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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha : |
02/10/2017 |
Actualizado : |
05/11/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
DAMIAN, J.P.; HÖTZEL, M.J.; BANCHERO, G.; UNGELFERD, R. |
Afiliación : |
JUAN PABLO DAMIAN, UdelaR (Universidad de la República), FVET ( Facultad de Veterinaria), Montevideo, Uruguay.; MARIA JOSÉ HÖTZEL, Laborat#1;orio de Etologia Aplicada e Bem-Estar Animal, Departamento de Zootecnia e Desenvolvimento Rural, Universidade Federal de Santa Catarina, Florian#1;opolis, Brazil.; GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RODOLFO UNGELFERD, RODOLFO UNGERFELD, UdelaR (Universidad de la República), FVET ( Facultad de Veterinaria), Montevideo, Uruguay. |
Título : |
Competition for oestrous ewes between rams reared by their mothers or artificially reared: Effects on sexual behaviour and testosterone and cortisol serum concentrations. |
Fecha de publicación : |
2017 |
Fuente / Imprenta : |
Theriogenology, v.100, p. 134-138, 2017. |
DOI : |
doi.org/10.1016/j.theriogenology.2017.06.009 |
Idioma : |
Inglés |
Notas : |
Article history: Received 4 November 2016//Received in revised form 5 June 2017//Accepted 6 June 2017//Available online 8 June 2017. |
Contenido : |
A b s t r a c t:
The objective of this study was to determine how the social competition for an oestrous ewe affects the
sexual behaviour and the endocrine response in two groups of rams, one reared by their mothers and
another artificially reared. Thus, we compared the sexual behaviour and testosterone and cortisol
changes in each group of rams in competitive and non-competitive tests, both during the first and second
breeding seasons. Two groups of rams were: 1) artificially reared lambs, separated from their dams 24
e36 h after birth (Week 0) and artificially fed with sheep milk until 10 weeks of age (group AR, n ¼ 14);
and 2) lambs reared by their dams until 10 weeks of age (group DR, n ¼ 13). Rams were subjected to noncompetitive
and competitive tests for an oestrous ewe during their first and second breeding seasons,
when they were 8 and 20 months old, respectively. Sexual behaviours toward an oestrous ewe were
recorded during 20 min and the testosterone and cortisol concentrations were determined in serum
samples collected immediately before the test, and 20, 40 and 60 min after it. During the first breeding
season, the number of flehmen decreased in DR rams, and the number of flehmen and ano-genital
sniffings also decreased in DR rams, but the frequency of some copulatory behaviours increased (matings
and ejaculation/total mounts in DR rams, and total mounts in AR rams) in competitive tests. During
the second breeding season, competition caused a decrease in the number of all the recorded behaviours
(courtship and copulation) with the exception of flehmen in AR rams; however, in DR rams only the
number of the copulatory behaviours decreased under competition. Competition did not affect the
endocrine response during the first breeding season. During the second breeding season, while testosterone
concentrations were greater in non-competitive than in competitive tests at 60 min (P ¼ 0.0008)
in AR rams, in DR rams it tended to be greater (P ¼ 0.09). Competition did not affect cortisol concentrations
in any group or season, but in all tests the concentrations increased at the end of the test
(P < 0.05). In conclusion, the lack of the mother during rearing negatively affected the sexual motivation
and the testosterone response of rams to oestrous ewes in competitive tests, effects that were more
evident when adults. Neither the absence of the mother during rearing nor competition for oestrous
ewes affected the stress response (evidenced by increase in cortisol concentration) in rams during both
seasons. MenosA b s t r a c t:
The objective of this study was to determine how the social competition for an oestrous ewe affects the
sexual behaviour and the endocrine response in two groups of rams, one reared by their mothers and
another artificially reared. Thus, we compared the sexual behaviour and testosterone and cortisol
changes in each group of rams in competitive and non-competitive tests, both during the first and second
breeding seasons. Two groups of rams were: 1) artificially reared lambs, separated from their dams 24
e36 h after birth (Week 0) and artificially fed with sheep milk until 10 weeks of age (group AR, n ¼ 14);
and 2) lambs reared by their dams until 10 weeks of age (group DR, n ¼ 13). Rams were subjected to noncompetitive
and competitive tests for an oestrous ewe during their first and second breeding seasons,
when they were 8 and 20 months old, respectively. Sexual behaviours toward an oestrous ewe were
recorded during 20 min and the testosterone and cortisol concentrations were determined in serum
samples collected immediately before the test, and 20, 40 and 60 min after it. During the first breeding
season, the number of flehmen decreased in DR rams, and the number of flehmen and ano-genital
sniffings also decreased in DR rams, but the frequency of some copulatory behaviours increased (matings
and ejaculation/total mounts in DR rams, and total mounts in AR rams) in competitive tests. During
the second breeding season, competition caused a decrease in the numb... Presentar Todo |
Palabras claves : |
CORTISOL; MOTHER-OFFSPRING; SHEEP; STRESS; TESTOSTERONE. |
Thesagro : |
OVEJA. |
Asunto categoría : |
-- |
Marc : |
LEADER 03469naa a2200253 a 4500 001 1057622 005 2019-11-05 008 2017 bl uuuu u00u1 u #d 024 7 $adoi.org/10.1016/j.theriogenology.2017.06.009$2DOI 100 1 $aDAMIAN, J.P. 245 $aCompetition for oestrous ewes between rams reared by their mothers or artificially reared$bEffects on sexual behaviour and testosterone and cortisol serum concentrations.$h[electronic resource] 260 $c2017 500 $aArticle history: Received 4 November 2016//Received in revised form 5 June 2017//Accepted 6 June 2017//Available online 8 June 2017. 520 $aA b s t r a c t: The objective of this study was to determine how the social competition for an oestrous ewe affects the sexual behaviour and the endocrine response in two groups of rams, one reared by their mothers and another artificially reared. Thus, we compared the sexual behaviour and testosterone and cortisol changes in each group of rams in competitive and non-competitive tests, both during the first and second breeding seasons. Two groups of rams were: 1) artificially reared lambs, separated from their dams 24 e36 h after birth (Week 0) and artificially fed with sheep milk until 10 weeks of age (group AR, n ¼ 14); and 2) lambs reared by their dams until 10 weeks of age (group DR, n ¼ 13). Rams were subjected to noncompetitive and competitive tests for an oestrous ewe during their first and second breeding seasons, when they were 8 and 20 months old, respectively. Sexual behaviours toward an oestrous ewe were recorded during 20 min and the testosterone and cortisol concentrations were determined in serum samples collected immediately before the test, and 20, 40 and 60 min after it. During the first breeding season, the number of flehmen decreased in DR rams, and the number of flehmen and ano-genital sniffings also decreased in DR rams, but the frequency of some copulatory behaviours increased (matings and ejaculation/total mounts in DR rams, and total mounts in AR rams) in competitive tests. During the second breeding season, competition caused a decrease in the number of all the recorded behaviours (courtship and copulation) with the exception of flehmen in AR rams; however, in DR rams only the number of the copulatory behaviours decreased under competition. Competition did not affect the endocrine response during the first breeding season. During the second breeding season, while testosterone concentrations were greater in non-competitive than in competitive tests at 60 min (P ¼ 0.0008) in AR rams, in DR rams it tended to be greater (P ¼ 0.09). Competition did not affect cortisol concentrations in any group or season, but in all tests the concentrations increased at the end of the test (P < 0.05). In conclusion, the lack of the mother during rearing negatively affected the sexual motivation and the testosterone response of rams to oestrous ewes in competitive tests, effects that were more evident when adults. Neither the absence of the mother during rearing nor competition for oestrous ewes affected the stress response (evidenced by increase in cortisol concentration) in rams during both seasons. 650 $aOVEJA 653 $aCORTISOL 653 $aMOTHER-OFFSPRING 653 $aSHEEP 653 $aSTRESS 653 $aTESTOSTERONE 700 1 $aHÖTZEL, M.J. 700 1 $aBANCHERO, G. 700 1 $aUNGELFERD, R. 773 $tTheriogenology$gv.100, p. 134-138, 2017.
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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha actual : |
19/03/2021 |
Actualizado : |
22/03/2021 |
Tipo de producción científica : |
Trabajos en Congresos/Conferencias |
Autor : |
FERNANDEZ, E.; SOARES DE LIMA, J.M.; FERRARO, B.; LANFRANCO, B. |
Afiliación : |
ENRIQUE GENARO FERNANDEZ RODRIGUEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JUAN MANUEL SOARES DE LIMA LAPETINA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; BRUNO FERRARO ALBERTONI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; BRUNO ANTONIO LANFRANCO CRESPO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Technology adoption, production performance and factors driving farmers' decision making process in beef cattle farms in Uruguay. |
Fecha de publicación : |
2019 |
Fuente / Imprenta : |
In: 23rd ICABR (Intenational Consortium on Applied Bioeconomy Research) Conference,4-7 June 2019, Ravello, Italy. [Trabajo en Congreso + Poster + Presentación Oral]. |
Idioma : |
Inglés |
Contenido : |
Abstract:
In 2016, the Sustainable Development Solutions Network (SDSN) project issued the first report with the Agricultural Transformation Pathways (ATP) for Uruguay and two other selected study cases. Beef is one of the main agri-food chains included in Uruguay´s first studies given is the
country´s main export, production is the largest in terms of land used (12,6 million ha) and farms involved (44780). After setting Sustainable Development Goals (SDG)-consistent ATPs, the proposed ?backcasting? methodology includes the identification of roadblocks to overcome to
transition. Using data from the National Cattle Farm Survey 2016 (1298 farms) this paper addresses the relationship between farm business orientation, farm size, technological level, and production performance. The objective is to understand the main constraints to the adoption of technology and the driving factors to consider in the design of future assistance programs. Cattle farms were classified according to their livestock business main orientation. A Technological Index (TI) was developed and calculated for each farm using data of application
of specific production practices, farm production efficiency indicators and the extension and type of improved pastures in the farm. Results show a strong and increasing relationship trend between farm size, technological level, production performance and net income, particularly for cow-calf operations. Available facilities for specific technology implementation and excess stocking rate are some of the main factors constraining productivity. Small farmers´ view of cattle accumulation as a denotation of wealth and a secure readily available savings fund needs to be addressed in future programs seeking higher technology use and production. MenosAbstract:
In 2016, the Sustainable Development Solutions Network (SDSN) project issued the first report with the Agricultural Transformation Pathways (ATP) for Uruguay and two other selected study cases. Beef is one of the main agri-food chains included in Uruguay´s first studies given is the
country´s main export, production is the largest in terms of land used (12,6 million ha) and farms involved (44780). After setting Sustainable Development Goals (SDG)-consistent ATPs, the proposed ?backcasting? methodology includes the identification of roadblocks to overcome to
transition. Using data from the National Cattle Farm Survey 2016 (1298 farms) this paper addresses the relationship between farm business orientation, farm size, technological level, and production performance. The objective is to understand the main constraints to the adoption of technology and the driving factors to consider in the design of future assistance programs. Cattle farms were classified according to their livestock business main orientation. A Technological Index (TI) was developed and calculated for each farm using data of application
of specific production practices, farm production efficiency indicators and the extension and type of improved pastures in the farm. Results show a strong and increasing relationship trend between farm size, technological level, production performance and net income, particularly for cow-calf operations. Available facilities for specific technology implementation a... Presentar Todo |
Palabras claves : |
DEVELOPMENT; LIVESTOCK PRODUCTION; SDSN; SUSTAINABLE INTENSIFICATION; TECHNOLOGY ADOPTION. |
Thesagro : |
APPLIED ECONOMY UNIT; BEEF CATTLE; ECONOMY PROGRAM; PRODUCTION SYSTEMS; PROGRAMA DE ECONONÍA; SISTEMAS DE PRODUCCIÓN; UNIDAD ECONOMIA APLICADA - INIA. |
Asunto categoría : |
A50 Investigación agraria |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/15369/1/ICABR-2019-Paper-225.pdf
http://www.ainfo.inia.uy/digital/bitstream/item/15370/1/Poster-paper-225-Ravello.pdf
|
Marc : |
LEADER 02828nam a2200289 a 4500 001 1061847 005 2021-03-22 008 2019 bl uuuu u01u1 u #d 100 1 $aFERNANDEZ, E. 245 $aTechnology adoption, production performance and factors driving farmers' decision making process in beef cattle farms in Uruguay.$h[electronic resource] 260 $aIn: 23rd ICABR (Intenational Consortium on Applied Bioeconomy Research) Conference,4-7 June 2019, Ravello, Italy. [Trabajo en Congreso + Poster + Presentación Oral].$c2019 520 $aAbstract: In 2016, the Sustainable Development Solutions Network (SDSN) project issued the first report with the Agricultural Transformation Pathways (ATP) for Uruguay and two other selected study cases. Beef is one of the main agri-food chains included in Uruguay´s first studies given is the country´s main export, production is the largest in terms of land used (12,6 million ha) and farms involved (44780). After setting Sustainable Development Goals (SDG)-consistent ATPs, the proposed ?backcasting? methodology includes the identification of roadblocks to overcome to transition. Using data from the National Cattle Farm Survey 2016 (1298 farms) this paper addresses the relationship between farm business orientation, farm size, technological level, and production performance. The objective is to understand the main constraints to the adoption of technology and the driving factors to consider in the design of future assistance programs. Cattle farms were classified according to their livestock business main orientation. A Technological Index (TI) was developed and calculated for each farm using data of application of specific production practices, farm production efficiency indicators and the extension and type of improved pastures in the farm. Results show a strong and increasing relationship trend between farm size, technological level, production performance and net income, particularly for cow-calf operations. Available facilities for specific technology implementation and excess stocking rate are some of the main factors constraining productivity. Small farmers´ view of cattle accumulation as a denotation of wealth and a secure readily available savings fund needs to be addressed in future programs seeking higher technology use and production. 650 $aAPPLIED ECONOMY UNIT 650 $aBEEF CATTLE 650 $aECONOMY PROGRAM 650 $aPRODUCTION SYSTEMS 650 $aPROGRAMA DE ECONONÍA 650 $aSISTEMAS DE PRODUCCIÓN 650 $aUNIDAD ECONOMIA APLICADA - INIA 653 $aDEVELOPMENT 653 $aLIVESTOCK PRODUCTION 653 $aSDSN 653 $aSUSTAINABLE INTENSIFICATION 653 $aTECHNOLOGY ADOPTION 700 1 $aSOARES DE LIMA, J.M. 700 1 $aFERRARO, B. 700 1 $aLANFRANCO, B.
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