Polish business news service Puls Biznesu has noted a substantial reduction in pig numbers in Poland. The current inventory of about 15.7 million pigs is the lowest for 25 years, it says. Numbers in 2008 have been hit by a sharp rise in production costs due to higher feed prices. It is now estimated that, compared with the situation in January, the average production cost will have risen by more than 30 percent by the end of the year. Pork has been imported to maintain supplies locally. Total imports this year could reach 140,000 tonnes.