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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
08/11/1996 |
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Data da última atualização: |
26/11/2013 |
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Autoria: |
SCHMIDT, A. M.; GAMERMAN, D. |
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Título: |
Temporal aggregation in dynamic linear models. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
In: SIMPÓSIO NACIONAL DE PROBABILIDADE E ESTATÍSTICA, 12., 1996, Caxambu. Resumos... São Paulo: ABE, 1996. |
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Páginas: |
p. 369-370. |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of this work is to study aggregation of time series following certain classes of Dynamic Linear Models (DLM) and how the aggregation observations can possibly influence the forecasting performance. |
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Palavras-Chave: |
Modelos lineares; Séries temporais. |
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Thesaurus Nal: |
Models; Time series analysis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00769naa a2200193 a 4500
001 1003990
005 2013-11-26
008 1996 bl uuuu u00u1 u #d
100 1 $aSCHMIDT, A. M.
245 $aTemporal aggregation in dynamic linear models.
260 $c1996
300 $ap. 369-370.
520 $aThe aim of this work is to study aggregation of time series following certain classes of Dynamic Linear Models (DLM) and how the aggregation observations can possibly influence the forecasting performance.
650 $aModels
650 $aTime series analysis
653 $aModelos lineares
653 $aSéries temporais
700 1 $aGAMERMAN, D.
773 $tIn: SIMPÓSIO NACIONAL DE PROBABILIDADE E ESTATÍSTICA, 12., 1996, Caxambu. Resumos... São Paulo: ABE, 1996.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
31/01/2022 |
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Data da última atualização: |
31/01/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
DINIZ, J. V. A.; DELL'AQUA JUNIOR, J. A.; OBA, E.; FREITAS, R. R. de; PEIXOTO, R. M.; SILVA, L. O.; MAIA, G. F. N. M.; CARVALHO, B. P.; LOUREIRO, B.; SATRAPA, R. A. |
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Afiliação: |
JEFFERSON VIANA ALVES DINIZ, Universidade Estadual Paulista “Julio Mesquita Filho” (UNESP); JOSÉ ANTONIO DELL'AQUA JUNIOR, Universidade Estadual Paulista ?Julio Mesquita Filho? (UNESP); EUNICE OBA, Universidade Estadual Paulista “Julio Mesquita Filho” (UNESP); ROSANO RAMOS DE FREITAS, Universidade Federal do Acre (UFAC); RENATO MESQUITA PEIXOTO, CNPCO; LAINE OLIVEIRA SILVA, Universidade Federal do Acre (UFAC); GERBSON FRANCISCO NOGUEIRA MAIA, Universidade Federal do Acre (UFAC); BRUNO PENA CARVALHO, CPAF-AC; BÁRBARA LOUREIRO, Universidade de Vila Velha (UVV); RAFAEL AUGUSTO SATRAPA, Universidade Federal do Acre (UFAC). |
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Título: |
Influência da progesterona injetável na taxa de prenhez e perda gestacional de fêmeas nelore de distintas categorias reprodutivas submetidas a inseminação artificial em tempo fixo. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Acta Scientiae Veterinariae, v. 49, 1828, 2021. |
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ISSN: |
1678-0345 (impresso) / 1679-9216 (online) |
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DOI: |
10.22456/1679-9216.113632 |
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Idioma: |
Português |
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Conteúdo: |
Progesterone (P4) is essential for embryonic development and maintenance of pregnancy when deficiency causes early embryonic loss. In this study, we investigated the ability of hormonal supplementation to improve the fertility of Nellore females subjected to fixed-time artificial insemination (IATF) protocols. Here, we evaluated the effect of long-acting injectable progesterone (iP4) supplementation in the D4 after IATF on pregnancy rate and pregnancy loss in Nellore females (Bos taurus indicus) from different reproductive categories in Western Amazonia. Materials, Methods & Results: Eight hundred thirteen Nellore females from 5 farms were selected and distributed into 2 groups: control [GC; administration of 0.5 mL of 0.9% saline solution, intramuscularly - IM] (n = 407) and a group that received injectable progesterone (iP4) that was long-acting [GiP4; administration of 0.5 mL of iP4, 300 mg, via IM four days after IATF] (n = 406). Each group contained 3 subgroups: heifers, primiparous cows, and multiparous cows. Of the 407 animals in the CG, 103 were heifers, 107 primiparous, and 197 multiparous. Of the 406 animals in the GiP4 group, there were 101 heifers, 107 primiparous, and 198 multiparous. On a random day of the estrous cycle (D0), an intravaginal device containing 1 g of P4 and 2 mg of estradiol benzoate (BE) was inserted by intramuscular injection. On D8, the P4 device was removed and 150 μg of D-cloprostenol (PGF2α), 300 IU eCG, and 1 mg BE were administered IM. Cows were inseminated at D10, 48-52 h after procedure on D8. Pregnancy diagnosis was made between 35 and 40 days after insemination through ultrasound examination. Between 80 and 90 days after insemination, a new ultrasound examination was performed to assess early pregnancy loss. The data were processed using the SAS 9.2. The conception rate, pregnancy loss, and final conception rate were analyzed using PROC GLIMMIX according to groups (CG and GiP4), categories (heifers, primiparous and multiparous), and their interactions as variables. The differences in the means of least squares were adjusted using the Tukey?Kramer method. Statistical significance was defined as P < 0.05. The general conception rate was 46% (375/816). Regardless of the animal class, GiP4 animals (51.97%) had higher conception rates (P < 0.05) than CG (40.29%). In the subgroups (heifers, primiparous and multiparous cows), there was a difference (P < 0.05) between animals treated with iP4 (52.48%, 57.94%, and 48.48%, respectively) and those who were not (39.81%, 41.12%, and 40.10%, respectively). Gestational losses, regardless of the animal class, were higher in females in the CG (7.93%) [P < 0.05] compared to those in the GiP4 group (2.84%). Regardless of treatment with iP4, the percentage of gestational loss in heifers was significantly higher (10.64%) than that in primiparous and multiparous cows (3.77% and 2.86%, respectively). The final conception rates were higher in animals that received long-acting iP4, which increased the final pregnancy in all parity categories. Discussion: In the present study, the use of iP4 increased the pregnancy rate in Nellore females, regardless of the category. Although there has been no consensus on the use of iP4, there is an agreement that increases in the pregnancy rate are related to the moment of exogenous P4 application. In addition to influencing the pregnancy rate, reduction in pregnancy losses is also attributed to iP4 treatment, a fact demonstrated in the present study, where animals treated with iP4 had a lower pregnancy loss rate than normally occurs in beef cattle. Supplementation with long-acting iP4 increased the pregnancy rate at D35-40, reduced pregnancy losses, and increased the conception rate on D80-90 days in Nellore females reared in the Western Amazon, regardless of the animal category. MenosProgesterone (P4) is essential for embryonic development and maintenance of pregnancy when deficiency causes early embryonic loss. In this study, we investigated the ability of hormonal supplementation to improve the fertility of Nellore females subjected to fixed-time artificial insemination (IATF) protocols. Here, we evaluated the effect of long-acting injectable progesterone (iP4) supplementation in the D4 after IATF on pregnancy rate and pregnancy loss in Nellore females (Bos taurus indicus) from different reproductive categories in Western Amazonia. Materials, Methods & Results: Eight hundred thirteen Nellore females from 5 farms were selected and distributed into 2 groups: control [GC; administration of 0.5 mL of 0.9% saline solution, intramuscularly - IM] (n = 407) and a group that received injectable progesterone (iP4) that was long-acting [GiP4; administration of 0.5 mL of iP4, 300 mg, via IM four days after IATF] (n = 406). Each group contained 3 subgroups: heifers, primiparous cows, and multiparous cows. Of the 407 animals in the CG, 103 were heifers, 107 primiparous, and 197 multiparous. Of the 406 animals in the GiP4 group, there were 101 heifers, 107 primiparous, and 198 multiparous. On a random day of the estrous cycle (D0), an intravaginal device containing 1 g of P4 and 2 mg of estradiol benzoate (BE) was inserted by intramuscular injection. On D8, the P4 device was removed and 150 μg of D-cloprostenol (PGF2α), 300 IU eCG, and 1 mg BE were administ... Mostrar Tudo |
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Palavras-Chave: |
Fertilidad animal; Ganado de carne; Hormonas progestacionales; Inseminación artificial; Métodos de mejoramiento genético; Ovulación; Reproducción de animales; Vacas para carne. |
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Thesagro: |
Fertilidade Animal; Gado de Corte; Gado Nelore; Hormônio; Inseminação Artificial; Ovulação; Prenhez; Progesterona; Reprodução Animal; Vaca de Corte. |
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Thesaurus NAL: |
Animal breeding; Animal fertility; Animal reproduction; Artificial insemination; Beef cattle; Beef cows; Breeding methods; Nellore; Ovulation; Progestational hormones; Progesterone. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/230718/1/27293.pdf
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Marc: |
LEADER 05695naa a2200601 a 4500
001 2139496
005 2022-01-31
008 2021 bl uuuu u00u1 u #d
022 $a1678-0345 (impresso) / 1679-9216 (online)
024 7 $a10.22456/1679-9216.113632$2DOI
100 1 $aDINIZ, J. V. A.
245 $aInfluência da progesterona injetável na taxa de prenhez e perda gestacional de fêmeas nelore de distintas categorias reprodutivas submetidas a inseminação artificial em tempo fixo.$h[electronic resource]
260 $c2021
520 $aProgesterone (P4) is essential for embryonic development and maintenance of pregnancy when deficiency causes early embryonic loss. In this study, we investigated the ability of hormonal supplementation to improve the fertility of Nellore females subjected to fixed-time artificial insemination (IATF) protocols. Here, we evaluated the effect of long-acting injectable progesterone (iP4) supplementation in the D4 after IATF on pregnancy rate and pregnancy loss in Nellore females (Bos taurus indicus) from different reproductive categories in Western Amazonia. Materials, Methods & Results: Eight hundred thirteen Nellore females from 5 farms were selected and distributed into 2 groups: control [GC; administration of 0.5 mL of 0.9% saline solution, intramuscularly - IM] (n = 407) and a group that received injectable progesterone (iP4) that was long-acting [GiP4; administration of 0.5 mL of iP4, 300 mg, via IM four days after IATF] (n = 406). Each group contained 3 subgroups: heifers, primiparous cows, and multiparous cows. Of the 407 animals in the CG, 103 were heifers, 107 primiparous, and 197 multiparous. Of the 406 animals in the GiP4 group, there were 101 heifers, 107 primiparous, and 198 multiparous. On a random day of the estrous cycle (D0), an intravaginal device containing 1 g of P4 and 2 mg of estradiol benzoate (BE) was inserted by intramuscular injection. On D8, the P4 device was removed and 150 μg of D-cloprostenol (PGF2α), 300 IU eCG, and 1 mg BE were administered IM. Cows were inseminated at D10, 48-52 h after procedure on D8. Pregnancy diagnosis was made between 35 and 40 days after insemination through ultrasound examination. Between 80 and 90 days after insemination, a new ultrasound examination was performed to assess early pregnancy loss. The data were processed using the SAS 9.2. The conception rate, pregnancy loss, and final conception rate were analyzed using PROC GLIMMIX according to groups (CG and GiP4), categories (heifers, primiparous and multiparous), and their interactions as variables. The differences in the means of least squares were adjusted using the Tukey?Kramer method. Statistical significance was defined as P < 0.05. The general conception rate was 46% (375/816). Regardless of the animal class, GiP4 animals (51.97%) had higher conception rates (P < 0.05) than CG (40.29%). In the subgroups (heifers, primiparous and multiparous cows), there was a difference (P < 0.05) between animals treated with iP4 (52.48%, 57.94%, and 48.48%, respectively) and those who were not (39.81%, 41.12%, and 40.10%, respectively). Gestational losses, regardless of the animal class, were higher in females in the CG (7.93%) [P < 0.05] compared to those in the GiP4 group (2.84%). Regardless of treatment with iP4, the percentage of gestational loss in heifers was significantly higher (10.64%) than that in primiparous and multiparous cows (3.77% and 2.86%, respectively). The final conception rates were higher in animals that received long-acting iP4, which increased the final pregnancy in all parity categories. Discussion: In the present study, the use of iP4 increased the pregnancy rate in Nellore females, regardless of the category. Although there has been no consensus on the use of iP4, there is an agreement that increases in the pregnancy rate are related to the moment of exogenous P4 application. In addition to influencing the pregnancy rate, reduction in pregnancy losses is also attributed to iP4 treatment, a fact demonstrated in the present study, where animals treated with iP4 had a lower pregnancy loss rate than normally occurs in beef cattle. Supplementation with long-acting iP4 increased the pregnancy rate at D35-40, reduced pregnancy losses, and increased the conception rate on D80-90 days in Nellore females reared in the Western Amazon, regardless of the animal category.
650 $aAnimal breeding
650 $aAnimal fertility
650 $aAnimal reproduction
650 $aArtificial insemination
650 $aBeef cattle
650 $aBeef cows
650 $aBreeding methods
650 $aNellore
650 $aOvulation
650 $aProgestational hormones
650 $aProgesterone
650 $aFertilidade Animal
650 $aGado de Corte
650 $aGado Nelore
650 $aHormônio
650 $aInseminação Artificial
650 $aOvulação
650 $aPrenhez
650 $aProgesterona
650 $aReprodução Animal
650 $aVaca de Corte
653 $aFertilidad animal
653 $aGanado de carne
653 $aHormonas progestacionales
653 $aInseminación artificial
653 $aMétodos de mejoramiento genético
653 $aOvulación
653 $aReproducción de animales
653 $aVacas para carne
700 1 $aDELL'AQUA JUNIOR, J. A.
700 1 $aOBA, E.
700 1 $aFREITAS, R. R. de
700 1 $aPEIXOTO, R. M.
700 1 $aSILVA, L. O.
700 1 $aMAIA, G. F. N. M.
700 1 $aCARVALHO, B. P.
700 1 $aLOUREIRO, B.
700 1 $aSATRAPA, R. A.
773 $tActa Scientiae Veterinariae$gv. 49, 1828, 2021.
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