Documentations

Effects of body composition of gilts before first farrowing on their longevity

Body condition (body weight, backfat depth) was recorded on 829 gilts from 15 French herds when entering the herd (110 kg body weight), after quarantine phase and during first lactation.…

Modelling of growth and feed consumption of pigs from birth to slaughter : updating of the coefficients used to standardise the performance criteria in technical-economic management

Reference data make farmers aware of the performance level of their own farms, and help them analyse their results and improve productivity. Management practices vary greatly between farms therefore, in…

Effect of birth weight on the feed conversion ratio of growing-finishing pigs

Influence of birth weight on feed conversion ratio (FCR) was evaluated from three batches, representing 41 crossbred (LWxPP)x(LWxLd) litters, complete or not. Over the post-weaning and fattening periods, mixing of…

The effect of a reduction in animal housing density during the growing-fattening period on air quality and growth performance

Two trials were performed using 168 growing-fattening pigs in order to determine the effect of air renewal rate and housing density on growth performance and health status. Two air renewal…

How do ground fixed or suspended objects influence the activity of growing-finishing pigs housed on fully slatted floor?

The objective of the present study was to improve the well being of pigs by decreasing their aggressiveness during the growing-fattening period by stimulating explorative behaviour. Three treatments were tested:…

Pig rearing methods and the prevalence of antimicrobial resistant E. coli

Faecal samples were collected from 24 pig farms at the end of the finishing period in order to assess the numbers of Escherichia coli which were resistant to 16 antimicrobial…

Effects of feeding growing or finishing pigs with deoxynivalenol (DON) naturally contaminated feed on growth performance and immunological status

A feeding trial with 3 groups of 48 growing pigs was conducted to determine the effects of feeding a naturally deoxynivalenol contaminated diet (1600 μg/kg DON) on performance and selected…

Estimation of realised genetic trends in French Large White pigs from 1977 to 1998 for production and meat and fat quality traits using frozen semen

An experimental design has been implemented in INRA’s experimental herds in order to estimate realised genetic trends from 1977 to 1998 in the French Large White (LW) pig breed. LW…

Analysis of the diversity of some French breeds and lines of pigs using genetic markers in the framework of a wide European survey

A sample of sixteen French breeds (and lines) of pigs was investigated in the framework of an EU-funded diversity project including seventy breeds, about fifty individuals per breed having been…

Zootechnical and environmental effects of high energy feed in growing-finishing pig diets corresponding with CORPEN recommendations

Effects on animal husbandry and the environment were studied using high energy feeds. The diets corresponded or did not correspond with CORPEN recommendations (1996). A total of 288 growing-fattening pigs…

Effect of reduction of dietary protein level, associated with an adjusted electrolytic balance or not, on performance of lactating sows exposed to 23 or 26°C on average

The effect of dietary crude protein (CP) level, associated with a reduced electrolytic balance (EB) or not, was tested on 52 crossbred Large White x Landrace sows exposed to 23…

Comparison of 4 feeds given to piglets weaned at 28 days of age: do acid whey powder and extruded maize improve performance results

The inclusion of acid whey powder and extruded maize in weaning feeds was studied. A total of 347 piglets weaned at 28 days of age were used. The two feedstuffs…