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Dissertations / Theses on the topic 'Reproduction in animals'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ibraheem, Majid. "The manipulation of seasonality of reproduction in sheep." Thesis, University of Aberdeen, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332379.

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The phenomenon of seasonability of reproduction restricts the ewe to only one lambing around the same time every year, which in turn prevents an even supply of lamb meat to the market. The long term objective of the current study was to develop two systems of early and summer lambing using alternative techniques for the manipulation of sheep production in an attempt to produce high quality lamb throughout the year. In recent years, major advances in our knowledge of seasonality of reproduction have been the recognition of the integral role of the pineal gland and its indoleamine melatonin in t

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2

Blackman, Helen Judith. "Women, savages and other animals : the comparative physiology of reproduction, 1850-1914." Thesis, University of Manchester, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528438.

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This thesis examines the medical and scientific constructions of femininity, specifically the discoveries surrounding menstruation and the female reproductive cycle between the 1850s and the 1920s. I concentrate on the British, particularly the English, scene. I explore the emergence of reproductive physiology across four sites - obstetrics in London in the 1870s and 1880s, gynaecology in Liverpool during the late nineteenth and early twentieth centuries, embryology and morphology in Cambridge from the 1890s to the 1910s and finally the emergence of reproductive physiology from the Cambridge a

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3

Jimenez, Esbal. "Effects of Androgens on Reproduction in Female Pigs." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1206382656.

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4

Shrestha, N. P. "Factors affecting reproduction in pigs in the small scale farming sector in the hills of Nepal." Thesis, University of Aberdeen, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312456.

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This study reviews the factors affecting reproductive efficiency in PAC pigs and identifies the major constraints in traditional pig production systems in relation to climatic environment, nutrition and management practices in the hills of eastern Nepal. The different factors affecting reproductive efficiencies were investigated and the possible means to overcome these problems are outlined under Nepalese situations. The majority of the pigs in the hills of Nepal are reared below their LCT throughout the year, causing an estimated loss of 43 % of the total feed intake requirements by climatic

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5

Helliwell, Rachel J. A. "Target sites for melatonin in the sheep with particular reference to the photoperiodic control of reproduction." Thesis, University of Aberdeen, 1992. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602270.

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The aim of this study was to identify the potential target sites for the action of melatonin in sheep and to relate the findings to the photoperiodic control of reproductive activity in the female. It has been proposed that melatonin may have a direct luteotrophic role in several species, therefore the first experiment in this thesis was designed to investigate if melatonin acts directly on the ovine ovary to enhance progesterone production. The oral administration of 3mg melatonin, daily at 1500h, to anoestrous Blackface ewes advanced the onset of oestrous cyclicity and was associated with an

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6

Hanson, Sara Jeanette. "The molecular evolution of reproduction in animals: insights from sexual and asexual rotifers." Diss., University of Iowa, 2013. https://ir.uiowa.edu/etd/1618.

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Sex and meiosis are ubiquitous in eukaryotes as the primary mode of reproduction. This suggests that despite the theoretical energetic advantages of asexual reproduction, organisms capable of sexual reproduction are at a much greater long-term evolutionary advantage. Rotifers, a group of microinvertebrates, offer unique opportunities to examine the evolution of sex due to their extensive proliferation, successful adaptation to a wide variety of ecological niches, and the diversity of reproductive modes represented in the group. The cyclically parthenogenetic monogonont rotifers have overcome c

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7

Ortega-Pacheco, Antonio. "Reproduction of dogs in the tropics : with special reference to the population structures, reproductive patterns and pathologies, and a non-surgical castration alternative /." Uppsala : Dept. of Clinical Sciences, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200658.pdf.

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8

SALGADO, ANDREIA R. "Transferencia ovariana como alternativa para a restauracao das funcoes reprodutivas em femeas de camundongos irradiadas com radiacao gama de Co-60." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11530.

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Made available in DSpace on 2014-10-09T12:52:55Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:58:46Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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9

Snyder, Rebecca Jo. "A behavioral and hormonal study of giant Panda (Ailuropoda Melanoleuca) reproduction." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/29528.

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10

Ng, Pun-tung, and 吳潘東. "Reproductive traits and sexual selection in the mangrove littorinid snails, Littoraria ardouiniana and L. melanostoma." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B49799356.

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According to Darwin, any inheritable traits that enhance fitness (i.e. survival and reproductive success) would be adaptive in a given environment, and therefore subject to natural selection. Some traits that enhance reproductive success but not necessarily survival may, however, evolve through the process of sexual selection. The importance of sexual selection has been intensively studied in “higher animals” birds, mammals and insects but has largely been neglected in “lower animals” such as gastropods. Using two mangrove snails, Littoraria ardouiniana HEUDE 1885 and L. melanostoma GRAY 1839

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11

Chawanji, Abraham Simbarashe. "Spermiogenesis, sperm ultrastructure and reproductive tract morphology in cicadas implications for systematic relationships." Thesis, Rhodes University, 2007. http://hdl.handle.net/10962/d1005458.

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Sperm structure in five species of cicadine cicadas (Albanycada albigera, Azanicada zuluensis, Platypleura capensis, P. hirtipennis and Pycna semiclara) and five species of cicadettine cicadas (Melampsalta leucoptera, Quintilia walkeri, Stagira simplex, Xosopsaltria thunbergi and Monomatapa matoposa) was investigated by light and electron microscopy. In addition, spermiogenesis in cicadas was described; the information was derived from two cicadettines (Diceroprocta biconica and M. matoposa) and three cicadines (Kongota punctigera, P. capensis and P. semiclara). Mature spermatozoa of all speci

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12

Prado, Ligia Pizzatto do. "Ecomorfologia e estrategias reprodutivas nos Boidae (Serpentes), com enfase nas especies neotropicais." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316156.

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Orientador: Otavio Augusto Vuolo Marques<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-06T10:14:24Z (GMT). No. of bitstreams: 1 Prado_LigiaPizzattodo_D.pdf: 3835515 bytes, checksum: 7b2944c265d7bc36173b6191c53632b0 (MD5) Previous issue date: 2006<br>Resumo: Síndromes morfológicas relacionadas ao uso do ambiente têm sido observadas em diversas serpentes. Entretanto, a morfologia corporal pode estar associada à linhagem filogenética dos organismos. Portanto, estudos eco-morfológicos podem ser melhor realizados utilizando-s

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13

Hunt, von Herbing Ione. "Reproduction and recruitment in the bluehead wrasse Thalassoma bifasciatum in Barbados." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61833.

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14

Robinson, Julie A. "The effects of dietary molybdenum and sulfur on serum copper concentrations, growth and reproductive function in lambs." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/31319.

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Feeds often contain molybdenum (Mo) and sulfur (S) in excess of recommended allowances for adequate copper (Cu) absorption by ruminant livestock. Two randomized-block experiments were conducted using lambs given a cereal-based diet (90% of dry matter (DM) intake), containing 8 mg Cu, 0.7 mg Mo and 2.1g S per kg DM, that was either unsupplemented or supplemented with ammonium molybdate or sodium sulfate alone or in combination, to determine the effects of Mo, S and Mo+S on growth, hematology, serum Cu and Mo concentrations and reproductive function. Short term intake (4 weeks) by rams, aged 18

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15

Strydom, Aliki V. "Seasonal reproduction and sexual size dimorphism of the African helmeted turtle, Pelomedusa subrufa (family Pelomedusidae)." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52444.

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Thesis (MSc)--Stellenbosch University, 2001.<br>ENGLISH ABSTRACT: PELOMEDUSA SUBRUFA is a freshwater turtle widely distributed throughout Africa and Madagascar, and is described as a Tropical to Sub-tropical species. 1 examined the female and male reproductive cycles of P. subrufa, over a 20-month period to determine whether they display a typical Tropical to Sub-tropical type reproductive cycle (pre-nuptial) or a typical Temperate Zone type reproductive cycle (post-nuptial). Blood and tissue samples were collected from wild specimens captured in the Western Cape, South Africa and these

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16

Riedy, Christine Ann. "The association between reproductive function and body weight regulation /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9126.

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17

Krebs, Elizabeth Ann. "Reproduction in the cattle egret (Bubulcus ibis ibis) : the function of breeding plumes." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60507.

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This study investigates the colonization of Barbados, the seasonality of breeding, and the function of breeding plumes in the cattle egret Bubulcus ibis ibis. Colonization occurred around 1956, and the island now has 4 colonies. Numbers of birds at each colony are still increasing. Colonies are evenly spaced around the island. Plumage scores varied seasonally, and males had higher scores than females. Breeding activity peaked in July-August and November-March. Conspecific interference may force poorly plumed birds to breed when environmental conditions are poor. Chick mortality was primarily f

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18

Preziosi, Richard F. "Sexual size dimorphism and selection in the waterstrider Aquarius remigis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0009/NQ30363.pdf.

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19

Schmalz-Peixoto, Karin E. von. "Factors affecting breeding in captive Carnivora." Thesis, University of Oxford, 2003. http://ora.ox.ac.uk/objects/uuid:64687fe3-f6ca-4d9b-90d8-b6f1e565711a.

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Captive carnivores pose a challenge for conservationists and institutions alike, presenting many problems that range from diseases to poor welfare and unsuccessful breeding. Available databases of captive populations are rich sources of information that can help determine which factors can affect breeding success and the real potential of these populations in conservation programmes. Some species, such as tigers Panthera tigris, seem to preserve in captivity the same reproductive parameters seen in wild animals, making captive individuals extremely useful in the research of reproductive biolog

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20

Melo, Thaise Pinto de. "Genome-wide association study of reproduction traits in Nelore cattle, including additional phenotypic information from non-genotyped animals /." Jaboticabal, 2015. http://hdl.handle.net/11449/123734.

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Orientador: Roberto Carvalheiro<br>Coorientador: Lucia Galvão de Albuquerque<br>Banca: Henrique Nunes de Oliveira<br>Banca: Idalmo Garcia Pereira<br>Resumo: Esta dissertação foi dividida em três capítulos, o primeiro é uma revisão de literatura sobre o assunto que será discutido nos capítulos seguintes. No segundo capítulo, foi realizado um estudo de associação genômica ampla para a característica idade ao primeiro parto (IPP) em gado Nelore, que objetivou: 1) avaliar se a informação fenotípica adicional dos animais não genotipados afeta o mapeamento de QTLs da IPP; avaliar, por simulação, se

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21

Melo, Thaise Pinto de [UNESP]. "Genome-wide association study of reproduction traits in Nelore cattle, including additional phenotypic information from non-genotyped animals." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/123734.

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Made available in DSpace on 2015-06-17T19:33:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-02-26. Added 1 bitstream(s) on 2015-06-18T12:48:02Z : No. of bitstreams: 1 000834416.pdf: 589713 bytes, checksum: e67aef51366f6081936855769601b405 (MD5)<br>Esta dissertação foi dividida em três capítulos, o primeiro é uma revisão de literatura sobre o assunto que será discutido nos capítulos seguintes. No segundo capítulo, foi realizado um estudo de associação genômica ampla para a característica idade ao primeiro parto (IPP) em gado Nelore, que objetivou: 1) avaliar se a informação fenotíp

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22

Gomes, Andreia Fernandes. "Clínica e cirurgia de animais de companhia e animais selvagens." Master's thesis, Universidade de Évora, 2021. http://hdl.handle.net/10174/29290.

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O presente relatório foi realizado no âmbito do estágio curricular, sendo dividido em três partes. A primeira parte é referente à casuística das atividades seguidas ao longo dos quatro meses de estágio no Hospital Veterinário de Loulé apresentada sob a forma de gráficos e tabelas sendo que, há uma separação por área clínica e as suas respetivas especialidades e por espécie animal. A segunda parte diz respeito à revisão bibliográfica cujo título é: “Reprodução de jaguares em cativeiro” no qual, são mencionadas todos os aspetos importantes relativos à espécie (anatomofisiologia, endocrinologia r

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23

Martins, Daniele dos Santos. "Morfologia do sistema reprodutor masculino da preguiça-de-coleira (Bradypus torquatus, Illiger, 1811)." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/10/10132/tde-25022008-131642/.

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Os Bichos-Preguiça são mamíferos (Classe Mammalia) da ordem Xenarthra (ou Edentata) Utilizamos nesta pesquisa preguiças-de-coleira (Bradypus torquatus) sendo seis machos e uma fêmea de diferentes faixas etárias. Estes animais foram cedidos para o Laboratório de Anatomia do Departamento de Cirurgia da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ -USP) pela Reserva Zoobotânica - Matinha Ilhéus/Bahia (Registro Ibama nº 02006.001.348/98-31), nos quais utilizamos as técnica de injeção vascular de látex (Neopreme® 650) e a injeção intra muscular de solução aqu

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24

Costa, Shirley Famelli da. "Ecologia reprodutiva e análise de viabilidade de uma população do cágado Hydromedusa maximiliani (Testudines, Chelidae) no Parque Estadual Carlos Botelho." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-26062009-150529/.

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Com o objetivo de obter dados relacionados às estratégias reprodutivas de Hydromedusa maximiliani no Parque Estadual Carlos Botelho, SP, fêmeas e jovens foram radiografados entre setembro de 2007 e dezembro de 2008. A estação reprodutiva estendeu-se de setembro a dezembro, com a ocorrência de desovas entre novembro e dezembro, tanto em 2007 como em 2008. Das 33 fêmeas radiografadas, 19 (58%) apresentaram ovos, e, dessas, apenas três (16%) reproduziram-se nos dois anos. O tamanho da ninhada variou entre 1 e 3 ovos, mas a maioria das fêmeas (90%) apresentou dois ovos. O volume da ninhada foi de

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25

Cassidy, Alice Louise Ethel Victoria. "Male quality as expressed by song and plumage in yellow warblers (Dendroica petechia) and its relationship to mate choice and reproductive success." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63785.

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26

Fabré, Mitjans Noëlle. "Comportamiento reproductor en el blenio de río (Salaria fluviatilis): aspectos relacionados con la estrategia reproductiva del macho." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/284359.

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El blenio de río (Salaria fluviatilis) es un pez de agua dulce de distribución circum-mediterránea que se encuentra amenazado en muchos de los países en los que se ha descrito. Con tal de aportar información útil para su conservación, en la presente tesis, se abordaron diferentes aspectos de comportamiento como: las estrategias reproductivas, el desarrollo embrionario en función del cuidado parental, la personalidad y la capacidad de aprendizaje. En cuanto a la estrategia reproductiva, los resultados obtenidos revelan que la ausencia de machos dominantes más grandes promueve el desarrollo en c

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27

Miranda, Flavia Regina. "Pesquisa de anticorpos contra bactérias do gênero Brucella spp, Leptospira spp, Chlamydophila spp em tamanduás-bandeira (Myrmecophaga tridactyla, Linnaeus, 1758), da RPPN SESC Pantanal, Parque Nacional da Serra da Canastra (PNSC) e Parque Nacional das Emas (PNE)." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-24072008-121253/.

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A fragilidade do tamanduá-bandeira (Myrmecophaga tridactyla) e seu visível desaparecimento de certas regiões, inclusa sua área de distribuição original mostram com clareza a necessidade de medidas que possam garantir proteção desse animal. O estudo do papel das doenças nesse aspecto constitui um eixo importante das estratégias para conservação dessa espécie, principalmente considerando-se que estudos ecológicos reconhecem as doenças como o mecanismo regulatório de populações naturais. Este trabalho objetivou avaliar a freqüência de anticorpos anti- Leptospira, anti-Brucella abortus e anti-Chla

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Muhlin, Jessica F. "Reproductive Ecology and Characterization of Population Genetic Structure of Fucus vesiculosus Linnaeus in the Northwestern Atlantic." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/MuhlinJF2007.pdf.

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29

Martins, Jorge Luis Araujo. "Criopreservação de sêmen do epididimo de gatos domésticos (felis catus) após refrigeração por 24 horas /." Botucatu : [s.n.], 2006. http://hdl.handle.net/11449/98226.

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Orientador: Maria Denise Lopes<br>Banca: Frederico Ozanan Papa<br>Banca: Jussara Tebet<br>Resumo: A análise dos efeitos da refrigeração sobre a congelabilidade da célula espermática da cauda do epidídimo de gatos domésticos foram avaliados nesse experimento. Após prévia refrigeração a 5O C por 24 horas alíquotas de sêmen foram submetidas a criopreservação e posteriormente descongeladas para análise morfofuncional. 15 animais foram submetidos a orquiectomia de conveniência e seus epidídimos foram manipulados para obtenção de amostras que foram suspensas em meio TE (TRIS/Equex/Gema de Ovo), anal

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Bang, H. Helen (He Won Helen) 1974. "The distribution of a water strider, Aquarius remigis, among habitat patches explained by sex specific dispersal strategies /." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29413.

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A survey of a natural population of Aquarius remigis, a stream dwelling water strider, living in East Turkey Creek, Arizona, USA, revealed that they were mostly found in either pairs consisting of one male and one female, or in small female biased groups. Chi-squared analysis confirmed that this finding was not due to random chance. The sex ratios were manipulated to further test this observation, that is, that the water striders would return to the most commonly observed sex ratio combinations even after being deliberately rearranged. Pairs of water striders or female biased sex ratios were o

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Southey, Katherine. "Spawning and spatial movement in the bluehead wrasse (Thalassoma bifasciatum) at Barbados, West Indies." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61036.

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This study investigates the characteristics and use of spawning sites by the bluehead wrasse Thalassoma bifasciatum in Barbados, and movements of wrasses from source reefs to proximate and isolate recipient reefs. Pair spawning rate increased with increasing projection height; group spawning rate increased with increasing proximity to the downcurrent reef edge. Daily group spawning rates, but not pair-spawning rates, were higher when daily current speeds were lower, suggesting that fertilisation rates in group spawns may be more sensitive to current speed than fertilisation rates in pair spawn

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Vantorre, Thomas. "Communication chimique et compétition lors de la reproduction chez Gastrophysa viridula, Coleoptera: Chrysomelidae." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209328.

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Parmi les modes de communication les plus exploités chez les insectes, la communication chimique figure en bonne place. D’ailleurs, la recherche moderne consacrée aux signaux chimiques émis et perçus par les individus d’une même espèce n’a de cesse de se développer depuis plus de 50 ans. A travers ce travail de thèse, nous nous sommes intéressés à ces phéromones associées au comportement sexuel de Gastrophysa viridula (Coleoptera :Chrysomelidae). Nous avons menés, dans ce cadre, plusieurs bioessais comportementaux liés pour la plupart à des analyses chimiques par chromatographie gazeuse couplé

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Mjihdi, Abdelkarim. "Capacité de reproduction de la souris et infection aiguë par Trypanosoma cruzi." Doctoral thesis, Universite Libre de Bruxelles, 2004. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211065.

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Trypanosoma cruzi est un parasite protozoaire à multiplication intracellulaire, agent de la maladie de Chagas, infectant 16 à 18 millions de personnes en Amérique latine. Il peut être transmis de la mère infectée au fœtus dans 2 à 10 % des cas, mais ses autres effets sur la gestation ont été peu étudiés. Par ailleurs, les cytokines ont des effets sur la gestation. Certaines d’entre elles, comme l’interleukine-1, l’IL-4, l’IL-5, l’IL-10, le GM-CSF et le TGF-b2, sont bénéfiques pour la gestation, tandis que d’autres, comme l’IL-2, l’IL-12, l’IFN-g et le TNF-a ont des effets nocifs sur celle-ci.

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Brand, Monica Merenza. "Reproduction criteria and meat quality of South African Black (Struthio Camelus var. Domesticus), Zimbabwean Blue (Struthio Camelus Australis) and South African Black X Zimbabwean Blue ostriches." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/1714.

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Thesis (Msc Food Sc (Food Science))--University of Stellenbosch, 2006.<br>The aim of this study is to determine the effect of crossbreeding Zimbabwean Blue (ZB) and South African Black (SAB) ostriches on the morphological, physical, chemical and sensory quality of the meat. However, it is also necessary to determine the reproductive performance of these genotypes to scientifically support decisions made in the ostrich industry. In relation to reproductive traits and body measurements influencing these traits, results from the study suggested that ZB birds are between 9 and 15% heavier tha

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Bobic, Gavrilovic Bojana. "Reproductive patterns in the domestic dog : a retrospective study, with the Drever breed as model /." Uppsala : Department of Clinical Sciences, Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/10639782.pdf.

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Sun, Pei. "The Effect of Early Rearing Experience on Adult Reproductive Behavior in Captive Giant Pandas and Spectacled Bears." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7618.

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The present study examined the relationship between early rearing experience and reproductive competence in captive adult giant pandas (Ailuropoda melanoleuca) and spectacled bears (Tremarctos ornatus). Life history information of 52 giant pandas and 34 spectacled bears were obtained from the International Studbook and by interviewing staff at institutions housing the subjects. The early rearing experience variables included duration of mother rearing, social access within 1-yr period following maternal separation, and birth origin. Correlation, Chi-square, and logistic regression analyses wer

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Carazo, Ortega Ignacio. "Comportamiento reproductivo y fisiología del lenguado senegalés, (Solea Senegalensis) en cautividad / Reproductive Behaviour and Physiology of Senegalese Sole, (Solea Senegalensis) Broodstock in Captivity." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/107945.

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En el presente trabajo de tesis doctoral se presenta y describe por primera vez el comportamiento reproductivo del lenguado senegalés (Solea senegalensis) de origen salvaje mantenido en cautividad, trabajando con un total de 15 cortejos. El cortejo del lenguado senegalés se inicia mediante una serie de contactos entre machos y hembras, seguido de una serie de comportamientos de tipo competitivo observados exclusivamente en los machos. Posteriormente un macho centra su atención sobre una determinada hembra, apoyando su cabeza sobre la zona dorsal, la aleta caudal y la gónada de la hembra, ha

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Martins, Jorge Luis Araújo [UNESP]. "Criopreservação de sêmen do epididimo de gatos domésticos (felis catus) após refrigeração por 24 horas." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/98226.

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Made available in DSpace on 2014-06-11T19:29:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-07-29Bitstream added on 2014-06-13T19:17:43Z : No. of bitstreams: 1 martins_jla_me_botfmvz.pdf: 366556 bytes, checksum: 5564f8a57d5ae434024a1843feeb124b (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>A análise dos efeitos da refrigeração sobre a congelabilidade da célula espermática da cauda do epidídimo de gatos domésticos foram avaliados nesse experimento. Após prévia refrigeração a 5O C por 24 horas alíquotas de sêmen foram submetidas a criopreservação e poster

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Salgado, Andréia Ruis. "Transferência ovariana como alternativa para a restauração das funções reprodutivas em fêmeas de camundongos irradiadas com radiação gama de Co-60." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-01062011-142844/.

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Apesar dos inúmeros grupos de pesquisa de todo o mundo investigando o câncer, esta doença tem se ampliado significativamente. No caso do câncer de ovário, a despeito dos notáveis avanços observados nos tratamentos atuais, um desafio persiste: a incapacidade da preservação de oócitos em tratamento com quimioterapia, radioterapia e/ou cirurgia, nos quais são freqüentes os efeitos colaterais tais como a perda folicular, a infertilidade, a menopausa precoce e as falências ovarianas pós-quimioterapia, decorrentes da irradiação e pós-cirurgia. Neste sentido, o transplante de tecido ovariano pode rep

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Magyara, Nora, and University of Lethbridge Faculty of Arts and Science. "Multiple mating and female choice in Richardson's ground squirrels (Urocitellus Richardsonii)." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2009, 2009. http://hdl.handle.net/10133/1258.

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I studied the mating behaviour of Richardson’s ground squirrels (Urocitellus richardsonii) in 2007 and 2008, near Picture Butte, AB, Canada with the goals of evaluating multiple paternities within litters, sperm competition, and female mate choice. Eleven microsatellites and use of behavioural data to eliminate males who could not be putative sires based on their spatial and temporal remoteness from estrous females enabled exclusive assignment of paternity to 82.8% of 598 offspring with known maternity. The frequency of multiple paternities (26.4%, n=87 litters) in my population was lower than

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Chan, Tin-Yam. "The role of male competition and female choice in the mating success of a Lek-breeding Southern African Cichlid fish Pseudocrenilabrus Philander (Pisces: Cichlidae)." Thesis, Rhodes University, 1988. http://hdl.handle.net/10962/d1002049.

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A lek-breeding cichlid fish Pseudocrenilabrus philander was studied experimentally. Females in choice-chamber experiments showed no active choice for male size and colour, or for other male attributes, but preferred males which courted most actively. In a laboratory lek, the significant determinants of the strongly skewed mating success in males were territory size, side-shake and female chasing frequency. Together these three variables explained 79% of the variation in male mating success, with territory size alone accounting for 75% of the variation and the other two variables each accountin

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Martin, Meghan S. "The Role of Mate Preference and Personality on Reproductive Performance in an Ex-Situ Conservation Breeding Program for the Giant Panda (Ailuropoda melanoleuca)." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/2096.

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Successful captive-breeding and re-introduction programs must have the ability to breed a surplus of genetically suitable animals for release into the wild. Unfortunately, many individuals in captive breeding programs often do not reproduce even when they are apparently healthy and presented with genetically appropriate mates. Mate choice can affect multiple parameters of reproductive sperformance, including mating success, offspring production, survival, and fecundity. We investigated the role of mate preference and personality on the reproductive performance of male and female giant pandas (

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Villarroel, Morris Ricardo. "Copulatory behaviour and paternity in solitary- and colony-nesting kestrels." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34476.

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In this thesis, I analysed the mating behaviour of the solitary-nesting American kestrel (Falco sparverius) in southern Quebec (Canada) and the colony-nesting lesser kestrel (F. naumanni) in Aragon (Spain). DNA fingerprinting of 26 families of lesser kestrels revealed that 3.4% of nestlings were extra-pair, which may have arisen through either extra-pair copulation or mate replacement. Two nestlings in two different nests were also the result of intraspecific brood parasitism. DNA fingerprinting of 21 American kestrel families showed that all the nestlings in two nests were extra-pair (10% ext

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Urbani, Nicola. "Microsatellite DNA analysis of the mating system during the first breeding period of the female snow crab Chionoecetes opilio (Brachyura, Majidae)." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35838.

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In order to study sperm competition and mating dynamics in the snow crab Chionoecetes opilio, a genomic library was established with the goal of identifying highly polymorphic microsatellite markers. Six pairs of DNA primers were designed to amplify markers Cop3-4, Cop4-1, Cop5, Cop10, Cop24-3 and Cop111 by the polymerase chain reaction (PCR). All markers produced patterns as expected from single loci inherited in a mendelian fashion, except for Cop5 which revealed a multi-locus banding pattern. The cross-amplification of the six loci in seven additional crabs species revealed DNA polymorphism

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Belanger, Rachelle Marie. "An Interdisciplinary Investigation of the Role of Crayfish Major Chelae in the Discrimination of Conspecific Odours: from Morphology to Behaviour." Bowling Green, Ohio : Bowling Green State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1182174766.

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Brown, Gordon S. "Sperm competition and male forceps dimorphism in the European earwig Forficula auricularia (Dermaptera: Forficulina)." Thesis, St Andrews, 2007. http://hdl.handle.net/10023/409.

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Ash, Hayley. "Assessing the welfare of laboratory-housed marmosets (Callithrix jacchus) : effects of breeding and infant rearing background." Thesis, University of Stirling, 2014. http://hdl.handle.net/1893/21794.

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The common marmoset is the most frequently used New World primate in laboratory research and testing. In the UK, their use is strictly controlled by the Animals (Scientific Procedures) Act, which is underpinned by the principles of humane science: Replacement, Reduction and Refinement. Despite their use, there are a number of problems associated with the breeding of marmosets, including low dam longevity and increasing litter sizes. Large litters have led to high infant mortality and the need for human intervention to improve infant survival, which involves removal from the family for substant

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Escobar, Aguirre Sebastián. "Estudio del sistema kisspeptina y su papel en el inicio de la pubertad de la lubina europea (Dicentrarchus labrax): Efecto de la restricción calórica en machos." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/333342.

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En esta tesis doctoral se estudia el efecto de una dieta de restricción calórica de mantenimiento a largo plazo (14 meses), en machos de lubina prepúberes, sobre el inicio y desarrollo de la pubertad. Para ello se consideró el papel que los sistemas kisspeptina/GnRH juegan en el cerebro y la gónada de esta especie en términos reproductivos. Nuestros resultados evidencian que tanto las neuronas que expresan kiss1 y kiss2 como sus receptores se encuentran localizadas en zonas hipofisiotrópicas que regulan procesos relacionados con la reproducción. En particular, las células kiss1 y kiss2 se dist

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Lombardi, Giorgio Colombo. "Variation in breeding systems, floral morphology and nectar properties in three co-occurring Erica species with contrasting pollination syndromes." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018567.

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The genus Erica is the most species rich in the Cape Floristic Kingdom, yet there are limited data on the various flower-pollinator interactions and breeding systems for the majority of these species. Until recently research has focussed on predictive floral traits, including flower shape, length of corolla and corolla opening to identify likely pollinators in this genus. Field observations provide an empirical test of such predictions. This study investigated three species of Erica and compared their pollination and breeding systems and floral biology. Research, including field experiments an

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Bishop, Amy Ruth. "Age, growth, reproduction and sexual dimorphism of the striped dolphin, Stenella coeruleoalba, off the south-east coast of southern Africa." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1011600.

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The striped dolphin, Stenella coeruleoalba, is an oceanic dolphin found worldwide in tropical to warm temperate waters. Globally populations are threatened through direct fishing, bycatch and pollution. Little is known about the life history of this species in South African waters and it is currently listed as ‘Data Deficient’ by the International Union for Conservation of Nature (IUCN). Critical to the conservation and management of this species is an understanding of basic life history parameters. For the present study, metadata and tissues from 101 stranded S. coeruleoalba along the south-e

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