Classification of hybrid crows in quail using artificial neural networks

Derégnaucourt, Sébastien; Guyomarc’H, Jean-Charles; Richard, Vincent

doi:10.1016/s0376-6357(01)00188-7

Cited by 23 publications

(29 citation statements)

References 33 publications

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“…It is now closed and no female has been introduced since 1992. The founders were captured in the wild and showed neither morphological nor behavioural characteristics of Japanese quail (Derégnaucourt et al 2001). We randomly sampled several populations of Japanese quail: the INRA experimental precocious layer DD (n = 15) and EE (n = 15) lines (Minvielle et al 2000), three commercial strains from the breeding company Caillor, including two broiler lines (line C, n = 20; line K, n = 21) and one layer line (line A; n = 20) and one captive non-domesticated C. japonica (n = 49) population maintained for conservation purposes at the National Institute of Livestock and Grassland Science (Tsukuba, Japan).…”

Section: Samplesmentioning

confidence: 99%

“…It has been shown that these taxa could interbreed in captivity, and F 1 , F 2 and Back Cross (BC) quails have been produced experimentally (Derégnaucourt et al 2001;Minvielle et al 2006). In Europe, the two taxa come into contact artificially, mainly through the release of domestic Japanese quails, or hybrids, for hunting (Guyomarc'h 2003;Puigcerver et al 2007), raising the issue of the introgressive hybridization of common quail populations by Japanese quail.…”

Section: Introductionmentioning

confidence: 99%

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Evidence for introgressive hybridization of wild common quail (Coturnix coturnix) by domesticated Japanese quail (Coturnix japonica) in France

Chazara

Minvielle

Roux³

et al. 2009

Conserv Genet

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International audienceMany cases of introgressive hybridization have been reported among birds, particularly following introduction to the natural environment of individuals belonging to non-native similar taxa. This appears to be the case for common quail (Coturnix coturnix) in France where wild populations artificially come into contact with domesticated Japanese quail (Coturnix japonica) raised for meat and egg production but sometimes released for hunting purposes. In order to highlight the possible existence of gene flows between both taxa, a comparison of nuclear (25 microsatellite loci) and mitochondrial (sequencing and RFLP) DNA polymorphisms was performed on 375 common quails (from France, Spain and Morocco) and 140 Japanese quails (from France and Japan). Genetic diversity was assessed, and analyses (Factorial Correspondence Analysis, Bayesian admixture) of molecular polymorphisms revealed clear differentiation between the two taxa, making it possible to detect for hybrids among quails sampled in the wild. Eight birds expected to be common quail were found to be two pure Japanese quail, one probable backcross to C. japonica, three F1/F2 hybrids, and two probable backcrosses to Coturnix coturnix. These results show that Japanese quails were released and suggest that the two taxa hybridize in the wild. They confirm the urgent need for preventing the release of pure Japanese or hybrid quails to preserve the genetic integrity of C. coturnix. The tools developed for this study should be useful for accurate monitoring of wild quail populations within the framework of avifauna management programs

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Section: Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evidence for introgressive hybridization of wild common quail (Coturnix coturnix) by domesticated Japanese quail (Coturnix japonica) in France

Chazara

Minvielle

Roux³

et al. 2009

Conserv Genet

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“…Japanese and admixed quails have vocalizations that differ from those of common quails, with first generation hybrid male crows being intermediate between domestic Japanese quail and common quail (Derégnaucourt et al, 2001), and this has often been used to characterize the identity of free-ranging quail males (Guyomarc'h and Guyomarc'h, 1996;Collins and Goldsmith, 1998;Barilani et al, 2005;Puigcerver et al, 2007). Using this approach, hybrid quails were first detected in Catalonia by members of our research group in 1990 in an area close to the study site (Rodríguez-Teijeiro et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Detecting slow introgression of invasive alleles in an extensively restocked game bird

et al. 2014

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Interbreeding of two species in the wild implies introgression of alleles from one species into the other only when admixed individuals survive and successfully backcross with the parental species. Consequently, estimating the proportion of first generation hybrids in a population may not inform about the evolutionary impact of hybridization. Samples obtained over a long time span may offer a more accurate view of the spreading of introgressed alleles in a species' gene pool. Common quail (Coturnix coturnix) populations in Europe have been restocked extensively with farm quails of hybrid origin (crosses with Japanese quails, C. japonica). We genetically monitored a common quail population over 15 years to investigate whether genetic introgression is occurring and used simulations to investigate our power to detect it. Our results revealed that some introgression has occurred, but we did not observe a significant increase over time in the proportion of admixed individuals. However, simulations showed that the degree of admixture may be larger than anticipated due to the limited power of analyses over a short time span, and that observed data was compatible with a low rate of introgression, probably resulting from reduced fitness of admixed individuals. Simulations predicted this could result in extensive admixture in the near future.

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“…Analyzing sounds in terms of such simple features is relatively easy to perform, and the results often suggest an intuitive mechanistic hypothesis (in contrast to spectrographic cross correlation (SCC) and neural-network classification methods). [7][8][9][10] In sum, the advantage of our approach is simplicity and interpretability, and its most significant weakness is that the features (and metric system) are "ad hoc," so that some important information about the sound might have been excluded.…”

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confidence: 99%

Studying the Song Development Process: Rationale and Methods

Tchernichovski

Lints

Derégnaucourt

et al. 2004

Annals of the New York Academy of Sciences

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Current technology makes it possible to measure song development continuously throughout a vocal ontogeny. Here we briefly review some of the problems involved and describe experimental and analytic methods for automatic tracing of vocal changes. These techniques make it possible to characterize the specific methods the bird uses to imitate sounds: an automated song recognition procedure allows continuous song recording, followed by automated sound analysis that partition the song to syllables, extract acoustic features of each syllable, and summarize the entire song development process over time into a single database. The entire song development is then presentable in the form of images or movie clips. These Dynamic Vocal Development (DVD) maps show how each syllable type emerges, and how the bird manipulates syllable features to eventually approximate the model song. Most of the experimental and analytic methods described here have been organized into a software package, which also allows combined neural and sound recording to monitor changes in brain activity as vocal learning occurs. The software is available at http://ofer.sci.ccny.cuny.edu. KEYWORDS: song development; Dynamic Vocal Development (DVD) maps; sound spectrogram; sound analysis HISTORICAL PERSPECTIVE: FROM THE SOUND SPECTROGRAM TO AUTOMATED SOUND ANALYSISWhen listening to birdsong, it is immediately apparent that each song has a distinct rhythmic and sometimes even melodic structure. Songs of individual birds in a flock sound similar to each other and differ from those of other flocks. As early as the 18 th century, Barrington noted that the songs of cross-fostered birds differed from the species-typical song, suggesting a role for vocal learning.

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Classification of hybrid crows in quail using artificial neural networks

Cited by 23 publications

References 33 publications

Evidence for introgressive hybridization of wild common quail (Coturnix coturnix) by domesticated Japanese quail (Coturnix japonica) in France

Evidence for introgressive hybridization of wild common quail (Coturnix coturnix) by domesticated Japanese quail (Coturnix japonica) in France

Detecting slow introgression of invasive alleles in an extensively restocked game bird

Studying the Song Development Process: Rationale and Methods

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