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Engeldal SEC
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Impact of sheep stocking density and breed on behaviour of newly regrouped adult rams SEC, Engeldal; ., Subandriyo; E, Handiwirawan; RR, Noor
Indonesian Journal of Animal and Veterinary Sciences Vol 18, No 1 (2013)
Publisher : Indonesian Animal Sciences Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (169.915 KB) | DOI: 10.14334/jitv.v18i1.253

Abstract

Placing animals in cages with certain density and good grouping were two important aspects needed in intensive livestock production system to produce optimal production and animal welfare. The objective of this study was to examine effect of stocking density, breed and elapse of time on behaviour of newly regrouped, unacquainted adult rams from three sheep breeds i.e. Barbados Blackbelly Cross, Local Garut and Composite Garut, as possible factor causing variation in welfare status. Instantaneous scan sampling was used for recording sheep behaviour at three different stocking densities. Thirty-six adult rams were used in this research and divided into three groups (n = 12) on the basis of breed. At each stocking density four rams of the same breed were observed during two consecutive days. The recorded behaviours were agonistic-, self-care-, exploratory-, aberrant-, mating-, locomotive- and standing behaviour. The results showed that during the entire experiment agonistic behaviour was observed at the highest frequency. Stocking density was found to have a significant effect on exploratory-, locomotive- and standing behaviour. The effect of breed was found to cause significant differences in agonistic-, self-care-, aberrant- and mating behaviour. Significant differences were also found between day 1 and day 2 of regrouping for agonistic-, exploratory, self-care- and mating behaviour. It is concluded that the three breeds do differ in their behavioural reactions to different stocking density levels and time needed for adaptation after regrouping. Key Words: Sheep, Stocking Density, Behaviour, Animal Welfare
Effect of different levels of social isolation on the acoustical characteristics of sheep vocalization SEC, Engeldal; ., Subandriyo; E, Handiwirawan; RR, Noor
Indonesian Journal of Animal and Veterinary Sciences Vol 18, No 3 (2013)
Publisher : Indonesian Animal Sciences Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.134 KB) | DOI: 10.14334/jitv.v18i3.323

Abstract

In farm animals, vocal analysis is accepted as a non-invasive method for assessing animal welfare in comparison to most physiological measurements. The aim of this study was to investigate the influence of different degrees of social isolation on the acoustic characteristics of stress-induced bleats from three different breeds of sheep. The experiment consisted of subjecting the animals to three different levels of social isolation during which both locomotive and vocal data were recorded. The data on locomotive behaviour was subjected to descriptive analysis while specialized acoustic software was used to measure a total of thirty-six parameters of recorded bleats. Descriptive analysis showed that the animals displayed more locomotive activity during partial isolation compared to complete isolation. Number of bleats during partial isolation was also found to be higher. The application of two-way analysis of variance showed a significant effect of isolation level and breed on both temporal and structural acoustic properties. Amplitude, power and time acoustic properties were found to affect acoustic quality of vocal responses to isolation, whereas frequency related properties were also found to be different significantly (P < 0.05) between breeds. From spectrogram analysis, the patterns of energy distribution within the calls proved to offer the most evident that differ between isolation levels and breeds. It was concluded that acoustic analysis can be helpful in revealing the affective state of socially isolated rams. Key Words: Sheep, Social Isolation, Vocalization, Behaviour, Animal Welfare
Impact of sheep stocking density and breed on behaviour of newly regrouped adult rams Engeldal SEC; Subandriyo .; Handiwirawan E; Noor RR
Jurnal Ilmu Ternak dan Veteriner Vol 18, No 1 (2013): MARCH 2013
Publisher : Indonesian Center for Animal Research and Development (ICARD)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (169.915 KB) | DOI: 10.14334/jitv.v18i1.253

Abstract

Placing animals in cages with certain density and good grouping were two important aspects needed in intensive livestock production system to produce optimal production and animal welfare. The objective of this study was to examine effect of stocking density, breed and elapse of time on behaviour of newly regrouped, unacquainted adult rams from three sheep breeds i.e. Barbados Blackbelly Cross, Local Garut and Composite Garut, as possible factor causing variation in welfare status. Instantaneous scan sampling was used for recording sheep behaviour at three different stocking densities. Thirty-six adult rams were used in this research and divided into three groups (n = 12) on the basis of breed. At each stocking density four rams of the same breed were observed during two consecutive days. The recorded behaviours were agonistic-, self-care-, exploratory-, aberrant-, mating-, locomotive- and standing behaviour. The results showed that during the entire experiment agonistic behaviour was observed at the highest frequency. Stocking density was found to have a significant effect on exploratory-, locomotive- and standing behaviour. The effect of breed was found to cause significant differences in agonistic-, self-care-, aberrant- and mating behaviour. Significant differences were also found between day 1 and day 2 of regrouping for agonistic-, exploratory, self-care- and mating behaviour. It is concluded that the three breeds do differ in their behavioural reactions to different stocking density levels and time needed for adaptation after regrouping. Key Words: Sheep, Stocking Density, Behaviour, Animal Welfare
Effect of different levels of social isolation on the acoustical characteristics of sheep vocalization Engeldal SEC; Subandriyo .; Handiwirawan E; Noor RR
Jurnal Ilmu Ternak dan Veteriner Vol 18, No 3 (2013): SEPTEMBER 2013
Publisher : Indonesian Center for Animal Research and Development (ICARD)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.134 KB) | DOI: 10.14334/jitv.v18i3.323

Abstract

In farm animals, vocal analysis is accepted as a non-invasive method for assessing animal welfare in comparison to most physiological measurements. The aim of this study was to investigate the influence of different degrees of social isolation on the acoustic characteristics of stress-induced bleats from three different breeds of sheep. The experiment consisted of subjecting the animals to three different levels of social isolation during which both locomotive and vocal data were recorded. The data on locomotive behaviour was subjected to descriptive analysis while specialized acoustic software was used to measure a total of thirty-six parameters of recorded bleats. Descriptive analysis showed that the animals displayed more locomotive activity during partial isolation compared to complete isolation. Number of bleats during partial isolation was also found to be higher. The application of two-way analysis of variance showed a significant effect of isolation level and breed on both temporal and structural acoustic properties. Amplitude, power and time acoustic properties were found to affect acoustic quality of vocal responses to isolation, whereas frequency related properties were also found to be different significantly (P < 0.05) between breeds. From spectrogram analysis, the patterns of energy distribution within the calls proved to offer the most evident that differ between isolation levels and breeds. It was concluded that acoustic analysis can be helpful in revealing the affective state of socially isolated rams. Key Words: Sheep, Social Isolation, Vocalization, Behaviour, Animal Welfare
Co-Authors Handiwirawan E Noor RR Subandriyo .