Effect of Genotype, Sex and Age on Plumage Maturity, and Body Weight of Guinea Fowl (Numida Meleagris)

Mróz, Emilia; Tomaszewska, Katarzyna; Michalik, Danuta; Makowski, Włodzimierz; Stępińska, Monika; Kubińska, Magdalena

doi:10.1515/aoas-2015-0060

Cited by 4 publications

(5 citation statements)

References 21 publications

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“…The DPFG hens had higher body weight than the DPFG cocks. This has agrees with [13] who reported that guinea hens were superior in average body weight (2.043 Kg) over guinea cocks (1.927 Kg) and [18] who reported 2165 ± 91.9 and 2279 ± 74.7 (g) for male and female French guineas. The higher body weight of guinea fowl hens over cocks could be due to genetic improvement, weights of the female reproductive organs which are not found in guinea cocks.…”

Section: Resultssupporting

confidence: 89%

Evaluation of Loss in Vigour of the Dual Purpose French Guinea Fowl and Their Mixed Genetic Grade in Katsina, Nigeria

Elkana¹,

Gwaza²

2019

ujar

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The effect of genetic grade (strain) on body weight and body linear measurements of the pure grade dual purpose French guinea fowl strain (116 birds) and their mixed genetic grade (32 birds) was determined using a linear mathematical model. Birds were raised under intensive system in Katsina state. Loss in vigour of the pure grade dual purpose French guinea fowl was calculated by difference. There was a significant (P < 0.05) effect of strain (genetic grade) on body weight and body linear measurements. The pure grade dual purpose French guinea fowl cocks and hens had significantly higher body weight and most body linear measurements than counterpart dual purpose mixed genetic grade guinea fowl cocks and hens. The pure grade dual purpose French guinea fowl cocks and hens had lower coefficients of variation (7.76 and 9.60 %) than the dual purpose guinea fowl cocks and hen mixed genetic grades (13.11 and 13.54 %). The dual purpose mixed genetic grade guinea fowl cocks and hens had longer helmet length than counterpart pure grade dual purpose French guinea cocks and hens. Strain (genetic grade) had no effect on tail length of guinea hens. There were high loss of vigour (56.25 and 57.69 %) of helmet thickness followed by (28.82 and 37.38 %) for body weight of the dual purpose French guinea fowl cocks and hens. Body length (3.76 and 0.56 %) and thigh length (4.22 and 1.85 %) respectively for guinea fowl cocks and hens, were the morphometric traits that had the lowest reduction in vigour among all quantitative traits evaluated. The dual purpose French guinea fowl and their mixed genetic grade had higher body weight than counterpart local guinea fowl strains. Introduction of the dual purpose French guinea fowl into the tropics can aid the diversification of rural poultry production.

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Section: Resultssupporting

confidence: 89%

Evaluation of Loss in Vigour of the Dual Purpose French Guinea Fowl and Their Mixed Genetic Grade in Katsina, Nigeria

Elkana¹,

Gwaza²

2019

ujar

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“…The rate of feather growth was slower on the thigh and faster in the interscapular region. A higher number of feathers in the interscapular region, compared with the thigh, was also noted in previous studies regarding Galliformes [ 24 , 35 ]. The proportion of mature feathers was higher in the interscapular region where molting most likely began at around 4 weeks of age.…”

Section: Discussionsupporting

confidence: 81%

“…The thigh and dorsal feathers of guinea-fowl had coherent and loose vanes, afterfeathers, and empty spaces between barbs of similar lengths, also at 12 weeks of age. The additional morphological structures develop faster in chickens and guinea-fowl than in turkeys [ 35 , 38 ]. Somatic development takes longer in turkeys than in chickens and guinea-fowl, which leads to differences in feather structure [ 37 ].…”

Section: Discussionmentioning

confidence: 99%

“…In order to evaluate feather growth, samples of feathers were collected from the outer side of one thigh and from an area of 4 cm 2 in the interscapular region, 2 cm 2 on both sides of the spine. These two regions were analyzed because they are characterized by a different rate of feathering, which is fast in the interscapular region and slow in the thigh region [ 24 , 35 ]. A total of 192 feather-pooled samples (32 samples from each treatment) were collected.…”

Section: Methodsmentioning

confidence: 99%

“…In each sample, the longest and the shortest mature feathers were measured to determine their average length. The feathers were then dried for 72 h at room temperature, and classified into five growth stages: I—pinfeathers covered in sheaths, II—beginning of vane development, III—feathers unsheathed by ½ of rachis length, IV—feathers unsheathed by ¾ of rachis length, and V—mature feathers, according to the previously presented methods [ 24 , 35 ]. The pattern of thigh and interscapular feathers representing different growth stages in a 4- and 16-week-old female turkeys is presented in Section 3.1 .…”

Section: Methodsmentioning

confidence: 99%

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Plumage Response of Young Turkeys to Diets with Increased Methionine to Lysine Ratios at Three Dietary Arginine Levels

Mróz¹,

Jankowski²,

Skowroński³

et al. 2022

Animals

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A 2 × 3 factorial experiment was conducted to evaluate the effects of two dietary methionine levels (Met; 30% and 45% of Lys content) and three arginine levels (Arg; 90%, 100%, and 110% of Lys content) on plumage development in 4- and 16-week-old female turkeys. One-day-old turkey poults were assigned to six groups (eight replicate pens per group and 18 birds per pen) and fed experimental diets containing 1.6%, 1.5%, 1.3%, and 1.0% of Lys in four successive four-week periods. After weeks 4 and 16 of feeding, eight turkeys per group were selected for plumage evaluation. Feathers were collected from the outer side of one thigh and from an area of 4 cm2 in the interscapular region. Plumage was evaluated based on an established pattern of five feather development stages in turkeys, from stage I (pinfeathers covered in sheaths) to stage V (mature feathers). An increase in the Met inclusion rate to 45% of Lys content had no significant effect on feather growth in 4-week-old turkeys, but it accelerated the development of feathers in 16-week-old birds. A lower percentage of stage II (p = 0.035), stage III (p = 0.019), and stage IV (p = 0.003) immature feathers, and a higher percentage of stage V (mature) feathers (p = 0.001) were observed. Methionine exerted a greater effect on the development of thigh feathers (p = 0.001) than interscapular feathers (p = 0.074). Unlike Met, different Arg concentrations had no influence on plumage development in turkeys. Overall, the present results indicate that supplemental Met has a potential for accelerating feather development in 16-week-old turkeys via an increased supply of total sulfur amino acids.

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Comparative morphometry of the brainstem of the male and female Helmeted Guinea Fowl (Numida meleagris)

Adam¹,

Onyeanusi²,

Hambolu³

et al. 2018

Agricultura Tropica Et Subtropica

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The aim of this study was to obtain base-line morphometric data on the whole brain and brainstem in the adult male and female helmeted guinea fowl (Numida meleagris), and compare the result in the two sexes. Brain samples of seventy adult helmeted guinea fowls, comprising 35 males and 35 females, intended for slaughter, were extracted for the study. The body weights for both male and female helmeted guinea fowls were 1247 ± 5.51 g and 1230 ± 4.85 g, respectively. The mean brain weights were 3.39 ± 0.02 g and 3.47 ± 0.18 g for male and female, respectively, and the difference in the values was not significant (P > 0.05). The lengths of the brain and medulla oblongata, as well as the lengths of the midbrain and mesencephalic tectum, did not differ between the two sexes. Neither the mean weights nor lengths of the pons differed between the two sexes. In conclusion, the results of this study showed that there was no sex dimorphism observed in the morphometry of the midbrain, medulla oblongata and pons in the helmeted guinea fowl.

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Effect of Genotype, Sex and Age on Plumage Maturity, and Body Weight of Guinea Fowl (Numida Meleagris)

Cited by 4 publications

References 21 publications

Evaluation of Loss in Vigour of the Dual Purpose French Guinea Fowl and Their Mixed Genetic Grade in Katsina, Nigeria

Evaluation of Loss in Vigour of the Dual Purpose French Guinea Fowl and Their Mixed Genetic Grade in Katsina, Nigeria

Plumage Response of Young Turkeys to Diets with Increased Methionine to Lysine Ratios at Three Dietary Arginine Levels

Comparative morphometry of the brainstem of the male and female Helmeted Guinea Fowl (Numida meleagris)

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