- Title
- Fossil Shell Flour supplementation in the diet of Dohne Merino rams: effects on feed acceptability and heat stress tolerance
- Creator
- Mwanda, Lwazi https://orcid.org/0000-0001-9503-6150
- Subject
- Sheep--Feeding and feeds
- Subject
- Animal feeding
- Subject
- Fossils
- Date
- 2020-02
- Type
- Master's theses
- Type
- text
- Identifier
- http://hdl.handle.net/10353/22567
- Identifier
- vital:52464
- Description
- The objective of the current study was to evaluate the effects of feeding Dohne Merino rams with various inclusion levels of Fossil Shell Flour (FSF) as an additive supplement on feed preference and heat tolerance response of Dohne Merino rams. The FSF is used as an animal feed additive and is known to be rich in minerals. A total of twenty-four Dohne Merino rams (average 19.8 ± 0.43 kg body weight) were used to determine the feed preference of varying inclusion levels fossil shell flour (0g FSF/kg, 20g FSF/kg, 40g FSF/kg and 60g FSF/kg). The preference was assessed using feed intake and coefficient of preference. The feed intake, co-efficient of preference and physical attributes of feed (such as colour, smell and texture) was measured. The feed intake and coefficient of preference were higher in rams supplemented 60g FSF/kg (P < 0.05). The physical attributes of the experimental diets were adjudged based on the colour, smell and texture. The colour of experimental diets were brown in 0g FSF/kg while in 20g FSF/kg, 40g FSF/kg and 60g FSF/kg the colour of experimental diets were light brown (P< 0.05). All the experimental diets had a pleasant smell (P< 0.05). The texture of diets with 0g FSF/kg was moderately firm while diets 20g FSF/kg, 40g FSF/kg and 60g FSF/kg had a firm texture. The order of preference of diets supplemented with fossil shell flour in terms of feed intake by Dohne Merino rams was: 60g FSF/kg > 40g FSF/kg > 20gFSF/kg > 0g FSF/kg. In the second experiment, a total of twenty-four (n=24) Dohne Merino rams of about 8 to 9 months old, weighing 19.8 ± 0.43 kg were confined in individual pens for a period of 100 days. The rams were subjected to four varying inclusion levels of fossil shell flour (0g/kg, 20g/kg, 40g/kg and 60g/kg. Water and feed intake were recorded throughout the period of successive feeding. Blood samples were collected on days 0, 45 and 90. The parameters studied included the average daily water intake (ADWI), average feed intake (ADFI), skin temperature (ST), respiration rate (RR), pulse rate (PR), rectal temperature (RT), total plasma protein (TPP), mean corpuscular hemoglobin concentration (MCHC) and mean corpuscular volume (MCV). The inclusion levels of FSF affected both the ADWI and ADFI, showing a high-water intake and feed intake in rams subjected to 40g/kg of FSF followed by 60g FSF/kg, 20g FSF/kg and 0g FSF/kg (P< 0.01) respectively. All the physiological parameters ST, RT, RR, HR and PR decreased with an increase in the inclusion levels of FSF (P< 0.01). The TPP increased as the levels of FSF increases (P< 0.01). The MCHC was low in rams subjected to 60g FSF/kg and in 0g to 40g FSF/kg TPP increases as levels of FSF increases (P< 0.01). This study concluded that supplementing with various inclusion levels of FSF had a positive effect on feed preference. The FSF also showed the ability to mitigate heat stress in Dohne Merino rams.
- Description
- Thesis (MSc) -- Faculty of Science and Agriculture, 2020
- Format
- computer
- Format
- online resource
- Format
- application/pdf
- Format
- 1 online resource (xvi, 111 pages)
- Format
- Publisher
- University of Fort Hare
- Publisher
- Faculty of Science and Agriculture
- Language
- English
- Rights
- rights holder
- 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 | Mwanda - Dissertation FINAL March2022....docx.pdf | 1 MB | Adobe Acrobat PDF | View Details |