Sheep breeding displays high potential, but, in order to maximize productivity, the exploitation of the entire genetic potential of these animals, combined with diets tailored to meet their nutritional requirements, is required. Knowledge on sheep ingestive behavior is important for diet evaluations, which allows for adjustments regarding dietary management, in order to obtain superior productive performance. In this context, the aim of the present study was to evaluate the interference of two distinct environments in the behavioral responses of Santa Inês and Dorper sheep breeding activities during the dry period at the Paraíba Cariri region. The study was carried out in the municipality of Caturité, Paraíba, with 20 male sheep, 10 Santa Inês breeds and 10 Dorper breeds. The animals were subdivided into four lots, containing five animals each, and placed in two different environments, in the sun and in the shade. Feeding behavior was determined by quantifying parameters for 10 hours/day, at 5 min intervals. A completely randomized design (CRD) in a 2 x 2 factorial scheme was applied, of two breeds and two environments, with three replicates. The data were analyzed by SAS, applying the chi-square test. The main daily sheep activities comprised alternate periods of feeding, rumination and idleness, and behavioral activities were exhibited the worse results in the sun environment.
The objective of this study was to evaluate the influence of four water salinity levels on productive performance, physiological and behavioral responses of confined sheep. Thus, 24 crossbred sheep, ½ Dorper x ½ Santa Inês were evaluated while receiving ration and water ad libitum. The experimental design was completely randomized, composed of four treatments (1.5; 3.0; 6.0 and 9.0 dSm-1) and six replicates. The water supply with salinity of up to 9.0 dSm-1 did not affect (P > 0.05) the physiological indexes, performance, or ingestive behavior of the animals, which were able to maintain normal physiological conditions even at times when the thermal comfort indexes were above the ideal. For voluntary water consumption, it was observed that there was a significant difference between treatments (P < 0.05), where animals consuming water with a conductivity of 1.5; 3.0 dSm-1 had lower consumption than those who received six dSm-1. The supply of water with a salinity of up to 9.0 dSm-1 did not affect the performance or the ingestive behavior of the animals, so waters with this salinity can be a valid alternative for crossbred sheep in the semi-arid region, as long as it is used seasonally and strategically.
VARIÁVEIS FISIOLÓGICAS, PRODUÇÃO E QUALIDADE DO LEITE DE CABRAS PARDA ALPINA NO PERÍODO SECO DO SEMIÁRIDO JACIARA RIBEIRO MIRANDA1; DERMEVAL ARAÚJO FURTADO2; JOSÉ PINHEIRO LOPES NETO3; JOSÉ WALLACE BARBOSA4; JOAQUIM REGIS MALHEIROS FILHO5 Engenharia Agrícola, Universidade Federal de Campina Grande, Rua Aprígio Veloso, 882 - Universitário, 58429-900, Campina Grande, Paraíba, Brasil,1jaciara-miranda@hotmail.com; 2araujodermeval@gmail.com; 3lopesneto@gmail.com; 4wallacebosa@hotmail.com; 5malheirosfilho@yahoo.com.br. RESUMO: O objetivo do trabalho foi avaliar o efeito do ambiente sobre as variáveis fisiológicas, desempenho produtivo e qualidade do leite de cabras de três grupos genéticos, Parda Alpinas, ¾ Parda Alpina + ¼ SRD e ½ Parda Alpina + ½ SRD, no período seco no semiárido paraibano. O delineamento estatístico utilizado foi o inteiramente casualizado, com 3 tratamentos e 9 repetições, sendo os dados submetidos à análise de variância e as médias comparadas pelo o teste de Tukey a 5 %. Conclui-se que nas condições do ambiente estudado, as cabras Parda Alpina, das composições genéticas ½, ¾ e pura, conseguiram manter a homeotermia, utilizando de forma semelhante o aumento da frequência respiratória nas horas mais quentes do dia. A composição ¾ Parda Alpina apresentou maior produção de leite, sendo o grupo indicado para ser explorado nas condições do presente estudo, sendo que a qualidade do leite não foi afetada pela composição racial. Não ocorreu diferença significativa entre os componentes do leite entre os grupos genéticos e os animais ½ Alpina apresentam menores valores de contagem de células somáticas entre os grupos genéticos, sendo estes mais adaptados às condições ambientais e menos susceptíveis às infecções da glândula mamária. Palavras-chaves: ambiência, contagem de células somáticas, caprinocultura, grupo racial, produção leiteira. PHYSIOLOGICAL VARIABLES, PRODUCTION AND QUALITY OF ALPINE GOATS MILK IN THE SEMIARID IN THE DRYING PERIOD ABSTRACT: The aim of this study was to verify the effect of the environment on the physiological variables, productive performance and milk quality of goats from three genetic groups, Parda Alpines, ¾ Parda Alpine + ¼ SRD and ½ Parda Alpine + ½ SRD, in semi-arid dry period in Paraiba State. The statistical design used was completely randomized, with 3 treatments and 9 replicates. The data were submitted to analysis of variance (ANOVA) and the means were compared by Tukey test at 5% of significance. It was concluded that Parda Alpina goats, from genetic compositions ½, ¾ and pure, were able to maintain the homeothermia, similarly using increased respiratory rate during the hottest hours of the day. The composition ¾ Parda Alpina + ¼ SRD presented higher milk production, being the group indicated to be explored under the conditions of this present study, milk quality was not affected by racial composition. There was no significant difference between milk components between the genetic groups and the ½ Alpine animals, showing lower values of somatic cell counts among the genetic groups, turn them more adapted to the environmental conditions and less susceptible to mammary gland infections. Keywords: ambience, somatic cell count, goat breeding, racial group, dairy production
This work aimed to perform bioclimatic zoning based on the temperature and humidity index (THI) for quails from the 3rd to the 5th week of life during the rainy season in the state of Paraíba, Brazil, in order to identify the most suitable mesoregions among the Zona da Mata, Agreste, Borborema and Sertão for the breeding of these birds and to propose mitigating measures for the thermal comfort of the animals. The monthly air temperature and relative humidity data for calculating the THI were obtained from conventional meteorological stations of the National Meteorological Institute of the Brazilian federal government from 1961 to 2015, in turn making maps with the spatial distribution of the index. The index ranged from 71 to 76 in the various mesoregions of Paraíba, with Agreste being the best mesoregion for breeding quails from the 3rd to the 5th week of life, thus providing a thermal comfort zone for birds and only requiring a few corrective measures in their facilities, when necessary, followed by the Sertão, Zona da Mata and Borborema mesoregions.
The objective of this study was to evaluate the effect of threonine:digestible lysine ratio in the diet on the physiological variables and weight of organs of light laying hens. Two hundred and ten 47 week-old Dekalb White laying hens were distributed in a completely randomized design, with five levels of threonine (0.507; 0.552; 0.597; 0.642 and 0.677%) and seven replicates of six birds each. The experimental period was 10 weeks, totaling 62 days and more eight days for the animals to adapt. The physiological parameters of cloacal temperature (CT), respiratory rate (RR) and average surface temperature (AST) were recorded weekly (7:00 am, 10:00 am, 1:00 pm, 4:00 pm, and 7:00 pm); after solid and water fasting, the birds were slaughtered to assess the absolute weight of the organs. The time of day influenced (p < 0.05) the physiological parameters RR and AST, and CT showed a significant effect (p < 0.05) of increasing levels of digestible threonine. The total weight of the pancreas, proventriculus and lung showed a significant effect (p < 0.05) of the increase in the levels of digestible threonine. The respiratory rate is affected by the levels of threonine in the diet. The 0.687% level promoted hypertrophy of the pancreas, proventriculus and lung, promoting more significant activity of these organs.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.