Supplement 1. All data used to fit modifications to source and sink population survival rates.

File List survey_data.txt<br> post_spill_carc_data.txt<br> live_data_kni.txt<br> live_data_mon.txt Description The survey_data.txt file is a tab-delimited file. It contains sea otter population abundance estimates derived from aerial survey data for western Prince William Sound, Alaska and the northern Knight Island subarea of Prince William Sound from 1993–009. Column definitions Survey year Western Prince William Sound sea otter abundance estimate (N) Western Prince William Sound variance Northern Knight Island sea otter abundance estimate (N) Northern Knight Island variance Missing values are represented as “-9” Checksum values are: Column 2 (WPWS N): SUM = 39113; 5 missing values<br> Column 3 (WPWS var): SUM = 2796491; 5 missing values<br> Column 4 (northern KNI N): SUM = 985; 6 missing values<br> Column 5 (northern KNI var): SUM = 4214; 6 missing values The post_spill_carc_data.txt file is a tab-delimited file. It contains annual age-at-death distributions derived from carcasses collected in oiled areas of western Prince William Sound, Alaska from 1990–2009. Column definitions Age 1990 distribution 1991 distribution 1992 distribution 1993 distribution 1994 distribution 1995 distribution 1996 distribution 1997 distribution 1998 distribution 1999 distribution 2000 distribution 2001 distribution 2002 distribution 2003 distribution 2004 distribution 2005 distribution 2006 distribution 2007 distribution 2008 distribution 2009 distribution Missing values are represented as “-9” Checksum values are: Column 2 (1990 distribution): SUM = 59; 0 missing values<br> Column 3 (1991 distribution): SUM = 14; 0 missing values<br> Column 4 (1992 distribution): SUM = 23; 0 missing values<br> Column 5 (1993 distribution): SUM = 23; 0 missing values<br> Column 6 (1994 distribution): SUM = 21; 0 missing values<br> Column 7 (1995 distribution): SUM = 10; 0 missing values<br> Column 8 (1996 distribution): SUM = 22; 0 missing values<br> Column 9 (1997 distribution): SUM = 22; 0 missing values<br> Column 10 (1998 distribution): SUM = 51; 0 missing values<br> Column 11 (1999 distribution): SUM = 29; 0 missing values<br> Column 12 (2000 distribution): SUM = 54; 0 missing values<br> Column 13 (2001 distribution): SUM = 32; 0 missing values<br> Column 14 (2002 distribution): SUM = 16; 0 missing values<br> Column 15 (2003 distribution): SUM = 37; 0 missing values<br> Column 16 (2004 distribution): SUM = 26; 0 missing values<br> Column 17 (2005 distribution): SUM = 25; 0 missing values<br> Column 18 (2006 distribution): SUM = 16; 0 missing values<br> Column 19 (2007 distribution): SUM = 18; 0 missing values<br> Column 20 (2008 distribution): SUM = 32; 0 missing values<br> Column 21 (2009 distribution): SUM = 0; 21 missing values The live_data_kni.txt file is a tab-delimited file. It contains live female age distributions from the northern Knight Island area (i.e. oiled area) of western Prince William Sound, Alaska from 1996–2009. Column definitions Age 1990 distribution 1991 distribution 1992 distribution 1993 distribution 1994 distribution 1995 distribution 1996 distribution 1997 distribution 1998 distribution 999 distribution 2000 distribution 2001 distribution 2002 distribution 2003 distribution 2004 distribution 2005 distribution 2006 distribution 2007 distribution 2008 distribution 2009 distribution Missing values are represented as “-9” Checksum values are: Column 2 (1990 distribution): SUM = 0; 21 missing values<br> Column 3 (1991 distribution): SUM = 0; 21 missing values<br> Column 4 (1992 distribution): SUM = 0; 21 missing values<br> Column 5 (1993 distribution): SUM = 0; 21 missing values<br> Column 6 (1994 distribution): SUM = 0; 21 missing values<br> Column 7 (1995 distribution): SUM = 0; 21 missing values<br> Column 8 (1996 distribution): SUM = 52; 0 missing values<br> Column 9 (1997 distribution): SUM = 55; 0 missing values<br> Column 10 (1998 distribution): SUM = 46; 0 missing values<br> Column 11 (1999 distribution): SUM = 37; 0 missing values<br> Column 12 (2000 distribution): SUM = 37; 0 missing values<br> Column 13 (2001 distribution): SUM = 32; 0 missing values<br> Column 14 (2002 distribution): SUM = 44; 0 missing values<br> Column 15 (2003 distribution): SUM = 43; 0 missing values<br> Column 16 (2004 distribution): SUM = 40; 0 missing values<br> Column 17 (2005 distribution): SUM = 25; 0 missing values<br> Column 18 (2006 distribution): SUM = 16; 0 missing values<br> Column 19 (2007 distribution): SUM = 0; 21 missing values<br> Column 20 (2008 distribution): SUM = 32; 0 missing values<br> Column 21 (2009 distribution): SUM = 0; 21 missing values The live_data_mon.txt file is a tab-delimited file. It contains live female age distributions from the Montague Island area (i.e. unoiled area) of western Prince William Sound, Alaska from 1996–2009. Column definitions Age 1990 distribution 1991 distribution 1992 distribution 1993 distribution 1994 distribution 1995 distribution 1996 distribution 1997 distribution 1998 distribution 1999 distribution 2000 distribution 2001 distribution 2002 distribution 2003 distribution 2004 distribution 2005 distribution 2006 distribution 2007 distribution 2008 distribution 2009 distribution Missing values are represented as “-9” Checksum values are: Column 2 (1990 distribution): SUM = 0; 21 missing values<br> Column 3 (1991 distribution): SUM = 0; 21 missing values<br> Column 4 (1992 distribution): SUM = 0; 21 missing values<br> Column 5 (1993 distribution): SUM = 0; 21 missing values<br> Column 6 (1994 distribution): SUM = 0; 21 missing values<br> Column 7 (1995 distribution): SUM = 0; 21 missing values<br> Column 8 (1996 distribution): SUM = 26; 0 missing values<br> Column 9 (1997 distribution): SUM = 23; 0 missing values<br> Column 10 (1998 distribution): SUM = 34; 0 missing values<br> Column 11 (1999 distribution): SUM = 0; 21 missing values<br> Column 12 (2000 distribution): SUM = 0; 21 missing values<br> Column 13 (2001 distribution): SUM = 13; 0 missing values<br> Column 14 (2002 distribution): SUM = 9; 0 missing values<br> Column 15 (2003 distribution): SUM = 0; 21 missing values<br> Column 16 (2004 distribution): SUM = 15; 0 missing values<br> Column 17 (2005 distribution): SUM = 12; 0 missing values<br> Column 18 (2006 distribution): SUM = 8; 0 missing values<br> Column 19 (2007 distribution): SUM = 10; 0 missing values<br> Column 20 (2008 distribution): SUM = 24; 0 missing values<br> Column 21 (2009 distribution): SUM = 0; 21 missing values