Diet digestibility in growing rabbits: effect of origin and oxidation level of dietary fat and vitamin e supplementation.

Casado, C.; Moya, Victor; Fernández, Carlos; Pascual, Juan José Montero; Blas, E.; Cervera, C.

doi:10.4995/wrs.2010.18.08

Cited by 17 publications

(13 citation statements)

References 13 publications

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“…These results were expected because of the moderate amounts of dietary fat supplementation used in the present study (15 g/kg). Fernández et al (1994) and Casado et al (2010) using a greater amount (30 g/kg) of supplementation with different fat sources varying in the ratios of saturated/unsaturated FA did not observe any difference on nutrient digestibility in fattening rabbits. Nevertheless, Dalle Zotte et al (2013) observed a slight decrease of the apparent digestibility coefficient of ether extract in 11-week-old rabbits due to the increase of PUFA content (20 g/kg) in diets supplemented with Spirulina meal.…”

Section: Discussionmentioning

confidence: 81%

Reproductive long-term effects, endocrine response and fatty acid profile of rabbit does fed diets supplemented with n-3 fatty acids

Rebollar

García-García

Arias-Álvarez

et al. 2014

Animal Reproduction Science

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a b s t r a c tThe effect of a diet enriched with polyunsaturated n-3 fatty acids (PUFA) on endocrine, reproductive, and productive responses of rabbit females and the litters has been studied. Nulliparous does (n = 125) were fed ad libitum from rearing to second weaning two diets supplemented with different fat sources: 7.5 g/kg lard for the control diet (group C; n = 63) or 15 g/kg of a commercial supplement containing a 50% ether extract and 35% of total fatty acids (FAs) as PUFA n-3 (Group P; n = 62). Dietary treatments did not affect apparent digestibility coefficients of nutrients, or reproductive variables of does including milk production, mortality and average daily gain of kits over two lactations. However, on Day 5 and 7 post-induction of ovulation, progesterone of Group P tended to increase to a greater extent than in does of Group C. Total PUFAs, n-6 and n-3 and eicosapentanoic (EPA) contents were greater in adipose tissues of does in Group P than in Group C. Docosapentaenoic acid (DPA), EPA, and docosahexaenoic acid (DHA) concentrations were greater in peri-ovarian than in scapular fat with abdominal fat being intermediate in concentration. In PUFA supplemented does, kit mortality at the second parturition tended to be less than in control does. Also, kits born to does of the PUFA-supplemented group weighed more and were of greater length than from does of control group. In conclusion, effectiveness of dietary intervention on reproductive and performance response is greater in the second parity, which suggests an accumulative long-term beneficial effect of n-3 FA supplementation in reproductive rabbit does.Published by Elsevier B.V.

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Section: Discussionmentioning

confidence: 81%

Reproductive long-term effects, endocrine response and fatty acid profile of rabbit does fed diets supplemented with n-3 fatty acids

Rebollar

García-García

Arias-Álvarez

et al. 2014

Animal Reproduction Science

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“…Moreover, relevant changes in digestive physiology occur around weaning when solid intake begins (17-18 d old) and diet has a great influence (Soler et al, 2005), although the effect of dietary fatty acids profile (Eiben et al, 2010) and oxidation level (Casado et al, 2011) seem to be moderate, and Casado et al (2010) found no differences in the digestibility coefficient between diets including different PUFA sources.…”

Section: Introductionmentioning

confidence: 89%

“…In the first study (fattening trial) a total of 1670 (585±4 g) weaned rabbits aged 28 d were randomly housed: 750 in individual cages (150 per treatment) and 920 in collective cages (184 per treatment; 8 rabbits/cage) and had free access to one of the experimental diets from 28 to 63 d of age. Daily weight gain (DWG) Casado et al (2010). World Rabbit Sci.…”

Section: Animal and Experimental Proceduresmentioning

confidence: 99%

Dietary fatty acid profile: effects on caecal fermentation and performance of young and fattening rabbits

et al. 2013

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The present work was performed to study the effect of dietary inclusion of different fatty acid combinations (saturated, n-3 and n-6 polyunsaturated fatty acids; PUFA) on caecal fermentation activity, feed intake, growth rate and feed efficiency of young rabbits around weaning (17 to 44 d) and fattening rabbits (28 to 63 d of age). Five diets were formulated using the same raw materials and including 3% of lard (A diet, rich in saturated fat), sunflower oil (S diet, rich in n-6 PUFA), linseed oil (L diet, rich in n-3 PUFA), sunflower oil and lard at 1:1 rate (SA diet), or linseed oil and lard at 1:1 rate (LA diet). In the first trial, the effect of the 5 diets on rabbit performance was evaluated in a fattening period from 28 to 63 d of age, with 490 rabbits allocated in individual cages; mortality rates were measured with 1670 rabbits (750 allocated in individual cages and 920 in collective cages, 8 rabbits/cage). In the second trial, 120 young rabbits were used from 17 to 44 d of age, weaned at 28 d, allocated in collective cages and randomly fed with A, S or L diets, evaluating performance and gut weight and caecum fermentation activity. The use of animal fat or vegetable oil and the richness in n-3 or n-6 PUFA of vegetable oils had no significant effect on the feed intake (130 g dry matter/d) and growth rate of fattening rabbits (45.5 g/d), but the inclusion of sunflower oil in diet improved feed conversion rate (2.79 for S diet vs. 2.87 for the rest of diets; P<0.01). Mortality rate was lower when vegetable oils were included in diet (34 and 37% for S and L diets respectively vs. 45% for A diet; P<0.05). Feed intake and growth rate increased quickly from 17 to 44 d, but only small occasional differences were recorded in growth rate of young rabbits, in favour of rabbits receiving animal fat from 17 to 21 d (P<0.05) or sunflower oil from 28 to 30 d (P<0.05). Caecal traits of rabbits at 30 and 44 d of age were similar for the different dietary groups, although butyric acid concentration in caecum content at 44 d was the lowest (P<0.05) with L diet.

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“…The lipid oxidation degree of oil did not affect digestibility of nutrients in pigs (Derouchey et al, 2000) or rabbits Casado et al, 2010), and Zdunczyk et al (2000) described a lower fat digestibility only when high-oxidised fats (200 meq O 2 /kg and ρ-anisidine value of 96) were included at 10% in diet for rats, but not affecting feed intake and body weight gain. Effects of oxidised fats on animal performance also seem to be related with their oxidation degree and inclusion level.…”

Section: Introductionmentioning

confidence: 99%

“…The peroxidised (P) and highly oxidised (O) oils were obtained from fresh (F) sunflower oil (peroxide value of 10 meq O 2 /kg oil and ρ-anisidine value of 3) by 2 heat treatments (55°C for 11 d or 140°C for 31 h, respectively; see Casado et al, 2010) which increased the content of primary oxidation compounds (P oil), as was reflected in a peroxide value of 83 meq O 2 / kg oil without variation of ρ-anisidine value, or induced the formation of secondary oxidation compounds and polymerisation reactions (O oil), reaching a ρ-anisidine value of 125, 10% of polymerised triacylglycerols and 1.9 g/kg oil of total trans-fatty acids. Immediately after the heat treatments, butyl-hydroxytoluene was added to the oils at 100 mg/kg for their stabilisation, avoiding further oxidation.…”

Section: Experimental Oils and Dietsmentioning

confidence: 99%

Effect of oxidation state of dietary sunflower oil and dietary zinc and α -tocopheryl acetate supplementation on performance of fattening rabbits

et al. 2011

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Twelve diets were formulated using the same raw materials and including 3% of sunflower oil at 3 different oxidation levels [fresh (F), peroxidised (P; 55°C for 11 d; 83 meq O 2 /kg oil) and highly-oxidised (O; 140°C for 31 h; ρ-anisidine value of 125)], with 2 levels of α-tocopherol supplementation (0 and 100 ppm), and 2 levels of Zn supplementation (0 and 200 ppm). A trial with 900 growing rabbits was carried out in order to study the effect of the oxidation and protection level of supplemented oil on the performance of animals from weaning (28 d) to 63 d of age. Another coetaneous trial was performed to study the effect of the oxidation level of sunflower oil (F, P and O) on caecal activity around weaning, using 120 suckling rabbits randomly re-allocated into 12 litters of 10 kits (4 litters per diet) from 17 to 44 d of age. Four rabbits per litter were slaughtered at 30 and 44 d (16 rabbits/treatment and age). Full gastro-intestinal tract and caecum were weighed and pH, dry matter (DM), ammonia nitrogen (NH 3 ) and volatile fatty acids concentration (VFA) values in caecal content were measured. No effect was observed either in the mortality rate, body weight gain, feed intake or conversion rate throughout the growing period when peroxidised or oxidised oils were included in the diet, being on average 32%, 45.1 g/d, 107.6 g DM/d and 2.44, respectively. Dietary supplementation with α-tocopherol and/or Zn had no effect on the mortality rate, feed intake and performance of rabbits during the fattening period. Daily weight gain just after weaning (28 to 30 d of age) was higher for kits receiving the diet supplemented with F and O diets than those with the P diet (55, 50 and 35 g/d, respectively; P<0.05), but no further effect on performance was observed. Young rabbits fed with the P diet showed lower DM percentage in caecum at 30 d of age (-9.5%; P<0.05) than those with F or O diets. Caecum of young rabbits fed with the O diet presented lower NH 3 content at 30 d of age that those given F diet (-38%; P<0.05) and higher total VFA and acetic acid concentration (+36 and +34 %, respectively; P<0.05). Therefore, and although many questions are still open, oxidised oils could be considered as a possible energy source for rabbit nutrition.

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Diet digestibility in growing rabbits: effect of origin and oxidation level of dietary fat and vitamin e supplementation.

Cited by 17 publications

References 13 publications

Reproductive long-term effects, endocrine response and fatty acid profile of rabbit does fed diets supplemented with n-3 fatty acids

Reproductive long-term effects, endocrine response and fatty acid profile of rabbit does fed diets supplemented with n-3 fatty acids

Dietary fatty acid profile: effects on caecal fermentation and performance of young and fattening rabbits

Effect of oxidation state of dietary sunflower oil and dietary zinc and α -tocopheryl acetate supplementation on performance of fattening rabbits

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