Buzz
As of now, the Antarctic Krill confidently assures that it is not entirely consumed.
The Antarctic Krill, also known as the Antarctic Krill, is hailed as the 'world's food reservoir for the future.' With an estimated 30 trillion individuals and around 50 to 150 million tons in the oceans, despite the annual harvesting of over 300 million tons of Antarctic Krill, their numbers remain incredibly abundant, maintaining diverse biological communities in nature.
The habitat of this tiny crustacean is concentrated in open waters near the Antarctic, a marine shrimp species with a size not exceeding 6cm, weighing about 2 grams, shorter than a whiteboard marker, and with a lifespan of about 5 to 6 years. Despite this, they are distributed across oceans worldwide. There are over 80 species of Antarctic Krill, with slightly different body sizes and shapes but sharing a common trait of being extremely numerous.
Surprisingly, this tiny creature plays a crucial role in nurturing the gigantic ocean ecosystem. They are one of the largest protein sources globally.
The largest creatures on Earth such as blue whales, fin whales... consider the Antarctic Krill as their main food source. A blue whale can consume several tons of krill per day, translating to millions of krill. Besides giant whales, seals, penguins, various fish, and squid in the Antarctic waters feed on Antarctic Krill and may consume over 250 million tons annually. Additionally, humans harvest 50 million tons of Antarctic Krill each year. Consequently, nearly 300 million tons of Antarctic Krill vanish annually.
Despite being a staple for many marine creatures, the Antarctic Krill remains one of the most populous species in the ocean, primarily due to their prolific reproductive capacity.
Each female Antarctic Krill can lay anywhere from 6,000 to 10,000 eggs at a time and can produce multiple batches of eggs in a breeding season. The total number of eggs laid by an entire swarm of krill during the breeding season is astronomically large, almost incalculable. Antarctic Krill undergo a short maturation cycle, reaching maturity 24 months after birth.
In addition to their strong reproductive capabilities, Antarctic Krill's diet consists of phytoplankton in the ocean. Phytoplankton serves as the foundation of the marine food chain. Through photosynthesis, they can extract carbon from carbon dioxide. As a result, phytoplankton thrives abundantly in sunlit surface waters of the ocean, where Antarctic Krill predominantly operates.
Antarctic Krill eggs, lacking adhesive properties in seawater, float in the water column and hatch naturally based on nutrients within the eggs. The eggs drift indefinitely and gradually sink to depths of hundreds of thousands of meters in the ocean. In these deep, dark, and relatively cold waters, where organisms are scarce, krill eggs hatch and can evade many natural predators.
With relatively high survival rates and nocturnal activity, Antarctic Krill in this stage can thrive. Subsequently, they form massive swarms near the surface to feed on phytoplankton. Here, they become prey to predators (such as whales...) and the cycle continues.
Thanks to their robust reproductive capacity and ample food supply, Antarctic Krill confidently asserts that they are not entirely consumed at present.
In reality, Earth's ecosystem maintains a delicate balance, with a vast number of Antarctic Krill nurturing countless species of fish, birds, and marine mammals. Without these 'predators,' this crustacean species would proliferate uncontrollably, disrupting the balance of the marine ecosystem.
Currently, due to human fishing activities and climate change, the number of whales has greatly decreased, allowing Antarctic Krill populations to remain substantial.
Source: Sohu
