[Article déjà publié le 21 avril 2024]
Great white sharks, true giants of the seas, arouse admiration and fear throughout the world. These majestic predators, known for their impressive size, dominate the marine territories they inhabit. Not only do they dominate the oceans, but they also carry out extremely long and rapid migrations. These incredible journeys allow them to meet their vital needs and ensure the survival of their species.
Nicole's case: female white shark with a fascinating journey
In November 2003, Nicole, a female white shark named for actress Nicole Kidman, received a tracking device from the Wildlife Conservation Society. Attached to its dorsal fin, this device collects valuable information on its speed and movements without stressing the animal. Nicole completed a remarkable transoceanic migration, traveling 11,100 kilometers from South Africa to Australia in 99 days.
Nicole's surprise reappearance in South Africa in August 2004 astonished researchers and called into question previously accepted migratory patterns of great white sharks. This incident suggested a greater interconnectedness between shark populations, spread across various regions.
It also highlighted the need to adopt comprehensive and effective conservation policies. These measures are essential to protect these sharks, which are particularly vulnerable to fishing on the high seas.
The journey of the white shark: survival strategies and migration
Although great white sharks are impressive migrators, they are not alone in this category. For example, the Arctic tern travels up to 96,000 kilometers annually between Europe and Antarctica, demonstrating the incredible adaptability of various species in the face of extreme conditions.
The journey of this great white shark, Nicole, serves as a valuable model for studying their migratory behavior and survival strategies. This research opens avenues for understanding how these sharks use ocean currents and Earth's magnetic fields to orient themselves. It also helps assess the impact of climate change and human activities on their migration patterns.
The migration of great white sharks also profoundly affects marine ecosystems. As predators at the top of the food chain, these sharks keep marine populations in balance. They regulate populations of seals and sea lions, contributing to the health of habitats like kelp forests, crucial for several marine species. The migratory routes of sharks and their seasonal presence therefore influence the biodiversity and productivity of the oceans.
The challenges of cross-border conservation
The transoceanic migrations of great white sharks present major challenges for their conservation. It is essential to collaborate internationally. Creating protected maritime corridors along migratory routes can reduce the risks of accidental capture and other human dangers.
International agreements, such as those of the Convention on the Conservation of Migratory Species (CMS) and the Convention on International Trade in Endangered Species (CITES), are crucial. To succeed in these initiatives, it is crucial to understand the migratory habits of sharks. Furthermore, political will and adequate resources are required to implement them properly.
Via: iflscience
With an unwavering passion for local news, Christopher leads our editorial team with integrity and dedication. With over 20 years’ experience, he is the backbone of Wouldsayso, ensuring that we stay true to our mission to inform.
