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Дисертації з теми "Sheep Fertility"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 1 лютого 2022

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1

Quintana, Casares Pablo Ignacio. "Studies on the relationship between characteristics of ram semen and fertility." Title page, contents and summary only, 1991. http://web4.library.adelaide.edu.au/theses/09PH/09phq7.pdf.

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Анотація:

Includes bibliographical references (leaves 274-316) Examines several aspects of male reproduction in the sheep, and how these are related to fertility in the female when semen is introduced by natural mating or artificial insemination.

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2

Singh, Inderjeet. "Embryonic survival in adrenal hyperactivity in sheep." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386839.

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3

Findlater, Richard Cameron Fraser. "Intrauterine insemination to improve fertility with frozen semen in sheep." Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328811.

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4

Al-Shorepy, Salih Abdu. "Selection to improve spring fertility in a crossbred sheep population." Diss., Virginia Tech, 1995. http://hdl.handle.net/10919/40136.

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Анотація:

Reproductive and productive performance of a composite sheep population, containing 50% Dorset, 25% Rambouillet and 25% Finn sheep breeding and under selection for ability to lamb in the fall, was evaluated. Traits considered were spring fertility, faIl litter size, live weights at birth, weaning, and at about 90 and 120 d of age, and scrotal circumference at weaning and at about 90 and 120 d of age. Fertility was defined as 1 or 0 depending upon whether a ewe lambed or failed to lamb, respectively, in fall. Litter size was defined as the number of lambs born per ewe lambing. A total of 1,102

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5

Auclair, Dyane. "Pubertal development in the merino ram lambs and immunization against oestrogens." Title page, contents and summary only, 1993. http://web4.library.adelaide.edu.au/theses/09PH/09pha898.pdf.

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Анотація:

Bibliography: leaves 281-316. Presents investigations on pubertal development in South Australian merino ram lambs and examines the effect of active and passive immunizations against oestradiol-17ℓ or oestrone on testicular maturation.

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6

Jordan, Katherine Mead. "Characterization of seasonal reproduction in Virginia Tech Selection Line, St. Croix, and Suffolk ewes." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/28663.

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Анотація:

This dissertation research contained three studies. The first two studies were conducted to investigate the ability of ewes to rebreed while lactating during seasonal anestrus. Breeds studied included the Virginia Tech Out-of-season (OOS) Line, which is a wool line genetically selected to lamb in the fall, and the St. Croix, a hair breed of tropical origin thought to be lowly seasonal. When January-lambing ewes were exposed to rams while lactating in April, significantly more OOS than St. Croix ewes were marked by rams in the first 21 d and total 39 d of ram exposure (58.3 vs. 8.7%, P = 0.0

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7

Ahmad, Nazim. "A study of the control of luteal function in the sheep and goat." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316651.

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8

Vanimisetti, Hima Bindu. "Genetic evaluation of ewe productivity and its component traits in Katahdin and Polypay sheep." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/29760.

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Анотація:

The objectives of this dissertation were to evaluate genetic influences on ewe productivity, its growth and reproductive components, and measures indicative of accelerated lambing performance. Genetic parameters were estimated for total weight of litter weaned per ewe lambing (TW) and its components, number of lambs born (NB), number of lambs weaned (NW) and average weight of lambs weaned (AW), measured as traits of the ewe, and lamb survival (LS) and weaning weight (WW), measured as traits of the lamb, in Katahdin sheep. Heritabilities of TW, NB, NW, and AW, were 0.12, 0.12, 0.09, and 0.13, r

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9

Kelany, Khaled Elaraby. "Can Hematocrit Levels at Estrus in Dairy Cows and Sheep Be an Indicator for Pregnancy Success?" Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31604.

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Анотація:

Despite the major reproductive advances in the livestock industry, prenatal embryonic loss is still one of the major issues that causes substantial economic loss. While there are many tests available to determine pregnancy soon after maternal recognition of pregnancy, most of the prenatal losses are undetectable because it occurs before then. Based on previous research we hypothesized that increased plasma volume around the time of estrus will increase the survivability of the embryo at early stages of gestation. However, our findings indicate that hematocrit levels are not a consistent measur

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10

Nugent, Russell A. III. "Effects of breed and ram exposure on Spring estrous behavior and Summer fertility in domestic ewes." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/44057.

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The present studies were conducted to check the effects of acute ram introduction into a flock of anestrus ewes in Virginia. Ewes were bled via jugular venipuncture twice weekly and serum samples were radioimmunoassayed for progesterone (P4) content as an indicator of estrous activity. All rams were fitted with crayon equipped marking harnesses for use as an indicator of mating behavior in ewes. The first study tested the effects of introduction of vasectomized rams into a flock: of' 50 Dorset (D) and 50 Hampshire (H) purebred ewes in either May or June. More D ewes ovulated (96% vs

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11

O'Connell, Anne R., and n/a. "Heritability and phenotypic analysis of high embryonic survival in prolific ewes." University of Otago. Department of Anatomy & Structural Biology, 2009. http://adt.otago.ac.nz./public/adt-NZDU20091009.160105.

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A significant proportion of potential lambs are lost (commonly 15-20%) between ovulation and day 30 of gestation. Moreover, little is known about factors associated with multiple birth capacity of the uterus which would be necessary to convert gains in ovulation rate to the birth of live lambs. This project has investigated the relationship between maternal uterine and hormonal environment as well as the heritability of embryonic survival (ES) in prolific ewes. Litter size (LS) from known ovulation rate (OR) records (n=6393) collected over 16 years were analysed for heritability. ASReml analys

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12

Andrew, Shelley Lewis Jr. "Budget Analysis of Spring, Fall with Winter Clean-up, and High-Fertility Fall Lambing Systems in a Simulated Fixed Forage Resource." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/37021.

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A successful business needs to generate enough cash to cover expenses, current debt, and family living expenses, pay interest on owned and borrowed capital, maintain productivity, and earn a reasonable return for the operator. Income from sheep production is generally only part of a total farm and nonfarm income. Thus options, opportunity costs, and decisions regarding the sheep production enterprise are not isolated; they affect other agricultural enterprises. Sheep production consistently returns profits to producers, which makes it an enticing agricultural enterprise. There are advantag

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13

Vedegytė, Vaida. "Ūkio dydžio įtaka avių produktyvumui." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140618_233058-29401.

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Анотація:

Temos aktualumas. Avininkystė Lietuvoje yra svarbi žemės ūkio sritis. Šio sektoriaus plėtrai šalyje yra palankios gamtinės sąlygos, susiformavusios gyvulių auginimo tradicijos, sukaupta patirtis. Gyvulininkystės sektorius yra daugiašakė ir įvairiapuse produkcija pasižyminti veikla, reikšminga Lietuvos gyventojams daugeliu ekonominių ir socialinių aspektų. Šis sektorius yra reikšmingas, aprūpinant Lietuvos vartotojus įvairiais maisto produktais bei svarbus Lietuvos eksporto šaltinis. Gyvūninės kilmės produktai yra svarbi subalansuotos mitybos dalis. Juose yra daug žmogaus organizmui reikalingų

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14

Martins, Andreia Filipa Vairinhos. "Clínica e reprodução de espécies pecuárias." Master's thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/13568.

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Neste relatório são descritas as atividades desenvolvidas durante o estágio curricular em clínica e reprodução de espécies pecuárias. Contempla ainda uma revisão bibliografia e um estudo de caso sobre os fatores que afetam a fertilidade e a avaliação da eficiência reprodutiva em ovinos. No estudo de caso procurou avaliar-se a influência da idade, da raça e da condição corporal na fertilidade de um rebanho leiteiro, em duas épocas de cobrição (estudo 1) e na sincronização de estros (estudo 2). A fertilidade do efetivo variou segundo a época de cobrição (58,2% e 55,9%, na cobrição de junho-outub

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15

Kleemann, D. O. "A study of factors affecting embryonic, fetal and lamb survival in high fecundity merino ewes." Title page, table of contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phk638.pdf.

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Bibliography : leaves 120-133. Defines the sources of reproductive wastage in FecB FecÊ Booroola Merino x South Australian Merino ewes and examines factors associated with the survival of embryos, fetuses and lambs with the aim of improving net reproduction efficiency. Experiments were conducted to define the problem; to examine factors affecting embryonic and fetal loss; and, to investigate factors influencing wastage at lambing.

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16

Nottle, Mark Brenton. "Short-term nutrition and its effect on ovulation in the ewe." Title page, table of contents and summary only, 1988. http://web4.library.adelaide.edu.au/theses/09PH/09phn921.pdf.

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17

Perez, Henrique Leal. "Desempenho produtivo e reprodutivo de ovinos lanados /." Jaboticabal : [s.n.], 2008. http://hdl.handle.net/11449/96544.

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Resumo: A demanda por produtos de origem animal, tem aumentado, paralelamente a este crescimento, observam-se esforços para promover melhorias na produtividade de carne dos rebanhos ovinos. Com o objetivo de estudar o desempenho produtivo e reprodutivo de cruzas de ovinos lanados, foram utilizados os dados da escrituração zootécnica do rebanho, pertencente ao Setor de Ovinocultura do Departamento de Zootecnia da Faculdade de Ciências Agrárias e Veterinárias (FCAV/Unesp), Jaboticabal, SP. Os dados da escrituração foram oriundos de 312 ovelhas, sendo 129 da raça Ideal, 44 1/2 Ile de France 1/2 I

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18

Perez, Henrique Leal [UNESP]. "Desempenho produtivo e reprodutivo de ovinos lanados." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/96544.

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Made available in DSpace on 2014-06-11T19:28:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-07-18Bitstream added on 2014-06-13T20:57:57Z : No. of bitstreams: 1 perez_hl_me_jabo.pdf: 253936 bytes, checksum: b4207e189c180a854872829f47586958 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>A demanda por produtos de origem animal, tem aumentado, paralelamente a este crescimento, observam-se esforços para promover melhorias na produtividade de carne dos rebanhos ovinos. Com o objetivo de estudar o desempenho produtivo e reprodutivo de cruzas de ovinos la

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19

Scohier, Alexandra. "Impact d'une mise en defens temporaire de prairies permanentes durant le pic de floraison : sélection alimentaire des brebis, diversité floristique et entomologique (Lepidoptera, Bombidae, Carabidae) des couverts." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2011. http://tel.archives-ouvertes.fr/tel-00708561.

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L'érosion de la biodiversité prairiale est devenue une préoccupation majeure à l'échelle Européenne. Le pâturage ovin est supposé avoir un impact négatif sur la diversité prairiale, en raison de leur forte sélectivité pour les dicotylédones, indispensables aux insectes pollinisateurs. Comparés aux bovins, les ovins structurent peu les couverts et créent également moins de niches écologiques contrastées. L'objectif de cette thèse était de tester la faisabilité, et les bénéfices en pâturage ovin, d'une conduite en rotation dans laquelle une sous-parcelle est temporairement exclue du pâturage au

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20

Figueiredo, Cristiane Leite. "Estimativas de componentes de (co)variância e parâmetros genéticos para características reprodutivas em ovinos da raça Santa Inês utilizando modelos linear e de limiar." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/74/74131/tde-29042008-090735/.

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Os objetivos deste trabalho foram estimar parâmetros genéticos, com os modelos mistos reprodutor e animal, para características reprodutivas contínuas e discretas, bem como, predizer os valores genéticos dos reprodutores para características reprodutivas contínuas e discretas em ovinos da raça Santa Inês. Foram analisadas as características reprodutivas intervalo de partos (IDP, N=1.066), fertilidade ao parto (FP, N=1.006) e número de cordeiros ao parto (NCP, N=3.593) de ovinos com partos ocorridos entre os anos de 1998 a 2005. A característica FP foi expressa na forma de fêmeas paridas em rel

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21

Madibela, Othusitse Ricky. "Protein nutrition of livestock grazing high quality pasture." Lincoln University, 2010. http://hdl.handle.net/10182/1571.

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Анотація:

This thesis describes a series of four experiments designed to evaluate the role of the supply of protein in livestock grazing high quality pasture during mating and during pregnancy. The first two studies investigated the effects of high crude protein content of spring or autumn re-growth pasture on the reproductive performance of dairy cows and of ewes at mating. The last two studies investigated how the dietary supply of protein, body condition and their interactions contribute to the breakdown of immunity during the peri-parturient period in ewes and investigated underlying endocrine mecha

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22

West, Kathryn S. "Effects of differential ewe body condition at mating and early post-mating nutrition on embryo survival." Thesis, 1990. http://hdl.handle.net/1957/37674.

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Анотація:

Two trials were conducted over consecutive years to examine the effects of ewe body condition and post-mating nutrition on ovulation rates and embryo survival. Trial 1 used 146 Polypay ewes ranging in age from 5 to 8 years in a 3 x 2 factorial array of pre-mating (high-H, low flushed-LF and low unflushed-L) and post-mating nutrition (high and low) treatments. Trial 2 was a 2 x 2 x 2 factorial array of 60 Polypay and 60 Coopworth x Polypay (C x P) three year old ewes, two pre-mating (H and LF) and two post-mating (high and low) treatments. To estimate timing and extent of embryo loss, two metho

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23

KLEČÁKOVÁ, Martina. "Vyhodnocení reprodukce v chovu ovcí clun forest." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-395331.

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Анотація:

The aim of the diploma thesis was to evaluate reproduction indicators (percentage of pregnancy, fertility, intensity, total rearing, reactivity, rearing of lambs born and total lamb mortality), their comparison over the years and the average in the Czech Republic. The influence of the age of the mother on fertility and the proportion of sheep according to the frequency of litters was also evaluated. Monitoring was carried out in breeding sheep clun forest (at 30 ewes) at Studnice farm from 2015 - 2018. In the monitored reproduction indicators, there was a statistically significant effect (P

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24

BENEŠOVÁ, Kristýna. "Vyhodnocení reprodukčních ukazatelů ve vybraném stádě ovcí." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-45858.

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It has been observed the breed herd of Texel sheep in the foothills area of Orlické mountains in the year 2005-2008. The base of herd was consisted of 374 ewes, 575 lambs and 6 rams in total. These parametres of reproduction {--} conception, fertility, rearing, empty ewes, abortions, lambing, stillborn, death after born, were monitored at ewes. For the parametres of reproduction at ewes were found significant effects of ewe´s age and ram´s line.

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25

NOVÁKOVÁ, Iva. "Vliv vybraných faktorů na plodnost u stáda šumavské ovce." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-174083.

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The goal of this Diploma thesis was an analysis of the chosen factors and their influence on sheep fertility in the herd of sumava sheep. This factors were presented through the age of sheep, sheep nutrition and stress influence on the sheep fertility. For this purpose it was chosen the sumava sheep farming in herd Michlova Hut. At first this herd was introduced, than statistically described in terms of sheep fertility and in the next part there was analysis of the chosen factors. Based on these results the conclusions and the basic breeder recommendation to breeder community were deduced. The

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26

BALOUNOVÁ, Lucie. "Vyhodnocení reprodukčních ukazatelů u původní valašky." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-115845.

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Анотація:

The aim of this thesis was to evaluate the level of reproductive performance of the Wallachian sheep in the flock of sheep bred by Jan Vejčík. At first the following parameters were evaluated in 457 ewes during the period 2007 - 2011: fertilization, fertility, reproduction intensity, total rearing, infertility, rearing of lambs born and total mortality of lambs. Then, using statistical methods, frequency of litters and effect of age on fertility of ewes were evaluated and the identified parametres were compared with the flocks originating from the Union of sheep and goats of the Czech Republic

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27

KRÁLOVÁ, Lucie. "Vyhodnocení produkčních vlastností plemene ovcí merinolandschaf." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-154803.

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Анотація:

The aim of this work is to evaluate the levels of production traits in sheep breed Merinolandschaf. Evaluation of the effect of selected factors on commercial properties in the herd of the breed. This thesis mainly focuses on the effect of age ewes, rams line at impact, influence the frequency of newborn lambs on production indicators. The evaluation of these properties were used data from performance tests and evidence from past years. The thesis should clarify some advantages in breeding should point out shortcomings and problems that occur in the breed while providing solutions to improve t

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28

DVOŘÁKOVÁ, Jana. "Analýza reprodukčních vlastností plemene zwartbles." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-251588.

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Анотація:

The thesis was focused on the reproductive traits of zwartbles breed level evaluation in Novosedly nad Nežárkou, evaluation data were compared with the average values of reproductive traits of zwartbles flocks, included in the performance monitoring of sheep in the Czech Republic, using statistical methods. Simultaneously, there was the effect of factors that might affect reproductive traits of the breed evaluated. 111 ewes were evaluated during the period 2012-2015. The average fertility in the sheeps during the monitoring period amounted to 175,7 % and an average rearing amounted to 88,5 %.

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29

STAŇKOVÁ, Dana. "Vybrané faktory ovlivňující plodnost plemene zwartbles." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-376249.

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Анотація:

The aim of this thesis was evaluate fertlility of the Zwartbles sheep in zhe flock of sheep breed by Mrs. Marie Schickerová. In the reporting period of 5 years (2013 2015) were a total of 429 ewes evaluated by the followinf parameters: fertlization, reproduction intensity, total rearing. Basic reproductive parameters were compared with the flocks originating from the Union sheep and goats of the Czech Republic. They were monitored factors that have or may have an impact on fertility. The first factor was the impact of age on fertility, selected second order lambing and the last was the i

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30

Sanchez-Partida, Luis Gabriel. "Studies on the effect of compatible solutes, epididymal compounds, and antioxidants on the post-thaw motility and fertility of pellet frozen ram spermatozoa / by Luis Gabriel Sanchez Partida." 1995. http://hdl.handle.net/2440/18596.

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Анотація:

Includes bibliographical references (leaves 232-257).<br>xv, 257 leaves : ill. ; 30 cm.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>Aims to determine if the compatible solutes (proline, glycine betaine, and trehalose), the epididymal compounds (taurine, hypotaurine and inositol) or the antioxidants (carnosine and ascorbic acid) in tris-citrate based diluents could improve the post-thaw survival and/or fertility of ram spermatazoa.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Animal Science, 1996?

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31

ŠNEJDOVÁ, Pavla. "Vyhodnocení úrovně chovu stáda ovcí plemene Suffolk." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-115844.

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Анотація:

The aim of this diploma work is to evaluate levels of reproduction and production indicators, the economics of selected stocks of Suffolk sheep and make recommendations to the owner towards improving current practices.

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32

BRÁZDOVÁ, Veronika. "Vyhodnocení reprodukčních ukazatelů ve vybraném chovu ovcí." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-50503.

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Анотація:

The aim of this thesis was to evaluate the reproductive performance over the period from 2007 to 2010 in selected Suffolk sheep. The evaluation was carried out on the basis of records kept in the selected breeding sheep at Agris Markvarec s r.o. and on own observations. During the reporting period was evaluated 1115 ewes, which were monitored the following parameters such as fertilization, fertility, intensity, rearing of lambs, infertility, ewes lambing, percentage of sheep abortions, stillborn lambs, mortality, percentage of breeding lambs and percentages of sheep by percent occurrence of th

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33

Alberto, Bruno Miguel Guilherme. "Efeitos da sincronização de cios e IA por laparoscopia vs. monta natural num conjunto de rebanhos da raça Suffolk." Master's thesis, 2019. http://hdl.handle.net/10437/12048.

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Orientação: Sofia Van Harten<br>Atualmente, não existe muita informação sobre a exploração da raça Suffolk em Portugal e, não sendo autóctone, há uma tentativa dos produtores de adaptação do animal ao nosso clima, condições e métodos de exploração. Neste estudo comparou-se a eficácia reprodutiva, com sincronização ou não de cios, com recurso a dois métodos, a monta natural versus a inseminação por laparoscopia, em ovinos da raça Suffolk. Este estudo foi feito observando as práticas de 13 explorações, uma vez que não houve grupos experimentais feitos de propósito para esta dissertação

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HUBENÁ, Michaela. "Vyhodnocení reprodukčních ukazatelů ve vybraném chovu ovcí." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-51166.

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The primary objective of the thesis will be to evaluate the reproductive performance (the percentage of pregnancy, fertility, the number of lambs reared) in a particular breed of sheep. Another aim will be to assess the impact of certain factors on reproductive performance

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ŠULCOVÁ, Veronika. "Hodnocení průběhu porodu u bahnic plemene suffolk." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-188063.

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The Suffolk is the most well-known of the English lowland sheep breeds. A black-faced sheep with short-stapled wool, the breed is used primarily for meat production. The Suffolk is classified as one of the breeds with the best ability to fatten and its meat yield is approximately 60%. The breed is characterised by its good adaptability to different climate and breeding conditions and overall good health. The ewes are known for their high fertility rate, shorter oestrus cycle, excellent maternal instincts, and high milk production. As a result of these characteristics, the Suffolk has become a

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Santos, António Manuel Barroso Rodrigues dos. "Utilização da ecografia no aumento de rentabilidade em explorações de ovinos." Master's thesis, 2013. http://hdl.handle.net/10437/4802.

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Orientação : João António Martins Cannas da Silva ; co-orientação : Maria do Carmo Feliciano<br>Neste estudo avaliou-se a eficácia reprodutiva da aplicação de dois sistemas de maneio, na época de cobrição, em ovinos. Avaliou-se também a variação sazonal de parâmetros reprodutivos. Na exploração A houve primeiro a pré-exposição a carneiros férteis (45 dias), onde se efectuaram cobrições naturais. O diagnóstico de gestação foi feito aos 90 dias, com nova introdução de machos. Posteriormente foram retirados os carneiros, realizando-se novo diagnóstico aos 180 dias. Efetuaram-se ainda dois grupos

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Catarino, João Miguel Graça. "Comparação de protocolos sincronizativos curtos e longos em raças autóctones de ovinos e caprinos." Master's thesis, 2019. http://hdl.handle.net/10437/9638.

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Orientação: Carlos Varela Bettencourt ; co-orientação: Maria Cristina Bressan<br>O objetivo neste trabalho foi determinar os efeitos de protocolos de sincronização de estro administrados no período, maioritariamente, anéstrico de ovinos (Merino Branco e Merino Preto) e caprinos (raça Serpentina) criados em condições de Alentejo (nomeadamente no Sistema Agro-pastoril Montado). Os dados avaliados foram a evolução da fertilidade, fecundidade, prolificidade em função da idade, número de animais nascidos dividido pelo total de animais inseminados, e número de animais nascidos dividido pelo total de

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Silva, Diogo Oliveira Rodrigues Guerreiro. "Exame andrológico em carneiros: avaliação do efeito da criopreservação no sémen de carneiro e seu impacto sobre a fertilidade." Master's thesis, 2019. http://hdl.handle.net/10437/9445.

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Orientação: Carlos Manuel Varela Bettencourt<br>Este estudo pretendeu: I- Descrever o procedimento do exame andrológico em carneiros e relaciona-lo com a qualidade do sémen; II- Demonstrar as alterações induzidas pela criopreservação e descongelação no sémen de carneiro; III- Comparar a eficácia de dois extensores de sémen (OVIXCellÒ e Glucose-Citrato-Gema de ovo); IV– Determinar os Índices de Fertilidade, Natalidade e número médio de borregos por parto resultantes da inseminação artificial com sémen refrigerado e descongelado. Através da estatística de Pearson, determinou-se uma correla

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