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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

La terminologie pastorale en languedocien : étude dialectologique et sémantique

Mills, Geoffrey January 1973 (has links)
This thesis is concerned with the presentation, a dialectological study and a semantic analysis, of modern Occitan vocabulary related to sheep-raising. The corpus was obtained by means of a questionnaire used in interviews with dialect-speaking shepherds or rural inhabitants familiar with sheep-raising practices. A major problem during the gathering of the data was finding informants who were native to the localities chosen in southeastern Languedoc. The area covered by the enquetes is roughly rectangular, extending from Mende in the north to the Mediterranean in the south, the river Vidourle in the east to within a few kms, of Albi in the west. The departements of the Herault, Aude, Tarn, Gard, Aveyron and Lozere fall either fully or partially within this zone. The dialectological study consists of a discussion of the influences of natural barriers on the distribution of certain lexical items within the zone and the possible effects of the transhumance on word movement. A set of 58 maps, relegated to the appendix, serves to illustrate patterns of distribution, which in most cases, coincide with those found in the dialectological studies of Mr. Louis Michel(La langue des pecheurs du Golfe du Lyon). The semantic analysis is in two parts: the first section attempts to characterise (g)ccitan vocabulary in contrast to the vocabulary of standard French, using traditional methods of analysis as illustrated by Mr. Stephen Ullmann (Precis de semantique franqaise); the second section is an examination of certain modern theories of semantics, notably Mr. John Lyons* theory of semantic relations, and the theory of componential analysis as originally explained by Messrs. Katz and Fodor. Both theories appeared to be inadequate in describing the structure of the vocabulary of a natural language such as Occitan. The final section of the thesis consists of a complete glossary with cross-references to the corpus. The main points of interest of this synchronic study are the presentation of many lexical items not found in the Occitan dictionaries, which will supplement present work on linguistic atlases in the zone studied, and the rather negative but none-the-less useful conclusions of the semantic analysis, which will make a contribution to general semantic theory. / Arts, Faculty of / French, Hispanic, and Italian Studies, Department of / Graduate
22

The influence of genotype on sperm motility and sperm head morphometry of Merino (Ovis aries) sheep

Boshoff, Ninja Hettie 04 1900 (has links)
Thesis (MScAgric)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: The application of assisted reproductive biotechnologies in sheep flocks is hampered by the susceptability of ovine sperm to cryodamage. There is still considerable scope in the improvement of cryopreservation protocols for ovine sperm to minimize the degree of damage to sperm during the cryopreservation process. Pre-cryopreservation processing has a definite effect on the survivability, motility, and fertilizing ability of sperm. Little information is however available on the potential contribution of the genetic make-up of rams, divergently selected for fecundity, on the ability of sperm to offer resistance to the damage caused by cooling, cryopreservation and thawing. The study aimed to investigate the influence of genetic selection for prolificacy (i.e. High Merino Line and Low Merino Line in terms of fecundity) on the ability of ovine sperm to offer resistance to cryodamage. The study investigated the effect of pre-cryopreservation processing by comparing motility and morphometry traits recorded for fresh- and post-thaw Merino ejaculated and epididymal sperm samples obtained form the High and Low lines, respectively. The effect of different sperm concentrations, equilibration periods and the addition or omission of seminal plasma from cryopreserved samples on the viability and morphometrical traits were also investigated. Ejaculate samples were collected by means of the artificial vagina (AV) method from 8 High Line rams and 7 Low Line rams. Epididymal samples were collected from 6 rams of each of the High and Low lines respectively, by recovering the epididymal sperm via aspiration from the cauda epididymides post mortem. Ejaculate samples were subjected to macroscopic and microscopic evaluation, and epididymal samples only to microscopic evaluation, for which the Sperm Class Analyzer® program was used for the evaluation of motility and morphometric measurements. Sperm motility recordings were captured at 100 frames per second. From findings of the study, it was concluded that genotype had no positive influence on the conception rate of the ewes mated to the High or Low Line rams, even though the rams from the two lines differed significantly in terms of their serving capacity. When sperm morphometry was evaluated for fresh ejaculate samples, the two lines differed significantly in terms of the morphometric traits elongation and ellipticity. Epididymal and ejaculated sperm obtained from Low Line rams had broader and rounder heads, compared to sperm obtained from High Line rams. When morphometry was assessed for sperm samples between the two methods of sperm recovery (collected with an AV or recovery via aspiration from the cauda epididymides of sacrificed rams), no morphometrical differences were observed. Significant differences were reported for the majority of the sperm motility traits (i.e. percentage motile, rapid-, medium-, slow swimming, curvilinear velocity (VCL), straight line velocity (VSL), average path velocity (VAP), and amplitude of the lateral head displacement (ALH)) recorded for ejaculated and epididymal sperm. The motility traits ALH and beat-cross frequency (BCF) analysed for epididymal sperm differed significantly between the two lines. When epididymal sperm were evaluated post-thaw, it became evident that the sperm obtained from the High Line rams had a larger acrosome surface cover when compared to that of the Low Line ram sperm. The addition of seminal plasma to epididymal samples did not result in an improvement of the preservation of sperm motility. It is known from the literature that cryopreservation causes a decrease in sperm head size. Head width was unaffected by cryopreservation with the addition of seminal plasma in this study, indicating a potential benefit with the use of seminal plasma in the cryopreservation protocol of epididymal ram sperm. The study compared two pre-processing techniques, i.e. the more time consuming swim-up technique (SUT) with a more time-efficient ‘flush technique’ (FT) to optimize the pre-processing protocol for motility assessment of sperm samples before cryopreservation of ram sperm. Comparison of the SUT and FT indicated that almost all of the motility parameters measured using the FT compared favourably with those obtained using the SUT. The results indicated that the FT can be used a more time-efficient technique to use for determining the motility of a sperm sample prior to cryopreservation. In conclusion, line differences associated with reproduction were observed in terms of the serving capacity of the rams, with selection for fecundity influencing the morphometric traits elongation and ellipticity for sperm obtained from the two lines. Future studies should be aimed at investigating morphometric traits of ovine sperm, to correlate it with fertilizing ability of sperm post-thaw and ensure optimal cryopreservation processing. / AFRIKAANSE OPSOMMING: Die toepassing van ondersteunende reproduksie tegnieke in skaaptroppe word bemoeilik deur die onvermoë van ram sperme om weerstand teen bevriesingskade te bied. Daar is nog baie ruimte vir die verbetering van die bevriesingsprotokolle vir skaap sperm om die omvang van bevriesingskade te verminder. Voor-bevriesing verwerking het dan 'n besliste uitwerking op die oorlewing, beweeglikheid en bevrugtingsvermoë, van skaap sperme. Min inligting is beskikbaar oor die potensiële bydrae van die genetiese samestelling van ramme wat uiteenlopend op grond van vrugbaarheid geselekteer is, op die vermoë van skaap sperme om weerstand te bied teen die skade wat deur verkoeling, diepbevriesing en ontdooiing, veroorsaak word. Die doelwit van die studie was om die invloed van genetiese seleksie vir fekunditeit (d.i. Hoë Merino Lyn en Lae Merino Lyn in terme van fekunditeit) op die vermoë van skaap sperme om weerstand teen bevriesingskade te bied, te ondersoek. Die studie het getoets wat die bevriesing proses se effek op epididimale sperme is, deur sperm motiliteit en -morfometrie te vergelyk tussen vars gekollekteerde sperme en sperm monsters na ontdooiing. Die effek van verskillende sperm konsentrasies, ekwilibrasie tydperke en die byvoeging of uitsluiting van seminale plasma op die lewensvatbaarheid en morfometriese eienskappe van Merino ramsperme is ondersoek in die studie. Geëjakuleerde monsters is versamel met behulp van 'n kunsmatige vagina (AV) van 8 Hoë Lyn en 7 Lae Lyn ramme. Epididimale monsters is verkry van 6 ramme van elk van die Hoë en Lae Lyne, deur middel van aspirasie van die sperme uit die cauda epididimii nadoods. Geëjakuleerde sperm monsters is met behulp van makroskopiese en mikroskopiese metodes geëvalueer, en epididimale sperm monsters slegs mikroskopies geëvalueer, met behulp van die Sperm Class Analyzer® program wat vir die evaluasie van beweeglikheid en morfometriese afmetings gebruik is. Sperm beweeglikheids opnames is opgeneem teen 100 raampies per sekonde. Die resultate van die studie het aangedui dat genotipe geen effek het op besetting van die ooie gepaar met die Hoë of Lae Lyn ramme gehad het nie, terwyl die dekvermoë aansienlik tussen ramme van die twee lyne verskil het. Wanneer die morfometriese eienskappe van vars geëjakuleerde sperme vergelyk was, het die lyne beduidend in terme van die morfometriese eienskappe van verlenging (elongation) en elliptisiteit verskil het. Die epididimale en geëjakuleerde sperme verkry vanaf die Lae Lyn ramme het ʼn breër en ronder kopvorm getoon as sperme wat verkry is van die Hoë Lyn ramme. Wanneer die morfometriese eienskappe van sperme versamel met die twee verskillende metodes (d.i. kunsmatige vagina of aspirasie vanuit die cauda epididimides) vergelyk was, is geen morfometriese verskille waargeneem nie. Die meeste sperm beweeglikheidseienskappe (d.i. persentasie beweeglike, vinnig-, medium- en stadig-swemmende sperme, VCL, VSL, VAP en ALH) van geëjakuleerde en epididimale sperme het verskil. Die beweeglikheidseienskappe amplitude van die laterale verplasing van die spermkop (ALH) en frekwensie waarmee sperm sy eie pad kruis (BCF), soos bepaal vir epididimale sperme, het beduidend tussen die twee lyne verskil. Met die evaluering van epididimale sperme na ontdooiing was dit duidelik dat sperme verkry van die Hoë Lyn ramme 'n groter mate van akrosoom-oppervlak gehad het, in vergelyking met sperme van die Lae Lyn ramme. Die byvoeging van seminale plasma by epididimale monsters het nie bygedra tot 'n verbetering van spermbeweeglikheid nie. Bestaande literatuur dui aan dat diepbevriesing 'n afname in die kopgrootte van sperme veroorsaak. In hierdie studie het die byvoeging van seminale plasma ʼn verandering in kopgrootte voorkom, wat dui op ʼn potensiële voordeel om seminale plasma in die bevriesingsprotokol van epididimale ramsperme in te sluit. Die studie het twee beweeglikheid bepalingstegnieke vergelyk om te bepaal of die tydrowende “opswem” tegniek (SUT) vervang kan word met 'n meer tyd-doeltreffende "spoel tegniek” (FT) in die voorbevriesing verwerking protokolle van ram sperme. Vergelyking van die twee tegnieke het aangedui dat die meeste van die kinematiese eienskappe van die FT gunstig met die waardes soos verkry met die SUT, vergelyk het. Resultate het getoon dat die FT parameters goed vergelyk met die beweeglikheid parameters van die SUT, dus kan dit aangeneem word dat die FT ʼn meer tyd-doeltreffende tegniek is wat vergelykbare sperm beweeglikheidsinligting oor skaap sperm monsters voor bevriesing sal verskaf. In samevatting is verskille in terme van die dekvermoë en op morfometriese vlak, meer spesifiek die eienskappe van verlenging (elongation) en elliptisiteit, tussen die twee lyne waargeneem. In toekomstige studies moet die morfometriese eienskappe van skaapsperme verder bestudeer word, asook die korrelasie daarvan met die bevrugtingsvermoë na ontdooiing bepaal om sodoende die diepbevriesing protokolle van skaapsperme te optimaliseer.
23

Phenotypic and genetic parameters for the S.A. Strongwool merino strain with an emphasis on skin characters as early indicators of wool productivity

Hill, Jane Adair. January 2001 (has links) (PDF)
Bibliography: leaves 325-341. Skin and fleece measurements were recorded at different ages for both male and female sheep from the Turretfield Merino Resource Flock and used to estimate the heritability of each trait and the phenotypic and genetic correlations among and between the skin and fleece traits. Generally, the heritability of each trait was high, which indicates that both the fleece and skin traits should respond well to selection.
24

Effect of peri-conceptional feed intake on early embryo development and fetal growth in the Merino ewe / Muhammad Azam Kakar.

Kakar, Muhammad Azam January 2003 (has links)
"March 2003" / Includes bibliographical references (leaves 237-297) / ix, 297 leaves : ill. (some col.), plates (col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, School of Agriculture and Wine, Discipline of Animal Science, 2005
25

A study of factors affecting embryonic, fetal and lamb survival in high fecundity merino ewes

Kleemann, D. O. January 1994 (has links) (PDF)
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.
26

Behavioral and physiological responses of ewes to semiconfinement and two nutritional levels in a desert climate

Gardner, Billy Wayne January 1980 (has links)
No description available.
27

Analýza reprodukčních vlastností plemene zwartbles

DVOŘÁKOVÁ, Jana January 2016 (has links)
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 %. There was a significant difference in fertility (p < 0,05) and even highly significant difference in rearing (p < 0,01) among the monitored flock and the flocks in the performance monitoring. The percentage of fertilization and intensity in breeding didn´t achieve satisfactory values, primarily due to the high percentage of futility in sheep in average of 25,5 %. All the reproduction indicators are below the breed average. Lambing number on litter size was evaluated as highly significant (p < 0,01). Ewe age at lambing was assessed as a highly significant influence exerted on fertility (p < 0,01). Influence paternal lines of ewes on their fertility was not statistically demonstrated (p 0,05).
28

Vyhodnocení úrovně vybraného chovu ovcí / The standard of chosen sheep farm analysis

HRBKOVÁ, Jana January 2009 (has links)
Sheep breeding is very suitable branch to be practised on the mountain. The thesis deals with sheep breeding level in chosen mountain stud. The purpose of the thesis is interpretation of quality indicators of sheep at the farm and also making financial analysis. At the close there can be found some recommended disposal how to improve enterprise efficiency.
29

Desempenho de ovelha mistas no pós-parto e de suas crias em sistema de creep feeding e em fase de determinação / Performance of post - partum sheep half blood texel - Santa Inês, and their seals, in effect, creep - feeding system

Moreira, Yara Rodrigues 26 February 2016 (has links)
Made available in DSpace on 2018-08-01T22:56:56Z (GMT). No. of bitstreams: 1 tese_7909_Yara Rodrigues.pdf: 611086 bytes, checksum: 907c72da2ac36699070935e606fcd34f (MD5) Previous issue date: 2016-02-26 / Foram avaliadas as características produtivas (ganho de peso e medidas morfométricas) de ovelhas, recém-paridas das raças Santa Inês e Texel, em pastejo intensivo, submetidas à suplementação concentrada, em manejo de cria em aleitamento natural. Além disso, avaliou-se desempenho ponderal (ganho de peso e medidas morfométricas) dos borregos, filhos das mesmas ovelhas, em fase de aleitamento suplementados ou não em sistema de creep - feeding e, posteriormente, em fase de terminação, submetidos a três níveis de inserção de concentrado (0, 400 e 800 g. Animal. Dia-1). Na fase de terminação, foram utilizados 24 cordeiros desmamados. Como procedimento para a avaliação dos tratamentos no estudo das ovelhas e dos borregos em fase de aleitamento, o delineamento experimental utilizado foi o em blocos casualizados, sendo as diferenças entre tratamentos determinadas por meio do teste de F. No ensaio de terminação dos borregos, as variáveis avaliadas foram submetidas à análise de variância, seguido e um ajustamento em regressão linear. Todos os procedimentos inferenciais foram efetuados considerando para a manifestação das diferenças, um erro aleatório máximo de 5%. Não foram encontrado aumento no do peso corporal em nenhuma das duas categorias animal estudadas na fase de aleitamento. Nas características morfométricas, as ovelhas do grupo 2 apresentaram menor altura de garupa. Na fase de terminação os animais suplementados apresentaram melhor desempenho ao apresentarem peso ideal para o abate aos 95 dias, idade em que os animais sem suplementação apresentavam média de peso inferior a 28 kg. Já para morfometria,os animais deste segundo ensaio apresentaram homogeneidade nas características morfométricas. / Productive characteristics evaluated (weight gain and morphometric measurements) of sheep, newly calved of Santa Inês and Texel, intensive grazing, submitted to concentrate supplementation, in nestling management. In addition, it evaluated weight gain (weight gain and morphometric measurements) of lambs, sons of the same sheep in supplemented breast-feeding or not creep system - feeding and later finishing phase, subjected to three levels concentrated insert (0, 400 and 800 g. Animals. Day-1). In the finishing phase, 24 weaned lambs used. As a procedure for the evaluation of treatments in the study of the sheep and lambs in feeding phase, the experimental design was a randomized block, with the differences between treatments determined by the F test in lambs termination assay, evaluated variables subjected to analysis of variance followed and an adjustment in linear regression. All inferential procedures performed considering for the manifestation of the differences, a maximum of 5% random error. There found increase in body weight in either animals categories studied in breast-feeding. In the morphometric characteristics, group 2 ewes had lower height croup. In the finishing phase, the supplemented animals showed better performance when submitting ideal weight for slaughter at 95 days, the age at which animals without supplementation had average weight less than 28 kg. As for morphometry, the animals of the second test showed homogeneity in the morphometric characteristics.
30

Desempenho de ovelha mistas no pós-parto e de suas crias em sistema de creep feeding e em fase de determinação / Performance of post - partum sheep half blood texel - Santa Inês, and their seals, in effect, creep - feeding system

Moreira, Yara Rodrigues 26 February 2016 (has links)
Made available in DSpace on 2018-08-01T22:56:56Z (GMT). No. of bitstreams: 1 tese_7909_Yara Rodrigues.pdf: 611086 bytes, checksum: 907c72da2ac36699070935e606fcd34f (MD5) Previous issue date: 2016-02-26 / Foram avaliadas as características produtivas (ganho de peso e medidas morfométricas) de ovelhas, recém-paridas das raças Santa Inês e Texel, em pastejo intensivo, submetidas à suplementação concentrada, em manejo de cria em aleitamento natural. Além disso, avaliou-se desempenho ponderal (ganho de peso e medidas morfométricas) dos borregos, filhos das mesmas ovelhas, em fase de aleitamento suplementados ou não em sistema de creep - feeding e, posteriormente, em fase de terminação, submetidos a três níveis de inserção de concentrado (0, 400 e 800 g. Animal. Dia-1). Na fase de terminação, foram utilizados 24 cordeiros desmamados. Como procedimento para a avaliação dos tratamentos no estudo das ovelhas e dos borregos em fase de aleitamento, o delineamento experimental utilizado foi o em blocos casualizados, sendo as diferenças entre tratamentos determinadas por meio do teste de F. No ensaio de terminação dos borregos, as variáveis avaliadas foram submetidas à análise de variância, seguido e um ajustamento em regressão linear. Todos os procedimentos inferenciais foram efetuados considerando para a manifestação das diferenças, um erro aleatório máximo de 5%. Não foram encontrado aumento no do peso corporal em nenhuma das duas categorias animal estudadas na fase de aleitamento. Nas características morfométricas, as ovelhas do grupo 2 apresentaram menor altura de garupa. Na fase de terminação os animais suplementados apresentaram melhor desempenho ao apresentarem peso ideal para o abate aos 95 dias, idade em que os animais sem suplementação apresentavam média de peso inferior a 28 kg. Já para morfometria,os animais deste segundo ensaio apresentaram homogeneidade nas características morfométricas. / Productive characteristics evaluated (weight gain and morphometric measurements) of sheep, newly calved of Santa Inês and Texel, intensive grazing, submitted to concentrate supplementation, in nestling management. In addition, it evaluated weight gain (weight gain and morphometric measurements) of lambs, sons of the same sheep in supplemented breast-feeding or not creep system - feeding and later finishing phase, subjected to three levels concentrated insert (0, 400 and 800 g. Animals. Day-1). In the finishing phase, 24 weaned lambs used. As a procedure for the evaluation of treatments in the study of the sheep and lambs in feeding phase, the experimental design was a randomized block, with the differences between treatments determined by the F test in lambs termination assay, evaluated variables subjected to analysis of variance followed and an adjustment in linear regression. All inferential procedures performed considering for the manifestation of the differences, a maximum of 5% random error. There found increase in body weight in either animals categories studied in breast-feeding. In the morphometric characteristics, group 2 ewes had lower height croup. In the finishing phase, the supplemented animals showed better performance when submitting ideal weight for slaughter at 95 days, the age at which animals without supplementation had average weight less than 28 kg. As for morphometry, the animals of the second test showed homogeneity in the morphometric characteristics.

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