Fine-scale foraging movements by fish-eating killer whales ( Orcinus orca ) relate to the vertical distributions and escape responses of salmonid prey ( Oncorhynchus spp.)
We sought to quantitatively describe the fine-scale foraging behavior of northern resident killer whales ( ), a population of fish-eating killer whales that feeds almost exclusively on Pacific salmon ( spp.). To reconstruct the underwater movements of these specialist predators, we deployed 34 biolo...
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| Veröffentlicht in: | Movement ecology 2017, Vol.5, p.3-3 |
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| creator | Wright, Brianna M Ford, John K B Ellis, Graeme M Deecke, Volker B Shapiro, Ari Daniel Battaile, Brian C Trites, Andrew W |
| description | We sought to quantitatively describe the fine-scale foraging behavior of northern resident killer whales (
), a population of fish-eating killer whales that feeds almost exclusively on Pacific salmon (
spp.). To reconstruct the underwater movements of these specialist predators, we deployed 34 biologging Dtags on 32 individuals and collected high-resolution, three-dimensional accelerometry and acoustic data. We used the resulting dive paths to compare killer whale foraging behavior to the distributions of different salmonid prey species. Understanding the foraging movements of these threatened predators is important from a conservation standpoint, since prey availability has been identified as a limiting factor in their population dynamics and recovery.
Three-dimensional dive tracks indicated that foraging (
= 701) and non-foraging dives (
= 10,618) were kinematically distinct (Wilks' lambda:
= 0.321,
|
| doi_str_mv | 10.1186/s40462-017-0094-0 |
| format | Article |
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), a population of fish-eating killer whales that feeds almost exclusively on Pacific salmon (
spp.). To reconstruct the underwater movements of these specialist predators, we deployed 34 biologging Dtags on 32 individuals and collected high-resolution, three-dimensional accelerometry and acoustic data. We used the resulting dive paths to compare killer whale foraging behavior to the distributions of different salmonid prey species. Understanding the foraging movements of these threatened predators is important from a conservation standpoint, since prey availability has been identified as a limiting factor in their population dynamics and recovery.
Three-dimensional dive tracks indicated that foraging (
= 701) and non-foraging dives (
= 10,618) were kinematically distinct (Wilks' lambda:
= 0.321,
< 0.001). While foraging, killer whales dove deeper, remained submerged longer, swam faster, increased their dive path tortuosity, and rolled their bodies to a greater extent than during other activities. Maximum foraging dive depths reflected the deeper vertical distribution of Chinook (compared to other salmonids) and the tendency of Pacific salmon to evade predators by diving steeply. Kinematic characteristics of prey pursuit by resident killer whales also revealed several other escape strategies employed by salmon attempting to avoid predation, including increased swimming speeds and evasive maneuvering.
High-resolution dive tracks reconstructed using data collected by multi-sensor accelerometer tags found that movements by resident killer whales relate significantly to the vertical distributions and escape responses of their primary prey, Pacific salmon.</description><identifier>ISSN: 2051-3933</identifier><identifier>EISSN: 2051-3933</identifier><identifier>DOI: 10.1186/s40462-017-0094-0</identifier><identifier>PMID: 28239473</identifier><language>eng</language><publisher>England: BioMed Central</publisher><subject>Cetacea ; Oncorhynchus ; Oncorhynchus tshawytscha ; Orcinus orca</subject><ispartof>Movement ecology, 2017, Vol.5, p.3-3</ispartof><rights>Copyright BioMed Central 2017</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,864,4024,27923,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/28239473$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Wright, Brianna M</creatorcontrib><creatorcontrib>Ford, John K B</creatorcontrib><creatorcontrib>Ellis, Graeme M</creatorcontrib><creatorcontrib>Deecke, Volker B</creatorcontrib><creatorcontrib>Shapiro, Ari Daniel</creatorcontrib><creatorcontrib>Battaile, Brian C</creatorcontrib><creatorcontrib>Trites, Andrew W</creatorcontrib><title>Fine-scale foraging movements by fish-eating killer whales ( Orcinus orca ) relate to the vertical distributions and escape responses of salmonid prey ( Oncorhynchus spp.)</title><title>Movement ecology</title><addtitle>Mov Ecol</addtitle><description>We sought to quantitatively describe the fine-scale foraging behavior of northern resident killer whales (
), a population of fish-eating killer whales that feeds almost exclusively on Pacific salmon (
spp.). To reconstruct the underwater movements of these specialist predators, we deployed 34 biologging Dtags on 32 individuals and collected high-resolution, three-dimensional accelerometry and acoustic data. We used the resulting dive paths to compare killer whale foraging behavior to the distributions of different salmonid prey species. Understanding the foraging movements of these threatened predators is important from a conservation standpoint, since prey availability has been identified as a limiting factor in their population dynamics and recovery.
Three-dimensional dive tracks indicated that foraging (
= 701) and non-foraging dives (
= 10,618) were kinematically distinct (Wilks' lambda:
= 0.321,
< 0.001). While foraging, killer whales dove deeper, remained submerged longer, swam faster, increased their dive path tortuosity, and rolled their bodies to a greater extent than during other activities. Maximum foraging dive depths reflected the deeper vertical distribution of Chinook (compared to other salmonids) and the tendency of Pacific salmon to evade predators by diving steeply. Kinematic characteristics of prey pursuit by resident killer whales also revealed several other escape strategies employed by salmon attempting to avoid predation, including increased swimming speeds and evasive maneuvering.
High-resolution dive tracks reconstructed using data collected by multi-sensor accelerometer tags found that movements by resident killer whales relate significantly to the vertical distributions and escape responses of their primary prey, Pacific salmon.</description><subject>Cetacea</subject><subject>Oncorhynchus</subject><subject>Oncorhynchus tshawytscha</subject><subject>Orcinus orca</subject><issn>2051-3933</issn><issn>2051-3933</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNqNkc1q3DAQgEVpacI2D9BLEfSSHJTox5bsYwlNEwjkkp6XsXYUK7UlV5JT9pnyktHSFEpPncsMMx_fMAwhHwU_F6LTF7nhjZaMC8M47xvG35BjyVvBVK_U27_qI3KS8yOv0RsuTfeeHMlOqr4x6pg8X_mALFuYkLqY4MGHBzrHJ5wxlEyHPXU-jwyhHAY__DRhor_Gimd6Su-S9WHNNCYL9IwmnKAgLZGWEekTpuKrmO58LskPa_ExZAphR7EuXLDyeamtqoqOZpjmGPyOLgn3B3ewMY37YMe6IC_L-dkH8s7BlPHkNW_I96uv95fX7Pbu283ll1u2SC4La7h2VqM20jUAou0bDXLgznC0iMBb0woNCnsjJFqQpgenBysk6FY53qgNOf3tXVL8uWIu29lni9MEAeOat6LrhNFScv0fqJFtp3g1b8jnf9DHuKZQDzlQjZJ9BSv16ZVahxl32yX5GdJ---dj6gU4QZpM</recordid><startdate>2017</startdate><enddate>2017</enddate><creator>Wright, Brianna M</creator><creator>Ford, John K B</creator><creator>Ellis, Graeme M</creator><creator>Deecke, Volker B</creator><creator>Shapiro, Ari Daniel</creator><creator>Battaile, Brian C</creator><creator>Trites, Andrew W</creator><general>BioMed Central</general><scope>NPM</scope><scope>8FE</scope><scope>8FH</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>LK8</scope><scope>M7P</scope><scope>PATMY</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PYCSY</scope><scope>7X8</scope><scope>7SN</scope><scope>C1K</scope></search><sort><creationdate>2017</creationdate><title>Fine-scale foraging movements by fish-eating killer whales ( Orcinus orca ) relate to the vertical distributions and escape responses of salmonid prey ( Oncorhynchus spp.)</title><author>Wright, Brianna M ; 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), a population of fish-eating killer whales that feeds almost exclusively on Pacific salmon (
spp.). To reconstruct the underwater movements of these specialist predators, we deployed 34 biologging Dtags on 32 individuals and collected high-resolution, three-dimensional accelerometry and acoustic data. We used the resulting dive paths to compare killer whale foraging behavior to the distributions of different salmonid prey species. Understanding the foraging movements of these threatened predators is important from a conservation standpoint, since prey availability has been identified as a limiting factor in their population dynamics and recovery.
Three-dimensional dive tracks indicated that foraging (
= 701) and non-foraging dives (
= 10,618) were kinematically distinct (Wilks' lambda:
= 0.321,
< 0.001). While foraging, killer whales dove deeper, remained submerged longer, swam faster, increased their dive path tortuosity, and rolled their bodies to a greater extent than during other activities. Maximum foraging dive depths reflected the deeper vertical distribution of Chinook (compared to other salmonids) and the tendency of Pacific salmon to evade predators by diving steeply. Kinematic characteristics of prey pursuit by resident killer whales also revealed several other escape strategies employed by salmon attempting to avoid predation, including increased swimming speeds and evasive maneuvering.
High-resolution dive tracks reconstructed using data collected by multi-sensor accelerometer tags found that movements by resident killer whales relate significantly to the vertical distributions and escape responses of their primary prey, Pacific salmon.</abstract><cop>England</cop><pub>BioMed Central</pub><pmid>28239473</pmid><doi>10.1186/s40462-017-0094-0</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| source | PubMed Central Free; DOAJ Directory of Open Access Journals; SpringerNature Complete Journals; PubMed Central Open Access; Springer Nature OA Free Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | Cetacea Oncorhynchus Oncorhynchus tshawytscha Orcinus orca |
| title | Fine-scale foraging movements by fish-eating killer whales ( Orcinus orca ) relate to the vertical distributions and escape responses of salmonid prey ( Oncorhynchus spp.) |
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