Questions from the public
A selection of answers to your questions.
2017 / 08 / 21
Is Montréal’s and Québec City’s wastewater having an impact on whales?
The Montréal region alone produces 2/3 of the wastewater in Quebec. The province’s second most densely populated city, Québec City, also discharges its wastewater into the St. Lawrence. Most w...
2017 / 07 / 31
Are sonars used to locate whales?
From the inflatable boat to the large ferry, every whale-watching boat is equipped with a radar and a sonar. While radar is used to probe fog and detect objects on the surface, sonar is employed to ex...
2017 / 07 / 13
How can a beluga survive out of water?
The rescue operation of the beluga trapped in the Nepisiguit River, New Brunswick, raised the question: how can a marine species survive out of its environment? For the occasion, Whales Online met wit...
2017 / 06 / 30
What is the function of the callosities in right whales?
A text from Sonia Villalon The callosities in right whales are irregular patches of thickened and keratinized tissues. These tissues are habitat for three species of amphipod crustaceans specializing ...
2017 / 05 / 23
What is a “water column”?
In a number of Whales Online articles, the term “water column” is used. What does this refer to? From the shoreline, water can sometimes appear to be a uniform mass. However, water separat...
2017 / 04 / 10
Where does the Estuary end and the Gulf begin? And what would make a species better adapted to the Gulf than to the Estuary?
When we speak of the St. Lawrence, we often hear the terms “Estuary” and “Gulf”. What do they mean? Where does the Estuary end and the Gulf begin? The St. Lawrence River origin...
2017 / 04 / 04
Can a whale be identified by its behaviour?
Many researchers identify whales using photo-identification, thus by their physical appearance. But can they identify individuals based on their behaviour? Can one recognize an individuality – a per...
2017 / 03 / 10
Why is plastic sometimes found in the stomachs of whales?
How is it that 30 plastic bags find their way into the stomach of a cetacean? The issue was raised after the discovery of a Cuvier’s beaked whale stranded in Norway last January, whose digestive...
2017 / 02 / 13
Are humpback whales saving other species being hunted by killer whales?
In 2012 in Monterey Bay, California, a BBC team filmed the intervention of two humpbacks to protect a young gray whale being pursued by killer whales. The calf ends up dying, but about fifteen other h...
2017 / 02 / 03
Which cetacean is most at risk of extinction?
According to the Red List of the International Union for Conservation of Nature (IUCN), it would be the vaquita. At the present time, there are fewer than 40 individuals, all of which are extremely at...