Characteristics of Angora Rabbit Fibre 2 -the Influence of the Methionine Content in Feed and of the Environmental Temperature on Fibre and Medulla Diameter in Angora Wool

Herrmann, Stefan; Lange, Klaus; Wortmann, Franz

doi:10.4995/wrs.1996.288

Cited by 3 publications

(5 citation statements)

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“…However, fiber diameter and pure fiber were lower in winter and increased during summer and rainy seasons. Herrmann et al (1996) reported that Angora fiber yield and quality are influenced by environmental conditions. Doppler et al (1984) observed lower wool yield in Angora rabbits at higher environmental temperature and was related to the higher fiber density and the longer fiber in colder climates compared to warmer ones.…”

Section: Biological Performance and Wool Qualitymentioning

confidence: 99%

“…Doppler et al (1984) observed lower wool yield in Angora rabbits at higher environmental temperature and was related to the higher fiber density and the longer fiber in colder climates compared to warmer ones. However, the extent of dependence of this effect on the temperature alone or on other environmental components was unknown (Herrmann et al, 1996). Rochambeau and Thebault (1990) reported longer bristles and dawn during winter than summer clipping.…”

Section: Biological Performance and Wool Qualitymentioning

confidence: 99%

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Seasonal Production Performance of Angora Rabbits under Sub-temperate Himalayan Conditions

Bhatt¹,

Sharma²

2009

Asian Australas. J. Anim. Sci

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An experiment of one-year duration was conducted on sixteen adult male German Angora rabbits under sub-temperate Himalayan conditions, to assess the effect of seasons on their body weight, wool production and quality, plane of nutrition and the digestibilities of nutrients. The daily meteorological attribute viz. minimum and maximum temperature; relative humidity and rainfall were recorded during winter (October to March), summer (April to June) and rainy (July to September) seasons. Biological parameters viz. body weight at the time of shearing, wool yield of individual rabbit, quality attributes of wool, fortnightly dry matter intake, chemical composition of feed and fodder and digestibilities of nutrients were recorded. Average minimum and maximum ambient temperature during winter, summer and rainy seasons were 4.6±1.9 and 21.4±2.8; 13.6±2 and 30.3±2; and 20.0±1.4 and 31.0±1.8°C, respectively. The average relative humidity and total rainfall during winter, summer and rainy season were 69.5±2.9% and 74.7±21.8 mm; 58.6±2.2% and 38.1±18.1 mm; and 69±4.2% and 104.0±43.7 mm, respectively. The body weight of rabbits increased during all seasons, however, the maximum average daily weight gain of 3.47±0.1 g was observed during the rainy season. The wool yield differed significantly (p≤0.05) among different seasons with highest (140.4±10 g) and lowest (108.5±6.9 g) during winter and summer, respectively. The wool yield during the rainy season was 123.3±5.2 g. The wool quality attributes revealed non-significant differences for staple length, fiber diameter, medulation percent, percent pure fibers and percent guard hairs. Plane of nutrition revealed significant (p≤0.05) differences for concentrate intake. The concentrate intake was highest during winter (124.4±2.6 g) followed by summer (86.8±8.9 g) and rainy (80.7±11.8 g) seasons. The reverse trend was observed in roughage intake with significantly (p≤0.05) lower intake during winter and highest during summer months. As a result total dry matter intake during different seasons was similar. Significant differences (p≤0.05) were observed for digestibilities of crude protein, crude fiber, ether extract, acid detergent fiber and cellulose. Digestibility of crude protein was highest during winter whereas the digestibilities of crude fiber, ether extract, acid detergent fiber and cellulose remained higher during the rainy season. During the winter season, the dry matter used for producing 100 g of wool was substantially lower than during other seasons and was concluded to be the best season for production of Angora wool under subtemperate Himalayan conditions.

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Section: Biological Performance and Wool Qualitymentioning

confidence: 99%

Section: Biological Performance and Wool Qualitymentioning

confidence: 99%

Seasonal Production Performance of Angora Rabbits under Sub-temperate Himalayan Conditions

Bhatt¹,

Sharma²

2009

Asian Australas. J. Anim. Sci

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“…The diameter of hair fibre is an important parameter in the textile processing process, which is affected by the dietary Met level. Dietary Met supplementation significantly increased the fiber diameter and improved the wool quality of Angora rabbits [ 13 ]. The addition of Met to LP increases the down diameter and improves the fur quality of blue foxes [ 14 ].…”

Section: Discussionmentioning

confidence: 99%

Dietary methionine supplementation to a low-protein diet improved hair follicle development of Angora rabbits

Zhao¹,

Wang²,

Wang³

et al. 2023

Anim Biosci

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Angora rabbits fed a low-protein diet exhibit decreased hair production performance. This study set out to evaluate the effects of methionine on hair properties and nitrogen metabolism in Angora rabbits fed a low-protein diet and investigated the gene expression related to hair follicle development to determine the possible molecular mechanism of methionine effects on hair follicle development. MethodsAn experiment was conducted to investigate the effects of DL-methionine addition on a low-protein diet on hair development in Angora rabbits. Angora rabbits were divided into 5 groups: fed a normal diet (control), fed a low-protein diet (LP), or fed an LP supplemented with 0.2%, 0.4%, or 0.6% DL-methionine (Met). ResultsThe results showed that rabbits in the LP group had lower wool yield than the control rabbits, but the addition of 0.4%-0.6% Met to LP attenuated these effects (P<0.05).

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“…Methionine supplementation of up to 4 g/day improved neither the quantity nor quality of fibre produced by alpacas. In other fibre‐producing species, fibre production has been enhanced when the diet was supplemented with rumen‐protected methionine (Cottle, 1988; McGregor and Hodge, 1989; Stephenson et al., 1991; Herrmann et al., 1996; Galbraith, 2000; White et al., 2000; Wiese et al., 2003). It is therefore surprising that feeding rumen‐protected methionine to alpacas had no effect on fibre production.…”

Section: Discussionmentioning

confidence: 99%

“…Due to the high demand for sulphur‐containing amino acids for fibre production, supplemental forms of rumen‐protected sulphur‐containing amino acids have been developed for feeding the fibre‐producing animals. Sheep, goats and Angora rabbits that have been selectively bred for fibre production have shown increases in fibre growth when fed maintenance diets and supplemented with sulphur‐containing amino acids (McGregor and Hodge, 1989; Stephenson et al., 1991; Mata et al., 1995; Herrmann et al., 1996; Galbraith, 2000; White et al., 2000; Wiese et al., 2003). As alpaca fibre and sheep wool have a similar sulphur content, it would be predicted that alpacas would present a similar response to supplementation (Elvestad et al., 2007).…”

Section: Introductionmentioning

confidence: 99%

Rumen‐protected methionine supplementation and fibre production in alpacas (Vicugna pacos)

Moore

Maloney

Vaughan³

et al. 2012

Animal Physiology Nutrition

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Sulphur-containing amino acids are a crucial requirement for fibre production and may be supplemented in the diet of fibre-producing animals to stimulate fibre growth. The alpaca fibre industry is a developing industry in Australia with high variability in fibre production. To date, there is no evidence whether supplementing the diet of alpacas with sulphur amino acids improves fibre production. We hypothesised that supplementation with the rumen-protected sulphur amino acid, methionine would increase fibre growth in alpacas. Three groups of eight huacaya alpaca wethers were fed daily a maintenance diet supplemented with 0, 2 or 4 g of rumen-protected methionine for 7 weeks. Fibre samples were taken at the beginning and end of the study with a blood sample taken by jugular venipuncture prior to feeding on the first day of each week. Methionine supplementation had no effect on fibre diameter (p = 0.92), fibre length (p = 0.91) or fibre yield (p = 0.33). The change of season over the study affected plasma glucose (p < 0.001), plasma urea nitrogen (p < 0.001) and fibre diameter (p < 0.001). The indifference between groups may be due to the maintenance diet supplying sufficient levels of methionine, the lack of genetic potential of the experimental animals to respond to additional methionine or that the supplemental methionine was not protected in alpacas and deaminated for glucose production.

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Characteristics of Angora Rabbit Fibre 2 -the Influence of the Methionine Content in Feed and of the Environmental Temperature on Fibre and Medulla Diameter in Angora Wool

Cited by 3 publications

References 0 publications

Seasonal Production Performance of Angora Rabbits under Sub-temperate Himalayan Conditions

Seasonal Production Performance of Angora Rabbits under Sub-temperate Himalayan Conditions

Dietary methionine supplementation to a low-protein diet improved hair follicle development of Angora rabbits

Rumen‐protected methionine supplementation and fibre production in alpacas (Vicugna pacos)

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