• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 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.
1

Eletroejaculação em caititus (Tayassu tajacu): características seminais pré e pós-refrigeração

KAHWAGE, Priscila Reis 20 May 2009 (has links)
Submitted by Edisangela Bastos (edisangela@ufpa.br) on 2014-06-09T18:26:34Z No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_EletroejaculacaoCaititusCaracteristicas.pdf: 2929601 bytes, checksum: 37f332b144d3af9572950f1922dcbe72 (MD5) / Approved for entry into archive by Ana Rosa Silva (arosa@ufpa.br) on 2014-07-02T12:50:20Z (GMT) No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_EletroejaculacaoCaititusCaracteristicas.pdf: 2929601 bytes, checksum: 37f332b144d3af9572950f1922dcbe72 (MD5) / Made available in DSpace on 2014-07-02T12:50:20Z (GMT). No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_EletroejaculacaoCaititusCaracteristicas.pdf: 2929601 bytes, checksum: 37f332b144d3af9572950f1922dcbe72 (MD5) Previous issue date: 2009 / CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico / Para implementar um sistema de criação de Tayassu tajacu é necessário estudar sua biologia reprodutiva, principalmente os aspectos referentes aos machos. O objetivo do trabalho foi testar a eficiência da eletroejaculação para obtenção de sêmen, descrever o perfil seminal e testar a capacidade de conservação de gametas masculinos sob refrigeração. Foram selecionados 11 machos adultos (76,8±37,8 meses, 19,5±2,7 kg) para a avaliação da biometria testicular, e 8 deles foram submetidos à eletroejaculação (45±13 estímulos, 12 volts, 3 segundos/pulso e descanso de 3 segundos). As amostras colhidas foram avaliadas quanto às características físicas (aspecto, cor, volume total, concentração, pH, motilidade e vigor espermáticos) e características morfológicas (viabilidade e defeitos espermáticos). As amostras foram divididas e diluídas em BTS (diluidor de curta duração) ou X-Cell® (longa duração) e mantidas sob refrigeração a 17º C. As amostras foram avaliadas imediatamente após a diluição (T0), após 24 horas (T24) e 48 horas (T48) de resfriamento. Os animais apresentaram testículo esquerdo com comprimento de 3,8±0,4 cm, largura de 2,6±0,3 cm e consistência de 2,3±0,2, e testículo direito com 3,8±0,5 cm de comprimento, 2,7±0,3 cm de largura e 2,3±0,2 de consistência. A taxa de sucesso obtida com a eletroejaculação foi de 75,21%. O sêmen apresentou: volume 0,81±0,86 mL, concentração 137,44±153 x 106 sptz/mL, pH 7,92±0,73, motilidade 52,66±28,79%, vigor 2,2±0,8, viabilidade 55,84±28,55%, defeitos maiores 22,87±12,93%, defeitos menores 9,11±5,88% e defeitos totais 31,52±13,81%. Não houve variações expressivas na produção e qualidade seminal ao longo dos meses do ano. Não houve diferença significativa entre os diluidores testados, com relação à capacidade de manutenção dos parâmetros seminais durante o período de estocagem, havendo influência significativa do tempo de armazenamento (P<0,05). Nos tempos T0, T24 e T48, o sêmen diluído em BTS apresentou motilidade espermática média de 56,1±17,6 %, 17,9±23,3 % e 7,7 ±19,6%, a viabilidade espermática média de 60,2±17,2%, 27,9±23,8% e 11,7±20,2%, e defeitos totais médios de 28,1±10,8%, 37,5±12,1% e 41,28±11,4%., respectivamente. Amostras seminais diluídas em X-Cell® apresentaram motilidade média de 54,2±22,1%, 27,0±28,0% e 14,0±24,2%, viabilidade média de 57,8±21,7%, 33,0±26,9% e 19,9±25,6% e defeitos totais médios de 30,8±11,2%, 41,2±13,4% e 44,2±14,4% nos três tempos avaliados. Assim, a eletroejaculação é eficiente e segura para a obtenção de ejaculados de caititus, o sêmen produzido possui potencial para estocagem, e pode ser conservado sob 17ºC até 24 horas. / Studies concerning reproductive biology of collared peccary (Tayassu tajacu) are worthy to improve creation system. The aims of this research were testing electroejaculation as safety method to collect semen; describing the seminal profile along the year; and testing the capacity for spermatozoa storage under refrigeration. Eleven adults males (76.8±37.8 months, 19.5±2.7 kg) were selected for the measurements of testicular length and width. Eight adults males were used to semen collection (45±13 stimuli, 12 volt, 3 seconds; and resting pulse of 3 seconds). Semen samples were evaluated for physic characteristics (appearance, color, volume, sperm concentration, pH, sperm motility and vigor), and morphological characteristics (sperm viability and sperm defects). Semen samples were split and diluted in two different extenders: BTS (short-term storage) or X-Cell ® (long-term storage). Diluted semen samples were maintained under refrigeration at 17ºC. The samples were evaluated immediately after dilution (T0), after 24 hours (T24) and 48 hours (T48) of cooling. Animals presented 3.8±0.4 cm on left testicles length, 2.6±0.3 cm on left testicles width and left testicles consistency of 2.3±0.2; right testicles presented 3.8±0.5 cm length, 2.7±0.3 cm width and 2.3±0.2 for consistency. The success rate obtained with electroejaculation was 75.21%. The seminal features observed were: volume 0.81±0.86 mL, concentration 137.44±153 x 106 sptz/mL, pH 7.92±0.73, motility 52.66±28.79%, vigor 2.2±0.8, viability 55.84±28.55%, primary abnormalities 22.87±12.93%, secondary abnormalities 9.11±5.88% and total abnormalities 31.52±13.81%. There were no significant changes in production and quality semen along the months of the year. There was no significant difference between extenders tested concerning to maintenance capacity of seminal parameters during the storage period of storage; however, significant influence of storage time was observed (P<0.05). Diluted semen in BTS presented at T0, T24 and T48, average sperm motility of 56.1±17.6%, 17.9±23.3% and 7.7±19.6%, the average sperm viability was 60.2±17.2%, 27.9±23.8% and 11.7±20.2%, and the average total defects were 28.1±10.8%, 37.5±12.1% and 41.28±11.4%, respectively. Semen samples diluted in X-Cell® presented at T0, T24 and T48 average motility of 54.2±22.1%, 27.0±28.0% and 14.0±24.2%, average viability of 57.8±21.7%, 33.0±26.9% and 19.9±25.6% and total defects were 30.8±11.2%, 41.2±13.4% and 44.2±14.4%. Thus, electroejaculation is an effective and safe method to obtain seminal samples from collared peccary, the semen of collared peccary has potential for storage and can be maintained under 17º C up to 24 hours.

Page generated in 0.0525 seconds