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Recto-vaginal artificial insemination using digital rectal palpation technique in Red Sokoto goat. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Influence of Season and Liquid Storage at 16 °C on Beni Arouss Bucks' Semen Quality. Animals (Basel) 2020; 10:ani10111986. [PMID: 33137921 PMCID: PMC7692028 DOI: 10.3390/ani10111986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/09/2020] [Accepted: 10/26/2020] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Goat production plays an important economic and social role in Northern Moroccan farming. Beni Arouss is an autochthonous North Moroccan goat breed. The use of artificial insemination can largely contribute to optimised preservation and dissemination of valuable traits of this breed and lead to improved productivity. During liquid storage, the stability of semen good quality remains crucial in order to provide greater flexibility between the artificial insemination center and farms where the insemination of does needs to be performed. The study aims to assess the effect of storage and season of the year on fresh semen of Beni Arouss goats. Every month, ejaculates were collected from bucks and were extended and stored at 16 °C for 24 h. Semen motility, viability and normal morphology were assessed at 0, 4, 8 and 24 h after collection. As expected, these parameters showed a significant reduction within 24 h of storage and during all seasons. However, semen collected in summer maintained a better quality after 24 h of storage at 16 °C than semen collected during the other periods. Therefore, the storage ability of Beni Arouss bucks’ semen stored at 16 °C was higher during the summer. Abstract The study aimed at determining the effect of storage and season on fresh semen of Beni Arouss goats. Ejaculates were collected at monthly intervals from seven mature bucks and were extended at a final concentration of 800 × 106 spermatozoa. ml-1 and stored at 16 °C for 24 h. Semen motility, viability and normal morphology were assessed at 0, 4, 8 and 24 h after collection. Motility and normal morphology parameters were recorded using computer-assisted sperm analysis (CASA) and viability was analyzed using eosin–nigrosin staining. As expected, motility, viability and normal morphology parameters showed a significant reduction within 24 h of storage and during all seasons (p < 0.05). However, semen collected in summer maintained a better quality after 24 h of storage at 16 °C than semen collected during the other periods (p < 0.05). In conclusion, the storage ability of Beni Arouss bucks’ semen stored at 16 °C was significantly higher during the summer.
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Effect of Sperm Concentration and Storage Temperature on Goat Spermatozoa during Liquid Storage. BIOLOGY 2020; 9:biology9090300. [PMID: 32961716 PMCID: PMC7564667 DOI: 10.3390/biology9090300] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/14/2020] [Accepted: 09/17/2020] [Indexed: 12/31/2022]
Abstract
The use of cooled semen is relatively common in goats. There are a number of advantages of cooled semen doses, including easier handling of artificial insemination (AI) doses, transport, more AI doses per ejaculate, and higher fertility rates in comparison with frozen AI doses. However, cooled semen has a short shelf life. The objective of this study was to examine the effect of temperature and sperm concentration on the in vitro sperm quality during liquid storage for 48 h, including sperm motility and kinetics, response to oxidation, mitochondrial membrane potential (MMP) and DNA fragmentation in goats. Three experiments were performed. In the first, the effects of liquid preservation of semen at different temperatures (5 °C or 17 °C), durations (0, 24 and 48 h) and sperm concentrations (250 × 106 sperm/mL (1:2 dilution rate), 166.7 × 106 sperm/mL (1:3 dilution rate) or 50 × 106 sperm/mL (1:10 dilution rate)) on sperm motility and kinetics were studied. In the second experiment, the effect of temperature, sperm washing and concentration on sperm motility and DNA fragmentation was studied. Finally, the effect of sperm concentration and duration of storage at 5 °C on sperm motility, response to oxidative stress and MMP was examined. We found that refrigerated liquid storage of goat sperm impaired sperm quality, such as motility, MMP and response to oxidation, as storage time increased; however, sperm DNA fragmentation index was not significantly affected. Liquid storage at 5 °C preserved higher total motility than at 17 °C. Moreover, we observed that the reduction of sperm concentration below 500 × 106 sperm/mL did not seem to improve the quality of spermatozoa conserved in milk-based extender in the conditions tested.
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Silva RAJA, Batista AM, Arruda LCP, de Souza HM, Nery IHDAV, Gomes WA, Soares PDC, Silva SV, Guerra MMP. Concentration of soybean lecithin affects short-term storage success of goat semen related with seminal plasma removal. Anim Reprod 2019; 16:895-901. [PMID: 32368269 PMCID: PMC7189563 DOI: 10.21451/1984-3143-ar2019-0012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The objective of this study was to investigate the need of seminal plasma removal for short-term cooling of buck semen in soybean lecithin (SL) based extender. Each pool was divided equally, and one half was subjected to centrifugation to remove seminal plasma (SP-), while the other half remained with seminal plasma (SP+). Then, both SP+ and SP- samples were diluted in two SL extenders (extender A = 1% SL; extender B = 2% SL), cooled to 5ºC and stored for 48 hours. The sperm kinetics, evaluated by CASA, and plasma membrane integrity (PMI), acrosomal integrity (ACI) and high mitochondrial membrane potential (HMMP), evaluated by epifluorescence microscopy, were determined within five minutes after reaching 5°C (T0), as well as after 24 (T24) and 48 (T48) hours of storage. Interactions (seminal plasma
vs.
extender
vs.
time;) were observed for all variables assessed. Total and progressive motility and other variables of sperm kinetics decreased after 24 hours of cooling in the SP+ group, and after 48 hours of storage, these same variables were lower in SP+/B compared to SP-/B groups. Furthermore, SP+ reduced PMI (extender B, T48), HMMP (A and B extenders, T48) and ACI (extender A, T0) compared to SP- samples. The interactions between seminal plasma and soybean lecithin phospholipids seemed to occur in a time-dependent manner. It was concluded that the removal of seminal plasma improves the quality of goat semen that was cooled in a soybean lecithin-based extender, especially when using 2% soybean lecithin.
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Affiliation(s)
- Robespierre Augusto Joaquim Araújo Silva
- Universidade Federal Rural de Pernambuco Laboratório de Andrologia Departamento de Medicina Veterinária RecifePE Brasil Universidade Federal Rural de Pernambuco, Laboratório de Andrologia, Departamento de Medicina Veterinária, Recife, PE, Brasil
| | - André Mariano Batista
- Universidade Federal Rural de Pernambuco Laboratório de Andrologia Departamento de Medicina Veterinária RecifePE Brasil Universidade Federal Rural de Pernambuco, Laboratório de Andrologia, Departamento de Medicina Veterinária, Recife, PE, Brasil
| | - Lúcia Cristina Pereira Arruda
- Universidade Federal Rural de Pernambuco Laboratório de Andrologia Departamento de Medicina Veterinária RecifePE Brasil Universidade Federal Rural de Pernambuco, Laboratório de Andrologia, Departamento de Medicina Veterinária, Recife, PE, Brasil
| | - Helder Melo de Souza
- Universidade Federal Rural de Pernambuco Laboratório de Andrologia Departamento de Medicina Veterinária RecifePE Brasil Universidade Federal Rural de Pernambuco, Laboratório de Andrologia, Departamento de Medicina Veterinária, Recife, PE, Brasil
| | - Igor Henrique de Azevedo Valença Nery
- Universidade Federal Rural de Pernambuco Laboratório de Andrologia Departamento de Medicina Veterinária RecifePE Brasil Universidade Federal Rural de Pernambuco, Laboratório de Andrologia, Departamento de Medicina Veterinária, Recife, PE, Brasil
| | - Wilton Arruda Gomes
- Universidade Federal Rural de Pernambuco Laboratório de Andrologia Departamento de Medicina Veterinária RecifePE Brasil Universidade Federal Rural de Pernambuco, Laboratório de Andrologia, Departamento de Medicina Veterinária, Recife, PE, Brasil
| | - Pierre de Castro Soares
- Universidade Federal Rural de Pernambuco Laboratório de Doenças Metabólicas e Nutricionais de Ruminantes Departamento de Medicina Veterinária RecifePE Brasil Universidade Federal Rural de Pernambuco, Laboratório de Doenças Metabólicas e Nutricionais de Ruminantes, Departamento de Medicina Veterinária, Recife, PE, Brasil
| | - Sildivane Valcácia Silva
- Universidade Federal da Paraíba Centro de Biotecnologia João PessoaPB Brasil Universidade Federal da Paraíba, Centro de Biotecnologia, João Pessoa, PB, Brasil
| | - Maria Madalena Pessoa Guerra
- Universidade Federal Rural de Pernambuco Laboratório de Andrologia Departamento de Medicina Veterinária RecifePE Brasil Universidade Federal Rural de Pernambuco, Laboratório de Andrologia, Departamento de Medicina Veterinária, Recife, PE, Brasil
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Arrébola F, Sánchez M, López MD, Rodríguez M, Pardo B, Palacios C, Abecia JA. Effects of weather and management factors on fertility after artificial insemination in Florida goats: A ten-year study. Small Rumin Res 2016. [DOI: 10.1016/j.smallrumres.2016.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yotov SA, Velislavova DV, Dimova LR. Pregnancy rate in Bulgarian White milk goats with natural and synchronized estrus after artificial insemination by frozen semen during breeding season. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2016. [DOI: 10.1016/j.apjr.2016.01.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Arrébola F, Palacios C, Gil MJ, Abecia JA. Management and meteorological factors affect fertility after artificial insemination in Murciano-Granadina goats. ANIMAL PRODUCTION SCIENCE 2016. [DOI: 10.1071/an15176] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Over 6 years, 2004 artificial inseminations (AI) were documented from 13 goat farms. We quantified the effect on fertility rate of management factors (farm, year, month, timing and order of insemination, dose of progestagen, prostaglandin, equine chorionic gonadotrophin and prostaglandin doses, age, technician, problems at AI, body condition and buck) and meteorological conditions at AI (mean, maximum and minimum temperatures, mean relative humidity, mean solar radiation, and total rainfall). Meteorological variables were converted to categorical variables to quartiles and deciles. Overall fertility was 56%. Each of the management factors had a significant (P < 0.05) effect on fertility. Non-pregnant goats differed significantly in most of the meteorological variables. Successful inseminations were associated with significantly (P < 0.001) higher mean, maximum and minimum temperatures, and solar radiation, and lower relative humidity, and rainfall, than were failed inseminations. Fertility rates of the highest and lowest deciles were significantly different for each of the meteorological variables. Inseminations performed when meteorological values were in the highest decile of mean (62%), maximum (61%) and minimum temperature (60%), and solar radiation (59%), and the lowest of relative humidity (61%) and rainfall (57%) had a significantly (P < 0.0001) higher proportion of does that became pregnant than when meteorological values were within the opposite decile (47%; 34%; 55%; 46%; 45%, and 43%, respectively). In conclusion, management and meteorological factors affected the success of AI in goats. Although technical factors can be controlled, it remains to be determined whether scheduling the dates of insemination based on forecasted temperatures can improve the success of AI.
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Arrebola F, González O, Torres R, Abecia JA. Artificial insemination in Payoya goats: factors affecting fertility. ANIMAL PRODUCTION SCIENCE 2014. [DOI: 10.1071/an13138] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The present study was conducted to determine the effect of different factors on pregnancy rate after artificial insemination (AI) with refrigerated and frozen semen in Payoya goats reared under commercial farm conditions. A total of 820 goats, belonging to 10 farms, was used. The total number of studied inseminations was 1384 over a 4-year period. Factors considered in the study were year, farm, month of AI, age of the goat at AI, dose of progestagen, eCG dose, buck, type of semen (refrigerated or frozen), technician, number of goats to be inseminated (group size), incidences at AI (problems, no problems, trans-cervical insemination), distance from semen collection to farm, number of previous kidding, kidding–AI interval, and milk production. The variable studied was fertility, expressed as successful kidding. Mean fertility was 59%. Six (farm, age, group size, transcervical AI, number of kidding and milk production) of the 15 factors studied presented a significant (P < 0.05) effect on fertility after AI. Our results demonstrated that it is difficult to control all the critical aspects of AI programs at the farm level. These factors should be controlled and the variations that could compromise the chance of being pregnant must be known by technicians. The good fertility results obtained during the non-breeding season emphasise the implementation of this technique so as to improve the competitiveness of the dairy Payoya breed flocks.
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Shi L, Ren Y, Zhou H, Hou G, Xun W, Yue W, Zhang C, Yang R. Effect of rapid freezing-thawing techniques on the sperm parameters and ultrastructure of Chinese Taihang black goat spermatozoa. Micron 2013; 57:6-12. [PMID: 24268840 DOI: 10.1016/j.micron.2013.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 09/17/2013] [Accepted: 09/17/2013] [Indexed: 10/26/2022]
Abstract
Supercooling sperm in liquid nitrogen vapour is a feasible and economic technique for the practical production. The study aimed to reveal the negative effects of this rapid freezing and thawing processes on Taihang black goat spermatozoa and to find out the changing of spermatozoa motility and ultrastructure by using CASA and TEM. Qualified semen samples, which collected from twenty Chinese Taihang black goats using artificial vagina were pooled and investigated the kinematics parameters and ultrastructural morphology. The results showed that freezing-thawing caused a significant reduction in the spermatozoon total motility (P<0.001), in rapid and medium cell numbers (P<0.001) and motility parameters (VAP, VSL, VCL, ALH and BCF) (P<0.01). Immotile spermatozoa number was increased significantly after freezing-thawing (P<0.001). In the ultrastructural analysis, the shape with a sperm nucleus characterized by ruptures, bend and deformity was observed. The plasma membranes were broken, and nucleoplasm erupted. The mitochondria in the middle piece were disturbed by partial absence or additional accumulations. Swelling, coiling, vacuolization and structural disorganization of mitochondria were also observed. In conclusion, Freezing-thawing procedure has a detrimental effect on motility, membrane integrity and mitochondria of goat spermatozoa. Transmission electron microscopy provides an intuitive observation to investigate deformity spermatozoa.
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Affiliation(s)
- Liguang Shi
- Tropical Crop Genetic Resource Research Institute, Chinese Academy of Tropical Agricultural Sciences (CATAS), Danzhou, Hainan 571737, PR China; College of Animal Sciences and Veterinary Medicines, Shanxi Agricultural University, Taigu, Shanxi 030801, PR China
| | - Youshe Ren
- College of Animal Sciences and Veterinary Medicines, Shanxi Agricultural University, Taigu, Shanxi 030801, PR China
| | - Hanlin Zhou
- Tropical Crop Genetic Resource Research Institute, Chinese Academy of Tropical Agricultural Sciences (CATAS), Danzhou, Hainan 571737, PR China
| | - Guanyu Hou
- Tropical Crop Genetic Resource Research Institute, Chinese Academy of Tropical Agricultural Sciences (CATAS), Danzhou, Hainan 571737, PR China
| | - Wenjuan Xun
- Tropical Crop Genetic Resource Research Institute, Chinese Academy of Tropical Agricultural Sciences (CATAS), Danzhou, Hainan 571737, PR China.
| | - Wenbin Yue
- College of Animal Sciences and Veterinary Medicines, Shanxi Agricultural University, Taigu, Shanxi 030801, PR China
| | - Chunxiang Zhang
- College of Animal Sciences and Veterinary Medicines, Shanxi Agricultural University, Taigu, Shanxi 030801, PR China
| | - Rujie Yang
- College of Animal Science and Veterinary Medicine, Taiyuan, Shanxi 030024, PR China
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Palacín I, Yániz J, Fantova E, Blasco M, Quintín-Casorrán F, Sevilla-Mur E, Santolaria P. Factors affecting fertility after cervical insemination with cooled semen in meat sheep. Anim Reprod Sci 2012; 132:139-44. [DOI: 10.1016/j.anireprosci.2012.05.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 05/04/2012] [Accepted: 05/05/2012] [Indexed: 01/29/2023]
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12
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Batista M, Niño T, Santana M, Alamo D, Castro N, Reyes R, González F, Cabrera F, Gracia A. Influence of the preservation temperature (37, 20, 4, -196°C) and the mixing of semen over sperm quality of Majorera bucks. Reprod Domest Anim 2011; 46:281-8. [PMID: 20565698 DOI: 10.1111/j.1439-0531.2010.01659.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This study assessed the effect of different semen storage temperatures and the influence of semen pooling in semen viability. In experiment 1, semen samples (n = 30) of five Majorera bucks were individually processed [Individual semen (IS)] and after the first dilution (Tris-yolk extender), semen-diluted aliquots from each male were pooled semen (PS). Thereafter, semen samples (IS and PS) were preserved as fresh semen (37 and 20°C), chilled semen (4°C) and frozen semen. Sperm motility and the percentage of abnormal sperm cells and intact membrane acrosomes were defined. Semen preservation at 20 and 4°C did not modify the quality of spermatozoa for the first 24 h, but the conservation at 37°C caused a dramatic fall in the semen motility from 12 h onwards. Furthermore, the longevity of frozen-thawed semen was limited to 4-6 h. No differences were observed in semen parameters when PS was compared with semen from individual males in any of the preservation protocols assessed. In experiment 2, 120 goats were distributed in four experimental groups: in group fresh individual semen (FIS, n = 30) and group frozen-thawed individual semen (FTIS, n = 30), does were transcervically inseminated with fresh semen and frozen-thawed semen from each individual male, respectively, and in group fresh pooled semen (FPS, n = 30) and group frozen-thawed pooled semen (FTPS, n = 30), goats were transcervically inseminated with FPS and FTPS, respectively. The kidding rate was very close in the FIS and FPS groups (70.0% and 73.7%, respectively), and no significant differences were observed in the fertility rate between FTIS and FTPS. The results of this study confirmed that semen samples may be preserved satisfactorily for 24 h both at 20 and 4°C. In addition, the mixture of semen of different bucks did not significantly modify the semen parameters when compared with semen from individual males.
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Affiliation(s)
- M Batista
- Obstetrics and Reproduction Animal Science, Faculty of Veterinary of Las Palmas, Transmontaña S/n, Arucas, Spain.
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Nordstoga AB, Söderquist L, Ådnøy T, Paulenz H. Fertility Results after Vaginal Deposition of Frozen-Thawed Buck Semen Diluted with Two Different Extenders Using One- or Two-Step Procedures. Reprod Domest Anim 2011; 46:82-6. [DOI: 10.1111/j.1439-0531.2010.01586.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Vaginal deposition of frozen-thawed semen in Norwegian Dairy goats: Comparison of single and double insemination with equal total number of spermatozoa. Theriogenology 2010; 74:895-900. [DOI: 10.1016/j.theriogenology.2010.04.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Revised: 04/09/2010] [Accepted: 04/11/2010] [Indexed: 11/22/2022]
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Batista M, Niño T, Alamo D, Castro N, Santana M, González F, Cabrera F, Gracia A. Successful artificial insemination using semen frozen and stored by an ultrafreezer in the Majorera goat breed. Theriogenology 2009; 71:1307-15. [DOI: 10.1016/j.theriogenology.2008.12.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Revised: 12/18/2008] [Accepted: 12/29/2008] [Indexed: 10/21/2022]
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16
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Salvador I, Yániz J, Viudes-de-Castro MP, Gómez EA, Silvestre MA. Effect of solid storage on caprine semen conservation at 5°C. Theriogenology 2006; 66:974-81. [PMID: 16616337 DOI: 10.1016/j.theriogenology.2006.02.042] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2005] [Revised: 02/20/2006] [Accepted: 02/26/2006] [Indexed: 11/18/2022]
Abstract
In this work, we investigated the effect of storage in solid-phase extender on buck semen conserved at 5 degrees C. Furthermore, we studied the effect of addition of cysteine to the extender and the washing of seminal plasma on sperm survival. In Experiment 1, milk-based extender (M) was used as a control to study the effect of solid media storage (G) and cysteine supplementation (C), and the combination of both (GC), on in vitro sperm survival of washed and non-washed semen, conserved up to 72 h at 5 degrees C. Motility, acrosome integrity (NAR) and hypo-osmotic swelling tests (HOST) were evaluated to assess in vitro sperm survival. In Experiment 2, an artificial insemination (AI) field trial was performed to compare G versus M. Solid media (G) maintained motility of spermatozoa during storage higher than any other extender (67% G versus 62% GC; 61% M and 59% C; P<0.05), but there was no difference in NAR or HOST between extenders (P>0.05). No improvement in sperm viability was obtained by addition of cysteine to the media. Washing of semen improved motility (65% versus 60%; P<0.05), NAR (70% versus 64%; P<0.05) and HOST (37% versus 28%; P<0.05). No significant differences in fertility were obtained between G and M extenders (47% versus 41%; P>0.05). In conclusion, washing of semen and dilution in gelatin-supplemented milk extender (solid storage) appears to be a successful method for goat semen storage at 5 degrees C.
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Affiliation(s)
- I Salvador
- Centro de Investigación y Tecnología Animal, Instituto Valenciano de Investigaciones Agrarias (CITA-IVIA), Moncada, Valencia, Spain
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Salvador I, Viudes-de-Castro MP, Bernacer J, Gómez EA, Silvestre MA. Factors Affecting Pregnancy Rate in Artificial Insemination with Frozen Semen During Non-Breeding Season in Murciano-Granadina Goats: a Field Assay. Reprod Domest Anim 2005; 40:526-9. [PMID: 16324078 DOI: 10.1111/j.1439-0531.2005.00624.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
An artificial insemination programme was carried out to study the effect of factors such as depth of semen deposition, inseminator skill, farm, sire and expression of oestrus on pregnancy rate in Murciano-Granadina (MG) goats during non-breeding season and using frozen semen. Frozen-thawed semen from six males was applied by three technicians to inseminate a total of 551 goats in 17 farms distributed throughout the Mediterranean area of Spain. Pregnancy rate was determined at 6 weeks after insemination by transabdominal ecography. Overall pregnancy rate was 57%. Farm and depth of semen deposition affected pregnancy rate, whereas the sire and the technician had no effect. The deeper the semen was deposited in the genital tract, the higher was the rate of pregnancy obtained, being greater when the catheter reached the uterus. In spite of the relevant difference observed (48.2% vs 59.0%), pregnancy rate of females not coming into oestrus until 30 h after sponge removal was not significantly different, compared with those showing oestrus during the OD procedure. In conclusion, our field assay data on AI in MG goat with frozen-thawed semen showed that post-cervical insemination presented significantly greater pregnancy rate in comparison to when semen is deposited in the vagina or in the caudal part of the cervix.
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Affiliation(s)
- I Salvador
- Centro de Investigación y Tecnología Animal, Instituto Valenciano de Investigaciones Agrarias (CITA-IVIA), Ctra. Náquera-Moncada Km. 4,5, 46113 Moncada, Valencia, Spain
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Khalifa TAA, El-Saidy BE. Pellet-freezing of Damascus goat semen in a chemically defined extender. Anim Reprod Sci 2005; 93:303-15. [PMID: 16169690 DOI: 10.1016/j.anireprosci.2005.08.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2005] [Revised: 07/14/2005] [Accepted: 08/11/2005] [Indexed: 11/21/2022]
Abstract
During the breeding season of goats (12 bucks and 64 does) in Egypt, five experiments were conducted using a chemically defined cryoextender (CDE) to investigate: (1) the influence of rates of semen dilution (1:2, 1:4 and 1:19) and methods of thawing of frozen semen pellets (dry thawing versus wet thawing) on sperm progressive motility (SPM), sperm acrosome abnormalities (SAA) and rate of lipid peroxidation in semen as measured by malonaldehyde (MAL) production, and (2) the effect of insemination of does in natural (n = 38) and cloprostenol-synchronized (n = 26) estrus with frozen semen on their kidding rates and prolificacy. Semen (two successive ejaculates/buck) was collected twice a week via an AV and only ejaculates of >2500 x 10(6) sperm/ml and 70% SPM were diluted in one step at 30 degrees C with the CDE, cooled to 5 degrees C over a 4h-period, frozen in the form of 0.30 ml pellets and stored in liquid nitrogen for 72 h. The results revealed that post-thaw SPM of semen diluted at a rate of 1:4 was significantly (P < 0.01) higher than that of semen diluted at the other rates. Dilution of semen at a rate of 1:19 (< or =151 x 10(6) sperm/ml) not only minimized (P < 0.01) pre-freeze and post-thaw SPM, but also augmented (P < 0.01) pre-freeze and post-thaw rates of lipid peroxidation as evidenced by the high level of MAL production and the ability of antioxidants (1mg/ml EDTA, 200 U/ml bovine liver catalase, 0.61 mg/ml reduced glutathione and 0.11 mg/ml sodium pyruvate) to restore (P < 0.01) pre-freeze and post-thaw SPM. Frozen semen pellets exposed to dry thawing had a greater percentage of SPM (P < 0.01) as well as lower values of SAA and MAL (P < 0.01) than those exposed to wet thawing. Although the kidding rates did not vary significantly among does in natural (55.26%) and synchronized (53.85%) estrus, a higher (P < 0.05) prolificacy was obtained after their insemination in natural (1.81+/-0.16) rather than in synchronized (1.22+/-0.11) estrus.
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Affiliation(s)
- T A A Khalifa
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt.
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