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 | Acceso al texto completo restringido a Biblioteca INIA Tacuarembó. Por información adicional contacte bibliotb@tb.inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha : |
11/11/2014 |
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Actualizado : |
11/05/2020 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
MONTOSSI, F.; HODGSON, J.; MORRIS, S.T.; RISSO, D.; GORDON, I.L. |
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Afiliación : |
FABIO MARCELO MONTOSSI PORCHILE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JONATHAN M. HODGSON, College of Sciences, Massey University, Palmerston North, New Zealand; S. T. MORRIS, College of Sciences, Massey University, Palmerston North, New Zealand; DIEGO FERNANDO RISSO RIET, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; I. L. GORDON, College of Sciences, Massey University, Palmerston North, New Zealand. |
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Título : |
A comparative study of herbage intake, ingestive behaviour and diet selection, and effects of condensed tannins upon body and wool growth in lambs grazing Yorkshire fog (Holcus lanatus) and annual ryegrass (Lolium multiflorum) dominant swards. |
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Fecha de publicación : |
2001 |
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Fuente / Imprenta : |
Journal of Agricultural Science, 2001, v. 136, no. 2, p. 241-251. DOI: https://doi.org/10.1017/S0021859601008668 |
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DOI : |
10.1017/S0021859601008668 |
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Idioma : |
Inglés |
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Notas : |
Article history: Revised MS received 19 April 2000 // .Published online by Cambridge University Press 25 April 2001. |
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Contenido : |
An experiment was carried out from August to early November 1994 to examine differences in diet selection, herbage intake, grazing behaviour and animal performance between weaned lambs rotationally grazing swards of annual ryegrass (Lolium multiflorum)}white clover (Trifolium repens)
and Yorkshire fog (Holcus lanatus)}T. repens with or without Lotus corniculatus. There were four replicate groups of six lambs per treatment. The effects of condensed tannins (CT) on lamb production were assessed by twice-daily oral administration of 10 g polyethylene glycol (PEG; molecular weight 4000) to half the lambs on each sward. The Lotus content of all swards was very low, and results are presented here for main sward comparisons meaned over lotus treatments. Overall mean estimates of pre-grazing herbage mass and sward surface height for the annual ryegrass and Yorkshire fog swards respectively, were 5820 v. 4360³190 kg DM}ha (P!0±001) and 29 v. 21³0±6 cm (P!0±001). The coefficient of organic matter digestibility (OMD) of the diet selected and herbage intake were higher on Yorkshire fog than on annual ryegrass (0±78 v. 0±74³0±080 g}kg; P!0±05, and 1070 v. 860³57 g OM per lamb per day, P!0±05 respectively), reflecting the higher content in the diet of grass green leaf (980 v. 930 g}kg³14 g}kg, P!0±05) and the lower content of dead material (80 v. 110³15 g}kg, P!0±08). Lambs grazing on Yorkshire fog swards had higher clean wool growth rate (1470 v. 1280³30 mg}cm per day, P!0±01) and greater fibre diameter (31 v. 29³0±2 µ, P!0±001), greater liveweight gain (152 v. 108³5±5 g}day, P!0±001), final weight (42 v.
38³0±5 kg, P!0±001), carcass weight gain (89 v. 69³2±5 g}day, P!0±001), carcass weight (19 v. 17³0±3 kg, P!0±001) and soft tissue thickness (GR value 11 v. 8³0±5 mm, P!0±01), and lower faecal egg counts (FEC; square root transferred values 9±2 v. 11±0³0±4 eggs}g fresh faeces, P!0±01)
than lambs grazing annual ryegrass swards. Similar dietary concentrations of condensed tannins (CT) between Yorkshire fog and annual ryegrass swards (4±2 v. 3±7 DM³0±2 g}kg, P!0±08) increased clean wool growth (1440 v. 1310³32 mg}cm# per day, P!0±05), fibre diameter (30±7 v. 29±5³0±21 µ,
P!0±01) and liveweight gain (141 v. 120³4±3 g per lamb per day, P!0±01), although differences in carcass weight (17±9 v. 18±2³0±3 kg) and FEC transformed values (9±6 v. 11±0³0±6 eggs}g fresh faeces) were not significant. The effects of CT on animal performance were greater in Yorkshire fog
swards. CT had no significant effects on diet selection, herbage intake and grazing behaviour patterns. MenosAn experiment was carried out from August to early November 1994 to examine differences in diet selection, herbage intake, grazing behaviour and animal performance between weaned lambs rotationally grazing swards of annual ryegrass (Lolium multiflorum)}white clover (Trifolium repens)
and Yorkshire fog (Holcus lanatus)}T. repens with or without Lotus corniculatus. There were four replicate groups of six lambs per treatment. The effects of condensed tannins (CT) on lamb production were assessed by twice-daily oral administration of 10 g polyethylene glycol (PEG; molecular weight 4000) to half the lambs on each sward. The Lotus content of all swards was very low, and results are presented here for main sward comparisons meaned over lotus treatments. Overall mean estimates of pre-grazing herbage mass and sward surface height for the annual ryegrass and Yorkshire fog swards respectively, were 5820 v. 4360³190 kg DM}ha (P!0±001) and 29 v. 21³0±6 cm (P!0±001). The coefficient of organic matter digestibility (OMD) of the diet selected and herbage intake were higher on Yorkshire fog than on annual ryegrass (0±78 v. 0±74³0±080 g}kg; P!0±05, and 1070 v. 860³57 g OM per lamb per day, P!0±05 respectively), reflecting the higher content in the diet of grass green leaf (980 v. 930 g}kg³14 g}kg, P!0±05) and the lower content of dead material (80 v. 110³15 g}kg, P!0±08). Lambs grazing on Yorkshire fog swards had higher clean wool growth rate (1470 v. 1280³30 mg}cm per day, P!0±01) and greate... Presentar Todo |
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Thesagro : |
GANADO BOVINO; PASTURAS; TANINOS. |
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Asunto categoría : |
L01 Ganadería |
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Marc : |
LEADER 03605naa a2200229 a 4500
001 1051564
005 2020-05-11
008 2001 bl uuuu u00u1 u #d
024 7 $a10.1017/S0021859601008668$2DOI
100 1 $aMONTOSSI, F.
245 $aA comparative study of herbage intake, ingestive behaviour and diet selection, and effects of condensed tannins upon body and wool growth in lambs grazing Yorkshire fog (Holcus lanatus) and annual ryegrass (Lolium multiflorum) dominant swards.
260 $c2001
500 $aArticle history: Revised MS received 19 April 2000 // .Published online by Cambridge University Press 25 April 2001.
520 $aAn experiment was carried out from August to early November 1994 to examine differences in diet selection, herbage intake, grazing behaviour and animal performance between weaned lambs rotationally grazing swards of annual ryegrass (Lolium multiflorum)}white clover (Trifolium repens) and Yorkshire fog (Holcus lanatus)}T. repens with or without Lotus corniculatus. There were four replicate groups of six lambs per treatment. The effects of condensed tannins (CT) on lamb production were assessed by twice-daily oral administration of 10 g polyethylene glycol (PEG; molecular weight 4000) to half the lambs on each sward. The Lotus content of all swards was very low, and results are presented here for main sward comparisons meaned over lotus treatments. Overall mean estimates of pre-grazing herbage mass and sward surface height for the annual ryegrass and Yorkshire fog swards respectively, were 5820 v. 4360³190 kg DM}ha (P!0±001) and 29 v. 21³0±6 cm (P!0±001). The coefficient of organic matter digestibility (OMD) of the diet selected and herbage intake were higher on Yorkshire fog than on annual ryegrass (0±78 v. 0±74³0±080 g}kg; P!0±05, and 1070 v. 860³57 g OM per lamb per day, P!0±05 respectively), reflecting the higher content in the diet of grass green leaf (980 v. 930 g}kg³14 g}kg, P!0±05) and the lower content of dead material (80 v. 110³15 g}kg, P!0±08). Lambs grazing on Yorkshire fog swards had higher clean wool growth rate (1470 v. 1280³30 mg}cm per day, P!0±01) and greater fibre diameter (31 v. 29³0±2 µ, P!0±001), greater liveweight gain (152 v. 108³5±5 g}day, P!0±001), final weight (42 v. 38³0±5 kg, P!0±001), carcass weight gain (89 v. 69³2±5 g}day, P!0±001), carcass weight (19 v. 17³0±3 kg, P!0±001) and soft tissue thickness (GR value 11 v. 8³0±5 mm, P!0±01), and lower faecal egg counts (FEC; square root transferred values 9±2 v. 11±0³0±4 eggs}g fresh faeces, P!0±01) than lambs grazing annual ryegrass swards. Similar dietary concentrations of condensed tannins (CT) between Yorkshire fog and annual ryegrass swards (4±2 v. 3±7 DM³0±2 g}kg, P!0±08) increased clean wool growth (1440 v. 1310³32 mg}cm# per day, P!0±05), fibre diameter (30±7 v. 29±5³0±21 µ, P!0±01) and liveweight gain (141 v. 120³4±3 g per lamb per day, P!0±01), although differences in carcass weight (17±9 v. 18±2³0±3 kg) and FEC transformed values (9±6 v. 11±0³0±6 eggs}g fresh faeces) were not significant. The effects of CT on animal performance were greater in Yorkshire fog swards. CT had no significant effects on diet selection, herbage intake and grazing behaviour patterns.
650 $aGANADO BOVINO
650 $aPASTURAS
650 $aTANINOS
700 1 $aHODGSON, J.
700 1 $aMORRIS, S.T.
700 1 $aRISSO, D.
700 1 $aGORDON, I.L.
773 $tJournal of Agricultural Science, 2001$gv. 136, no. 2, p. 241-251. DOI: https://doi.org/10.1017/S0021859601008668
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INIA Tacuarembó (TBO) |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
07/11/2018 |
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Actualizado : |
07/11/2018 |
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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 : |
DAMIÁN, J.P.; HÖTZEL ,M.J.; BANCHERO, G.; UNGERFELD, R. |
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Afiliación : |
JUAN PABLO DAMIÁN, UdelaR (Universidad de la República), FVET ( Facultad de Veterinaria), Montevideo, Uruguay.; MARIA JOSÉ HÖTZEL, Laboratório de Etologia Aplicada e Bem-Estar Animal, Departamento de Zootecnia e Desenvolvimento Rural, Universidade Federal de Santa Catarina, 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 : |
Growing without a mother during rearing affects the response to stressors in rams. |
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Fecha de publicación : |
2018 |
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Fuente / Imprenta : |
Applied Animal Behaviour Science, December 2018, volumen 209, pages 36-40. |
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DOI : |
10.1016/j.applanim.2018.08.022 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 18 September 2017 // Received in revised form 7 August 2018 // Accepted 31 August 2018 // Available online 05 September 2018. |
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Contenido : |
ABSTRACT.
Early maternal care contributes to the normal development of the physiological, social and emotional functions of the offspring. As sheep are a strongly gregarious species, separation and isolation of an individual from the flock provokes fear and, consequently a stress response. The first aim of this study was to compare the stress response to social isolation of rams that were reared by their mothers or artificially reared. A complementary objective was to compare the cortisol response to an ACTH challenge in both groups of rams. Rams were: 1) separated from their dams 24?36 h after birth (Week 0) and artificially fed with sheep milk until Week 10 (group AR, n = 14); or 2) reared by their dams until Week 10 (group DR, n = 13). The rams were then kept in separate, adjacent paddocks for the rest of the study. When they were 8 months old, 10 animals randomly selected from each group were isolated from the group in an unfamiliar pen during 10 min. Behavioural (the number of lines crossed, frequencies of vocalizations, eliminations, sniffing, escape attempts and freezing), physiological (heart and respiratory rate, and rectal temperature), biochemical (total blood proteins, globulins and albumin), and endocrine (serum cortisol concentrations) variables were recorded. Dam-reared rams eliminated (defecations + urinations) more times and crossed more lines during the social isolation test than AR lambs (P < 0.05). The increase in total proteins and albumin concentration after the social isolation test was also greater in DR than AR rams (P = 0.01 and P < 0.01 respectively). Artificially-reared rams had greater globulin concentration than DR rams after the test (P = 0.04). When rams were 2 years old, ACTH was administered to 10 rams randomly selected from each group, and the cortisol response was measured. Dam-reared rams had greater cortisol concentrations than AR rams at 150 and 180 min after the administration of ACTH (P < 0.05). In conclusion, artificially reared rams were less affected by social isolation and had lower adrenal response to an ACTH challenge than rams reared by their mothers. This study suggests that the relationship with the mother plays a key role in the development of rams? social behaviour. © 2018 Elsevier B.V. MenosABSTRACT.
Early maternal care contributes to the normal development of the physiological, social and emotional functions of the offspring. As sheep are a strongly gregarious species, separation and isolation of an individual from the flock provokes fear and, consequently a stress response. The first aim of this study was to compare the stress response to social isolation of rams that were reared by their mothers or artificially reared. A complementary objective was to compare the cortisol response to an ACTH challenge in both groups of rams. Rams were: 1) separated from their dams 24?36 h after birth (Week 0) and artificially fed with sheep milk until Week 10 (group AR, n = 14); or 2) reared by their dams until Week 10 (group DR, n = 13). The rams were then kept in separate, adjacent paddocks for the rest of the study. When they were 8 months old, 10 animals randomly selected from each group were isolated from the group in an unfamiliar pen during 10 min. Behavioural (the number of lines crossed, frequencies of vocalizations, eliminations, sniffing, escape attempts and freezing), physiological (heart and respiratory rate, and rectal temperature), biochemical (total blood proteins, globulins and albumin), and endocrine (serum cortisol concentrations) variables were recorded. Dam-reared rams eliminated (defecations + urinations) more times and crossed more lines during the social isolation test than AR lambs (P < 0.05). The increase in total proteins and albumin concentration ... Presentar Todo |
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Palabras claves : |
CORTISOL; MOTHER-OFFSPRING BOND; SHEEP; STRESS. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 03098naa a2200229 a 4500
001 1059281
005 2018-11-07
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1016/j.applanim.2018.08.022$2DOI
100 1 $aDAMIÁN, J.P.
245 $aGrowing without a mother during rearing affects the response to stressors in rams.$h[electronic resource]
260 $c2018
500 $aArticle history: Received 18 September 2017 // Received in revised form 7 August 2018 // Accepted 31 August 2018 // Available online 05 September 2018.
520 $aABSTRACT. Early maternal care contributes to the normal development of the physiological, social and emotional functions of the offspring. As sheep are a strongly gregarious species, separation and isolation of an individual from the flock provokes fear and, consequently a stress response. The first aim of this study was to compare the stress response to social isolation of rams that were reared by their mothers or artificially reared. A complementary objective was to compare the cortisol response to an ACTH challenge in both groups of rams. Rams were: 1) separated from their dams 24?36 h after birth (Week 0) and artificially fed with sheep milk until Week 10 (group AR, n = 14); or 2) reared by their dams until Week 10 (group DR, n = 13). The rams were then kept in separate, adjacent paddocks for the rest of the study. When they were 8 months old, 10 animals randomly selected from each group were isolated from the group in an unfamiliar pen during 10 min. Behavioural (the number of lines crossed, frequencies of vocalizations, eliminations, sniffing, escape attempts and freezing), physiological (heart and respiratory rate, and rectal temperature), biochemical (total blood proteins, globulins and albumin), and endocrine (serum cortisol concentrations) variables were recorded. Dam-reared rams eliminated (defecations + urinations) more times and crossed more lines during the social isolation test than AR lambs (P < 0.05). The increase in total proteins and albumin concentration after the social isolation test was also greater in DR than AR rams (P = 0.01 and P < 0.01 respectively). Artificially-reared rams had greater globulin concentration than DR rams after the test (P = 0.04). When rams were 2 years old, ACTH was administered to 10 rams randomly selected from each group, and the cortisol response was measured. Dam-reared rams had greater cortisol concentrations than AR rams at 150 and 180 min after the administration of ACTH (P < 0.05). In conclusion, artificially reared rams were less affected by social isolation and had lower adrenal response to an ACTH challenge than rams reared by their mothers. This study suggests that the relationship with the mother plays a key role in the development of rams? social behaviour. © 2018 Elsevier B.V.
653 $aCORTISOL
653 $aMOTHER-OFFSPRING BOND
653 $aSHEEP
653 $aSTRESS
700 1 $aHÖTZEL ,M.J.
700 1 $aBANCHERO, G.
700 1 $aUNGERFELD, R.
773 $tApplied Animal Behaviour Science, December 2018, volumen 209, pages 36-40.
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