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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha : |
16/03/2016 |
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Actualizado : |
05/11/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
FREITAS-DE-MELO, A.; DAMIÁN, J.P.; HÖTZEL ,M.J.; BANCHERO, G.; UNGERFELD, R. |
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Afiliación : |
ALINE FREITAS-DE-MELO, UdelaR (Universidad de la República), FVET ( Facultad de Veterinaria), Montevideo, Uruguay.; JUAN PABLO DAMIÁN, UdelaR (Universidad de la República), FVET ( Facultad de Veterinaria), Montevideo, Uruguay.; MARIA JOSÉ HÖTZEL, Laboratório de Etologia Aplicada, Departamento de Zootecnia e Desenvolvimento Rural, Universidade Federal de Santa Catarina, Florianópolis, Brazil.; GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RODOLFO UNGERFELD, UdelaR (Universidad de la República), FVET ( Facultad de Veterinaria), Montevideo, Uruguay. |
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Título : |
Progesterone pretreatment increases the stress response to social isolation in ewes. |
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Fecha de publicación : |
2016 |
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Fuente / Imprenta : |
Hormones v.15, n.1, p. 81-87,2016 |
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DOI : |
10.14310/horm.2002.1625 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received: 02-07-2015. //Accepted: 11-09-2015. |
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Palabras claves : |
BEHAVIOUR; BINESTAR ANIMAL; BODY TEMPERATURE; CORTISOL; HORMONAS; OPEN FILD TEST; PRUEBA DE CAMPO DE CAMPO; SHEEP; TEMPERATURA DEL CUERPO. |
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Thesagro : |
COMPORTAMIENTO ANIMAL; OVEJAS; PROGESTERONA. |
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Asunto categoría : |
L74 Trastornos misceláneos de los animales |
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Marc : |
LEADER 00961naa a2200325 a 4500
001 1054454
005 2019-11-05
008 2016 bl uuuu u00u1 u #d
024 7 $a10.14310/horm.2002.1625$2DOI
100 1 $aFREITAS-DE-MELO, A.
245 $aProgesterone pretreatment increases the stress response to social isolation in ewes.$h[electronic resource]
260 $c2016
500 $aArticle history: Received: 02-07-2015. //Accepted: 11-09-2015.
650 $aCOMPORTAMIENTO ANIMAL
650 $aOVEJAS
650 $aPROGESTERONA
653 $aBEHAVIOUR
653 $aBINESTAR ANIMAL
653 $aBODY TEMPERATURE
653 $aCORTISOL
653 $aHORMONAS
653 $aOPEN FILD TEST
653 $aPRUEBA DE CAMPO DE CAMPO
653 $aSHEEP
653 $aTEMPERATURA DEL CUERPO
700 1 $aDAMIÁN, J.P.
700 1 $aHÖTZEL ,M.J.
700 1 $aBANCHERO, G.
700 1 $aUNGERFELD, R.
773 $tHormones$gv.15, n.1, p. 81-87,2016
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INIA La Estanzuela (LE) |
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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha actual : |
14/03/2017 |
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Actualizado : |
13/01/2020 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
VAN LIER, E.; HART, K.W.; VIÑOLES, C.; PAGANONI, B.; BLACHE, D. |
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Afiliación : |
E. VAN LIER, Universidad de la República (UdelaR)/ Facultad de Agronomía; K. W. HART; CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; B. PAGANONI; D. BLACHE. |
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Título : |
Calm Merino ewes have a higher ovulation rate and more multiple pregnancies than nervous ewes. |
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Fecha de publicación : |
2017 |
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Fuente / Imprenta : |
Animal, 2017, v. 11, no. 7, p. 1196-1202. |
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DOI : |
10.1017/S1751731117000106 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 15 June 2016; Accepted 13 December 2016. |
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Contenido : |
In 1990, two selection lines of Merino sheep were established for low and high behavioural reactivity (calm and nervous temperament) at the University of Western Australia. Breeding records consistently showed that calm ewes weaned 10% to 19% more lambs than the nervous ewes. We hypothesise that calm ewes could have a higher ovulation rate than nervous ewes and/or calm ewes could have a lower rate of embryo mortality than nervous ewes. We tested these hypotheses by comparing the ovulation rate and the rate of embryo mortality between the calm and nervous lines before and after synchronisation and artificial insemination. Merino ewes from the temperament selection lines (calm, n = 100; nervous, n = 100) were synchronised (early breeding season) for artificial insemination (day 0) (intravaginal sponges containing fluogestone acetate and eCG immediately after sponge withdrawal). On day-17 and 11 ovarian cyclicity and corpora lutea, and on days 30 and 74 pregnancies and embryos/foetuses were determined by ultrasound. Progesterone, insulin and leptin concentrations were determined in blood plasma samples from days 5, 12 and 17. Ovarian cyclicity before and after oestrus synchronisation did not differ between the lines, but ovulation rate did (day-17: calm 1.63; nervous 1.26; P<0.01; day 11: calm 1.83; nervous 1.57; P<0.05). Ovulation rate on day 11 in nervous ewes was higher than on day-17. Loss of embryos by day 30 was high (calm: 71/150; nervous: 68/130); but nervous ewes had a lower proportion (15/47) of multiple pregnancies compared with calm ewes (30/46; P<0.01). Reproductive loss between days 30 and 74 represented 7.3% of the overall loss. Temperament did not affect concentrations of progesterone, but nervous ewes had higher insulin (32.0 pmol/l ± 1.17 SEM; P = 0.013) and lower leptin (1.18 μg/l ± 0.04 SEM; P = 0.002) concentrations than calm ewes (insulin: 27.8 pmol/l ± 1.17 SEM; leptin: 1.35 μg/l ± 0.04 SEM). The differences in reproductive outcomes between the calm and nervous ewes were mainly due to a higher ovulation rate in calm ewes. We suggest that reproduction in nervous ewes is compromised by factors leading up to ovulation and conception, or the uterine environment during early pregnancy, that reflect differences in energy utilisation. MenosIn 1990, two selection lines of Merino sheep were established for low and high behavioural reactivity (calm and nervous temperament) at the University of Western Australia. Breeding records consistently showed that calm ewes weaned 10% to 19% more lambs than the nervous ewes. We hypothesise that calm ewes could have a higher ovulation rate than nervous ewes and/or calm ewes could have a lower rate of embryo mortality than nervous ewes. We tested these hypotheses by comparing the ovulation rate and the rate of embryo mortality between the calm and nervous lines before and after synchronisation and artificial insemination. Merino ewes from the temperament selection lines (calm, n = 100; nervous, n = 100) were synchronised (early breeding season) for artificial insemination (day 0) (intravaginal sponges containing fluogestone acetate and eCG immediately after sponge withdrawal). On day-17 and 11 ovarian cyclicity and corpora lutea, and on days 30 and 74 pregnancies and embryos/foetuses were determined by ultrasound. Progesterone, insulin and leptin concentrations were determined in blood plasma samples from days 5, 12 and 17. Ovarian cyclicity before and after oestrus synchronisation did not differ between the lines, but ovulation rate did (day-17: calm 1.63; nervous 1.26; P<0.01; day 11: calm 1.83; nervous 1.57; P<0.05). Ovulation rate on day 11 in nervous ewes was higher than on day-17. Loss of embryos by day 30 was high (calm: 71/150; nervous: 68/130); but nervous ewes had a... Presentar Todo |
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Palabras claves : |
EMBRYO; INSULIN; LEPTIN; OVIS ARIES; PROGESTERONE. |
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Thesagro : |
OVINOS. |
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Asunto categoría : |
L01 Ganadería |
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Marc : |
LEADER 03073naa a2200265 a 4500
001 1056829
005 2020-01-13
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1017/S1751731117000106$2DOI
100 1 $aVAN LIER, E.
245 $aCalm Merino ewes have a higher ovulation rate and more multiple pregnancies than nervous ewes.$h[electronic resource]
260 $c2017
500 $aArticle history: Received 15 June 2016; Accepted 13 December 2016.
520 $aIn 1990, two selection lines of Merino sheep were established for low and high behavioural reactivity (calm and nervous temperament) at the University of Western Australia. Breeding records consistently showed that calm ewes weaned 10% to 19% more lambs than the nervous ewes. We hypothesise that calm ewes could have a higher ovulation rate than nervous ewes and/or calm ewes could have a lower rate of embryo mortality than nervous ewes. We tested these hypotheses by comparing the ovulation rate and the rate of embryo mortality between the calm and nervous lines before and after synchronisation and artificial insemination. Merino ewes from the temperament selection lines (calm, n = 100; nervous, n = 100) were synchronised (early breeding season) for artificial insemination (day 0) (intravaginal sponges containing fluogestone acetate and eCG immediately after sponge withdrawal). On day-17 and 11 ovarian cyclicity and corpora lutea, and on days 30 and 74 pregnancies and embryos/foetuses were determined by ultrasound. Progesterone, insulin and leptin concentrations were determined in blood plasma samples from days 5, 12 and 17. Ovarian cyclicity before and after oestrus synchronisation did not differ between the lines, but ovulation rate did (day-17: calm 1.63; nervous 1.26; P<0.01; day 11: calm 1.83; nervous 1.57; P<0.05). Ovulation rate on day 11 in nervous ewes was higher than on day-17. Loss of embryos by day 30 was high (calm: 71/150; nervous: 68/130); but nervous ewes had a lower proportion (15/47) of multiple pregnancies compared with calm ewes (30/46; P<0.01). Reproductive loss between days 30 and 74 represented 7.3% of the overall loss. Temperament did not affect concentrations of progesterone, but nervous ewes had higher insulin (32.0 pmol/l ± 1.17 SEM; P = 0.013) and lower leptin (1.18 μg/l ± 0.04 SEM; P = 0.002) concentrations than calm ewes (insulin: 27.8 pmol/l ± 1.17 SEM; leptin: 1.35 μg/l ± 0.04 SEM). The differences in reproductive outcomes between the calm and nervous ewes were mainly due to a higher ovulation rate in calm ewes. We suggest that reproduction in nervous ewes is compromised by factors leading up to ovulation and conception, or the uterine environment during early pregnancy, that reflect differences in energy utilisation.
650 $aOVINOS
653 $aEMBRYO
653 $aINSULIN
653 $aLEPTIN
653 $aOVIS ARIES
653 $aPROGESTERONE
700 1 $aHART, K.W.
700 1 $aVIÑOLES, C.
700 1 $aPAGANONI, B.
700 1 $aBLACHE, D.
773 $tAnimal, 2017$gv. 11, no. 7, p. 1196-1202.
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