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Browsing by Author "Jewell, Oliver J D"

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Effects of smart position only (SPOT) tag deployment on white sharks Carcharodon carcharias in South Africa

Author: Jewell, Oliver J D ; Wcisel, Michelle A ; Gennari, Enrico ; Towner, Alison V ; Bester, Marthán N ; Johnson, Ryan L ; Singh, Sarika Date: 2011 We present 15 individual cases of sub-adult white sharks that were SPOT tagged in South Africa from 2003-2004 and have been re-sighted as recently as 2011. Our observations suggest SPOT tags can cause permanent cosmetic and structural damage ... Read more c b
Environmental influences on the abundance and sexual composition of white sharks Carcharodon carcharias in Gansbaai, South Africa

Author: Towner, Alison V ; Underhill, Les G ; Jewell, Oliver J D ; Smale, Malcolm J Date: 2013 The seasonal occurrence of white sharks visiting Gansbaai, South Africa was investigated from 2007 to 2011 using sightings from white shark cage diving boats. Generalized linear models were used to investigate the number of great white sharks ... Read more c b
Gauging the threat: the first population estimate for white sharks in South Africa using photo identification and automated software

Author: Towner, Alison V ; Wcisel, Michelle A ; Reisinger, Ryan R ; Edwards, David ; Jewell, Oliver J D Date: 2013 South Africa is reputed to host the world’s largest remaining population of white sharks, yet no studies have accurately determined a population estimate based on mark-recapture of live individuals. We used dorsal fin photographs (fin IDs) ... Read more c b

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Browsing by Author "Jewell, Oliver J D"

Browsing by Author "Jewell, Oliver J D"

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