Breeding soundness examination and herd proficiency of local genetic groups of bulls in tropical environment conditions in Veracruz, Mexico

Torres-Aburto, Víctor Fernando; Barrientos-Morales, Manuel; Hernández-Flores, Herminio; Rodríguez-Andrade, Araceli; Cervantes-Acosta, Patricia; Landi, Vincenzo; Beltran, Antonio Hernández; Domínguez-Mancera, Belisario

doi:10.1080/1828051x.2020.1803773

Cited by 3 publications

(3 citation statements)

References 46 publications

(54 reference statements)

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“…High values of temperature and humidity are observed in the rainy season, and with increased rainfall there is biomass available for bulls in extensive systems (Casagrande et al 2018). The semen variables of Charolais and Charbray bulls analyzed under these environmental conditions show values similar to those reported by other researchers (Torres-Aburto et al, 2020a), without marked seasonal modifications; thus showing that the Charolais breed and its crosses have adapted to the climate of the area. Dance et al (2015) and Bourgon et al (2018) describe a positive relationship between the quality of the pasture produced at different times of the year and the sperm concentration; in this sense, the breeds analyzed are similar between seasons, where differences in the quantity and quality of biomass available for grazing are marked (Cruz-Hernández et al, 2017).…”

Section: Multivariate Analysis Of the Bse Of Charolais And Charbray Bulls On Herd Reproductive Efficiencysupporting

confidence: 78%

Reproductive evaluation of Charolais and Charbray bulls on the reproductive efficiency of herds in warm subhumid climate of Veracruz

Torres-Aburto

Hernández-Beltrán

Cervantes-Acosta

et al. 2021

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Objective: To correlate the Breeding Soundness Evaluation (BSE) of Charolais andCharbray bulls in the warm subhumid climate and its effect on the Pregnancy rate andCalving interval of herds to estimate differences between breeds.Design/methodology/approach: BSE was carried out on N = 90 Bulls; Charolais (n =33) and Charbray (n = 57), evaluated in situ during the period 2017 to 2019. Bull (age, body condition, libido, and scrotal circumference), Semen (concentration, motility, and volume), Herd (Pregnancy rate and Calving interval) and environment variables (Rainy and Dry season) were analyzed with the one-way ANOVA, Factorial, Multiple regression, and Multivariate analysis.Results: Charolais and Charbray bulls show similar results in the BSE (p>0.05) in awarm subhumid climate.Limitations/implications: Year season (Rainy or Dry) do not affect (p<0.05) the BSErating. Libido is associated (p<0.05) with age (R=-0.42), sperm motility (R=0.67), spermconcentration (R=0.66) and pregnancy rate (R=0.63). Findings/conclusions: Variables with high association (p<0.05) with pregnancy ratewere libido (R=0.63), motility (R=0.60), sperm concentration (R=0.51) and age (R=-0.50); variables with high association (p<0.05) with calving interval were: age (R=0.74)and libido (R=-0.33). Charolais and Charbray bulls show similar reproductive efficiencyin herds under a warm subhumid climate in Veracruz.

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Section: Multivariate Analysis Of the Bse Of Charolais And Charbray Bulls On Herd Reproductive Efficiencysupporting

confidence: 78%

Reproductive evaluation of Charolais and Charbray bulls on the reproductive efficiency of herds in warm subhumid climate of Veracruz

Torres-Aburto

Hernández-Beltrán

Cervantes-Acosta

et al. 2021

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“…The Bos indicus breeds, like Brahman, are the breeds most used in the tropics, and they are adapted to tropical environments [5,6], showing high resistance to high heat stress index and parasites, better feed efficiency on high roughage diets, and efficient thermal exchange [7]. The reproductive performance of Zebu bulls in the harsh conditions of the tropics is considered good compared to European breeds [8]; due to their capacity for thermoregulation, internal temperature requirements can be maintained, to a certain extent, at normal levels for spermatogenesis [9]. In this region, beef cattle production is based on extensive grazing systems and reproduction is mainly based on natural mating with the presence of a single or multiple bulls [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it has to be borne in mind that the selection made in Zebu breeds by the breeding soundness evaluation methodology has not been consistent in comparison to European breeds, and the measured parameters are not sufficient to really be able to diagnose the potential fertility of the sire [50]. Therefore, semen analysis becomes more relevant regardless of the reproduction program used on the farm, whether it is artificial insemination (AI) or natural or controlled mating [8]. In consequence, the aim of the present study was to determine the effect of the mating period on Brahman bull sperm parameters such as motility, kinematics, morphology, and morphometrics using a commercial CASA system.…”

Section: Introductionmentioning

confidence: 99%

Kinematic and Morphometric Assessment of Fresh Semen, before, during and after Mating Period in Brahman Bulls

Araya-Zúñiga,

Sevilla,

Molina-Montero

et al. 2023

Animals

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The objective of the present study was to determine the effects that the reproductive season has on the motility, kinematics, morphology, and sperm morphometry of Brahman bulls evaluated with a commercial CASA system. The experiment was carried out at the Costa Rica Institute of Technology from March to August 2021. A total of eight Brahman bulls were used. A total of 28 ejaculates were collected in the pre-mating period (PMP), during it (DMP), and after it (AMP) using an electroejaculator. The sperm concentration was measured with the Accuread photometer. The motility was measured using a Spermtrack® counting chamber. The analyses were performed with the CASA-Mot ISAS®v1 system. The morphology was analyzed using a microscope with a negative phase contrast objective. Morphometry was evaluated with the CASA-Morph. The sperm concentration did not present differences between the PMP and AMP; however, it was significantly higher than DMP (p > 0.05). Regarding the progressiveness variables, linearity on forward progression (LIN), straightness (STR), and wobble (WOB) were higher (p < 0.05) DMP. A kinematic principal component analysis grouped all the variables into three factors and an effect on the reproductive period was found (p < 0.05) in the parameters of the head and middle part of the sperm, such as width and perimeter, which were greater in the PMP. The length of the sperm head in the PMP and DMP did not show differences; however, both were larger (p < 0.05) than AMP. The insertion distance of the middle piece of the sperm was significantly greater than DMP. Finally, the PMP contained cells with a larger insertion angle (p < 0.05) than AMP. These findings are important to understand the implications of reproductive status on sperm quality and to consider them in andrological evaluations.

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Bull Breeding Soundness Assessment Using Artificial Neural Network-Based Predictive Models

Marín-Urías,

García-Ramírez,

Domínguez-Mancera

et al. 2023

Agriculture

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For years, efforts have been devoted to establishing an effective bull breeding soundness evaluation procedure; usual research on this subject is based on bull breeding soundness examination (BBSE) methodologies, which have significant limitations in terms of their evaluation procedure, such as their high cost, time consumption, and administrative difficulty, as well as a lack of diagnostic laboratories equipped to handle the more difficult cases. This research focused on the creation of a prediction model to supplement and/or improve the BBSE approach through the study of two algorithms, namely, clustering and artificial neural networks (ANNs), to find the optimum machine learning (ML) approach for our application, with an emphasis on data categorization accuracy. This tool was designed to assist veterinary medicine and farmers in identifying key factors and increasing certainty in their decision-making during the selection of bulls for breeding purposes, providing data from a limited number of factors generated from a deep pairing study of bulls. Zebu, European, and crossbred bulls were the general groupings. The data utilized in the model’s creation (N = 359) considered five variables that influence improvement decisions. This approach enhanced decision-making by 12% compared to traditional breeding bull management. ANN obtained an accuracy of 90%, with precision rates of 97% for satisfactory, 92% for unsatisfactory, and 85% for bad. These results indicate that the proposed method can be considered an effective alternative for innovative decision-making in traditional BBSE.

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Breeding soundness examination and herd proficiency of local genetic groups of bulls in tropical environment conditions in Veracruz, Mexico

Cited by 3 publications

References 46 publications

Reproductive evaluation of Charolais and Charbray bulls on the reproductive efficiency of herds in warm subhumid climate of Veracruz

Reproductive evaluation of Charolais and Charbray bulls on the reproductive efficiency of herds in warm subhumid climate of Veracruz

Kinematic and Morphometric Assessment of Fresh Semen, before, during and after Mating Period in Brahman Bulls

Bull Breeding Soundness Assessment Using Artificial Neural Network-Based Predictive Models

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