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| Acceso al texto completo restringido a Biblioteca INIA Treinta y Tres. Por información adicional contacte bibliott@inia.org.uy. |
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Biblioteca (s) : |
INIA Treinta y Tres. |
Fecha : |
14/01/2022 |
Actualizado : |
14/01/2022 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
NÚÑEZ OLIVERA, R.; BÓ, G.A.; MENCHACA, A. |
Afiliación : |
R. NÚÑEZ OLIVERA, Instituto de Reproducción Animal Uruguay, Fundación IRAUy, Montevideo.; G.A. BÓ, Instituto de Reproducción Animal Córdoba (IRAC), Córdoba, Argentina. // Instituto A.P. de Ciencias Básicas y Aplicadas, Medicina Veterinaria, Universidad Nacional de Villa María. Córdoba, Argentina.; JOSE ALEJO MENCHACA BARBEITO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Association between length of proestrus, follicular size, estrus behavior, and pregnancy rate in beef heifers subjected to fixedetime artificial insemination. |
Fecha de publicación : |
2022 |
Fuente / Imprenta : |
Theriogenology, 15 March 2022, volume 181, pages 1-7. doi: https://doi.org/10.1016/j.theriogenology.2021.12.028 |
DOI : |
10.1016/j.theriogenology.2021.12.028 |
Idioma : |
Inglés |
Notas : |
Article history: Received 9 June 2021 / Received in revised form 22 December 2021 / Accepted 25 December 2021 / Available online 31 December 2021. |
Contenido : |
This study evaluated the relationship between proestrus length and follicular size, estrous behavior, and pregnancy rate in Bos taurus beef heifers subjected to ixedetime artificial insemination (FTAI). A total of 911 heifers received a synchronization treatment protocol for FTAI (JeSynch) consisting of an intravaginal
progesterone device for 6 d, estradiol benzoate at the time of device insertion cloprostenol sodium and eCG at device removal and GnRH at the time of FTAI. The presence or absence of a corpus luteum (CL) was determined by ultrasonography at device insertion and all heifers were tail painted at device removal for estrus detection at the time of FTAI. For the establishment of different periods of proestrus length (i.e., interval from device removal to FTAI), GnRH was administered i.m. at 48 h (n ¼ 308), 60 h (n ¼ 290) or 72 h (n ¼ 313) after device removal. The diameter of the largest follicle at the time of GnRH administrationwas determined by ultrasonography, expression of estrous was determined by percentage of tail paint removal, and FTAI was performed at the time of GnRH administration in all heifers. The diameter of the largest follicle was greater when GnRH/FTAI was performed at 72 or 60 h (12.9 ± 0.2 mm and 12.8 ± 0.1 mm, respectively) than at 48 h (12.2 ± 0.1 mm, P < 0.05). The proportion of heifers in estrus tended to be greater when GnRH/FTAI was performed at 72 h (77.0%, 137/178) than at 48 h (68.2%,
122/179; P ¼ 0.06), and intermediate at 60 h (71.4%, 120/168). Pregnancy rate tended to be greater in heifers with the longest (72 h: 70.0%, 219/313) than the shortest (48 h: 63.6%, 196/308; P < 0.1) proestrus length, while 60 h proestrus length was intermediate (63.1%, 183/290; P¼ NS). Pregnancy rate was
affected by the presence of a CL at device insertion (71.3%, 352/494 in heifers with a CL, vs. 59.0%, 246/417 for those without a CL; P < 0.01). For those heifers bearing a CL, pregnancy rate was greater in heifers with a 72 h proestrus length (77.0%, 134/174) than with 48 or 60 h proestrus length (67.7%, 107/158 and
68.5%, 111/162; respectively; P < 0.05). In heifers without a CL, proestrus length did not affect pregnancy rate. In summary, extending proestrus length by delaying the interval from device removal to GnRH/FTAI from 48 to 72 h, was associated with a greater diameter of the preovulatory follicle, greater proportion of heifers expressing estrus at the time of FTAI, and greater pregnancy rate in cycling beef heifers. MenosThis study evaluated the relationship between proestrus length and follicular size, estrous behavior, and pregnancy rate in Bos taurus beef heifers subjected to ixedetime artificial insemination (FTAI). A total of 911 heifers received a synchronization treatment protocol for FTAI (JeSynch) consisting of an intravaginal
progesterone device for 6 d, estradiol benzoate at the time of device insertion cloprostenol sodium and eCG at device removal and GnRH at the time of FTAI. The presence or absence of a corpus luteum (CL) was determined by ultrasonography at device insertion and all heifers were tail painted at device removal for estrus detection at the time of FTAI. For the establishment of different periods of proestrus length (i.e., interval from device removal to FTAI), GnRH was administered i.m. at 48 h (n ¼ 308), 60 h (n ¼ 290) or 72 h (n ¼ 313) after device removal. The diameter of the largest follicle at the time of GnRH administrationwas determined by ultrasonography, expression of estrous was determined by percentage of tail paint removal, and FTAI was performed at the time of GnRH administration in all heifers. The diameter of the largest follicle was greater when GnRH/FTAI was performed at 72 or 60 h (12.9 ± 0.2 mm and 12.8 ± 0.1 mm, respectively) than at 48 h (12.2 ± 0.1 mm, P < 0.05). The proportion of heifers in estrus tended to be greater when GnRH/FTAI was performed at 72 h (77.0%, 137/178) than at 48 h (68.2%,
122/179; P ¼ 0.06), and intermediate at 60 h (71.4... Presentar Todo |
Palabras claves : |
FOLÍCULO; FOLLICLE; OVULATION; TIMED ARTIFICAL INSEMINATION; ULTRASONOGRAFIA; ULTRASONOGRAPHY. |
Asunto categoría : |
L53 Fisiología Animal - Reproducción |
Marc : |
LEADER 03484naa a2200241 a 4500 001 1062633 005 2022-01-14 008 2022 bl uuuu u00u1 u #d 024 7 $a10.1016/j.theriogenology.2021.12.028$2DOI 100 1 $aNÚÑEZ OLIVERA, R. 245 $aAssociation between length of proestrus, follicular size, estrus behavior, and pregnancy rate in beef heifers subjected to fixedetime artificial insemination.$h[electronic resource] 260 $c2022 500 $aArticle history: Received 9 June 2021 / Received in revised form 22 December 2021 / Accepted 25 December 2021 / Available online 31 December 2021. 520 $aThis study evaluated the relationship between proestrus length and follicular size, estrous behavior, and pregnancy rate in Bos taurus beef heifers subjected to ixedetime artificial insemination (FTAI). A total of 911 heifers received a synchronization treatment protocol for FTAI (JeSynch) consisting of an intravaginal progesterone device for 6 d, estradiol benzoate at the time of device insertion cloprostenol sodium and eCG at device removal and GnRH at the time of FTAI. The presence or absence of a corpus luteum (CL) was determined by ultrasonography at device insertion and all heifers were tail painted at device removal for estrus detection at the time of FTAI. For the establishment of different periods of proestrus length (i.e., interval from device removal to FTAI), GnRH was administered i.m. at 48 h (n ¼ 308), 60 h (n ¼ 290) or 72 h (n ¼ 313) after device removal. The diameter of the largest follicle at the time of GnRH administrationwas determined by ultrasonography, expression of estrous was determined by percentage of tail paint removal, and FTAI was performed at the time of GnRH administration in all heifers. The diameter of the largest follicle was greater when GnRH/FTAI was performed at 72 or 60 h (12.9 ± 0.2 mm and 12.8 ± 0.1 mm, respectively) than at 48 h (12.2 ± 0.1 mm, P < 0.05). The proportion of heifers in estrus tended to be greater when GnRH/FTAI was performed at 72 h (77.0%, 137/178) than at 48 h (68.2%, 122/179; P ¼ 0.06), and intermediate at 60 h (71.4%, 120/168). Pregnancy rate tended to be greater in heifers with the longest (72 h: 70.0%, 219/313) than the shortest (48 h: 63.6%, 196/308; P < 0.1) proestrus length, while 60 h proestrus length was intermediate (63.1%, 183/290; P¼ NS). Pregnancy rate was affected by the presence of a CL at device insertion (71.3%, 352/494 in heifers with a CL, vs. 59.0%, 246/417 for those without a CL; P < 0.01). For those heifers bearing a CL, pregnancy rate was greater in heifers with a 72 h proestrus length (77.0%, 134/174) than with 48 or 60 h proestrus length (67.7%, 107/158 and 68.5%, 111/162; respectively; P < 0.05). In heifers without a CL, proestrus length did not affect pregnancy rate. In summary, extending proestrus length by delaying the interval from device removal to GnRH/FTAI from 48 to 72 h, was associated with a greater diameter of the preovulatory follicle, greater proportion of heifers expressing estrus at the time of FTAI, and greater pregnancy rate in cycling beef heifers. 653 $aFOLÍCULO 653 $aFOLLICLE 653 $aOVULATION 653 $aTIMED ARTIFICAL INSEMINATION 653 $aULTRASONOGRAFIA 653 $aULTRASONOGRAPHY 700 1 $aBÓ, G.A. 700 1 $aMENCHACA, A. 773 $tTheriogenology, 15 March 2022, volume 181, pages 1-7. doi: https://doi.org/10.1016/j.theriogenology.2021.12.028
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| Acceso al texto completo restringido a Biblioteca INIA La Estanzuela. Por información adicional contacte bib_le@inia.org.uy. |
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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha actual : |
30/10/2019 |
Actualizado : |
04/11/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
A - 1 |
Autor : |
NIELL, S.; JESÚS, F.; PÉREZ, C.; MENDOZA, Y.; DIAZ, R.; FRANCO, J.; CESIO, V.; HEINZEN, H. |
Afiliación : |
SILVINA NIELL, Universidad de la República, CENUR Noroeste, Departamento de Química del Litoral, PAAP, Ruta 3 km 363, CP60000 Paysandú, Uruguay.; FLORENCIA JESÚS, Universidad de la República, CENUR Noroeste, Departamento de Química del Litoral, PAAP, Ruta 3 km 363, CP60000 Paysandú, Uruguay.; CECILIA PÉREZ, Universidad de la República, CENUR Noroeste, Departamento de Química del Litoral, PAAP, Ruta 3 km 363, CP60000 Paysandú, Uruguay.; YAMANDU MENDOZA SPINA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ROSANA DIAZ, Ministerio Ganadería Agricultura y Pesca-DIGEGRA Montevideo, Uruguay.; JORGE FRANCO, Universidad de la República, Facultad de Agronomía, EEMAC, Ruta 3 km 363, CP60000 Paysandú, Uruguay.; VERÓNICA CESIO, 5Universidad de la República, Facultad de Química, Montevideo, Gral. Flores 2124, CP11800 Montevideo, Uruguay.; HORACIO HEINZEN, Universidad de la República, CENUR Noroeste, Departamento de Química del Litoral, PAAP, Ruta 3 km 363, CP60000 Paysandú, Uruguay. |
Título : |
QuEChERS adaptability for the analysis of pesticide residues in beehive products seeking the development of an agroecosystem sustainability monitor. |
Fecha de publicación : |
2015 |
Fuente / Imprenta : |
Journal of Agricultural and Food Chemistry, 13 May 2015, Volume 63, Issue 18, Pages 4484-4492. |
DOI : |
10.1021/acs.jafc.5b00795 |
Idioma : |
Inglés |
Notas : |
Article history: Publication Date (Web): 16 Apr 2015 |
Contenido : |
Abstract:
Beehive products could be powerful monitors of pesticide residues originating in agroecosystems during production cycles. Their ready availability provides enough samples to perform analytical determinations, but their chemical complexity makes residue analysis a real challenge. Taking advantage of the plasticity of QuEChERS coupled to LC-MS/MS, validated methodologies were developed for bees, honey, beeswax, and pollen and applied to real samples for the simultaneous determination of 19 of the most employed pesticides in intensive cropping fields. Beehives placed in Uruguayan agroecosystems accumulated the pesticides thiacloprid, imidacloprid, methomyl, carbaryl, hexythiazox, azoxystrobin, pyraclostrobin, tebuconazole, and haloxyfop-methyl at 0.0001?0.01 mg/kg levels. The oscillations on the amount and occurrence of residue findings for specific apiaries were correlated statistically with the sampling season and the agroecosystem where the beehives were located, showing the potential of bees and bee products to record relevant information to survey the chemicals applied in their surroundings. |
Palabras claves : |
BEEHIVE MATRICES; ENVIRONMENTAL MONITOR; PESTICIDAS-RESIDUOS; PESTICIDE RESIDUES; QuEChERS. |
Thesagro : |
ABEJAS; PESTICIDAS. |
Asunto categoría : |
-- |
Marc : |
LEADER 02125naa a2200313 a 4500 001 1060365 005 2019-11-04 008 2015 bl uuuu u00u1 u #d 024 7 $a10.1021/acs.jafc.5b00795$2DOI 100 1 $aNIELL, S. 245 $aQuEChERS adaptability for the analysis of pesticide residues in beehive products seeking the development of an agroecosystem sustainability monitor.$h[electronic resource] 260 $c2015 500 $aArticle history: Publication Date (Web): 16 Apr 2015 520 $aAbstract: Beehive products could be powerful monitors of pesticide residues originating in agroecosystems during production cycles. Their ready availability provides enough samples to perform analytical determinations, but their chemical complexity makes residue analysis a real challenge. Taking advantage of the plasticity of QuEChERS coupled to LC-MS/MS, validated methodologies were developed for bees, honey, beeswax, and pollen and applied to real samples for the simultaneous determination of 19 of the most employed pesticides in intensive cropping fields. Beehives placed in Uruguayan agroecosystems accumulated the pesticides thiacloprid, imidacloprid, methomyl, carbaryl, hexythiazox, azoxystrobin, pyraclostrobin, tebuconazole, and haloxyfop-methyl at 0.0001?0.01 mg/kg levels. The oscillations on the amount and occurrence of residue findings for specific apiaries were correlated statistically with the sampling season and the agroecosystem where the beehives were located, showing the potential of bees and bee products to record relevant information to survey the chemicals applied in their surroundings. 650 $aABEJAS 650 $aPESTICIDAS 653 $aBEEHIVE MATRICES 653 $aENVIRONMENTAL MONITOR 653 $aPESTICIDAS-RESIDUOS 653 $aPESTICIDE RESIDUES 653 $aQuEChERS 700 1 $aJESÚS, F. 700 1 $aPÉREZ, C. 700 1 $aMENDOZA, Y. 700 1 $aDIAZ, R. 700 1 $aFRANCO, J. 700 1 $aCESIO, V. 700 1 $aHEINZEN, H. 773 $tJournal of Agricultural and Food Chemistry, 13 May 2015, Volume 63, Issue 18, Pages 4484-4492.
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