Model parameters of growth curves of three meat-type lines of Japanese quail

Abstract

This study was focused on a comparison of the growth characteristics and parameters of three meat-type lines of Japanese quail. The body weight data of wild-type, dotted-white and extended-brown quail lines over time were collected and fitted to Richards equation. The relevant parameters were compared based on the Confidence Interval Test. Confidence Interval Test calculates the percentages of model predictions staying in the confidence intervals of the corresponding experimental data. Both sexes of brown quails showed lower weight gains than the other two lines. Behind the inflection point a decline in the absolute growth rate was slowest for brown females. In general, Richards model parameter values showed deviations of one line from the other lines to a varying extent. Shape parameter for males (0.335-0.618) and maturation index for females (0.067-0.077) tend to be the most critical parameters. When the overall models were used to predict the weight of other lines, the models of white and wild males showed great similarity. Overall model predictions for male brown and white quails, for female brown and wild-type quails showed the largest differences. Like in males, white and wild females were the closest lines but the likeliness percentage was lower than that for males. The proposed method of parameter comparison can be a useful tool for researchers working on biological modelling.

Relationship between Body Weight and Linear Body Measurements in Japanese Quail (<i>Coturnix coturnix japonica</i>)

“…Sexual dimorphism has previously been reported in favour of the male in duck [23], pigeon [24], and pheasants [25,26]. The growth pattern of male and female Japanese quails raised in other environments have been well documented [20,[27][28][29]. The growth pattern observed in the present study agrees with the pattern reported in refs.…”

Growth Patterns of Two Chinese Native Goose Breeds

“…So it showed that ST breed got higher weight then the SCW breed and also the growth rate (Tables 3-5), was faster in ST than the SCW. According to logistic, Gompertz and Bertalanffy the female reached the inflection point faster than the male but in Richards that was opposite in which male reached the inflection point faster than the female; that was also reported by Sezer & Tarhan (2005) in quail. That difference in inflection point could be due to Richards shape parameter (d), as it has greater propensity to change in response to environment, Wang et al (2012).…”

Evaluation of Growth Functions on Japanese Quail Lines

“…These results were in disagreement with the previous theory that stated Gompertz equation was the best fit for galiforms (Tzeng and Becker, 1981;Ricklefs, 1985;Anthony et al, 1991;Akbas and Oguz, 1998;Dogan et al, 2010). Brisbin et al (1986), Knízetová et al (1991aKnízetová et al ( , 1991b, Darmani-Kuhi et al (2003), Balcioğlu et al (2005), Sezer and Tarhan (2005) and Darmani-Kuhi et al (2010) successfully fitted Richards function to the poultry growth data. Further, in unselected quail population, Dogan et al (2010) were compared different growth functions and reported that Gompertz was the best function followed by Richards, and H3.…”