The effect of phosphorus restriction during the weaner-grower phase on compensatory growth, serum osteocalcin and bone mineralization in gilts

Varley, P.F.; Sweeney, T.; Ryan, M. F.; O’Doherty, John V.

doi:10.1016/j.livsci.2010.07.025

Cited by 40 publications

(25 citation statements)

References 29 publications

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“…Each animal was fitted with a uniquely coded ear tag transponder and the identification circuit recorded the animal’s number. When the animal finished feeding and withdrew from the trough, the electronic system recorded the difference between the pre- and post-visit trough weight and the data were stored in a file with the pen number, the animal’s identification number, and the date and the time of entry and exit as described by Varley et al [17]. The recorded data were used to calculate the individual dietary intake.…”

Section: Methodsmentioning

confidence: 99%

Multi-Functional Roles of Chitosan as a Potential Protective Agent against Obesity

et al. 2013

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Chitosan, a natural polysaccharide comprising copolymers of glucosamine and N-acetylglucosamine, has been shown to have anti-obesity properties. Two experiments (Exp. 1 and Exp. 2) were performed to determine the role of chitosan on dietary intake, body weight gain, and fat deposition in a pig model, as well as identifying potential mechanisms underlying the anti-obesity effect of chitosan. In Exp. 1, the nutrient digestibility experiment, 16 pigs (n = 4/treatment) were randomly allocated to one of four dietary treatments as follows: 1) basal diet; 2) basal diet plus 300 ppm chitosan; 3) basal diet plus 600 ppm chitosan; 4) basal diet plus 1200 ppm chitosan. The main observation was that crude fat digestibility was lower in the 1200 ppm chitosan group when compared with the control group (P<0.05). In Exp. 2, a total of 80 pigs (n = 20/treatment) were offered identical dietary treatments to that offered to animals in Exp. 1. Blood samples were collected on day 0, day 35 and at the end of the experiment (day 57). Animals offered diets containing 1200 ppm chitosan had a lower daily dietary intake (P<0.001) and body weight gain (P<0.001) from day 35 to 57 when compared with all the other treatment groups. Animals offered diets containing 1200 ppm chitosan had a significantly lower final body weight (P<0.01) when compared with all the other treatment groups. The decreased dietary intake observed in the 1200 ppm chitosan group was associated with increased serum leptin concentrations (P<0.001) and a decrease in serum C-reactive protein (CRP) concentrations (P<0.05). In conclusion, the results of this study highlight novel endocrine mechanisms involving the modulation of serum leptin and CRP concentrations by which chitosan exhibits anti-obesity properties in vivo.

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Section: Methodsmentioning

confidence: 99%

Multi-Functional Roles of Chitosan as a Potential Protective Agent against Obesity

et al. 2013

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“…Each pen had a solid floor lying space with access to slats at the rear of pen. The pens were equipped with single space computerised feeders (Mastleistungsprufung MLP‐RAP; Schauer Agrotronic AG, Sursee, Switzerland), as described by Varley, Sweeney, Ryan, and O'Doherty (), which allowed individual ad libitum feeding and daily recording of dietary intake. Briefly, each animal was fitted with a uniquely coded ear tag transponder.…”

Section: Methodsmentioning

confidence: 99%

The effect of 25‐hydroxyvitamin D₃ and phytase inclusion on pig performance, bone parameters and pork quality in finisher pigs

Duffy

Kelly

Rajauria

et al. 2018

Animal Physiology Nutrition

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The objective of this study was to investigate the effects of supplementing both phytase and 25-hydroxyvitamin D (25-OH-D₃) on pig performance, nutrient digestibility, carcass characteristics, bone parameters and pork quality in finisher pigs. The experimental design was a 2 × 2 factorial comprising of four dietary treatments. One hundred and twenty pigs (60 male, 60 female) were blocked according to live weight and sex and allocated to the following dietary treatments: low P (4.81 g/kg) diet (basal) (T1); low P diet + phytase (T2); low P diet + 25-OH-D₃ (T3) and low P diet + phytase + 25-OH-D₃ (T4). Pigs supplemented with phytase had a lower average daily feed intake (ADFI) (2.45 kg vs. 2.59 kg; p < 0.05) and lower feed conversion ratio (FCR) (2.74 kg/kg vs. 2.85 kg/kg; p < 0.05) compared to pigs offered the nonphytase diets. Pigs offered phytase diets had a higher (p < 0.05) coefficient of apparent total tract digestibility (CATTD) of ash, phosphorous (P) and calcium (Ca) compared with pigs offered the nonphytase supplemented diets. Pigs offered the 25-OH-D diets had a higher CATTD of N and ash. Pigs offered the phytase diets had increased (p < 0.05) bone DM, ash, Ca, P and density compared to the nonphytase diets. There was a significant interaction (p < 0.05) between phytase and 25-OH-D on cook loss. Pigs offered 25-OH-D had increased cook loss over the basal diet; however, there was no effect on cook loss when phytase and 25-OH-D were offered in combination compared to the phytase only diet. Pigs offered 25-OH-D exhibited higher (p < 0.05) Warner Bratzler shear force values and lower (p < 0.05) pork lightness (L*) surface colorimeter values. In conclusion, there was no benefit to offering a combination of phytase and 25-OH-D on pig performance, bone parameters or pork quality.

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“…In fact, P, Ca and ash levels increased with available P in the diet, provided by the addition of dicalcium phosphate. Varley et al (2011) reported that ash, Ca, and P contents in metacarpus were greatest in pigs fed high P levels.…”

Section: Mineral Composition Of Bonementioning

confidence: 99%

Bone characteristics of pigs fed different sources of phosphorus

Teixeira

Corassa

Moreira

et al. 2016

Rev Colomb Cienc Pecu

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SummaryBackground: phosphorus supplementation should help to keep bone integrity and prevent fractures during the development and slaughter of animals. Objective: to evaluate the effect of different phosphorus sources on bone characteristics of pigs. Methods: one-hundred and twelve piglets (28.65 ± 2.82 Kg body weight) were distributed into an 8×2 factorial arrangement (eight sources of phosphorus × two sexes) in blocks in a completely randomized design. The diets were formulated on a total-phosphorus basis, with 0.32 and 0.31% of P for the control diet and 0.56 and 0.42% of P for the other treatments in the growth and finishing phases, respectively. Phosphorus was supplemented as dicalcium phosphate (DCP); mono-dicalcium phosphate (MDCP); triple superphosphate (TSP); single superphosphate (SSP); Catalão-rock phosphate (ROCK); a mixture of sources (MIX); phosphoric acid (PPA); and the control diet (CTR). Results: there was no interaction between phosphorus sources and sex in any of the parameters. Thickness of the compact tissue was the

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The effect of phosphorus restriction during the weaner-grower phase on compensatory growth, serum osteocalcin and bone mineralization in gilts

Cited by 40 publications

References 29 publications

Multi-Functional Roles of Chitosan as a Potential Protective Agent against Obesity

Multi-Functional Roles of Chitosan as a Potential Protective Agent against Obesity

The effect of 25‐hydroxyvitamin D₃ and phytase inclusion on pig performance, bone parameters and pork quality in finisher pigs

Bone characteristics of pigs fed different sources of phosphorus

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The effect of phosphorus restriction during the weaner-grower phase on compensatory growth, serum osteocalcin and bone mineralization in gilts

Cited by 40 publications

References 29 publications

Multi-Functional Roles of Chitosan as a Potential Protective Agent against Obesity

Multi-Functional Roles of Chitosan as a Potential Protective Agent against Obesity

The effect of 25‐hydroxyvitamin D3 and phytase inclusion on pig performance, bone parameters and pork quality in finisher pigs

Bone characteristics of pigs fed different sources of phosphorus

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The effect of 25‐hydroxyvitamin D₃ and phytase inclusion on pig performance, bone parameters and pork quality in finisher pigs