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A1 Pod
A1 pod is the name given to one of the best known killer whale families in British Columbia. It currently consists of 3 matrilines and 20 members and is the most commonly encountered pod in the Northern resident killer whale community. This community is found in coastal waters ranging from mid-Vancouver Island up through the Queen Charlotte Islands, although A1 pod has yet to be seen this far north. The community is made up of three clans known as A, G and R clans, each possessing a distinctive dialect and consisting of several related pods. A1 pod belongs to the biggest clan, A clan.
==Early research and naming==
A1 pod was the first pod identified by Michael Bigg and Graeme Ellis in 1972. Bigg’s pioneering photo-identification system actually originates from the regular encounter of a female whale with a distinctively torn dorsal fin.〔()
An online catalogue of the orcas of the northern resident community of the Pacific Northwest.〕 The whale, named Stubbs, was re-sighted in 1973, which gave Bigg the idea of photographing the dorsal fin of each killer whale he and Ellis encountered.〔() Wild Killer Whale Adoption Program.〕 Thus, Stubbs was aptly given the alphanumeric code A1, which also became the name of her pod. Another female orca belonging to Stubbs’s pod also had a very recognizable dorsal fin with a big nick on the lower edge and was named A2, but became better known as Nicola. During the summer of 1973, A1 pod spent a considerable amount of time with A4 and A5 pod, which led researchers to believe they belonged to the same group. When it became clear to researchers that these whales spent a significant amount of time apart from A1 pod and had just happened to be travelling together when first identified, they were named A4 pod and A5 pod. Moreover, researchers discovered that A1 pod generally split during winter months into three subpods or matrilines: A1 subpod, A12 subpod and A2 subpod.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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