Krill, are small crustaceans that play a significant role in the frigid Antarctic marine ecosystems where they thrive due to rich, nutrient waters. They serve as the foundation of the Antarctic food chain and are the primary food source for various marine life, like whales, seals, and seabirds. But over the past two decades, the human demand for krill has more than doubled because of the booming – and highly lucrative — aquaculture and health supplement industries, supplying western consumers.
The krill ecosystem in the Antarctic is a delicate and intricate web of life, where numerous species rely on these small, shrimp-like crustaceans for their survival. At the very foundation of this complex system, Antarctic krill, play a pivotal role as a keystone species.
These tiny animals form massive swarms that drift through the frigid Southern Ocean, providing sustenance for an array of marine life. From filter-feeding baleen whales, including humpbacks, blues, and minkes, to agile penguins such as Adélie and chinstrap, and a diverse array of seabirds, including albatrosses and petrels, krill serves as the primary source of nutrition. Additionally, a multitude of fish species, seals, and even some invertebrates like squid and salps, directly or indirectly depend on krill for their dietary needs.
Thus, the krill ecosystem not only highlights the interdependence of Antarctic species but also underscores the critical importance of preserving this fragile balance for the health and sustainability of the entire Antarctic food web.
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Antarctica's krill fishery closed early for the second year running. That is a symptom of a concentrated fleet, not a sign of abundance.
