Gender identification using acoustic analysis in birds without external sexual dimorphism

Volodin, Ilya A.; Volodina, Elena V.; Klenova, Anna V.; Matrosova, Vera A.

doi:10.1186/s40657-015-0033-y

Cited by 38 publications

(42 citation statements)

References 83 publications

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“…Physical characteristics, such as differences in color, size, alternative plumage (Rohwer, ), and presence or absence of features such as antlers in ungulates (Smith & McDonald, ), are used to differentiate ages, stages, or sex categories. Behavioral differences, including sexual segregation (Bowyer, ; Gregory, Lung, Gering, & Swanson, ) and alternative auditory song patterns (Volodin, Volodina, Klenova, & Matrosova, ), are another method used to classify individuals. Classifications are rarely perfect, creating a need to deal with the uncertainty that arises if only some individuals are classified.…”

Section: Introductionmentioning

confidence: 99%

A hierarchical Bayesian approach for handling missing classification data

Ketz

Johnson

Hooten

et al. 2019

Ecology and Evolution

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Ecologists use classifications of individuals in categories to understand composition of populations and communities. These categories might be defined by demographics, functional traits, or species. Assignment of categories is often imperfect, but frequently treated as observations without error. When individuals are observed but not classified, these “partial” observations must be modified to include the missing data mechanism to avoid spurious inference. We developed two hierarchical Bayesian models to overcome the assumption of perfect assignment to mutually exclusive categories in the multinomial distribution of categorical counts, when classifications are missing. These models incorporate auxiliary information to adjust the posterior distributions of the proportions of membership in categories. In one model, we use an empirical Bayes approach, where a subset of data from one year serves as a prior for the missing data the next. In the other approach, we use a small random sample of data within a year to inform the distribution of the missing data. We performed a simulation to show the bias that occurs when partial observations were ignored and demonstrated the altered inference for the estimation of demographic ratios. We applied our models to demographic classifications of elk (Cervus elaphus nelsoni) to demonstrate improved inference for the proportions of sex and stage classes. We developed multiple modeling approaches using a generalizable nested multinomial structure to account for partially observed data that were missing not at random for classification counts. Accounting for classification uncertainty is important to accurately understand the composition of populations and communities in ecological studies.

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Section: Introductionmentioning

confidence: 99%

A hierarchical Bayesian approach for handling missing classification data

Ketz

Johnson

Hooten

et al. 2019

Ecology and Evolution

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“…Discrimination of sex in poultry is done using different methods such as examining of feet, neck, feather colour and length as well as cloaca control, radiographic examination, footprint and hormonal or operational methods (Cerit and Avanus, 2007).Besides its importance for behavioural studies and wildlife management (Henry et al, 2015;Volodin et al, 2015), determination of sex is crucial for the profitability of agribusinesses. Zoometric measurement as a tool in sex discrimination has been examined in, for instance, mockingbirds (Fuchs and Montalti, 2016), owls (Tornberg et al, 2016), coots (Minias, 2015), Muscovy ducks (Oguntunji and Ayorinde, 2014) showing rather inconclusive results concerning predictability in terms of species and measurements traits.…”

Section: Introductionmentioning

confidence: 99%

Sex Determination of Japanese Quails (Coturnix Coturnix Japonica) using with Zoometric Measurements

Rathert

Güven

Üçkardeş

2017

Turkish JAF Sci.Tech.

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The difficulty of sex determination in most poultry species causes significant financial losses for poultry production as birds cannot be separated at early stages of growth for meat or egg production. Therefore it is important to determine bird's sex with zoometric parameters. This study was carried out to determine the sex of Japanese quails with zoometric measurements, such as live weight, body length, chest depth and chest width. Eighty-eight male and female Japanese quail chicks were used individually for live weight, chest depth (mm), chest width (mm) and body length (mm) with using digital scaled balance and caliper for every week over a period of six weeks. The weekly collected data were applied to t test for estimating the sex discrimination. The Pearson's correlation was applied for examining the interrelationship between sex and biometric traits. The results indicated that there was a significant positive correlation between live weight and body length beginning with the 2 nd week. Therefore, zoometric measurement of these body traits is suitable for discriminating the sex of Japanese quails in early phase of life.

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“…However, others mechanisms of sex recognition by mother must be explored, for instance mechanisms based on vocal discrimination. Indeed, studies have reported sexual signature of calls in chicks from some avian species (Volodin, Volodina, Klenova, & Matrosova, 2015).…”

Section: Discussionmentioning

confidence: 99%

Mother‐chick interactions are affected by chicks’ sex and brood composition in Japanese quail

Aigueperse¹,

Houdelier²,

Nicolle³

et al. 2019

Developmental Psychobiology

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Sex is a trait which leads mothers to invest asymmetrically in their young, especially in species with a strong dimorphism. Authors usually consider that members of the largest sex require the most investment by mothers. In other cases, mothers care preferentially for members of the sex that increase their fitness, e.g. males, in numerous species. In quail, a precocial bird, mother seems to take more care of their males which are more sensitive to their separation. This study investigates the influence of chicks’ sex and brood's sexual composition on the maternal behavior of quail. We evaluated three batches of mothers, composed of (a) unisex broods of males (MM), (b) unisex broods of females (FF), and (c) mixed sex broods (Mx). We recorded mother‐chick interactions during 11 days of mothering. We found that MM mothers spent more time warming their chicks and FF mothers were more active. Moreover, females rejected more aggressively and earlier their female chicks than their male chicks. Finally, Mx chicks, whatever their sex, interacted more with their mothers. Our results highlight a greater quantity and quality of maternal care towards male. Mothers invest more in male chicks. We discussed results in terms of each sex's needs.

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Gender identification using acoustic analysis in birds without external sexual dimorphism

Cited by 38 publications

References 83 publications

A hierarchical Bayesian approach for handling missing classification data

A hierarchical Bayesian approach for handling missing classification data

Sex Determination of Japanese Quails (Coturnix Coturnix Japonica) using with Zoometric Measurements

Mother‐chick interactions are affected by chicks’ sex and brood composition in Japanese quail

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