Stable Isotope

SAMPLA is collaborating with Marine and Coastal Management Scientist Keshnee Pillay to use stable isotopes to understand the transfer of energy through marine ecosystems, and to determine the diets and trophic positioning of marine top predators, such at the white shark. Stable Isotopes are non-radioactive chemical isotopes such as oxygen, carbon and nitrogen, they are extremely useful in studies aiming to document the flow of energy through ecosystems. The studies goal is develop a model that will conduct simulations that include the top predators of South Africa’s south coast ecosystem. With SAMPLA collecting isotope samples, from various white sharks, and repeat sampling selected individuals, this study will reveal many of the food chains unknown feeding dynamics.

  • © Enrico Gannari - The power strength of a great white shark bite
  • © Enrico Gennari - Cape fur seals need to enter water to thermo-regulate on hot days. By grouping (rafting) in the shallows they are protected from patrolling white sharks.