scholarly journals Reproductive and productive characteristics of hair sheep raised in the tropical region grassland of Brazil

2020 ◽  
Vol 9 (9) ◽  
pp. e331997287
Author(s):  
Jardeson de Souza Pinheiro ◽  
Paloma Eleutério ◽  
Samuel Pinho Silva ◽  
Caio Júlio Lima Herbster ◽  
Judite Antunes Cipriano ◽  
...  
Keyword(s):  
Body Weight ◽  
Coat Color ◽  
Tropical Climate ◽  
Ovis Aries ◽  
Genetic Group ◽  
Reproductive Efficiency ◽  
Tropical Region ◽  
Hair Sheep ◽  
Tropical Conditions ◽  
Santa Inês

We aimed to characterize the energetic profile of hair sheep (Ovis aries) raised on pasture in a tropical climate country and verify it is influence on productive and reproductive parameters. A total of 68 non-pregnant adult ewes were randomly distributed into four genetic groups (GGs) according to coat color (Red-coated Santa Inês GG – 17, Black-coated Santa Inês GG – 13, White-coated Morada Nova GG – 28 and Red-coated Morada Nova GG – 10). We collected blood samples at the beginning and at the end of the breeding season. The reproductive efficiency of the ewes was evaluated by fertility, prolificacy, lamb survival rate, and lamb body weight at birth and weaning. We performed statistical analyses using the package PROC GLM and the chi-square (χ2) test from SAS software. The genetic group influenced serum glucose and β-hydroxybutyrate concentrations, prolificacy, and lamb body weight. Male lambs were heavier than female lambs at birth and weaning. Twin lambs were lighter at birth and at weaning than were single lambs. The genetic group, lamb birth rank, and sex influenced the lamb body weight at birth and weaning. This study presents important information on the reproductive efficiency of these hair sheep that are relevant to tropical climate countries. The blood parameters found in this research show that there are important metabolic differences between hair sheep in the semi-arid region of Northeast Brazil. Morada Nova sheep with independent white coat color, higher reproductive performance in tropical conditions.

scholarly journals How to better conserve with genetic data: origin and population structure of Brazilian locally adapted hair sheep (Ovis aries) breeds

2019 ◽  
Author(s):  
Tiago do Prado Paim ◽  
Samuel Rezende Paiva ◽  
Natália Martins de Toledo ◽  
Michel Beleza Yamaghishi ◽  
Paulo Luiz Souza Carneiro ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Genetic Resources ◽  
Strong Relationship ◽  
Ovis Aries ◽  
East African ◽  
Hair Sheep ◽  
Sheep Breeds ◽  
Fat Tail ◽  
Santa Inês

AbstractBrazilian hair sheep constitute a genetic diversity hotspot of sheep breeds. These locally adapted genetic resources developed in harsh environments of the Brazilian Northwest (semi-arid) and maintained important traits for this region, such as parasite resistance, heat tolerance and high pelt quality. Genotypes (50K SNP chip) from seven Brazilian sheep breeds (5 hair and 2 coarse wool types) and 87 worldwide breeds were used to verify population structure, admixture and genetic diversity, using PCA and ADMIXTURE analyses. We constructed a phylogenetic tree and evaluated migration events between genetic groups using TREEMIX software. Brazilian Somali, a fat-tailed breed, was the unique breed with high relationship with East African breeds and formed a distinct cluster from other Brazilian breeds. This breed seems to contribute to formation of Santa Inês, Morada Nova and Brazilian Fat-tail breeds. Brazilian Blackbelly had a clear relationship with Barbados Blackbelly, which appeared as another group. Other Brazilian breeds seem to form a further genetic group with some recent admixtures. Morada Nova remained as a separate group, not showing a strong relationship with European or African breeds, only revealing a migration event from Sidaoun, an Algerian hair breed. Brazilian Fat-tail and Morada Nova share a common ancestor, but the first received introgressions from Brazilian Somali and Afrikaner breeds, explaining the fat-tail phenotype. Santa Inês received strong contribution from Bergamasca and had an admixed origin with recent introgressions from other breeds, mainly from Suffolk animals. In conclusion, Brazilian Somali and Brazilian Fat-tail are the most endangered sheep genetic resources in Brazil.

scholarly journals Is Bluetongue Virus a Risk Factor for Reproductive Failure in Tropical Hair Sheep in Brazil?

2021 ◽  
Vol 49 ◽  
Author(s):  
Huber Rizzo ◽  
Mario Felipe Alvarez Balaro ◽  
Ana Carolina Diniz Matos ◽  
Zélia Inês Portela Lobato ◽  
Lilian Gregory
Keyword(s):  
Risk Factor ◽  
Reproductive Failure ◽  
Fetal Malformation ◽  
Infectious Agents ◽  
Hair Sheep ◽  
Sheep Breeds ◽  
Tropical Conditions ◽  
History Of ◽  
Santa Inês ◽  
Native Sheep

Background: Bluetongue is a vector-borne viral disease transmitted by midges from the genus Culicoides. The disease can infect most of the ruminant and camelid species, but the severe disease is most often seen in european wool and mutton sheep breeds. In this sense, there is a gap in the knowledge on BTV infection in hair sheep breeds from tropical zones. Thus, this study aimed at establishing whether exposure to BTV is a risk factor for reproductive failure in Santa Inês ewes, a hair sheep breed, reared under tropical conditions in Brazil.Materials, Methods & Results: A retrospective cross-sectional study was carried out in sheep farms in São Paulo state, Brazil, after the rainy season. Serum samples from 110 Santa Inês ewes with a history of reproductive disorders, in the last 6 months, which were included: abortion, premature birth, stillbirth, retention of placenta, infertility, estrus repetition, fetal malformation, weak lamb birth and neonatal death were collected. The presence of antibodies against BTV was assessed by agar gel immunodiffusion method (AGID). Serology to the infectious agents Brucela ovis, Lepstopira spp., Toxoplasma gondii, Neospora caninum and Campylobacter sp. were also assessed. Bivariate associations between the outcome and individual explanatory variables were assessed using the Fisher's exact test. Abortion was the most common reproductive disorder (53%; 74/139) observed, followed by estrus repetition (12%; 17/139) and infertility (11%; 15/139). Other disorders related to the conceptus totaled nearly one fourth of the reported disorders. A total of 20% (22/110) of the ewes were seropositive to BTV. A higher frequency of BTV seropositive than BTV seronegative ewes with a history of abortion was found. Also, abortion with seroreactivity to BTV was tested for prevalence ratio that showed 1.38 [95% CI 1.10-1.74; P = 0.030]. With regards to the abortion involvement of other infectious diseases associated with the seropositive ewes to BTV, more than a half of ewes (53%; 10/19) were solely seropositive for BTV.Discussion: In the current study, it was detected 20% (22/110) of seropositive ewes to BTV. These findings demonstrated that even though the BTV has been considered endemic in tropical countries such as Brazil, there are regions or microclimates in which the virus cannot be present or in varied prevalence. The history of abortion was identified as the potential factor associated with BTV seropositivity in Santa Ines ewes. Equally, the differential diagnosis for other infectious agents related to abortion demonstrated the unique presence of antibodies against BTV in more than half of all cases. Other studies with native sheep flocks in Iran and Nepal also demonstrated a strong positive correlation between abortion history and seropositivity for BTV. Thus, it is possible that in other continents of the world, under tropical conditions, the virus does not behave the same asymptomatic infection such as have been reported for native sheep breeds in Africa. In conclusion, it was demonstrated that one-fifth animals were positive for antibodies against BTV clearly implying the viral spreading in the local hair sheep flocks. These findings highlight the importance of surveillance related to BTV in endemic areas. Therefore, it is recommended to strengthen the surveillance system for BTV within Brazil and to educate farmers about the management and control of this disease.  

Mineral requirements for weight gain in growing male Santa Inês and Morada Nova hair sheep

2021 ◽  
Vol 92 (1) ◽  
Author(s):  
Roberto Costa ◽  
Juscelino Silva ◽  
Ariovaldo Medeiros ◽  
Francisco Carvalho ◽  
Maria Andrade ◽  
...  
Keyword(s):  
Weight Gain ◽  
Hair Sheep ◽  
Santa Inês

Effect of season and frequency of embryo collections on superovulatory response and embryo recovery in Santa Inês hair sheep

2021 ◽  
pp. 106441
Author(s):  
Monique de Albuquerque Lagares ◽  
Fabiana Cristina Varago ◽  
Valéria Spyridion Moustacas ◽  
Valentim Arabicano Gheller ◽  
Rafael Romero Nicolino ◽  
...  
Keyword(s):  
Hair Sheep ◽  
Embryo Recovery ◽  
Santa Inês

PSXII-28 Effects of the nutritional plane before and after breeding on performance of different hair sheep breeds

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 489-490
Author(s):  
Farida Belkasmi ◽  
Raquel V Lourencon ◽  
Ryszard Puchala ◽  
Terry A Gipson ◽  
Luana Ribeiro ◽  
...  
Keyword(s):  
Body Weight ◽  
Birth Weight ◽  
Wheat Straw ◽  
Litter Size ◽  
Birth Rate ◽  
Average Daily Gain ◽  
Breeding Period ◽  
Hair Sheep ◽  
Cereal Grain ◽  
Before And After

Abstract Female hair sheep, 27 Dorper (DOR), 41 Katahdin (KAT), and 39 St. Croix (STC), were used to determine influences of nutritional planes before and after breeding on performance. There were 35 multiparous and 72 primiparous sheep, the latter 2.8±0.20 yr of age. Wheat straw [4% crude protein; dry matter (DM) basis] was consumed ad libitum and supplemented with approximately 0.25% initial body weight (BW) of soybean meal (SBM; Low) or a 1:3 mixture of SBM and rolled corn at 1% BW (High; DM). The supplementation period was 162 d, and with breeding of animals in 2 groups sequentially the pre-breeding period was 84 and 97 d and that after breeding began was 78 and 65 d. Wheat straw DM intake (1.75, 1.30, 1.57, 1.15, 1.80, and 1.38% BW; SEM=0.112), average daily gain (-46, 42, -44, 70, -47, and 51 g; SEM=7.3), and change in body condition score (-0.61, 0.36, -0.53, 0.27, -0.39, and -0.18 for DOR-Low, DOR-High, KAT-Low, KAT-High, STC-Low, and STC-High, respectively; SEM=0.058) were influenced (P < 0.05) by supplement treatment. Birth rate (66.7, 93.5, 84.6, 95.5, 82.8, and 100.0; SEM=9.83) and individual lamb birth weight (4.50, 4.61, 4.28, 3.98, 3.73, and 3.88 kg; SEM=0.201) were not affected by supplement treatment (P = 0.063 and 0.787, respectively), although litter size (0.92, 1.21, 1.17, 1.86, 1.12, and 1.82; SEM=0.221) and total litter birth weight (5.84, 5.74, 5.92, 7.52, 5.04, and 6.78 kg for DOR-Low, DOR-High, KAT-Low, KAT-High, STC-Low, and STC-High, respectively; SEM=0.529) were greater (P < 0.05) for High than for Low. In conclusion, although there was some compensation in wheat straw intake for the different levels of supplementation, SBM given alone rather than with cereal grain adversely affected body weight and condition and reproductive performance, the latter primarily through litter size but also via a trend for an effect on birth rate.

scholarly journals Sexual dimorphism in the squirrel monkey, Saimiri sciureus (Linnaeus, 1758) and Saimiri ustus (I. Geoffroy, 1844) (Primates, Cebidae)

2009 ◽  
Vol 69 (1) ◽  
pp. 171-174 ◽  
Author(s):  
B. Goldschmidt ◽  
A. Mota-Marinho ◽  
C. Araújo-Lopes ◽  
MA. Brück-Gonçalves ◽  
D. Matos-Fasano ◽  
...  
Keyword(s):  
Body Weight ◽  
Sexual Dimorphism ◽  
Squirrel Monkey ◽  
Coat Color ◽  
Morphological Characters ◽  
Saimiri Sciureus ◽  
External Ear ◽  
Adult Females ◽  
In The Wild ◽  
Capture Techniques

Causes and implications of sexual dimorphism have been studied in several different primates using a variety of morphological characters such as body weight, canine length, coat color and ornamentation. Here we describe a peculiar coat color characteristic in the squirrel monkey that is present only in adult females over five years old and which increases with age. Neither males nor young animals manifest this phenomenon, which is characterized by a spot of black hairs located anteriorly to the external ear (pinna). This characteristic could be used to discriminate adult females of Saimiri sciureus in the wild without the need of capture techniques.

scholarly journals Genetic diversity and assessment of 23 microsatellite markers for parentage testing of Santa Inês hair sheep in Brazil

2012 ◽  
Vol 11 (2) ◽  
pp. 1217-1229 ◽  
Author(s):  
C.A. Souza ◽  
S.R. Paiva ◽  
C.M. McManus ◽  
H.C. Azevedo ◽  
A.S. Mariante ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Hair Sheep ◽  
Parentage Testing ◽  
Santa Inês

scholarly journals Occurrence and practical solvent possibility of gilts preinsemination anestrus

2010 ◽  
Vol 26 (1-2) ◽  
pp. 37-46 ◽  
Author(s):  
I. Stancic ◽  
M. Gagrcin ◽  
M. Jovicin ◽  
S. Jovanovic
Keyword(s):  
Body Weight ◽  
Sexual Maturity ◽  
Good Health ◽  
Reproductive Efficiency ◽  
Ovarian Activity ◽  
Genetic Traits ◽  
Paper Review

Gilts reproductive efficiency is one of the primary factors of successful piglets' production. This performance, among other things, is expresses by the number of pregnant gilts, with desirable genetic traits, body weight and age, sexual maturity status, and general good health, provided for the replacement of sows in primary herd. This goal is very difficult to achieve in practical conditions. The main reason is occurrence of prolonged preinsemination anoestrus (oestrus was not detected even after 8 months of age). This paper review the occurrence of prolonged preinsemination anoestrus, based on the results of our and study of other authors. All studies consistently show that, in most of these gilts, pubertal cyclic ovarian activity were established, that silent oestrus occurred in only 4% of the cyclic gilts, and that this problem can be solved by applying appropriate technologies for oestrus detection, and by treatment with adequate hormonal preparations.

scholarly journals Carcass characteristics and cuts of Santa Inês lambs fed different roughage proportions and fat source

2010 ◽  
Vol 39 (6) ◽  
pp. 1322-1327 ◽  
Author(s):  
Iraides Ferreira Furusho Garcia ◽  
Amélia Katiane de Almeida ◽  
Tharcilla Isabella Rodrigues Costa ◽  
Izac Leopoldino Júnior ◽  
Julimar do Sacramento Ribeiro ◽  
...  
Keyword(s):  
Body Weight ◽  
Carcass Characteristics ◽  
Leg Length ◽  
Internal Length ◽  
Ad Libitum ◽  
Santa Inês ◽  
Total Leg

This work aimed at determining the influence of roughage proportions and fat source of the diet on characteristics of carcass and comercial cuts of lambs. It was used 24 non-castrated Santa Inês male lambs, ad libitum fed diet with two proportions of roughage (30 and 70%) and fat (no fat, protected fat, and soybean) slaughtered at an avarage body weight of 35.4 kg (± 1.5 kg). Animals fed 30% roughage diet showed the highest weights and carcass yields. The percentages of posterior arm and ham were higher in animals fed 30% roughage with no addition of fat source. Total leg length and internal length were higher in animals fed 70% roughage diet while leg width was higher for those fed 30% roughage diet. Addition of fat source in diets with high percentage of concentrate can increase carcass yields. This effect is higher when protected fat is used regarded to whole soybean. Although diets do not have effect on most of these cuts, the effect on the ham confirms the influence of the diet on this noble cuts.

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