Introduction to Orcinus orca - Southern Resident Killer Whales

These flashcards cover key vocabulary and concepts related to the Southern Resident Killer Whales, their ecology, social structure, and the threats they face.

Orcinus orca

The scientific name for killer whales, commonly known as orcas.

Southern Resident Killer Whales

A population of orcas in British Columbia consisting of about 74 individuals, specializing in fish-eating.

Transient / Bigg’s Killer Whales

A type of killer whale that preys primarily on marine mammals, with a population of 349+ individuals.

Acoustics

The study of sound, particularly in relation to how killer whales communicate.

Social Philopatry

A tendency for members of killer whale pods to remain in their natal environments and with their family groups.

Matrilineal

Referring to a social structure where lineage and inheritance are traced through the maternal line.

AIS (Automatic Identification System)

A system used to track the location and movement of vessels to prevent collisions.

Kin-directed food sharing

Behavior observed in some killer whale populations where individuals share food with family members to support survival.

Inclusive fitness

An evolutionary strategy that favors altruistic behaviors that benefit relatives.

Threats to Southern Resident Killer Whales

Vessel disturbances, noise pollution, and limited prey availability are significant threats to their survival.