Title: Functional Data Analysis to Describe and Classify Southern Resident Killer Whale Calls
\nSpeaker: Paul Nguyen Hong Duc (Carleton University)
\nDate:\u00a0 Friday, February 3rd, 2023
\nTime:\u00a0 1:00 \u2013 2:00 p.m.
\nLocation: HP 4351 (Macphail Room)<\/p>\n
Abstract:\u00a0 <\/strong>The Southern Resident killer whale (SRKW) is an\u00a0endangered\u00a0\u00a0population of whales found in\u00a0the northeast Pacific. They have a vocal dialect unique from other killer\u00a0whales, having a repertoire\u00a0of distinct stereotyped calls. A framework for\u00a0distinguishing SRKW call types using the frequency traces of the amplitude\u00a0ridges from their spectrograms (termed frequency ridges) is proposed.\u00a0The first\u00a0step is the extraction of these frequency ridges of SRKW calls using an\u00a0Sequential Monte Carlo (SMC) approach. Next, these frequency ridges are\u00a0converted into functional data using\u00a0B-spline functions. They are analysed with\u00a0a functional principal component (FPC) analysis to characterise the intrinsic\u00a0variability of frequency ridges within a call type. The FPCs are able to\u00a0capture the general patterns in the frequency ridges of the different SRKW call\u00a0types. The FPCs are also used as the basis for call classification. This\u00a0framework proves to be successful for\u00a0classification with some call types\u00a0correctly classified almost 80\\% of the time, while other calls are less well\u00a0discriminated. On balance, this approach showed reasonable performance given\u00a0the small sample size available.<\/p>\n","protected":false},"excerpt":{"rendered":" Title: Functional Data Analysis to Describe and Classify Southern Resident Killer Whale Calls Speaker: Paul Nguyen Hong Duc (Carleton University) Date:\u00a0 Friday, February 3rd, 2023 Time:\u00a0 1:00 \u2013 2:00 p.m. Location: HP 4351 (Macphail Room) Abstract:\u00a0 The Southern Resident killer whale (SRKW) is an\u00a0endangered\u00a0\u00a0population of whales found in\u00a0the northeast Pacific. They have a vocal dialect […]<\/p>\n","protected":false},"author":44,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","_mi_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[1,3],"tags":[],"yoast_head":"\n