Sexual maturity and fertility-related measures in young Nellore bulls receiving long-term dietary supplementation with rumen-protected polyunsaturated fatty acids

Rossi, Guilherme Fazan; Dias, E. A. R.; Bastos, Natália Marins; Vrisman, Dayane Priscila; Rodrigues, Naiara Nantes; Vantini, Roberta; Garcia, Joaquim Mansano; Simili, Flávia Fernanda; Ribeiro, Enílson Geraldo; Canesin, Roberta Carrilho; Mercadante, Maria Eugênia Zerlotti; Freitas-Dell’Aqua, C.P.; Monteiro, Fábio Morato; Mingoti, Gisele Zoccal

doi:10.1016/j.theriogenology.2019.07.021

Cited by 5 publications

(9 citation statements)

References 62 publications

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“…Animals were divided into two paddocks of 6 hectares (ha) with an initial stocking rate of 1.7 animal unit (AU)/ha (2.0 animals/ha), in a continuous stocking system at a fixed stocking rate. The volume of fecal excretion and indigestible neutral detergent fiber were evaluated using chromium oxide (Cr 2 O 3 ) to estimate the feed intake of the animals, as described by Rossi et al (2019) and following previously reported methods (Smith and Reid, 1955;Kimura and Miller, 1957;Detmann et al, 2001;Van Soest et al, 1991;Mertens, 2002;Detmann et al, 2012;Casali et al, 2008;Casali et al, 2009;Valente et al, 2011).…”

Section: Management Of Animals On Pasturementioning

confidence: 99%

“…Backfat thickness, rib eye area and rump fat thickness were measured in bulls with the aid of an Aquila Vet real-time ultrasound scanner (Esaote Pie Medical, Pie Medical Equipment B.V., Maastricht, The Netherlands) equipped with a 170-mm long, 3.5-MHz linear transducer. Measurements were performed at 14.3 ± 0.09, 20.9 ± 0.09 and 24.6 ± 0.09 months of age, according to Herring et al (1994) and following the steps described Rossi et al (2019). The ultrasound scans were analyzed using the Echo Image Viewer 1.0 program (Pie Medical Equipment B.V. 1996).…”

Section: Ultrasound Carcass Evaluationmentioning

confidence: 99%

“…The presence and type of blood flow was assessed in the testicles with Color-flow Doppler and the following parameters were evaluated: diastolic velocity (EDV), peak systolic velocity (PSV), resistive index [RI = (PSV -EDV)/PSV], and pulsatility index [PUI = (PSV -EDV)/mean velocity between PVS and EDV]. All analyses were performed as previously described (Rossi et al, 2019).…”

Section: Testicular Ultrasonogram and Pulsed-wave Doppler Ultrasound ...mentioning

confidence: 99%

“…The frozen/thawed semen samples were also analyzed by the CASA technique after submitting the samples to the rapid thermoresistance test (RTT) at 46 o C for 30 min (Barnabé et al, 1980;Vianna et al, 2009). The semen samples were analyzed in an IVOS analyzer (version 14.0, Hamilton Thorne Biosciences, Beverly, USA) as described by Campanholi et al (2017) and the CASA setup was preadjusted as described by Rossi et al (2019).…”

Section: Computer-assisted Sperm Analysis (Casa)mentioning

confidence: 99%

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Growth performance, reproductive parameters and fertility measures in young Nellore bulls with divergent feed efficiency

et al. 2022

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The growth, sexual maturity and fertility-related parameters related of young Nellore bulls with divergent residual feed intake (RFI) raised on pasture were evaluated. After classification of 48 young males as low and high RFI (more and less efficient, respectively), the animals were evaluated for growth and reproductive parameters at 28-day intervals from 14.3 to 24.6 months of age. The semen was cryopreserved in the last sampling and fresh and post-thaw semen samples were evaluated. Low RFI bulls exhibited higher initial and final body weight (P < 0.05), but feed intake, body condition score and growth measures evaluated by carcass ultrasound were unaffected by RFI (P > 0.05). The scrotal circumference, sperm concentration, defects, and quality of fresh semen, and ultrasonographic testicular characteristics were unaffected by RFI (P > 0.05). However, velocity parameters such as average path and curvilinear velocities determined by computer-assisted sperm analysis of thawed semen submitted to the rapid thermoresistance test were improved (P < 0.05) in low RFI bulls, but this improvement in quality did not enhance in vitro sperm fertilizing ability. Our results demonstrated significant differences in metabolism and growth performance between bulls of divergent RFI. In addition, there was slight improvement in the semen quality of bulls with low RFI bulls, but this did not enhance in vitro fertilizing ability. Selection of beef bulls for RFI can be performed, which will result in economic benefits by improving the growth performance of the animals without affecting reproductive parameters.

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Section: Management Of Animals On Pasturementioning

confidence: 99%

Section: Ultrasound Carcass Evaluationmentioning

confidence: 99%

Section: Testicular Ultrasonogram and Pulsed-wave Doppler Ultrasound ...mentioning

confidence: 99%

Section: Computer-assisted Sperm Analysis (Casa)mentioning

confidence: 99%

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Growth performance, reproductive parameters and fertility measures in young Nellore bulls with divergent feed efficiency

et al. 2022

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“…Fish oil increases testosterone levels in some animals [85][86][87]. Rossi et al reported that unsaturated fatty acids increased testosterone in bulls [88]. Omega-3 fatty acids also increase testosterone levels in various animals [89,90].…”

Section: Fish Oil(dha/epa)omega-3 and Omega-6 Polyunsaturated Fatty Acidmentioning

confidence: 99%

A Review of foods and food supplements increasing testosterone levels

Kataoka¹,

Hotta²,

Kimura³

2021

JOMH

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Androgens are essential for male physical activity. Age-related androgen deﬁciency, known as late-onset hypogonadism (LOH), is considered a risk factor for several diseases. There are many men's health supplements on the market. Therefore, the purpose of this review is to summarize the food ingredients that have been suggested in published literature to increase testosterone levels. A review of previously reported animal studies suggested that 5 representative nutritional components, 7 food ingredients, and 25 supplements were associated with testosterone. Some food and supplements inﬂuence testosterone levels in various animals by directly increasing testosterone or suppressing the decrease in testosterone production due to testicular toxicity. There are three mechanisms by which foods or supplements increase testosterone production: 1) regulating luteinizing hormone, the hormone that stimulates testosterone production, 2) regulating testosterone synthase in the testis, and 3) regulating testosterone-degrading enzymes. In contrast, suppressing the decrease in testosterone depends on the antioxidant effect of the foods. Although detailed mechanistic studies and clinical trials are required to validate these ﬁndings, the use of food to regulate testosterone levels is a promising therapeutic option.

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