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ReShark Initiative: A Global Effort to Restore and Protect Endangered Sharks and Stingrays

Sharks are one of the most important and fascinating creatures of our oceans, and they play a critical role in maintaining the delicate balance of marine ecosystems. However, over the years, human activities such as overfishing, habitat destruction, and climate change have led to a dramatic decline in shark populations worldwide. 

As a result, many shark species are now threatened or endangered, and urgent action is needed to protect and restore their populations.

Fortunately, a new international effort to rebuild shark populations has officially begun, led by a newly formed organization called ReShark. This initiative has brought together 15 countries and 44 aquariums from around the world to raise zebra sharks in captivity and release them back into the wild.

The first step in this massive re-wilding project was taken earlier this year when two baby zebra sharks were released in the Raja Ampat Regency of Indonesia. 

The objective of ReShark is to reintroduce zebra sharks into Indonesian waters and revive the declining population of threatened and endangered sharks and stingrays worldwide. Their target is to release 500 zebra sharks in the next 5 to 10 years.

According to Dr. Erin Meyer, Seattle Aquarium vice president of conservation programs and partnerships, this is just the beginning of creating a shark resurgence. “We’re just getting started in re-wilding the oceans, so we can ensure that we have a resilient, healthy, global ocean for today and for future generations,” she said.

This international collective, which today has 70 partners, is committed to restoring the populations of threatened and endangered sharks and stingrays worldwide. Meyer states that according to the IUCN Red List of Threatened Species, nearly 400 types of sharks and stingrays across the globe are considered endangered.

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Marine Ecosystem Collapse

This initiative aims to address this alarming situation and protect these magnificent creatures for future generations.

The decline in shark populations has had a significant impact on marine ecosystems, leading to a decline in biodiversity and a disruption in the food chain. Sharks are apex predators, and their loss can have a cascading effect on the entire ecosystem. Therefore, the restoration of shark populations is critical for the health and sustainability of our oceans.

According to Dr. Erin Meyer, Seattle Aquarium vice president of conservation programs and partnerships, the main cause of this decline is overfishing. 

“We hear a lot about [people engaging in] shark fishing for their fins, but they’re also fished for their meat,” she said of sharks. “And that meat is eaten all around the world.” This has led to a significant decline in shark populations, with many species now threatened or endangered.

According to Meyer, sharks are “keystone species” in their ecosystems, which implies that their role is crucial in maintaining the balance of other species within their habitat, and the absence of sharks could lead to the collapse of the ecosystem. This has led to a cascade of negative effects throughout the ecosystem, which can be difficult to reverse once they have begun.

To address this alarming situation, a new organization called ReShark has launched an initiative to restore threatened and endangered sharks as well as stingrays around the world. The initiative of ReShark began in 2020 with a focus on the conservation of the endangered zebra shark.

Meyer mentioned that zebra sharks are on the verge of extinction in certain regions of the world like Indonesia. In Raja Ampat, National Geographic reported that only three zebra sharks were found by researchers in 15,000 hours of search between 2001 and 2021.

ReShark Efforts

“They also are a species that aquariums have been learning [about] and researching [while] in our care, for decades,” Meyer said, elaborating why the species was at the topmost of ReShark’s priority list. By raising zebra sharks in captivity and releasing them back into the wild, ReShark aims to restore their populations and prevent the collapse of marine ecosystems.

An international effort to rebuild shark populations has officially begun, as 15 countries and 44 aquariums have joined forces to raise zebra sharks in captivity and release them back into the wild. 

The new organization, called ReShark, aims to release 500 zebra sharks in Indonesian waters within the next five to 10 years. The initiative, which began in 2020, marks the first time that international bodies have united to recover an endangered marine species while also breeding them in human care.

The main cause of the decline of shark populations is overfishing, said Dr. Erin Meyer, Seattle Aquarium vice president of conservation programs and partnerships. Sharks are “keystone species” in their ecosystems, which implies that their role is crucial in maintaining the balance of other species within their habitat, and the absence of sharks could lead to the collapse of the ecosystem.

In parts of the world like Indonesia, zebra sharks are “nearly extinct,” with researchers only able to count three zebra sharks in 15,000 hours of searching between 2001 and 2021.

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Breeding and Releasing

ReShark’s breeding and releasing activities rely on information gathered from aquariums globally and academic partners, including Dr. Christine Dudgeon from the University of the Sunshine Coast in Australia.

Meyer stated that the organization was “confident” that their efforts would be successful. The organization had to build purpose-built nurseries in Indonesia to transport eggs, rear them, and eventually release them into marine-protected areas where they would grow and later reproduce on their own in the wild.

ReShark’s first two baby zebra sharks, named Charlie and Kathlyn, were released in January 2023 into an off-limits shark fishing lagoon in Raja Ampat. The event was emotional, said Meyer, who was in attendance, as the sharks are going to be the ambassadors for the future of the project. 

She continued, “And they’re proof of concept that this incredible idea to bring together partners from around the world to bring sharks back, to restore sharks, is possible.” ReShark aims to restore threatened and endangered sharks as well as stingrays around the world and to create a shark resurgence for a resilient, healthy, global ocean for now and for tomorrow.

Photo: Walls Desk

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