A recent study on northern resident orcas off the coast of B.C. was unexpectedly interrupted by the appearance of Pacific white-sided dolphins. Initially seen as a distraction, these dolphins were not part of the study’s focus on how orcas find food and the challenges faced by the southern resident population. However, new research published in Scientific Reports revealed that the dolphins were actually aiding the orcas in hunting Chinook salmon, contrary to the belief that they were fish-stealing nuisances.
The lead researcher, Sarah Fortune, highlighted how the dolphins and orcas were collaborating during deep dives to locate and catch salmon. The dolphins’ echolocation signals were being used by the orcas to track down the fish, leading to successful hunting expeditions. Videos captured by the researchers showed the orcas following the dolphins underwater and sharing their prey, with the dolphins feeding on the leftover scraps.
Professor Andrew Trites, a co-author of the study, noted the unique partnership between the orcas and dolphins, emphasizing the lack of aggression between the two species despite their size difference. The study, conducted over two years in the Johnstone Strait and Queen Charlotte Sound, utilized suction-cup tags on the orcas to gather underwater footage for analysis.
The research shed light on the intricate collaboration and connection between different animal species in nature, showcasing how the orcas and dolphins worked together to ensure successful fishing trips. The study’s findings provide valuable insights into the behaviors and interactions of marine mammals, highlighting the importance of studying such partnerships in the wild.
