Embryo mortality and its relation with the phase of follicular development at mating in alpaca
The objective of this study was to evaluate the relation between the phase of follicular development (growth, maintenance or regression) during mating with embryo mortality to day 35-post mating. 116 alpacas ≥ 3 years of age were examined daily by transrectal ultrasonography (Aloka SSD 500) using a...
| Autores principales: | , , |
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| Formato: | info:eu-repo/semantics/bookPart |
| Lenguaje: | Inglés |
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Wageningen Academic Publishers
2023
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/20.500.12955/2141 https://doi.org/10.3920/978-90-8686-576-5 |
| _version_ | 1855028494043447296 |
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| author | Huanca López, Wilfredo Cervantes, Miriam Huanca Mamani, Teodosio |
| author_browse | Cervantes, Miriam Huanca López, Wilfredo Huanca Mamani, Teodosio |
| author_facet | Huanca López, Wilfredo Cervantes, Miriam Huanca Mamani, Teodosio |
| author_sort | Huanca López, Wilfredo |
| collection | Repositorio INIA |
| description | The objective of this study was to evaluate the relation between the phase of follicular development (growth, maintenance or regression) during mating with embryo mortality to day 35-post mating. 116 alpacas ≥ 3 years of age were examined daily by transrectal ultrasonography (Aloka SSD 500) using a 7.5 MHz linear-array transducer to evaluate follicular status and then assigned to the following groups G1: Growing follicle 5 - 6 mm (n = 27); G2: Growing ≥ 7 mm.(n=30); G3 Maintenance ≥ 7 mm. (n = 30); G4 Regressing follicle ≥7 mm. (n= 29). Ultrasounds examinations were performed on days 0, 2, 9, 20, 25, 30 and 35 to determine occurance of ovulation (day 2); Corpus Luteum diameter (CL (day 9) and presence of embryonic vesicle or embryo (day 20 to 35). Male acceptance, ovulation and conception rate was compared by Chi Square test between groups. Acceptance rate was 100% in groups G2,G3 and G4 but only 81.5% of animals of G1 with follicle of 6 mm. accepted mating. Ovulation rate was 95.5; 96.7; 100.0 and 96.6% in G1; G2; G3 and G4, respectively (P > 0.05) and no differences were detected between groups in CL diameter. Conception rate on day 20 was 57.1; 68.9; 60.0 and 50.0% for G1; G2; G3 and G4 (P > 0.05). Embryonic loss rates from day 20 to 35 were not significantly different between groups. This result suggest that the status of follicular development at mating would not have influence on embryo mortality rate between day 20 and 35 of gestation in alpacas and that animals that accepted mating in all phase, including the one with follicle of 6 mm diameter present similar reproductive performance. |
| format | info:eu-repo/semantics/bookPart |
| id | INIA2141 |
| institution | Institucional Nacional de Innovación Agraria |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Wageningen Academic Publishers |
| publisherStr | Wageningen Academic Publishers |
| record_format | dspace |
| spelling | INIA21412023-07-07T16:23:20Z Embryo mortality and its relation with the phase of follicular development at mating in alpaca Huanca López, Wilfredo Cervantes, Miriam Huanca Mamani, Teodosio Alpaca Embryo mortality Follicular status Mating https://purl.org/pe-repo/ocde/ford#4.02.01 Alpacas Alpaca Semen Copulation Cópula Embryonic mortality Mortalidad embrionaria The objective of this study was to evaluate the relation between the phase of follicular development (growth, maintenance or regression) during mating with embryo mortality to day 35-post mating. 116 alpacas ≥ 3 years of age were examined daily by transrectal ultrasonography (Aloka SSD 500) using a 7.5 MHz linear-array transducer to evaluate follicular status and then assigned to the following groups G1: Growing follicle 5 - 6 mm (n = 27); G2: Growing ≥ 7 mm.(n=30); G3 Maintenance ≥ 7 mm. (n = 30); G4 Regressing follicle ≥7 mm. (n= 29). Ultrasounds examinations were performed on days 0, 2, 9, 20, 25, 30 and 35 to determine occurance of ovulation (day 2); Corpus Luteum diameter (CL (day 9) and presence of embryonic vesicle or embryo (day 20 to 35). Male acceptance, ovulation and conception rate was compared by Chi Square test between groups. Acceptance rate was 100% in groups G2,G3 and G4 but only 81.5% of animals of G1 with follicle of 6 mm. accepted mating. Ovulation rate was 95.5; 96.7; 100.0 and 96.6% in G1; G2; G3 and G4, respectively (P > 0.05) and no differences were detected between groups in CL diameter. Conception rate on day 20 was 57.1; 68.9; 60.0 and 50.0% for G1; G2; G3 and G4 (P > 0.05). Embryonic loss rates from day 20 to 35 were not significantly different between groups. This result suggest that the status of follicular development at mating would not have influence on embryo mortality rate between day 20 and 35 of gestation in alpacas and that animals that accepted mating in all phase, including the one with follicle of 6 mm diameter present similar reproductive performance. 2023-04-26T22:41:36Z 2023-04-26T22:41:36Z 2006-12-01 info:eu-repo/semantics/bookPart Certificado de obtentor-variedades vegetales Huanca, W.; Cervantes, M.; & Huanca, T. (2006). Embryo mortality and its relation with the phase of follicular development at mating in alpaca. In South American Camelids Research: Proceedings of the 4th European Symposium on South American Camelids and DECAMA European Seminar doi: 10.3920/978-90-8686-576-5 978-90-76998-98-5 https://hdl.handle.net/20.500.12955/2141 https://doi.org/10.3920/978-90-8686-576-5 eng urn:isbn:978-90-76998-98-5 South American Camelids Research: Proceedings of the 4th European Symposium on South American Camelids and DECAMA European Seminar info:eu-repo/semantics/restrictedAccess application/pdf Wageningen Academic Publishers NL Instituto Nacional de Innovación Agraria Repositorio Institucional - INIA |
| spellingShingle | Alpaca Embryo mortality Follicular status Mating https://purl.org/pe-repo/ocde/ford#4.02.01 Alpacas Alpaca Semen Copulation Cópula Embryonic mortality Mortalidad embrionaria Huanca López, Wilfredo Cervantes, Miriam Huanca Mamani, Teodosio Embryo mortality and its relation with the phase of follicular development at mating in alpaca |
| title | Embryo mortality and its relation with the phase of follicular development at mating in alpaca |
| title_full | Embryo mortality and its relation with the phase of follicular development at mating in alpaca |
| title_fullStr | Embryo mortality and its relation with the phase of follicular development at mating in alpaca |
| title_full_unstemmed | Embryo mortality and its relation with the phase of follicular development at mating in alpaca |
| title_short | Embryo mortality and its relation with the phase of follicular development at mating in alpaca |
| title_sort | embryo mortality and its relation with the phase of follicular development at mating in alpaca |
| topic | Alpaca Embryo mortality Follicular status Mating https://purl.org/pe-repo/ocde/ford#4.02.01 Alpacas Alpaca Semen Copulation Cópula Embryonic mortality Mortalidad embrionaria |
| url | https://hdl.handle.net/20.500.12955/2141 https://doi.org/10.3920/978-90-8686-576-5 |
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