Page 394 - Atlas Sea Birds Ver1

% of sum of most recent estimates from different decades
2010s/20s 91.93 2010s/20s 29 147 38 30 13 22 29 11 0 71 0 13 15 0 34 3283 1130 4413

2000s 5.01 2000s 12 136 4 10 16 23 23 3 0 41 0 49 10 10 3238 1028 4266

1990s 3.06 Maximum observed pairs in different decades 1990s 30 134 106 10 29 27 13 10 26 22 0 57 20 0 31 6662 1508 8170

1980s 0.00 1980s 69 108 70 32 14 35 0 56 0 7525 1098 8623

1970s 0.00 1970s 41 73 0 90 79 28 15 113 27 38 13 27 7378 1282 8660

% of sum of most recent estimates; ≥ 1% grey 1.22 2.38 1.71 1.16 0.61 0.67 0.86 0.31 0.00 1.34 0.31 0.00 0.00 0.55 0.00 1.10 74.33 25.67 100.00
IBA on basis of ≥ 10 pairs; also sites with ≥ 1% of species' population

Year of most recent estimate 2020 2022 2020 2020 2020 2021 2020 2020 2019 2022 2022 2019 2022 2022 2021 2019

Most recent estimate (pairs); IBAs shaded grey 20 39 28 19 10 11 14 5 0 22 5 0 0 9 0 18 1216 420 1636

% of sum of 2020- 2022 1.15 3.10 1.61 1.09 0.57 1.21 0.80 0.29 4.08 0.29 0.11 0.57 0.00 67.85 32.15 100.00

This study 2020- 2022 20 54 28 19 10 21 14 5 71 5 2 10 0 1182 560 1742

2017- 2011- 2019 2013 20 29 54 147 28 38 19 30 10 13 21 22 14 26 5 11 0 0 71 46 0 0 2 13 10 15 0 0 18 13 3113 569 846 3682

Crawford
et al.
(2015)
Maximum breeding pairs observed
2010/20s AEWA (2015) 147 46 13 229 2855 795 3650

2000s Kemper et al. (2007) 136 18 2535 302 2837

1990s Crawford et al. (1999) 1995- 1997 30 106 109 0 29 27 13 9 26 7 0 57 16 0 31 3735 1153 4888

1980s Craw- ford et al. (1999) 1978- 1980 41 73 70 32 81 79 19 15 35 0 113 27 38 27 7166 1506 8672

1970s Cooper (1981) 1977- 1981 69 73 70 32 90 67 28 14 35 0 113 56 38 13 13 7425 1597 9022

Decade of most recent estimate Vöelsteen, Big Bay Robben Island Clifton rocks Bakoven rocks Duikerklip Steenbras Rock, Partridge Seal Island, False Bay Cape Hangklip rocks Sea Farm, Maasbaai Rock Stony Point, Betty's Bay Preekstoel Seal Rock, Franskraal Dyer Island Geyser Island Voeleiland, Buffeljags Quoin Rock Other South Afican sites Total Namibia Total South Africa Total overall

Point
Site

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