Digestibility and nitrogen utilisation of diets containing protein at different levels and supplemented with dl-methionine, l-methionine and l-lysine in blue fox (Alopex lagopus)

Dahlman, Tuula; Kiiskinen, Tuomo; Makela, J.; Niemelä, Paavo; Syrjälä-Qvist, Liisa; Valaja, Jarmo; Jalava, Taina

doi:10.1016/s0377-8401(02)00029-9

Cited by 29 publications

(53 citation statements)

References 8 publications

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“…The values of digestibility coefficients, previously presented, can be considered typical of growing Arctic foxes aged four to five months, despite statistically significant differences between the control and experimental groups. These results are also consistent with the findings of other authors, regarding Arctic foxes Skrede, 1995, 1998;Gugołek et al, 1997;Lorek et al, 1999Lorek et al, , 2002Ahlstrom et al, 2000;Szymeczko, 2001;Dahlman et al, 2002;Matusevicius et al, 2004;Vhile et al, 2005a,b). Table 4 shows daily balance and retention of nitrogen.…”

Section: Resultssupporting

confidence: 92%

“…Fat utilization is generally high in fur-bearing animals, particularly with respect to unsaturated fatty acids found, among others, in raw poultry offal, poultry meals, and fat. Also in the studies conducted by Dahlman et al (2002) and Ahlstrom et al (2003), fat digestibility coefficients exceeded 90%. Gross energy digestibility was higher in the experimental group, which resulted from higher digestibility of individual nutrients.…”

Section: Resultsmentioning

confidence: 88%

“…Ahlstrom et al (2000) and Vhile et al (2005b) also observed lower protein digestibility for diets containing meat meal. The digestibility coefficient of protein contained in standard mixed feed for foxes ranges from 78 to 86%, and usually exceeds 80% (Dahlman et al, 2002;Ahlstrom et al, 2003;Vhile et al, 2005b). …”

Section: Resultsmentioning

confidence: 99%

“…In a previous study (Gugołek et al, 1997), there were no statistically significant differences in nitrogen retention between conventional feed and dry pellets. In an experiment performed by Dahlman et al (2002), nitrogen retention relative to nitrogen intake ranged from 14.1 to 29.2 and from 16.3 to 27.7%, while nitrogen retention in relation to nitrogen digestion -from 17.0 to 37.0 and from 19.8 to 36.7%. Similar values regarding nitrogen retention were reported by Matusevicius et al (2004).…”

Section: Resultsmentioning

confidence: 99%

“…The nutrient content of feed and feces and the nitrogen content of urine were determined by the Weenden method (Official..., 1990). Nutrient digestibility and nitrogen retention were determined by standard methods (Gugołek et al, 1997;Dahlman et al, 2002;Ahlstrom et al, 2003;Matusevicius et al, 2004). The apparent digestibility (AD) of nutrients was calculated as follows: AD=a-b/a, in which "a" is nutrient intake from feed and "b" is nutrient excretion in feces.…”

Section: Methodsmentioning

confidence: 99%

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Nutrient digestibility in Arctic fox (Vulpes lagopus) fed diets containing animal meals

Gugołek

Zabockłi

Kowalska

et al. 2010

Arq. Bras. Med. Vet. Zootec.

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Three digestibility experiments on Arctic foxes were carried out. Control groups were fed standard diets (C1 and C2) composed of fresh or frozen animal by-products and steamed ground grain. Dry experimental diets (E1 and E2) contained animal meals, extracted meals and fat, were mixed with water prior to administration. In a preliminary experiment, the digestibility of dry diet E1 moistened with water for 15min and 24h was compared to determine the optimum moistening time during the experimental period proper. The preliminary experiment showed that moistening time had no significant effect on digestibility. In the main experiment, two independent digestibility trials were performed to compare the digestibility of diets fed to foxes during growth (C1 vs. E1) and fur development (C2 vs. E2). Better nutrient digestibility was noted for control diets, compared to experimental. The greatest differences were reported for total protein digestibility. Protein contained in meals undergoes denaturation during heat treatment, which reduces digestibility. It was found that the retention of nitrogen in relation to nitrogen digestion was higher in foxes fed experimental diets (E1 and E2). Keywords: Vulpes lagopus, feeding, digestibility, animal meal RESUMO Realizaram-se três ensaios de digestibilidade em raposas polares. Os grupos controles receberam dietaspadrão (C1 e C2) compostas por subprodutos de origem animal frescos ou congelados e sementes de cereais em grão. As dietas secas (E1, E2) usadas nos ensaios que continham farinha de origem animal e sementes em grãos extrudadas eram hidratadas antes de administradas. Em ensaio preliminar, avaliouse a digestibilidade da dieta seca E1, submetida a 15 minutos e a 24 horas de hidratação. Verificou-se que o tempo de hidratação não influenciou a digestão. No experimento principal, foram realizados dois ensaios para comparar a digestibilidade das dietas fornecidas às raposas no período de crescimento (C1 vs E1) e no desenvolvimento de pelo (C2 vs E2

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Nutrient digestibility in Arctic fox (Vulpes lagopus) fed diets containing animal meals

Gugołek

Zabockłi

Kowalska

et al. 2010

Arq. Bras. Med. Vet. Zootec.

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Sanguinarine improved nutrient digestibility, hepatic health indices and productive performance in laying hens fed low crude protein diets

Bavarsadi

Mahdavi

Ansari‐Mahyari

et al. 2021

Veterinary Medicine & Sci

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Carnivorous mammals: nutrient digestibility and energy evaluation

2010

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Estimating the energy content is the first step in diet formulation, as it determines the amount of food eaten and hence the concentration of nutrients required to meet the animal's requirements. Additionally, being able to estimate the energy content of a diet empirically known to maintain body condition in an animal will facilitate an estimation of maintenance energy requirements. We collated data on nutrient composition of diets fed to captive wild canids, felids, hyenids, mustelids, pinnipeds, and ursids and the digestibility coefficients from the literature (45 species, 74 publications) to test whether differences in protein and fat digestibility could be detected between species groups, and whether approaches suggested for the estimation of dietary metabolizable energy (ME) content in domestic carnivores (NRC [2006] Nutrient requirements of dogs and cats. Washington, DC: National Academy Press.) can be applied to wild carnivores as well. Regressions of digestible protein or fat content vs. the crude protein (CP) or fat content indicated no relevant differences in the digestive physiology between the carnivore groups. For diets based on raw meat, fish, or whole prey, applying the calculation of ME using "Atwater factors" (16.7 kJ/g CP; 16.7 kJ/g nitrogen-free extracts; 37.7 kJ/g crude fat) provided estimates that compared well to experimental results. This study suggests that ME estimation in such diets is feasible without additional digestion trials. For comparative nutrition research, the study implicates that highly digestible diets typically fed in zoos offer little potential to elucidate differences between species or carnivore groups, but research on diets with higher proportions of difficult-to-digest components (fiber, connective tissues) is lacking.

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Digestibility and nitrogen utilisation of diets containing protein at different levels and supplemented with dl-methionine, l-methionine and l-lysine in blue fox (Alopex lagopus)

Cited by 29 publications

References 8 publications

Nutrient digestibility in Arctic fox (Vulpes lagopus) fed diets containing animal meals

Nutrient digestibility in Arctic fox (Vulpes lagopus) fed diets containing animal meals

Sanguinarine improved nutrient digestibility, hepatic health indices and productive performance in laying hens fed low crude protein diets

Carnivorous mammals: nutrient digestibility and energy evaluation

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