Noninvasive age estimation in rodents by measuring incisors width, with the Zaisan mole vole (Ellobius tancrei) as an example

Kristina V. Kuprina, Antonina V. Smorkatcheva

Результат исследований: Научные публикации в периодических изданияхстатья

Выдержка

Non-invasive age estimation is critically important for many field studies but often it represents a significant challenge. In rodents, upper incisors represent a part of a cranium which can be readily measured in an alive animal. We propose an age estimation method based on the measurements of both upper incisors' width (IW) for a subterranean rodent, Ellobius tancrei. The IW measurements for 77 laboratory-born females and 81 males were fitted, separately for the sexes, by sigmoidal Gompertz growth functions to obtain the asymptotic values. Based on the data set encompassing pre-asymptotic ages, we then derived a polynomial regression model with log-transformed age as a predictor. The analysis revealed no statistically significant sex difference in growth patterns. Derived model explained 91% of IW variation and was used to obtain predicted values of age and their 95% prediction intervals through inverse calculations. We conclude that IW is a potentially useful age indicator for mole voles and possibly other rodents in cases when invasive or time-consuming methods are non-appropriate.

Язык оригиналаанглийский
Страницы (с-по)64-69
Число страниц6
ЖурналMammalia
Том83
Номер выпуска1
Ранняя дата в режиме онлайн25 апр 2018
DOI
СостояниеОпубликовано - янв 2019

Отпечаток

rodent
rodents
cranium
estimation method
gender differences
measuring
Ellobius
prediction
gender
animal
methodology
animals

Предметные области Scopus

  • Экология, эволюция поведение и систематика
  • Зоология и животноводство

Цитировать

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abstract = "Non-invasive age estimation is critically important for many field studies but often it represents a significant challenge. In rodents, upper incisors represent a part of a cranium which can be readily measured in an alive animal. We propose an age estimation method based on the measurements of both upper incisors' width (IW) for a subterranean rodent, Ellobius tancrei. The IW measurements for 77 laboratory-born females and 81 males were fitted, separately for the sexes, by sigmoidal Gompertz growth functions to obtain the asymptotic values. Based on the data set encompassing pre-asymptotic ages, we then derived a polynomial regression model with log-transformed age as a predictor. The analysis revealed no statistically significant sex difference in growth patterns. Derived model explained 91{\%} of IW variation and was used to obtain predicted values of age and their 95{\%} prediction intervals through inverse calculations. We conclude that IW is a potentially useful age indicator for mole voles and possibly other rodents in cases when invasive or time-consuming methods are non-appropriate.",
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Noninvasive age estimation in rodents by measuring incisors width, with the Zaisan mole vole (Ellobius tancrei) as an example. / Kuprina, Kristina V.; Smorkatcheva, Antonina V.

В: Mammalia, Том 83, № 1, 01.2019, стр. 64-69.

Результат исследований: Научные публикации в периодических изданияхстатья

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