0187-5779 0187-5779 S0187-57792011000400369 Mexico Mexico 00 12 2011 00 12 2011 29 4 369 377

1995 1979 234-50 1979 43 261-4 1965 73 112-24 1998 29-40 1984 55-67 2009 60 770-84 1985 2004 133-44 1997 17 239-54 1994 3-21 1995 FAO (Food and Agriculture Organization of the United Nations) 1998 IWRA 2008 Montpellier, France 138-47 2004 19 15-23 2004 22 297-87 2007 1993 13 155-64 1997 42 115-26 1970 1997 61 4-10 2004 79 175-84 1991 2 175-203 1998 129-44 2009 104 156-63 ISTRO 2009 Izmir, Turkey 1-9 2000 2004 6 902-12 2007 170 363-72 2009 103 364-72 1977 28 498-508 2008 100 72-7 2009 16 323-38 1999 63 1039-54 1999 49 337-45 2004 19-24 2002 1 14-37