Accuracy of body weight prediction in Alpine ibex (<i>Capra ibex,</i> L. 1758) using morphometry

Bassano, Bruno; Bergero, Domenico; Peracino, A.

doi:10.1046/j.1439-0396.2003.00418.x

Cited by 25 publications

(19 citation statements)

References 14 publications

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“…The average changes in length between lambs fed high energy diet compared to lambs fed the control diet might be due to better utilization of the feed during the experimental period. The results of this study are in agreement with Bassano et al (2003) results. The researchers also found a relationship between weight and body measurements which changed mainly by the effect of sex and season.…”

Section: Discussionsupporting

confidence: 92%

Performance, Carcass Percentage, and Production Cost for Awassi Lambs Fed High Energy Diet for Short Fattening Period

Ata¹,

Al-Lataifeh²,

Altarawneh³

2017

JAS

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An experiment was conducted to indicate the effect of feeding high energy diet for 45 days on male and female Awassi lambs’ performance, carcass percentage, and cost of production. A total of twenty four Awassi lambs (12 males, and 12 females) averaging 18.2±0.70 kg body weight were used. Lambs were assigned randomly to two different groups (groups A and B); each group had twelve lambs (6 males and 6 females) and fed two different diets (low energy diet and high energy diet). Feed intake, total gain, average daily gain and feed conversion ratio was calculated and body measurements (height and length) were recorded. Lambs were slaughtered at the end of experiment, to evaluate carcass percentage. Cost of production was calculated based on ingredients’ price at the time of the experiment. Final body weight, weight gain, and average daily gain were greater (p < 0.05); while feed conversion ratio was lower (p < 0.05) for lambs fed high energy diet than lambs fed low energy diet. Body length differences measured to be greater (p < 0.05) for male lambs fed high energy diet than other lambs. Fasted weight, hot carcass weight, and dressing percentage were higher (p < 0.05) for lambs fed the high energy diet. Cost of gain was lower (p < 0.05) for lambs in group B compared to lambs in group A. Therefore, the economical efficiency in this experiment was greater for lambs fed high energy diet than lambs fed the control diet during 45 days fattening period.

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Section: Discussionsupporting

confidence: 92%

Performance, Carcass Percentage, and Production Cost for Awassi Lambs Fed High Energy Diet for Short Fattening Period

Ata¹,

Al-Lataifeh²,

Altarawneh³

2017

JAS

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“…First, body mass was available for more species than were body length, shoulders height, condylobasal length, and horn length. Second, several studies have reported close relationships between body mass and linear body measurements or measurements of the skeleton (Fandos, Vigal & Fernandez‐Lopez, 1989; Bassano, Bergero & Peracino, 2003).…”

Section: Methodsmentioning

confidence: 99%

Sexual size dimorphism in domestic goats, sheep, and their wild relatives

Polák¹,

Frynta²

2009

Biological Journal of the Linnean Society

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Sexual size dimorphism (SSD) is a widespread phenomenon in different animal taxa, including the subfamily of goats and sheep (Caprinae), which belongs to the most dimorphic mammalian groups. Rensch's rule describes the pattern of SSD, claiming that larger species generally exhibits higher male to female body size ratio. Agreement with Rensch's rule is manifested by slope of the allometric relationship between male and female body size exceeding one. To test this rule, we analysed the data available in the literature on adult body mass of males and females in domestic goat and sheep breeds (169 and 303, respectively) and 37 wild species/subspecies of the subfamily Caprinae. According to the current phylogenetical hypotheses, there are six distinct monophyletic groups with different levels of SSD (expressed as M/F): (1) wild goats (1.83); (2) wild sheep (1.67); (3) non‐European chamoises, including Ovibos moschatus (1.18); (4) European chamoises (1.27); (5) Budorcas taxicolor (1.01); and (6) Pantholops hodgsonii (1.65). Domestication has led to a remarkable decline in SSD of both domestic goats (1.36) and sheep (1.41). The highest regression slope of the relationship between male and female body size is that estimated for wild goats (1.32), followed by wild sheep (1.24), non‐European chamoises (1.14), domestic sheep (1.13), and domestic goats (1.10). Nevertheless, only the last two values are statistically different from one and thus corroborate Rensch's rule. © 2009 The Linnean Society of London, Biological Journal of the Linnean Society, 2009, 98, 872–883.

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“…Lewis and Brotherstone (2002) and Fischer et al (2004), stated that regression method had a significant contribution in the prediction and assessment of growth of lambs. Some scholars (Bassano et al, 2001;Adeyinka and Mohammed, 2006;Thiruvenkadan, 2005;Hamito, 2009) suggested that the number and particular type of traits required in a model depended on the breed, age of animals, season. Variables BWB and BW60 did not qualify for inclusion in the model because the condition P <0.05 (Table 6).…”

Section: Resultsmentioning

confidence: 99%

The linear relationship between growth traits of Sharplanina lambs in extensive farming practices

et al. 2013

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The fastest phase of growth, observed in young animals, is often assumed to be linear, and linear regressions or ratios between BW gain and time are used to model growth. However, growth curves, due to their flexibility, are likely to be more suitable to describe even early growth. The research was performed in the region of Sharplanina Mountain in the population of the local Šarplanina breed of sheep. The following traits of lambs were considered: BWB, BW30, BW60 and BW90. Statistical analysis was conducted using the Pearson's correlation and multivariate linear regression model. This involved computing all possible and the best subset regression equation. Each equation was then assessed by its coefficient of determination (R2) and the constant based on the number of variable that used for the prediction. Results showed that weight of lambs from birth to weaning increased by about six times. Specifically lambs achieved an average total gain of 17.66 kg, or 196 g per day. There were a very significant correlation (P<0.01) between BWB and BW30, BW60 and BW90. Likewise, shown a very significant correlation (P<0.01) between BW30-BW60, BW30-BW90 and BW60-BW90. Also shown the coefficient of multiple determinations (R-squared R2) was 0.507 which means that 50.7% of the variance BW90, determined variance of the predictor variables represented in the model. Adjusted coefficient of multiple determination (adjusted R2) is 0.506 which means that 50.6% of the variance BW90, determined variance of the predictor variables that are in the model. Any increase in weight of lambs during the observed period of age is associated with an increase of dependent variable BW90. In particular, any increase in BW30 to 1 kg, is associated with an increase in BW90 to 1.928 kg.

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Accuracy of body weight prediction in Alpine ibex (Capra ibex, L. 1758) using morphometry

Cited by 25 publications

References 14 publications

Performance, Carcass Percentage, and Production Cost for Awassi Lambs Fed High Energy Diet for Short Fattening Period

Performance, Carcass Percentage, and Production Cost for Awassi Lambs Fed High Energy Diet for Short Fattening Period

Sexual size dimorphism in domestic goats, sheep, and their wild relatives

The linear relationship between growth traits of Sharplanina lambs in extensive farming practices

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