- Title
- Investigating communal farmer’s perceptions on production practices and evaluating pre-slaughter responsiveness of extensively reared Boran and Nguni steers
- Creator
- Guzi, Anelisa https://orcid.org/0000-0001-5568-3396
- Subject
- Boran cattle
- Subject
- Nguni cattle
- Subject
- Cattle breeds
- Date
- 2020-01
- Type
- Master's theses
- Type
- text
- Identifier
- http://hdl.handle.net/10353/22721
- Identifier
- vital:52672
- Description
- This study's overall objective was to investigate communal farmers' perceptions on production practices and evaluate pre-slaughter responsiveness of extensively reared Boran and Nguni steers. On objective one farmers’ knowledge and perceptions on cattle breeds, management, and marketing channels in selected villages of Alice, Eastern Cape, South Africa were evaluated. Interviews were conducted using a structured questionnaire divided into demographic information and relevant cattle production practices, following a snowball technique to select 101 cattle-keeping households from Gaga, Ntselamanzi, and Ncerha villages. Most of the interviewed cattle farmers were males (65percent), in the age range of 40-60 years, with a primary-matric educational level. Among others, they highlighted financial security (47percent) and traditional ceremonies (26percent) as the reasons for keeping cattle. Most dominant in their herds were the Boran (49percent) and crossbreds (23percent) reared extensively with some supplementation (nutritional and medicinal). Their breed selection was based on disease and tick tolerance, temperament, and product (milk and meat) quality. It was noted that most of the interviewed cattle owners have the basic knowledge of good management practices, breed differences, and marketing chains. They related to low productivity to diseases, lack of knowledge, and poor resources. On the second objective pre-slaughter blood-based stress indicators and their subsequent effects were evaluated on beef quality of extensively reared Nguni and Boran steers . Twenty steers (10 Nguni and 10 Boran) aged 18 months were divided into two groups (with 5 of each breed per group) and transported from the University of Fort Hare Honeydale farm to the East London abattoir in the morning and afternoon trips. Upon arrival at the abattoir, the steers were held in lairage units for 24 hours (group 1) and 16 hours (group 2) until slaughter. Blood samples were drawn using a needle and vacutainer tubes from each steer's jugular vein at the farm before transportation, upon arrival at the abattoir, and during slaughter to perform cortisol, glucose, and routine haematological analysis. M. longissimus dorsi samples were harvested on the left side of each carcass to measure the meat quality attributes. Interactions between the observed production-stage activities, breeds, and physiological changes of these steers were recognized; with cortisol and glucose increasing (P ≤ 0.05) during transportation (4.15±0.46 ng/mL and 5.35±0.46nmol/L respectively) and also with farm group 1 showing higher cortisol (42.62±14.47 ng/mL) than the second group. Furthermore, all steers that were in slaughter group 1 showed less cortisol (101.49±14.47 ng/mL) and glucose (6.50±14.47 nmol/L) levels than those in group 2. In addition, Boran steers had higher packed cell volume, erythrocyte count, and haemoglobin values (33.27±0.54 percent, 7.66±0.19 106 μL, and 11.15±0.16 g/dl respectively) compared to Nguni steers in all production-stages. Later in the experiment, the effect of breed type, production stage activities (farm handling, transportation, and lairage duration), and stress responsiveness on some meat quality parameters (pH, lightness (L*), redness (a*), yellowness (b*), hue, Chroma, thawing and cooking loss, and tenderness) collected from the steers were measured. It was observed that the group lairaged for 16 hours produced the highest L* value (36.25±0.88) compared to those lairaged for 24 hours. As for the b* and hue of the meat, there were positive interactions between the breed type and the production stages (p<0.05). Lastly, cooking loss and tenderness were significantly affected by the breed type in all groups, with Nguni having the most tender meat (24.06±1.39 percent) and less cooking loss (16.92±1.33 percent) than Boran breeds. Therefore, the production stage conditions and breed type influenced some physiological stress-indicators and meat quality of Boran and Nguni steers raised on natural pastures. However, there were not many differences observed between the groups and breeds.
- Description
- Thesis (MSc) -- Faculty of Science and Agriculture, 2020
- Format
- computer
- Format
- online resource
- Format
- application/pdf
- Format
- 1 online resource (136 leaves)
- Format
- Publisher
- University of Fort Hare
- Publisher
- Faculty of Science and Agriculture
- Language
- English
- Rights
- University of Fort Hare
- Rights
- All Rights Reserved
- Rights
- Open Access
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UFH Department of Livestock & Pasture Science
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details | SOURCE1 | Anelisa Guzi 2022.pdf | 1 MB | Adobe Acrobat PDF | View Details |