Mixed news on the young captive orcas who were released back into the wild in Russia – while a second released orca appears to be traveling with wild killer whales, the group of four seems to have disbanded somewhat. Two of the released belugas are in an area with wild whales.
On the plus side, scientists of the All-Russian Research Institute of Fisheries and Oceanography (VNIRO) and the Institute of Ecology and Evolution Severtsov Russian Academy of Sciences (IPEE RAS) have determined that a second released captive orca is now traveling with wild whales. From VNIRO:
During monitoring conducted on catamarans in the Shantar Islands, scientists observed a family of wild killer whales off the coast of the South Shantar archipelago. The group had at least 14 killer whales, which they managed to photograph. After a careful analysis of the photographs and their comparison with the photograph and description of animals from Srednyaya Bay, it was noted that one of the killer whales in the group has characteristic scars of the selected mark. Individual signs made it possible to identify this killer whale as Zina, released in the second installment on August 6. The animal got rid of the [satellite tag] that it was set upon release.
“Some killer whales from the wild family in which Zina was met were previously identified, included in photo catalogs and there is biological information on them,” said Vyacheslav Bizikov, deputy director for research at VNIRO. “They are classified as a carnivorous ecotype.”
The first orca who was accepted by a group of wild whales, a young female named Vasilievna, was documented hunting and sharing food with them on August 20th.
With only tracking data, it’s difficult to assess the situation of the group of four (Alexandra, Tikhon, Zoya, and Gayka) who reportedly stayed together for 10 days. The young male, Tikhon, has traveled south either alone or in the company of wild whales. The three females remain in the same general area either together, or within an easy day’s travel distance (approximately 50 miles (80 km) from each other).
Alexandra’s path (green dot with the number 3) coincides with another orca’s track so they may have traveled together at the last location on September 7th.
Because visual documentation hasn’t been reported, all we know for certain is that they are near each other in the same area as wild orcas and appear to be thriving. But that alone is good news!
According to the latest data from satellite tags, killer whales from the third issue of Zoya, Tikhon and Gadget, as well as the younger female Alexander from the second issue, who joined them, moved together for about 10 days. Then the group broke up and now three females Zoya, Gadget and Alexander are located near the island of Feklistov of the Shantar archipelago, the male Tikhon went to the Tugursky Bay.
Killer whales Kharya and Forest, having traveled from Cape Perovsky past Sakhalin Island to the open sea, returned to Sakhalin Gulf.
Little has been reported on the 12 belugas who were released, but tracking data shows that at least two of them are in the same area as Tikhon:
Two belugas from the fourth issue with [tags] are also located in the Sakhalin Gulf. In this area, scientists and fishermen noted the appearance of wild killer whales and beluga whales. (Press – Service VNIRO).