This cetacean observation and study expedition is of both naturalistic and scientific interest. We sail in the Norweigan Sea, north of Tromso to around Skervoy, north of the Arctic Circle.
This region is known for its winter productivity, which then feeds the entire food chain, including killer whales and humpback whales, as well as other marine predators.
Herring, the favourite prey of killer whales, shows a clear tendency to migrate further north due to climate change. The predators follow the prey and therefore also migrate further north.
Prospecting the area by sail allows privileged observations and data collection, and also, the most respectful and eco-responsible attitude. Each participant can thus raise their sensitivity to marine ecology and be involved in data collection while learning eco-responsible sailing.
During sailing, a line transect protocol is implemented. 3 observers, previously trained by the guide, observe the sea in order to detect the presence of animals. These transects respect specific conditions (wind force, sea state, boat speed, observer’s attendance) to obtain a first set of animal presence/absence data.
During the observations, a specific observation sheet is completed by the participants and the guide to obtain standardised data.
Data collection focuses on species identification, individuals count, presence of calf and behaviour, but also photo-identification (to be able to identify each animal individually).
Acoustic recordings are made with a hydrophone when marine mammals are present.
Water samples can be taken to observe ichthyoplankton.
All these data and samples are then sent to specialists.
All photos © SeilNorge - SailNorway
