Age- and sex-dependent regression models for predicting the live weight of West African Dwarf goat from body measurements

2009 ◽  
Vol 42 (5) ◽  
pp. 969-975 ◽  
Author(s):  
O. S. Sowande ◽  
B. F. Oyewale ◽  
O. S. Iyasere
Keyword(s):  
Regression Models ◽  
Live Weight ◽  
West African ◽  
Body Measurements ◽  
West African Dwarf ◽  
West African Dwarf Goat ◽  
Age And Sex

scholarly journals Age- and sex-dependent regression parameters for estimating live weight frim body measurements of West African Dwarf sheep

2021 ◽  
Vol 39 (1) ◽  
pp. 169-179
Author(s):  
O. S. Sowande ◽  
B. A Orebela ◽  
O. S Iyasere
Keyword(s):  
Body Size ◽  
Linear Regression ◽  
Regression Models ◽  
Live Weight ◽  
West African ◽  
The Body ◽  
Body Measurements ◽  
Age Group ◽  
Best Fit ◽  
Age And Sex

The relationships between live weight and eight body measurements of West African Dwarf (WAD) sheep were studied using 300 animals under farm condition. The animals were categorized based on age and sex. Data obtained on height at withers (HW), heart girth (HG), body length (BL), head length (HL), length of hindquarter (LHQ), width of hindquarter (WHQ), head width(HDW), and loin girth (LG) were fitted into simple linear (change in body measurement is directly proportional to weight or body size), allometric (body measurements do not necessarily change in direct proportion to weight or body size), and multiple linear regression models to predict live weight from the body measurements according to age group and sex. Results showed that live weight and body measurements of ewe were higher than that of the ram. Live weight, HG, HW, WHQ, LG, BL, LHQ, HL, and HW increased with the age of the animals. In multiple linear regression model, WHQ, LHQ, HW, HL and HDW best fit the model for sheep aged ≤1; HG, LG, BL and HDW for 2 year-old sheep; HG, BL, and HL best fit the model for sheep 3 years age group; LHQ best fit the model for sheep of 4 years of age; while HL best fits sheep that were in 5 year age category. Coefficients of determination (R2) values for linear and allometric models for predicting the live weight of WAD sheep increased with age in all the body measurements (HW, HG, BL, HL, LHQ, WHQ, HDW and LG). Sex had significant influence on the model with R2 values consistently higher in females except the models for LHQ, WHQ, LG and BL were they the same with the males. Based on R2 values, it was concluded that both linear and allometric regression models could be used to predict live weight from body measurements of WAD sheep.   

scholarly journals Effect of age, sex and local government area on linear body measurements of WAD goat in Ogun State, Nigeria

2020 ◽  
Vol 40 (2) ◽  
pp. 143-150
Author(s):  
F. A. Aluko ◽  
O. E. Daramola ◽  
B. B. A. Taiwo
Keyword(s):  
Local Government ◽  
Body Length ◽  
Live Weight ◽  
West African ◽  
The Body ◽  
Limb Length ◽  
Body Measurements ◽  
West African Dwarf ◽  
West African Dwarf Goats ◽  
Dwarf Goats

One hundred and twenty West African Dwarf goats were used in this study. Observations were made from twelve different towns in Yewa North, Yewa South and Abeokuta North Local Government. West African dwarf goats were evaluated for phenotypic variation at different ages ranges from 1, 2 and 3 years. Variations in live weight and body measurements such as height at wither; body length, heart girth, fore limb length, hind limb length, face length, ear length, ear width, hip width and tail length were taken. The local government areas significantly (P<0.05, 0.001) affected body length, fore limb length, ear length, ear width, hip width and live weight. Age and sex significantly (P<0.01) affected all the body measurements. The mean live weight by age groups are 6.61 + 0.31kg, 13.10 + 0.60kg and 20.18 + 0.95kg for ages 1,2 and 3 respectively. The coat colour varied from black, brown, grey to white in WAD goats. Some colours were in patches, some uniform while others were spotted

scholarly journals Suckling behaviour of West African dwarf goat kids

2021 ◽  
Vol 44 (3) ◽  
pp. 378-383
Author(s):  
O. S. Iyasere ◽  
I. J. James ◽  
O. O Akinsanya ◽  
T. J. Williams ◽  
J. O. Daramola
Keyword(s):  
Live Weight ◽  
West African ◽  
Dairy Goat ◽  
Male And Female ◽  
West African Dwarf ◽  
Bout Duration ◽  
West African Dwarf Goat ◽  
Positive Correlations ◽  
Small Holder ◽  
Birth Type

During suckling, goat kids exhibit different kinds of behavior which could be germane to their general performance. The objective of this study was to determine suckling behaviour of West African dwarf (WAD) goat kids with respect to some behavioural measurements. A total number of 21 WAD does comprising of 1st and 2nd parity with live weight range of 9.5kg-16.5kg with a total of 26 kids (12males and 14females) in a small holder dairy goat were used. Data on suckling behaviour (suckling bout, duration of suckling and number of butts during suckling) was monitored to investigate the effect of birth type (singleton and twin) and kid sex (male and female). Behaviours were observed twice/day i.e. in the morning (7:00-8.30 am) and evening (4:30-6:00pm), 2 days/week starting from the 2nd week after kidding for 7 weeks. Suckling bout, duration of suckling and number of butts during suckling was greater in twin than in singleton. Kid sex had no significant effect on all behavioural parameters monitored. However, significant positive correlations were observed between suckling bout and number of butts during suckling, between suckling bouts and duration of suckling and between duration of suckling and number of butts during suckling. In conclusion, suckling behaviours in WAD kids were dependent on the birth type and not sex of the kids.

Carcass Profile of Red Sokoto-West African Dwarf Goat Crosses of Defined Age and Sex

1979 ◽  
Vol 44 (4) ◽  
pp. 318-321
Author(s):  
J. O. Adegbuyi ◽  
J. K. Loosli ◽  
A. O. Okubanjo ◽  
L. O. Ngere
Keyword(s):  
West African ◽  
West African Dwarf ◽  
West African Dwarf Goat ◽  
Age And Sex

scholarly journals Effect of feed quality restriction on changes in body measurements and carcass characteristics of West African dwarf sheep

2021 ◽  
Vol 41 (2) ◽  
pp. 124-138
Author(s):  
B. A. Olayode ◽  
O. S. Sowande ◽  
M. N. Bemiji ◽  
T. O. Bawala ◽  
O. O. Ajagbe` ◽  
...  
Keyword(s):  
Dry Matter ◽  
Carcass Characteristics ◽  
Live Weight ◽  
West African ◽  
Dry Matter Intake ◽  
Control Group ◽  
Body Measurements ◽  
West African Dwarf ◽  
Feed Quality ◽  
Restricted Group

Twenty seven West African Dwarf (WAD) sheep were used for the 120 day feeding trial to determine the effects of feed quality restriction on changes in body measurements and carcass characteristics. The animals were divided into three groups of nine animals each, the control group(C), the restricted group one (R1) and the restricted group two (R2). The sheep in the control group were fed dried guinea grass (Panicum maximum) and concentrate diet for the whole period of the experiment. The R1 and R2 animals were fed dried grass for a period of 30 days and 60 days, respectively before the inclusion of concentrate diet for 60 days. The live weight was measured weekly and body measurements every two weeks. Data obtained were analyzed using one way analysis of variance. Results showed that the average values for chest girth were significantly (P< 0.05) affected by duration of feed quality restriction with R2 group sheep having the highest value of 58.67 ± 1.16 cm and R1 group sheep having the lowest mean value of 53.85 ± 0.65 cm. The average values for testes girth and total dry matter intake were significantly (P< 0.05) affected by duration of feed quality restriction with C group sheep having the highest values 11.33 ± 0.26 cm and 346.80 ± 0.26 g, respectively. The C group sheep also had significantly higher (P< 0.05) values for live weight, withers height, shoulder width, thigh bone weight, dressing percentage and liver weight (12.75 ± 0.73 kg, 55.88 ± 0.00 cm, 19.05 ± 0.42 cm, 0.18 ± 0.03 kg, 60.47 ± 4.76 % and 0.22 ± 0.01 kg, respectively) during realimentation. In conclusion, feed restriction negatively affected live weight, total dry matter intake, chest and testes girth and it was recommended that feed supplementation during periods of feed scarcity be encouraged so as to allow animals maximise their growth and breeding potentials because animals fed grass and concentrate (C group) performed better than those fed grass only for specific periods (R1 and R2 groups).

Estimates Of Genetic Parameters For Economic Traits In West African Dwarf Goat

2021 ◽  
Vol 19 ◽  
pp. 114-119
Author(s):  
I. K. Odubote ◽  
J. O. Akinokun
Keyword(s):  
Body Weight ◽  
Litter Size ◽  
Genetic Parameters ◽  
West African ◽  
Economic Traits ◽  
West African Dwarf ◽  
West African Dwarf Goat ◽  
Heritability Estimates ◽  
Size At Birth ◽  
Birth Body Weight

Records of 848 West African Dwarf goat kids and 220 kiddings over a period of eight years (1982-1989) were analysed. The records were used to provide heritability and repeatability estimates for litter size at birth, kidding interval (repeatability estimate alone) and body weight at birth, weaning, 3 months, 6 months, 9 months and 1 year of age. Heritability estimates of 0.28±0.005, 0.18±0.003, 0.14±0.003, 0.29±0.005, 0.11±0.003 and 0.17±0.004 were obtained for litter size at birth, body weight at birth, and at weaning, 3 months, 6 months, and 9 months of age respectively. Corresponding repeatability estimates were slightly higher than the heritability estimates. However, repeatability estimates of 0.04±0.030 was obtained for kidding interval.

Sign in / Sign up

Export Citation Format

Share Document