch-size of 4.661.13, mean broods of 3.981.10 young, and an average of 3.871.10 fledged young per successful nest. Nesting failure occurred frequently, with 66.2% of breeding attempts failing to fledge any offspring. In nests where at least one egg hatched (47% of nests), 8717% of the eggs hatched. In successful nests, 989% of all nestlings fledged. Annual breeding success was relatively consistent over the three breeding seasons, with 26.840.8% of all eggs resulting in fledged young. Successful nesting attempts lasted an average of 393.3 days, with both parents contributing to incubation (duration 13.62.3 days) and brooding and feeding during the nestling period (duration 20.62 days). Site- and mate-fidelity were high, with pairs staying together during and between breeding seasons and 60% of pairs breeding in the same area in a subsequent year.7 page(s

  • Interference from long-tailed finches constrains reproduction in the endangered Gouldian finch
    'Wiley', 2011
    Co-Authors: Brazill-boast James, Van Rooji Erica, Pryke, Sarah R, Griffith, Simon C.
    Abstract:

    1. Interspecific interference competition for nest-sites among cavity-nesting birds can have important effects on reproductive fitness and the distribution of competing species. 2. We observed interference at nest-sites in free-living populations of the endangered Gouldian finch (Erythrura gouldiae) and sympatric long-tailed finch (Poephila acuticauda), and also experimentally tested the relative strength and effect of interference at nest-sites in captive populations. 3.  Levels of competitive interference at nest-sites in the wild were high for Gouldian, but not long-tailed finches, and interference frequency was inversely related to Gouldian finch reproductive success. High levels of interference conferred reduced fledging success but did not affect offspring condition. 4.  Captive experiments corroborated the field data, also demonstrating fitness costs of interspecific competition, and that long-tailed finches dominated resources under standardized conditions. 5.  Such asymmetrical competition dynamics are likely to constrain reproduction in Gouldian finch populations, potentially affecting recruitment and hindering the recovery of remaining populations of this endangered species.10 page(s

James Moloney - One of the best experts on this subject based on the ideXlab platform.

Simon C. Griffith - One of the best experts on this subject based on the ideXlab platform.

  • Extra-pair paternity in the long-tailed finch Poephila acuticauda.
    PeerJ, 2016
    Co-Authors: Erica P. Van Rooij, Lee A. Rollins, Clare E. Holleley, Simon C. Griffith
    Abstract:

    Although the majority of passerine birds are socially monogamous, true genetic monogamy is rare, with extra-pair paternity (EPP) occurring in almost 90% of surveyed socially monogamous species. We present the first molecular data on the genetic breeding system of the long-tailed finch, Poephila acuticauda, a grass finch endemic to the tropical northern savannah of Australia. Although the species forms socially monogamous pair bonds during the breeding season, we found that extra-pair males sired 12.8% of 391 offspring, in 25.7% of 101 broods. Our findings provide only the second estimate of extra-pair paternity in the estrildid finch family.

  • Interspecific Aggression for Nest Sites: Model Experiments with Long-Tailed Finches (Poephila acuticauda) and Endangered Gouldian Finches (Erythrura gouldiae)
    The Auk, 2011
    Co-Authors: Dhanya Pearce, Sarah R. Pryke, Simon C. Griffith
    Abstract:

    ABSTRACT. For cavity-nesting birds, tree cavities often represent a critical, defendable, and limiting resource that is frequently under intense interspecific competition. However, the dynamics of interspecific conflict resolution, especially between species of similar size, are often unclear. We experimentally tested aggression and nest-defense behaviors in Gouldian Finches (Erythrura gouldiae) and Long-tailed Finches (Poephila acuticauda), two sympatric, cavity-nesting estrildid finches that are very similar in size, ecology, and nest-site requirements. Mounted taxidermie models of conspecific and heterospecific nest-site competitors (black and red Gouldian Finch morph and Long-tailed Finch models), as well as a control noncompetitor (Black-chinned Honeyeater [Melithreptus gularis]), were presented to Gouldian and Long-tailed finches. These two competing species differed in their overall responses to simulated intruders and in their relative aggression toward conspecific and heterospecific intruders. Lo...

  • Breeding ecology of an Australian estrildid, the Long-tailed Finch (Poephila acuticauda)
    Emu - Austral Ornithology, 2011
    Co-Authors: Erica P. Van Rooij, Simon C. Griffith
    Abstract:

    We studied the breeding ecology of the Long-tailed Finch (Poephila acuticauda) over three seasons between 2008 and 2010 in the Kimberley region, Western Australia. Breeding took place from February to September, with a peak in laying in March–April. Pairs produced up to three successful broods per season with a mean (±s.e.) clutch-size of 4.66 ± 1.13, mean broods of 3.98 ± 1.10 young, and an average of 3.87 ± 1.10 fledged young per successful nest. Nesting failure occurred frequently, with 66.2% of breeding attempts failing to fledge any offspring. In nests where at least one egg hatched (47% of nests), 87 ± 17% of the eggs hatched. In successful nests, 98 ± 9% of all nestlings fledged. Annual breeding success was relatively consistent over the three breeding seasons, with 26.8–40.8% of all eggs resulting in fledged young. Successful nesting attempts lasted an average of 39 ± 3.3 days, with both parents contributing to incubation (duration 13.6 ± 2.3 days) and brooding and feeding during the nestling period (duration 20.6 ± 2 days). Site- and mate-fidelity were high, with pairs staying together during and between breeding seasons and 60% of pairs breeding in the same area in a subsequent year.

  • Interference from long-tailed finches constrains reproduction in the endangered Gouldian finch
    Journal of Animal Ecology, 2010
    Co-Authors: James Brazill-boast, Erica P. Van Rooij, Sarah R. Pryke, Simon C. Griffith
    Abstract:

    Summary 1. Interspecific interference competition for nest-sites among cavity-nesting birds can have important effects on reproductive fitness and the distribution of competing species. 2. We observed interference at nest-sites in free-living populations of the endangered Gouldian finch (Erythrura gouldiae) and sympatric long-tailed finch (Poephila acuticauda), and also experimentally tested the relative strength and effect of interference at nest-sites in captive populations. 3. Levels of competitive interference at nest-sites in the wild were high for Gouldian, but not long-tailed finches, and interference frequency was inversely related to Gouldian finch reproductive success. High levels of interference conferred reduced fledging success but did not affect offspring condition. 4. Captive experiments corroborated the field data, also demonstrating fitness costs of interspecific competition, and that long-tailed finches dominated resources under standardized conditions. 5. Such asymmetrical competition dynamics are likely to constrain reproduction in Gouldian finch populations, potentially affecting recruitment and hindering the recovery of remaining populations of this endangered species.

  • First record of cooperative breeding in an Australian estrildid, the Long-tailed Finch (Poephila acuticauda)
    Emu - Austral Ornithology, 2009
    Co-Authors: Erica P. Van Rooij, Simon C. Griffith
    Abstract:

    Long-tailed Finches (Poephila acuticauda) breeding in natural cavities and nest-boxes were monitored during the breeding season, between March and September 2008, as part of an ongoing field study near Wyndham, northern Western Australia. Towards the end of the breeding season, two adults and their son, who had fledged 4 months earlier, were observed together over many days feeding nestlings (10–17 days old) produced by the adults in another breeding attempt. This is the first description of cooperative breeding in an Australian estrildid finch. Based on these observations, we do not intend to suggest that the Long-tailed Finch should be considered a cooperatively breeding species, but such data help us to understand the variation that exists with respect to familial relations and parental care and provides a foundation for work addressed at understanding the evolutionary origins of cooperative behaviour in birds.

Britta Denise Hardesty - One of the best experts on this subject based on the ideXlab platform.

Juliana Rechetelo - One of the best experts on this subject based on the ideXlab platform.

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