During the morning of Wednesday, November 26, three juvenile sea lions of the species Arctocephalus australis were reintroduced at Playa Norte in San Clemente del Tuyú. This occurred after completing various recovery processes at the Rescue Center of the Fundación Mundo Marino.
The animals had been found in Pinamar, La Lucila del Mar, and Las Toninas between the end of October and the beginning of November, with conditions of general weakness that compromised their health.
A critical stage in the life of juveniles
The three specimens were juveniles, likely on their first trips offshore in search of food, a critical stage where they have not yet fully developed their hunting skills.
“In juvenile animals, malnutrition and dehydration often appear together because all their hydration comes from food. When they go several days without capturing prey, their metabolic balance is disrupted, body temperature decreases, and their general health is compromised,” explained Sergio Rodrigues Heredia, biologist and head of the Rescue Center.
Factors that hinder survival
Studies on the South American sea lion show that the search for food depends on factors such as the distance traveled offshore and sea conditions. In young animals, these variables can hinder fishing and cause weakness, malnutrition, and dehydration, common reasons for admission to the rescue center.
Additionally, reviews on the presence of this species on the Argentine coast indicate that sea lions —especially juvenile and subadult males— often use beaches and rocky areas to rest outside the breeding season. Therefore, it is common to find them in tourist resorts of the Partido de La Costa, where it is crucial for people to maintain a prudent distance to avoid interrupting their natural behavior.
Rescue stories
- Pinamar (October 30): admitted with general weakness, compatible with several days without feeding.
- La Lucila del Mar (October 31): presented a more advanced case of malnutrition and dehydration, with loss of body mass and slow response to stimuli.
- Las Toninas (November 3): was rescued due to anthropic pressure, meaning the constant interaction of people and dogs forced it to move and deprived it of rest.
In this last case, technicians from the Foundation and volunteers monitored it for several days, but repeated unwanted interaction forced its admission to the center for evaluation and recovery.
The importance of maintaining distance
“Many times, sea lions rest on the beach because they need to. It is part of their natural behavior. When people get too close, the animal interrupts its rest, becomes stressed, and is forced to move, which involves an energy expenditure that, in weakened juveniles, can worsen their condition. The safest way to act is to maintain distance and allow the animal to rest,” explained Rodrigues Heredia.
Recovery at the Rescue Center
During their stay at the center, the three specimens received:
- Assisted hydration.
- Thermal stabilization.
- Deworming.
- Nutritional support.
- Daily clinical monitoring.
As they regained weight, temperature, mobility, and appropriate response to stimuli, they received veterinary medical discharge and were reintegrated into their natural habitat.
The reintroduction of these three juvenile sea lions in San Clemente del Tuyú reflects the ongoing work of the Fundación Mundo Marino and the importance of environmental education for responsible coexistence with wildlife.
Each rescue is a reminder that human interaction can severely affect marine animals and that maintaining distance is key to their well-being. The recovery of these specimens symbolizes a collective effort to preserve the biodiversity of the Argentine coast.
