{"id":48,"date":"2015-11-01T04:36:40","date_gmt":"2015-11-01T04:36:40","guid":{"rendered":"http:\/\/studentblogs.viu.ca\/ornithology\/?p=17"},"modified":"2017-08-23T17:31:59","modified_gmt":"2017-08-23T17:31:59","slug":"foraging-behavior","status":"publish","type":"post","link":"https:\/\/wordpress.viu.ca\/biol325\/2015\/11\/01\/foraging-behavior\/","title":{"rendered":"Foraging behavior"},"content":{"rendered":"
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Marbled Murrelet diving \u00a9Mike Danzenbaker<\/p>\n<\/div>\n

Marbled Murrelets are an interesting little bird, as many aspects of their life are unknown. One area that has received some recent attention is related to their foraging behaviour.\u00a0 As their primary food sources (fish and small crustaceans) tend to be dispersed over large areas (Muirhead et all 2013, Pontius,Kirchhoff 2009), they need efficient strategies to find food for themselves as well as for any offspring. One such strategy is using the presence of whales (specifically gray whales) as an indicator of food supply. This behaviour is likely linked to seasonal availability of food as well as the needs of the chick (Muirhead et all<\/em> 2013).<\/p>\n

Marbled Murrelets eat up to 28% of their body weight in a day, but they have the capacity to increase their food uptake during such times as breeding (Pointus , Kirchhoff 2009).<\/p>\n

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Marbled Murrelet at sea
\nphoto credit Keven T. Karlson<\/p>\n<\/div>\n

When they are caring for young, the adults must factor in the additional cost of bringing food back to the baby. As they are efficient at catching their prey, they will invest more of their time into diving for food (Pontius, Kirchhoff 2009, Peery et all <\/em>2009). In order to do this, they increase the number of dives they do, rather than the length of each dive (Peery et all<\/em> 2009).<\/p>\n

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Sources\u00a0<\/strong><\/p>\n

Muirhead, K.A, et all.<\/em> 2013. Marbled Murrelets ( Brachyramphus marmoratus) foraging with gray whales (Eschrichtius robustus) off Vancouver Island, British Columbia<\/em>. Canadian Journal of Zoology, Vol.91 No.12 pp. 847-852<\/p>\n

Peery, M. Zachariah et all<\/em>. 2009. Meeting Reproductive Demands in a Dynamic Upwelling System: Foraging Strategies of a Pursuit-Diving Seabird, the Marbled Murrelet<\/em>. The Condor Vol. 111 No.1. pp. 120-134<\/p>\n

Pontius, Kira.E., Kirchhoff, Matthew .D.\u00a0 2009. Prey-Capture by Marbled Murrelets in Southeast Alaska.<\/em> Northwestern Naturalist Vo. 90 pp. 151-155<\/p>\n

Images<\/p>\n

\u00a0<\/b>Diving Marbled Murrelet \u2013\u00a0Mike Danzenbak<\/i> \u00a0http:\/\/www.avesphoto.com\/website\/WD\/species\/MURMAR-19.htm <\/a>\u00a0 accessed Nov 2 2015<\/span><\/p>\n

Keven T. Karlson \u00a0http:\/\/kevinkarlsonphotography.com\/gallery\/v\/seabirds\/Marbled+Murrelet_+AK_+May.jpg.html<\/a>\u00a0accessed Nov 2<\/p>\n

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Marbled Murrelets are an interesting little bird, as many aspects of their life are unknown. One area that has received some recent attention is related to their foraging behaviour.  As their primary food sources (fish and small crustaceans) tend to … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":296,"featured_media":174,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[17],"tags":[15],"class_list":["post-48","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-krystal","tag-uncategorized"],"_links":{"self":[{"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/posts\/48","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/users\/296"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/comments?post=48"}],"version-history":[{"count":2,"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/posts\/48\/revisions"}],"predecessor-version":[{"id":175,"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/posts\/48\/revisions\/175"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/media\/174"}],"wp:attachment":[{"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/media?parent=48"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/categories?post=48"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.viu.ca\/biol325\/wp-json\/wp\/v2\/tags?post=48"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}