Características de reprodução, peso ao nascer e mortalidade de caprinos Anglo-nubianos, no município do Rio de Janeiro I Fatores que afetam o período de gestação, fertilidade e prolificidade*

Medeiros, Luís Fernando Dias; Vieira, Debora Helena; Rodrigues, Victor Cruz; Barbosa, Celso Guimarães; Scherer, Paulo Oldemar

doi:10.4322/rbcv.2014.263

Cited by 3 publications

(7 citation statements)

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“…Several studies have reported variability among dairy goats systems in Brazil. There are distinctions related to technology input, geographic region and use of specialized animals for the same intensive or semi-intensive system (BARROS et al, 2005;GONÇALVES et al, 2002;GONÇALVES et al, 2008;MEDEIROS et al, 2006;QUEIROGA et al, 2007;VIEIRA et al, 2009). Current study registered difference only for milk production (p < 0.01) among the dairy goat systems.…”

Section: Resultsmentioning

confidence: 99%

“…Current analysis reports on Brazilian literature and data on the production and economic weights for intensive and semi-intensive dairy goat system in Brazil (BARROS et al, 2005;GONÇALVES et al, 2008;MEDEIROS et al, 2006;QUEIROGA et al, 2007;VIEIRA et al, 2009). A deterministic and static bio-economic model was used in herd simulation and Microsoft Excel spreadsheets were employed to estimate production and reproduction performances, costs and income.…”

Section: Methodsmentioning

confidence: 99%

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<b>Comparison of selection indexes for dairy goats in the tropics</b> - doi: 10.4025/actascianimsci.v35i3.16049

Lopes

Silva

Miyagi

et al. 2013

Acta Sci. Anim. Sci.

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The selection process in dairy goat was evaluated by selection indexes. Basal population of 1,000 does, randomly mated by 50 unselected and unrelated bucks, was simulated. Eight selection indexes in two production systems (intensive - indexes I-IV and semi-intensive - indexes V-XIII) were compared. Three groups of dairy goats (A, B and C) were simulated with a respective intensity of 10, 25 and 50%. Each group was composed of five generations and each generation was replicated 20 times. All traits were simulated using matrices of direct additive genetic and the residual (co)variance and the effect of Mendelian segregation. Statistical analyses were performed by repeated measurements in time. Selection using the suggested indexes improved all traits. Selection indexes III and VII are suggested due to simultaneous production and reproduction trait improvement. Indexes IV and VIII are recommended when higher rates of total solids and somatic cell count occur and would correspond to differentiated payment for the milk.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

<b>Comparison of selection indexes for dairy goats in the tropics</b> - doi: 10.4025/actascianimsci.v35i3.16049

Lopes

Silva

Miyagi

et al. 2013

Acta Sci. Anim. Sci.

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“…The herd fertility rates were satisfactory (Table 3), with the lowest rate being 76% and the highest 92%, with an average of 85.24% considering the six birth stations, which was higher than 80.4% found by Medeiros et al (2006).…”

Section: Arqmentioning

confidence: 86%

“…For this, it is necessary to adopt strategies to meet the nutritional requirements of animals in the different stages of production. Strategies like implementation of areas with palm trees and grasslands, combined with the preservation of the Caatinga in the sense of promoting a differential in milk derivatives as highlighted by Medeiros et al (2013). In addition, grazing in the Caatinga area represents, as shown by Silva and Medeiros (2003), a substantial supply of feed for dairy goats throughout the year in commercial units in the semi-arid region of Paraíba, therefore, its use would not be restricted only to the dry season of the year.…”

Section: Introductionmentioning

confidence: 99%

Dairy goat production in the semi-arid region: productive and reproductive analysis, and the influence of the adoption of hygienic practices on milk quality

Silva

Moura

Júnior

et al. 2021

Arq. Bras. Med. Vet. Zootec.

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The aim of this study was to evaluate the productive and reproductive performance of dairy goat genotypes, as well as the influence of hygienic practices by farmers on the quality of goat milk. Productive and reproductive data of 81 Anglo Nubian and Alpine crossbred goats, as well as data on total milk production of goats over 100 days of lactation and partial production up to 56 days of lactation. Also, in natura milk samples from 160 properties in the region were evaluated. At the time of collection, a questionnaire was applied to diagnose goat milk production systems. Data from productive and reproductive performance were evaluated by Tukey test and descriptive analysis using the SPSS program. The herd presented a variation of the total milk production in lactation (TMP) from 267.40kg to 468.55kg, with lactation length ranging from 157 to 247 days, and average daily production between 1.43 and 1.89kg/day. Fertility rates were satisfactory, with the lowest rate being 76% and the highest 92%, with an average of 85.24% considering the six seasons of birth. The means of the gestation periods varied between 144 and 152 days. Regarding the sanitary characterization, 73% of farmers performed a cleaning of the room before and after milking. However, 94.8% of farmers did not eliminate the first jets of milk and only 29.2% used the screened mug test to identify clinical mastitis. Only 41% of farmers performed pre and post-dipping and 30.2% applied the iodine solution. Only 8.3% of farmers used disposable paper towels. However, 92% of producers still used fabric towel. It was also observed that 99% of the properties stored milk in buckets or cans without refrigeration. In the microbiological analysis, a small amount of milk samples (5.6%) was contaminated with Staphylococcus aureus, however the total coliform count was high. Regarding the somatic cell count, it was found that 86% of the properties presented values above one million cells per mL of sample. The study demonstrated the prevalence of several factors that contribute to the vulnerability of milk contamination in various stages of production such as milking and processing. Thus, the guidance and awareness of those responsible is extremely important to improve goat milk quality in the semi-arid region of Paraíba.

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“…Fertility and prolificacy are the most important reproductive characteristics for goat-milk production systems (MEDEIROS et al, 2006). Good reproductive indices result in high number of kids born per year, enabling higher selection intensity, and consequently improving production, regardless of the breeding purpose.…”

Section: Introductionmentioning

confidence: 99%

Effect of concentrate supplementation during pre-kidding on the productive and reproductive performance of goats raised on Guinea grass (Panicum maximum cv. Tobiatã) pasture

Marques

Gonçalves

Meirelles

et al. 2016

SCA

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Sixty goats (20 Alpine, 18 Anglo-Nubian, and 22 crossbred Boer), with average body weight 49.33 ± 1.41 kg, were raised on Panicum maximum cv. Tobiatã pasture with two different levels of concentrate supplementation, 300 (SL30) and 600 g kg -1 (SL60) of the daily requirements, and evaluated from the pre-mating season until an average of 110 days of lactation. Milk controls were performed every 14 days. The following milk production curve parameters were estimated: time to reach peak milk production (TP), peak milk production (PP) and milk production during the first 110 days of lactation (MP). The following milk components were determined: fat, protein, lactose, total solids (TS), defatted dry extract (DDE), urea nitrogen (UN) concentrations, and somatic cell count (SCC). Goat prolificacy and birth weight of the kids were also determined. Breed affected the lactation curve, with Alpine and AngloNubian goats presenting higher TP, PP, and MP. Protein, TS, and DDE concentrations were also affected by breed, being higher for crossbred Boer goats. Milk fat, lactose concentrations, and the log of SCC were affected by the concentrate supplementation level, being higher for SL30, as well as by the breed, with crossbred Boer goats presenting higher fat concentrations and log of SCC, and crossbred Boer and Alpine goats presenting higher lactose concentrations. UN was affected by the stage of lactation. Prolificacy and birth weight were affected by breed and concentrate supplementation level, being higher for Anglo-Nubian and crossbred Boer goats with SL60. Kids from single births presented higher birth weights. The Anglo-Nubian breed presented good milk production and the best body condition, which might indicate the effectiveness of this production system, SL60 supplementation resulted in higher birth weight and prolificacy. Key words: Goats. Milk composition. Birth weight. Milk production. Prolificacy. ResumoForam utilizadas 60 cabras (20 Alpina, 18 Anglo-Nubiana e 22 mestiças Boer), com peso corporal médio de 49,33±1,41kg, mantidas em pastagem com Panicum maximum cv. Tobiatã e suplementadas com dois níveis de concentrado: 300 (NS30) e 600 g kg -1 (NS60) das exigências diárias, avaliadas desde a pré-estação de monta, até, em média 110 dias de lactação. O controle leiteiro foi realizado a cada 14 dias, estimando-se as características da curva de produção: tempo para atingir o pico (TP), produção no pico (PP) e produção de leite até 110 dias de lactação (PL); os constituintes: gordura, proteína, lactose, sólidos totais (ST), extrato seco desengordurado (ESD), nitrogênio ureico (NU) e contagem de células somáticas (CCS); além da prolificidade das cabras e o peso ao nascer dos cabritos. O grupo racial influenciou a curva de lactação, sendo que as Alpinas e Anglo-Nubianas apresentaram maior TP, PP e PL. Os teores de proteína, ST e ESD foram influenciados pelo grupo racial, tendo as mestiças Boer apresentado maiores teores. Os teores de gordura, lactose e o log da CCS foram influenciados pelo tratamento, sendo o NS30 ...

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Características de reprodução, peso ao nascer e mortalidade de caprinos Anglo-nubianos, no município do Rio de Janeiro I Fatores que afetam o período de gestação, fertilidade e prolificidade*

Cited by 3 publications

References 0 publications

<b>Comparison of selection indexes for dairy goats in the tropics</b> - doi: 10.4025/actascianimsci.v35i3.16049

<b>Comparison of selection indexes for dairy goats in the tropics</b> - doi: 10.4025/actascianimsci.v35i3.16049

Dairy goat production in the semi-arid region: productive and reproductive analysis, and the influence of the adoption of hygienic practices on milk quality

Effect of concentrate supplementation during pre-kidding on the productive and reproductive performance of goats raised on Guinea grass (Panicum maximum cv. Tobiatã) pasture

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