The A30 matriline is the name given to the most commonly seen orca matriline in British Columbia. The matriline is currently made of 3 generations, with a total of 12 individuals. It is one of the 3 matrilines in A1 pod, one of the 10 pods of the A-clan. The matriline was present in over 60% of all of the encounters in the Johnstone Strait region, making it one of the best known matrilines. The group's size has increased, from 6 in the mid-1970s to 10 as of 2013 then 12 in 2017. It is most frequently seen in Johnstone Strait from late spring to early fall, often traveling with other pods of the Northern Resident Community.
Research.
This matriline has been studied extensively, particularly in order to establish vocal behavior among killer whales. One study of this matriline established that Killer Whales increase the use of family-specific calls shortly after the birth of a calf. This increased calling is believed to facilitate the learning of the family-based calls and assist in maintaining family cohesion. This matriline was also studied in an effort to understand how calls vary among pods and among matrilines within pods.
Current status.
As of 2017, the A30 matriline consists of twelve whales. In 1999 Tsitika's first grand calf arrived and that was Clio (A50)'s first offspring, Bend (A72). In 2012 Tsitika's first great-grand calf Kamux (A101) was born, while Tsitika passed away that same year at the approximate age of 65 years. Tsitika had a total of six offspring (two alive in 2017), while daughters Clio and Blinkhorn have each had four calves of their own, and their daughters Bend and Cedar have one and two calves respectively. The newest addition to the A30 matriline is Clio's fourth calf, A116(?), born in 2017. The A30s are still one of the most frequently encountered matrilines. In the summer, they are often seen in the company of other A1 subpods or with A4 or A5 Pod.
References.
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