Bottlenose Dolphin Welfare: Resident Communities and Boat Traffic

UK bottlenose dolphins live in resident communities with complex social structures. Their welfare is threatened by boat disturbance, pollution, and bycatch.

Key Facts

Around 200 bottlenose dolphins live in the Moray Firth population - one of the northernmost in the world
Bottlenose dolphins have complex social bonds and show signs of grief when group members die
Boat disturbance from wildlife watching vessels affects foraging, resting, and calf development
Bycatch in fishing nets is a significant mortality cause for UK cetaceans
PCB (polychlorinated biphenyl) pollution bioaccumulates in dolphin blubber and impairs immune function
Scotland's bottlenose dolphins are protected by a Special Area of Conservation in the Moray Firth

Welfare Considerations

Bottlenose dolphin welfare in the Moray Firth is compromised by cumulative boat disturbance. Individual dolphins subject to frequent vessel approaches show altered diving behaviour, reduced feeding efficiency, and elevated stress hormone indicators. Pollution accumulation impairs breeding - females with high PCB loads have lower calf survival rates. Bycatch causes immediate welfare harm in the most severe way. The welfare of this resident community is measurable through long-term health monitoring of known individuals, which the Bottlenose Dolphin Research Institute conducts in the Moray Firth.

What You Can Do

Follow WiSe scheme guidelines when watching dolphins from boats
Keep at least 100 metres from dolphins in boats and never chase or intercept them
Support the Whale and Dolphin Conservation Society (WDC) in its monitoring work
Advocate for stricter PCB cleanup and pollution controls in UK waters
Report bycatch or stranded dolphins to the British Divers Marine Life Rescue