Rivista e Edizione

Volume 55 (2022): Edizione 1 (January 2022)

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Volume 53 (2020): Edizione 2 (June 2020)

Volume 53 (2020): Edizione 1 (March 2020)

Volume 52 (2019): Edizione 3-4 (December 2019)

Volume 52 (2019): Edizione 2 (June 2019)

Volume 52 (2019): Edizione 1 (March 2019)

Volume 51 (2018): Edizione 4 (December 2018)

Volume 51 (2018): Edizione 3 (September 2018)

Volume 51 (2018): Edizione 2 (June 2018)

Volume 51 (2018): Edizione 1 (March 2018)

Volume 50 (2017): Edizione 4 (December 2017)

Volume 50 (2017): Edizione 3 (September 2017)

Volume 50 (2017): Edizione 2 (June 2017)

Volume 50 (2017): Edizione 1 (March 2017)

Volume 49 (2016): Edizione 1-4 (December 2016)

Volume 48 (2015): Edizione 3-4 (December 2015)

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Volume 47 (2014): Edizione 4 (December 2014)

Volume 47 (2014): Edizione 3 (September 2014)

Volume 47 (2014): Edizione 2 (June 2014)

Volume 47 (2014): Edizione 1 (March 2014)

Volume 46 (2013): Edizione 4 (December 2013)

Volume 46 (2013): Edizione 3 (September 2013)

Volume 46 (2013): Edizione 2 (June 2013)

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Volume 45 (2012): Edizione 3 (October 2012)

Volume 45 (2012): Edizione 2 (June 2012)

Volume 45 (2012): Edizione 1 (March 2012)

Dettagli della rivista
Formato
Rivista
eISSN
1801-0571
Pubblicato per la prima volta
24 Oct 2012
Periodo di pubblicazione
1 volta all'anno
Lingue
Inglese

Cerca

Volume 51 (2018): Edizione 4 (December 2018)

Dettagli della rivista
Formato
Rivista
eISSN
1801-0571
Pubblicato per la prima volta
24 Oct 2012
Periodo di pubblicazione
1 volta all'anno
Lingue
Inglese

Cerca

4 Articoli
Accesso libero

Social facilitation between commercial broilers and Nigerian indigenous chicks and its effect on their welfare

Pubblicato online: 07 Apr 2019
Pagine: 139 - 146

Astratto

Abstract

This study was undertaken to investigate how social facilitation between two chicken breeds could affect their welfare. Sixty chicks each of a commercial broiler (CB) and Nigerian indigenous chicken (NIC) breed were used for this study. At four days of age, the birds were randomly assigned into three treatments namely: T1 – singlestrain CB (10 birds), T2 – single-strain NIC (10 birds) and T3 – mixed-strain (5 CB and 5 NIC) each having three replicates. Feed intake and weight gain were measured from the 1st to the 4th week of age. Behavioural observations were undertaken between 09:00 h – 10:00 h for three consecutive days per week from the 2nd to 7th week of age. At the end of the 7th week, six birds per treatment were randomly selected for test of fear (tonic immobility) and level of stress (heterophil/lymphocyte ratio, H:L). Data collected were subjected to multivariate analysis using SPSS (version 21). A higher percentage (P < 0.05) of the CB displayed feeding, drinking and sitting compared to the NIC. However, higher percentage (P < 0.05) of the NIC displayed preening, foraging and standing behaviours compared to the CB. The percentage of birds drinking was greater in the mixed-strain (MS) compared to single-strain (SS). Also, there was a significant difference (P < 0.05) in breed × flock structure (FS) interaction on feeding and sitting behaviours specifically for NIC, where the percentage of NIC feeding was greater in the MS compared to SS. However, percentage of NIC sitting was greater (P < 0.05) in the SS compared to MS. CB were more fearful (P < 0.05) than NIC and chickens in the MS were less fearful (P < 0.05) compared to SS. The level of fear was reduced (P < 0.05) in the CB and NIC reared in MS compared to SS. H:L ratio was similar in CB and NIC reared either as SS or MS. Feed intake followed this trend T1 > T3 > T2. CB gained more weight compared to NIC. Body weight gain was similar in the SS compared to MS. In conclusion, MS management system had a positive influence on the welfare of both breeds.

Parole chiave

  • behaviour
  • feeding
  • drinking
  • sitting
  • heterophil/lymphocyte ratio
  • indigenous chickens
  • social facilitation
  • tonic immobility
Accesso libero

Effect of zinc oxide on liveweight, reproductive organ dimensions and spermatozoa production of Archachatina marginata during dry season

Pubblicato online: 07 Apr 2019
Pagine: 147 - 154

Astratto

Abstract

Demand for Giant African Land Snail in Nigeria is so high such that it is very difficult to meet up with the supply as a protein source. However, during dry season, production at intensive level is often challenged with decline in growth and reproduction despite interventions to boost production. This study therefore evaluates the effect of zinc oxide on liveweight, reproductive organ dimensions and spermatozoa production of Giant African Land Snail (Archachatina marginata) during dry season. Thirty-two (32) snails with an average weight of 100 – 180 g were used for this experiment. The snails were allotted to four different feeding treatments which included concentrate diet only, concentrate +10 mg/kg of zinc oxide, concentrate +15 mg/kg of zinc oxide and concentrate +20 mg/kg of zinc oxide, respectively. Each treatment contained eight replicates. After nine weeks, five snails were selected from each treatment and dissected. Variables monitored were: weekly weight gain, shell circumference, shell length and shell diameter. Other reproductive data collected after dissections were: organ weight, reproductive tract weight, albumen weight, ovo-testis weight, gonado-somatic index (GSI) and spermatozoa concentration. The result showed that dietary zinc oxide significantly (P < 0.001) influenced feed intake, shell parameters, organ weight ovo-testis weight, albumen weight, gonado-somatic index, reproductive tract weight and spermatozoa concentration. Snailsfed zinc oxide supplemented diet had better shell measurements, organ weight, ovo-testis weight, albumen weight, gonadosomatic index and reproductive tract weight. Considering spermatozoa concentration, 10 mg/kg of zinc oxide inclusion into concentrate diet gave the highest concentration. The results of the present study showed that dietary zinc oxide positively influenced feed intake, shell measurements, organ weight, ovo-testis and albumen weight. Similarly, gonado-somatic index and spermatozoa production were also positively influenced. Therefore, 10 mg/kg inclusion of zinc oxide is recommended for better reproductive tract development, and spermatozoa production at the desirable economic level during the dry season production of Archachatina marginata.

Parole chiave

  • aestivation
  • snail
  • feeding
  • growth
  • reproductive tract
  • spermatozoa
  • Nigeria
Accesso libero

Farmers’ proclivity to use soap opera for sourcing agricultural information in Southwest Nigeria

Pubblicato online: 07 Apr 2019
Pagine: 155 - 163

Astratto

Abstract

Given the soap opera’s potential to engender behaviour learning and meet the information needs of farmers, this paper sought to establish farmers’ propensity to use soap opera for sourcing agricultural information in Southwest Nigeria. A multi-stage sampling procedure was used to draw representative samples (150 farmers) in this study. Using interview schedule, data were elicited on farmers’ personal characteristics, awareness about the use of soap opera, perceived benefits of soap opera and proclivity to use it for sourcing agricultural information. Data were analysed using descriptive (frequencies, percentages, means) and inferential (Chi-square and PPMC) statistics at P = 0.05. Farmers’ age, years of schooling and household size were 52.1 ± 11.4 years, 10.5 ± 4.6 years and 5.9 ± 2.4 persons, respectively. Majority of the farmers (86.0%) had heard about soap opera and 76.0% heard of different soaps in the last couple of years and more than half (53.3%) had heard of different soaps from both radio and television. However, 90.7% did not know any kind of soap opera that was used to promote agriculture. More than half of the farmers (56.7%) had high inclination for sourcing agricultural information using soap opera. There was a significant correlation between farmers’ perceived benefits (r = 0.36; P = 0.00) and proclivity to use soap opera for sourcing agricultural information. Farmers’ positive proclivity to use soap implies that soap opera strategy has potentials to benefit farmers as a source of agricultural information; therefore, soap opera should be considered as veritable avenue for agricultural information dissemination in Southwest Nigeria.

Parole chiave

  • radio
  • television
  • soap opera awareness
  • perceived benefits
Accesso libero

Determinants of food price volatility in Nigeria

Pubblicato online: 07 Apr 2019
Pagine: 165 - 174

Astratto

Abstract

In this paper we examined the determinants of food price volatility in Nigeria using monthly data from January, 1997 to April, 2017. We employed the multivariate GARCH approach to evaluate the level of interdependence and the dynamics of volatility across these markets. In particular, the Baba-Engle-Kraft-Kroner (BEKK) model and the Dynamic Conditional Correlation (DCC) model were used for estimation. The findings showed that information shocks originating in Consumer Price Indices (CPI), lending rate, exchange rate and oil market have a direct effect on the current conditional volatility in food market while the information shocks originating in food have a direct effect on the current conditional volatility in all the markets considered except for oil. These results were insensitive to changes in data frequency and different oil price specification. Hence, the government should encourage the use of alternative sources of energy to reduce the effect of high oil prices on food prices and provide soft agricultural credit scheme to farmers with a low lending rate through specialized banks.

Parole chiave

  • price volatility
  • inflation rate
  • exchange rate
  • oil prices
  • interest rate
  • multivariate GARCH models
4 Articoli
Accesso libero

Social facilitation between commercial broilers and Nigerian indigenous chicks and its effect on their welfare

Pubblicato online: 07 Apr 2019
Pagine: 139 - 146

Astratto

Abstract

This study was undertaken to investigate how social facilitation between two chicken breeds could affect their welfare. Sixty chicks each of a commercial broiler (CB) and Nigerian indigenous chicken (NIC) breed were used for this study. At four days of age, the birds were randomly assigned into three treatments namely: T1 – singlestrain CB (10 birds), T2 – single-strain NIC (10 birds) and T3 – mixed-strain (5 CB and 5 NIC) each having three replicates. Feed intake and weight gain were measured from the 1st to the 4th week of age. Behavioural observations were undertaken between 09:00 h – 10:00 h for three consecutive days per week from the 2nd to 7th week of age. At the end of the 7th week, six birds per treatment were randomly selected for test of fear (tonic immobility) and level of stress (heterophil/lymphocyte ratio, H:L). Data collected were subjected to multivariate analysis using SPSS (version 21). A higher percentage (P < 0.05) of the CB displayed feeding, drinking and sitting compared to the NIC. However, higher percentage (P < 0.05) of the NIC displayed preening, foraging and standing behaviours compared to the CB. The percentage of birds drinking was greater in the mixed-strain (MS) compared to single-strain (SS). Also, there was a significant difference (P < 0.05) in breed × flock structure (FS) interaction on feeding and sitting behaviours specifically for NIC, where the percentage of NIC feeding was greater in the MS compared to SS. However, percentage of NIC sitting was greater (P < 0.05) in the SS compared to MS. CB were more fearful (P < 0.05) than NIC and chickens in the MS were less fearful (P < 0.05) compared to SS. The level of fear was reduced (P < 0.05) in the CB and NIC reared in MS compared to SS. H:L ratio was similar in CB and NIC reared either as SS or MS. Feed intake followed this trend T1 > T3 > T2. CB gained more weight compared to NIC. Body weight gain was similar in the SS compared to MS. In conclusion, MS management system had a positive influence on the welfare of both breeds.

Parole chiave

  • behaviour
  • feeding
  • drinking
  • sitting
  • heterophil/lymphocyte ratio
  • indigenous chickens
  • social facilitation
  • tonic immobility
Accesso libero

Effect of zinc oxide on liveweight, reproductive organ dimensions and spermatozoa production of Archachatina marginata during dry season

Pubblicato online: 07 Apr 2019
Pagine: 147 - 154

Astratto

Abstract

Demand for Giant African Land Snail in Nigeria is so high such that it is very difficult to meet up with the supply as a protein source. However, during dry season, production at intensive level is often challenged with decline in growth and reproduction despite interventions to boost production. This study therefore evaluates the effect of zinc oxide on liveweight, reproductive organ dimensions and spermatozoa production of Giant African Land Snail (Archachatina marginata) during dry season. Thirty-two (32) snails with an average weight of 100 – 180 g were used for this experiment. The snails were allotted to four different feeding treatments which included concentrate diet only, concentrate +10 mg/kg of zinc oxide, concentrate +15 mg/kg of zinc oxide and concentrate +20 mg/kg of zinc oxide, respectively. Each treatment contained eight replicates. After nine weeks, five snails were selected from each treatment and dissected. Variables monitored were: weekly weight gain, shell circumference, shell length and shell diameter. Other reproductive data collected after dissections were: organ weight, reproductive tract weight, albumen weight, ovo-testis weight, gonado-somatic index (GSI) and spermatozoa concentration. The result showed that dietary zinc oxide significantly (P < 0.001) influenced feed intake, shell parameters, organ weight ovo-testis weight, albumen weight, gonado-somatic index, reproductive tract weight and spermatozoa concentration. Snailsfed zinc oxide supplemented diet had better shell measurements, organ weight, ovo-testis weight, albumen weight, gonadosomatic index and reproductive tract weight. Considering spermatozoa concentration, 10 mg/kg of zinc oxide inclusion into concentrate diet gave the highest concentration. The results of the present study showed that dietary zinc oxide positively influenced feed intake, shell measurements, organ weight, ovo-testis and albumen weight. Similarly, gonado-somatic index and spermatozoa production were also positively influenced. Therefore, 10 mg/kg inclusion of zinc oxide is recommended for better reproductive tract development, and spermatozoa production at the desirable economic level during the dry season production of Archachatina marginata.

Parole chiave

  • aestivation
  • snail
  • feeding
  • growth
  • reproductive tract
  • spermatozoa
  • Nigeria
Accesso libero

Farmers’ proclivity to use soap opera for sourcing agricultural information in Southwest Nigeria

Pubblicato online: 07 Apr 2019
Pagine: 155 - 163

Astratto

Abstract

Given the soap opera’s potential to engender behaviour learning and meet the information needs of farmers, this paper sought to establish farmers’ propensity to use soap opera for sourcing agricultural information in Southwest Nigeria. A multi-stage sampling procedure was used to draw representative samples (150 farmers) in this study. Using interview schedule, data were elicited on farmers’ personal characteristics, awareness about the use of soap opera, perceived benefits of soap opera and proclivity to use it for sourcing agricultural information. Data were analysed using descriptive (frequencies, percentages, means) and inferential (Chi-square and PPMC) statistics at P = 0.05. Farmers’ age, years of schooling and household size were 52.1 ± 11.4 years, 10.5 ± 4.6 years and 5.9 ± 2.4 persons, respectively. Majority of the farmers (86.0%) had heard about soap opera and 76.0% heard of different soaps in the last couple of years and more than half (53.3%) had heard of different soaps from both radio and television. However, 90.7% did not know any kind of soap opera that was used to promote agriculture. More than half of the farmers (56.7%) had high inclination for sourcing agricultural information using soap opera. There was a significant correlation between farmers’ perceived benefits (r = 0.36; P = 0.00) and proclivity to use soap opera for sourcing agricultural information. Farmers’ positive proclivity to use soap implies that soap opera strategy has potentials to benefit farmers as a source of agricultural information; therefore, soap opera should be considered as veritable avenue for agricultural information dissemination in Southwest Nigeria.

Parole chiave

  • radio
  • television
  • soap opera awareness
  • perceived benefits
Accesso libero

Determinants of food price volatility in Nigeria

Pubblicato online: 07 Apr 2019
Pagine: 165 - 174

Astratto

Abstract

In this paper we examined the determinants of food price volatility in Nigeria using monthly data from January, 1997 to April, 2017. We employed the multivariate GARCH approach to evaluate the level of interdependence and the dynamics of volatility across these markets. In particular, the Baba-Engle-Kraft-Kroner (BEKK) model and the Dynamic Conditional Correlation (DCC) model were used for estimation. The findings showed that information shocks originating in Consumer Price Indices (CPI), lending rate, exchange rate and oil market have a direct effect on the current conditional volatility in food market while the information shocks originating in food have a direct effect on the current conditional volatility in all the markets considered except for oil. These results were insensitive to changes in data frequency and different oil price specification. Hence, the government should encourage the use of alternative sources of energy to reduce the effect of high oil prices on food prices and provide soft agricultural credit scheme to farmers with a low lending rate through specialized banks.

Parole chiave

  • price volatility
  • inflation rate
  • exchange rate
  • oil prices
  • interest rate
  • multivariate GARCH models

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