Crecimiento de corderos de pelo en el altiplano semiárido de Zacatecas durante el invierno

López-Carlos, Marco Antonio; Fernández-Mier, Ricardo; Aréchiga-Flores, Carlos Fernando; Hernández-Briano, Pedro; Medina-Flores, Carlos Aurelio; Ramírez-Chéquer, Juan

doi:10.21929/abavet2021.4

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…The BW obtained in Katahdin lambs matches the figures reported by Ehrhardt et al (2018) and Vicente-Pérez et al (2021): 3.7 and 3.9 kg, respectively. Although the BW values reported in this study were obtained using pure breeds, these results match the findings of López et al (2021), who found a similar BW (3.8 kg), when Dorper or Katahdin parental breeds are used. Likewise, Macías et al (2010) have reported that crosses of these paternal breeds with the maternal Pelibuey breed have the advantage of producing offspring for supply with acceptable growth rates.…”

Section: Resultssupporting

confidence: 88%

Reproductive and productive behavior of hair sheep under an intensive production system

Limas-Martínez,

Hernández-Meléndez,

Velázquez-Morales

et al. 2024

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Objective: To evaluate the reproductive and productive behavior of four hair sheep breeds in an intensive production system. Design/Methodology/Approach: Data recorded over 4 years (2016-2019) from a production unit that works with Blackbelly, Pelibuey, Dorper, and Katahdin breeds were analyzed. The following variables were evaluated: fertility, prolificacy, birth weight (BW), weaning weight (WW), weaned lamb yield (WLY), daily weight gain during lactation (DWGL), offspring born alive (OBA), male offspring (MO), and female offspring (FO). All information was analyzed using Chi-square tests and analysis of variance. Results: The fertility, BW, WW, and WYL variables recorded different values between breeds (P<0.05). The greatest fertility and prolificacy were recorded by Blackbelly, while Dorper recorded the lowest values (P<0.05). BW and WW were highest in Dorper and lowest in Blackbelly (P<0.05). Finally, the sheep that recorded the highest WYL were the Blackbelly, while the Dorper registered the lowest values (P<0.05). BW and DWGL values reached maximum values (P<0.05) in Dorper rams, followed by Katahdin. The greatest number of OBA was observed in Blackbelly and Pelibuey (P<0.05). Study Limitations/Implications: Further studies should be carried out to validate this research. Findings/Conclusions: Blackbelly ewes produced more kilograms of weaned lambs per lambing ewe. The Dorper and Katahdin rams in the pre-weaning period recorded higher weight at weaning.

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Section: Resultssupporting

confidence: 88%

Reproductive and productive behavior of hair sheep under an intensive production system

Limas-Martínez,

Hernández-Meléndez,

Velázquez-Morales

et al. 2024

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“…Commonly, differences are reported in weight and growth of males and females. In some studies, female and male sheep show differences in weight at weaning, at one year, at maturity, and in the rate of growth (González-Garduño et al, 2002;Hinojosa-Cuellar et al, 2018;López-Carlos et al, 2021). Therefore, differences in the growth curves of both sexes are expected, as appreciated in Figures 1 and 2; as well as in the parameters estimated in the present study, as described by the five nonlinear models (Tables 4 and 5).…”

Section: Discussionmentioning

confidence: 99%

Growth Curves Through Non-Linear Models in Creole Lambs From the Mixteca Region of Oaxaca, Mexico

Avalos-Castro

Segura-Correa

Palacios-Espinosa³

et al. 2022

Trop Subtrop Agroecosyst

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Background. Growth curves allow to predict the mature weight, the grow rate unto maturity, as well as the age and weight at inflexion point, to improve management on productive animals. Objective. To identify the best non-linear model (NLM), which best describe the growth curve of Creole sheep from the Mixteca region of Oaxaca, Mexico. Material and methods. The live weights of 720 sheep (438 females and 239 males) between 1 and 60 months of age were used. The NLM evaluated were: Logistic, Gompertz, Michaelis-Menten, Weibull and Mechanist. Analyzes were performed with SAS JMP software. The criteria used to select the best model were the corrected Akaike information criterion (AICc), Bayesian (BIC) and coefficient of determination (R2). Results. For females, the Mechanist and Weibull models adjusted better de data (lowest AICc, BIC), but not being differences with the Michaelis-Menten and Gompertz. For males the lowest AICc, BIC and the highest R2 (0.84) values were for the Logistic, Gompertz and Mechanist models. Implications. The knowledge of the parameters of the growth curves of the creole sheep of the Mixteca region could be used for taking better decisions on the management of this type of sheep. Conclusion. According to the models, the inflection point of the growth curves was reached at a young age and a lower body weight in females than in males; therefore, different models should be used to study the growth kinetics between sexes.

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Crecimiento de corderos de pelo en el altiplano semiárido de Zacatecas durante el invierno

Abstract: Crecimiento de corderos de pelo en el altiplano semiárido de Zacatecas durante el invierno

Cited by 2 publications

References 18 publications

Reproductive and productive behavior of hair sheep under an intensive production system

Reproductive and productive behavior of hair sheep under an intensive production system

Growth Curves Through Non-Linear Models in Creole Lambs From the Mixteca Region of Oaxaca, Mexico

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