Possible causes of a substantial decline in sightings in South Africa of an ecologically important apex predator, the white shark

A decline in sightings of a top predator, the white shark (Carcharadon carcharias), in South Africa was quantified in order to identify possible causes for this decline. White shark sightings data across 8 years (2011-2018), recorded from a cage-diving vessel in Gansbaai are repor ted. A significant...

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Bibliographic Details
Published in:South African Journal of Science 2021-01, Vol.117 (1-2), p.123-126
Main Author: Fisher, Robin
Format: Article
Language:English
Subjects:
Animal behavior
Bycatch
Carcharadon carcharias
Carcharhinus brachyurus
Carcharodon carcharias
Commercial fishing
Conservation
Ecology
Ecosystem assessment
Environmental changes
Fatalities
Fish populations
Fisheries
Fishing
Fishing nets
Galeorhinus galeus
Gansbaai
KwaZulu-Natal
Marine conservation
marine predators
Nets
Notorynchus cepedianus
Overfishing
Population
Population decline
Predation
Predators
Prey
Reduction
Sharks
Variance analysis
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Summary:A decline in sightings of a top predator, the white shark (Carcharadon carcharias), in South Africa was quantified in order to identify possible causes for this decline. White shark sightings data across 8 years (2011-2018), recorded from a cage-diving vessel in Gansbaai are repor ted. A significant decline in mean total white shark sightings per boat trip (>6 in 2011 to
ISSN:0038-2353
1996-7489
DOI:10.17159/sajs.2021/8101