8[8]Brads haw R H,et al.Behavioural and hormonal responses of pigs during transport:effect of mixing and duration of joumey[J].Animal science,1996,62:547-554.
9[9]Sybesma W,Koolmeesang PA,Vander D G.Meatpast and present:research,production,consumption,TNO Voeding,Zeist[J].Netherlands,1994 (2):89-92.
2Hansen B A, Stallknecht D E, Swayne D E, et al. Avian influenza virus in Minnesota ducks 1998-2000[J].Avian Dis, 2003,(47):867-871.
3Slemons R D, Hansen W R, Converse K A, et al. Type A influenza virus surveillance in free-flying, non-migratory ducks residing on Eastern Shore Maryland[J].Avian Dis, 2003, (47):1107-1110,
4Chenga M C, Wang C H, Kida H, et al. Influenza A virological surveillance in feral waterfowl in Taiwan from 1998 to 2002[C].International Congress Series 1263 (2004)745-748.
5De Marco M A, Foni G E, Campitelli L, et al. Circulation of Influenza Viruses in Wild Waterfowl Wintering in Italy During the 1993-99 Period: Evidence of Virus Shedding and Seroconversion in Wild Ducks[J],Avian Dis, 2003, (47):861-866.
6Fouchier R A M, Olsen B, Bestebroer T M, et al, Influenza A Virus Surveillance in Wild Birds in Northern Europe in 1999 and 2000[3].Avian Dis, 2003,(47):857-860,
7Lvova D K, Yamnikovaa S S, Gambaryanb A S, et al. Isolation of influenza viruses from wild birds in the Volga River basin and in the North Caspian Region[C].International Congress Series 1219 (2001):251-258.
8Okazaki K, Takada A, Ito T, et al. Precursor genes of future pandemic influenza viruses are perpetuated in ducks nesting in Siberia[J].Arch. Virol, 2000,(145):885-893.
9Kida H, Okazaki K, Takada A, et al. Global surveillance of animal influenza for the control future pandemics[C],International Congress Series 1219(2001):169-171.
10Alexander D J. Report on avian influenza in the eastern hemisphere during 1997-2002[J].Avian Dis, 2003,(47):792-797.
9Bradshaw RH. , et al. Behavioural and hormonal responses of pigs during transport: effect of mixing and duration of joumey [J]. Animal science,1996, 62:547-554.
10Sybesma W. , Koolmeesang PA. , Vander DG.. Meat past and present:research , production , consumption , TNO Voeding , Zeist[J]. Netherlands, 1994, (2) :89-92.
