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70 alikreukel banner

Edible, exploited, endemic alikreukel

The South African marine resources have been exploited for subsistence purposes for thousands of years, but recently with rapid population growth, and a high concentration of people moving into coastal areas, the exploitation has intensified. Many subsistence fisheries are focused on intertidal and estuarine invertebrates, with the alikreukel Turbo sarmaticus being one of these species. […]

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65 whale shark banner

The world’s largest living fish

We had an interesting visitor into the Knysna lagoon recently, a whale shark Rhincodon typus. Whale sharks are very large, slow-moving filter-feeders which have a circumpolar distribution through all tropical and warm water, between 30°N and 35°S. The distribution of whale sharks is temperature dependent, and they are rarely sighted in areas with a surface […]

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62 melon (2)

Melon – but not the kind you’re thinking of

Toothed whales (Odontocetes) are unique among mammals – they are able to echolocate underwater. Echolocation is the specialised acoustic adaptation by animals who use sound to forage for prey, navigate, and avoid predators by emitting sounds and listening to echoes as the sound waves reflect off different objects in the environment. This requires morphological and […]

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61 kelp gull

Kelp gull – king of the trash heap?

The human population is increasing rapidly, and demands urban landscape development. Contemporary urbanisation is expanding in such a way that previously natural areas are usurped for expansive growth resulting in protected and natural areas becoming islands embedded in an urban mosaic. This increases the interactions between humans and wildlife in the area. Human refuse, and […]

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