Decoding the secret lives of killer whales one micro-second at a time
Using methods to detect when the animals are catching prey and to model their energy expenditure will be key to understanding the differences between these neighbouring whale populations.
Grey Whale Watching in Baja California Sur, Mexico
It’s that time of year again, when people and grey whales head to the lagoons of Baja California Sur for the annual winter event.
Long-term studies quantify the prey requirements of pinnipeds, and help predict the effects of nutritional stress
Two new studies by Dr. David Rosen answer the question: “How much fish does a seal need?”
How big is that whale?
New data from stranded whales is yielding better estimates of body sizes needed to determine drug dosages, as well as assess the health and food requirements of whales
You can’t beat a healthy heart
New research is shedding light on the hearts of healthy marine mammals, and how they compare to human hearts
No apparent shortage of prey for southern resident killer whales in Canadian waters during summer
Researchers reported that Chinook salmon in the Salish Sea in summertime are four to six times more abundant for southern resident killer whales than northern resident killer whales.
What do differences in animal behaviour reveal about the decline of Steller sea lions in Alaska?
More than 50 years of studying Steller sea lion behaviour has yielded one of the most complete life history descriptions for any species of marine mammal.
Guadalupe fur seals continue to recover as new colony discovered
New colony of Guadalupe fur seals discovered on El Farallón de San Ignacio Island, Gulf of California
The Killers of California and Oregon
Thirteen years of photo-identification data of killer whales observed in California and Oregon provide new insights into the distribution and population structure of mammal-eating killer whales in the eastern North Pacific Ocean.
Blue herons identified as a significant juvenile salmon predator
Looking for predators that ate salmon, an Indigenous biologist suggested looking at heron. Discarded tags proved Pacific great blue herons could be scooping up as many as 3-6% of all juvenile salmon.