{"id":94,"date":"2022-05-07T05:47:03","date_gmt":"2022-05-07T05:47:03","guid":{"rendered":"https:\/\/src.cikeys.com\/2022\/?page_id=94"},"modified":"2023-02-15T05:24:45","modified_gmt":"2023-02-15T05:24:45","slug":"measuring-calf-age-structure-in-a-population-of-humpback-whales-in-maui-hi-based-on-calf-dorsal-fin-curvature","status":"publish","type":"page","link":"https:\/\/src.cikeys.com\/2022\/measuring-calf-age-structure-in-a-population-of-humpback-whales-in-maui-hi-based-on-calf-dorsal-fin-curvature\/","title":{"rendered":"Measuring Calf Age Structure in a Population of Humpback Whales in Maui, HI Based on Calf Dorsal Fin Curvature"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Natalie Perez, Isabelle Mandon, Viviana Celaya, Megan Daniels, and Dr. Clare Steele<\/h3>\n\n\n\n<!--more-->\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Abstract<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Humpback whales travel thousands of miles to Hawaii each year to breed and give birth to their calves. To examine calf age structure within the humpback whale population visiting\/inhabiting the \u2018Au\u2019Au Channel, between Maui and Lanai, we observed mother and calf pairs in January 2022. Relative age of humpback calves can be determined by the degree to which the dorsal fin is furled. In utero, the fetal dorsal fin is furled, and after birth the presence of fetal folds and the angle of the dorsal fin can be used as indicators of calf age. We performed focal-follows of mother-calf pairs for 15 minutes, noting behaviors displayed of mom, calf, and escort(s) if present. During focal-follows, we positioned the boat behind calves to capture images of their dorsal fins. The images of the calf\u2019s dorsal fin were taken from directly behind, as close to the six o\u2019clock position as possible. The angle of the fin relative to the horizontal axis was measured in Adobe Photoshop. We used this technique to describe the age structure of the calf population and to test whether calf age influenced geographical location or speed of travel. Our research was conducted under NOAA NMFS permit #22750-01.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Presentation<\/h2>\n\n\n<iframe loading=\"lazy\"  id=\"_ytid_38518\"  width=\"720\" height=\"405\"  data-origwidth=\"720\" data-origheight=\"405\"  data-relstop=\"1\" src=\"https:\/\/www.youtube.com\/embed\/5abFZluy3Sw?enablejsapi=1&#038;autoplay=0&#038;cc_load_policy=0&#038;cc_lang_pref=&#038;iv_load_policy=1&#038;loop=0&#038;rel=0&#038;fs=1&#038;playsinline=0&#038;autohide=2&#038;theme=dark&#038;color=red&#038;controls=1&#038;disablekb=0&#038;\" class=\"__youtube_prefs__  no-lazyload\" title=\"YouTube player\"  allow=\"fullscreen; accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen data-no-lazy=\"1\" data-skipgform_ajax_framebjll=\"\"><\/iframe>\n\n\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-5c92c58c-53c2-4669-bc3e-3db1d1110f84\" href=\"https:\/\/src.cikeys.com\/2022\/wp-content\/uploads\/2022\/05\/Natalie-Perez-Measuring-Calf-Age-Structure.pdf\">Presentation File<\/a><a href=\"https:\/\/src.cikeys.com\/2022\/wp-content\/uploads\/2022\/05\/Natalie-Perez-Measuring-Calf-Age-Structure.pdf\" class=\"wp-block-file__button\" download aria-describedby=\"wp-block-file--media-5c92c58c-53c2-4669-bc3e-3db1d1110f84\">Download<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<iframe src=\"http:\/\/docs.google.com\/gview?url=https:\/\/src.cikeys.com\/2022\/wp-content\/uploads\/2022\/05\/Natalie-Perez-Measuring-Calf-Age-Structure.pdf&#038;embedded=true\" style=\"width:100%; height:600px;\" frameborder=\"0\"><\/iframe>\n","protected":false},"excerpt":{"rendered":"<p>Natalie Perez, Isabelle Mandon, Viviana Celaya, Megan Daniels, and Dr. Clare Steele<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[4],"tags":[14],"class_list":["post-94","page","type-page","status-publish","hentry","category-poster","tag-environmental-science-and-resource-management","post"],"_links":{"self":[{"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/pages\/94","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/comments?post=94"}],"version-history":[{"count":3,"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/pages\/94\/revisions"}],"predecessor-version":[{"id":685,"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/pages\/94\/revisions\/685"}],"wp:attachment":[{"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/media?parent=94"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/categories?post=94"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/src.cikeys.com\/2022\/wp-json\/wp\/v2\/tags?post=94"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}