Super-Aggregations of Krill and Humpback Whales in Wilhelmina Bay, Antarctic Peninsula
Publication Date
April 27, 2011
Journal
PLOS ONE
Authors
Douglas P. Nowacek, Ari S. Friedlaender, Patrick N. Halpin, Elliott L. Hazen, et al
Volume
6
Issue
4
Pages
e19173
DOI
https://dx.plos.org/10.1371/journal.pone.0019173
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0019173
PubMed
http://www.ncbi.nlm.nih.gov/pubmed/21556153
PubMed Central
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3083408
Europe PMC
http://europepmc.org/abstract/MED/21556153
Web of Science
000290019400036
Scopus
79955685544
Mendeley
http://www.mendeley.com/research/superaggregations-krill-humpback-whales-wilhelmina-bay-antarctic-peninsula
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Mendeley | Further Information

{"title"=>"Super-aggregations of krill and humpback whales in Wilhelmina bay, Antarctic Peninsula", "type"=>"journal", "authors"=>[{"first_name"=>"Douglas P.", "last_name"=>"Nowacek", "scopus_author_id"=>"6603551887"}, {"first_name"=>"Ari S.", "last_name"=>"Friedlaender", "scopus_author_id"=>"6603658430"}, {"first_name"=>"Patrick N.", "last_name"=>"Halpin", "scopus_author_id"=>"6603899068"}, {"first_name"=>"Elliott L.", "last_name"=>"Hazen", "scopus_author_id"=>"6701672142"}, {"first_name"=>"David W.", "last_name"=>"Johnston", "scopus_author_id"=>"55574221834"}, {"first_name"=>"Andrew J.", "last_name"=>"Read", "scopus_author_id"=>"7201726315"}, {"first_name"=>"Boris", "last_name"=>"Espinasse", "scopus_author_id"=>"39061142000"}, {"first_name"=>"Meng", "last_name"=>"Zhou", "scopus_author_id"=>"55315014900"}, {"first_name"=>"Yiwu", "last_name"=>"Zhu", "scopus_author_id"=>"8971385900"}], "year"=>2011, "source"=>"PLoS ONE", "identifiers"=>{"doi"=>"10.1371/journal.pone.0019173", "sgr"=>"79955685544", "issn"=>"19326203", "pui"=>"361717716", "isbn"=>"1932-6203", "pmid"=>"21556153", "scopus"=>"2-s2.0-79955685544"}, "id"=>"b43dff1e-074f-3494-844c-8990d55b1262", "abstract"=>"Ecological relationships of krill and whales have not been explored in the Western Antarctic Peninsula (WAP), and have only rarely been studied elsewhere in the Southern Ocean. In the austral autumn we observed an extremely high density (5.1 whales per km(2)) of humpback whales (Megaptera novaeangliae) feeding on a super-aggregation of Antarctic krill (Euphausia superba) in Wilhelmina Bay. The krill biomass was approximately 2 million tons, distributed over an area of 100 km(2) at densities of up to 2000 individuals m(-3); reports of such 'super-aggregations' of krill have been absent in the scientific literature for >20 years. Retentive circulation patterns in the Bay entrained phytoplankton and meso-zooplankton that were grazed by the krill. Tagged whales rested during daylight hours and fed intensively throughout the night as krill migrated toward the surface. We infer that the previously unstudied WAP embayments are important foraging areas for whales during autumn and, furthermore, that meso-scale variation in the distribution of whales and their prey are important features of this system. Recent decreases in the abundance of Antarctic krill around the WAP have been linked to reductions in sea ice, mediated by rapid climate change in this area. At the same time, baleen whale populations in the Southern Ocean, which feed primarily on krill, are recovering from past exploitation. Consideration of these features and the effects of climate change on krill dynamics are critical to managing both krill harvests and the recovery of baleen whales in the Southern Ocean.", "link"=>"http://www.mendeley.com/research/superaggregations-krill-humpback-whales-wilhelmina-bay-antarctic-peninsula", "reader_count"=>156, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Professor > Associate Professor"=>1, "Researcher"=>35, "Student > Doctoral Student"=>3, "Student > Ph. D. Student"=>37, "Student > Postgraduate"=>5, "Student > Master"=>27, "Other"=>14, "Student > Bachelor"=>26, "Professor"=>6}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Professor > Associate Professor"=>1, "Researcher"=>35, "Student > Doctoral Student"=>3, "Student > Ph. D. Student"=>37, "Student > Postgraduate"=>5, "Student > Master"=>27, "Other"=>14, "Student > Bachelor"=>26, "Professor"=>6}, "reader_count_by_subject_area"=>{"Unspecified"=>9, "Environmental Science"=>27, "Agricultural and Biological Sciences"=>103, "Arts and Humanities"=>1, "Psychology"=>1, "Social Sciences"=>1, "Earth and Planetary Sciences"=>13, "Linguistics"=>1}, "reader_count_by_subdiscipline"=>{"Social Sciences"=>{"Social Sciences"=>1}, "Psychology"=>{"Psychology"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>13}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>103}, "Linguistics"=>{"Linguistics"=>1}, "Unspecified"=>{"Unspecified"=>9}, "Environmental Science"=>{"Environmental Science"=>27}, "Arts and Humanities"=>{"Arts and Humanities"=>1}}, "reader_count_by_country"=>{"New Zealand"=>1, "Czech Republic"=>1, "United States"=>4, "Uruguay"=>1, "Japan"=>1, "Brazil"=>1, "Italy"=>1, "United Kingdom"=>1, "Chile"=>1, "Iceland"=>1, "Spain"=>1}, "group_count"=>3}

CrossRef

Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/781019"], "description"=>"<p>We used humpback whale abundance estimates from line transect surveys described in our results.</p>", "links"=>[], "tags"=>["antarctic", "krill", "306", "humpback", "whales", "counted", "wilhelmina", "wap", "54-day", "stammerjohn", "et", "estimates", "reilly"], "article_id"=>451368, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Douglas P. Nowacek", "Ari S. Friedlaender", "Patrick N. Halpin", "Elliott L. Hazen", "David W. Johnston", "Andrew J. Read", "Boris Espinasse", "Meng Zhou", "Yiwu Zhu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0019173.t001", "stats"=>{"downloads"=>3, "page_views"=>13, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Estimated_consumption_of_Antarctic_krill_by_the_306_humpback_whales_we_counted_in_Wilhelmina_Bay_WAP_during_the_54_day_change_in_the_timing_of_sea_ice_advance_described_by_Stammerjohn_et_al_15_and_using_the_daily_consumption_rate_estimates_from_Reilly_et/451368", "title"=>"Estimated consumption of Antarctic krill by the 306 humpback whales we counted in Wilhelmina Bay, WAP during the 54-day change in the timing of sea ice advance described by Stammerjohn et al. [15] and using the daily consumption rate estimates from Reilly et al. [27].", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-02-20 18:57:35"}
  • {"files"=>["https://ndownloader.figshare.com/files/780906"], "description"=>"<p>Daytime resting behavior is indicated by the lack of dives. The exploratory deep dive at ∼1430 h local to 370 m is the deepest recorded dive for a humpback. The whale's diving behavior as measured by the DTag tracked the vertical movement of krill at night. Krill density was measured within 100 s of meters from the tagged whale (confirmed by surface observations and radio tracking).</p>", "links"=>[], "tags"=>["dive", "krill"], "article_id"=>451267, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Douglas P. Nowacek", "Ari S. Friedlaender", "Patrick N. Halpin", "Elliott L. Hazen", "David W. Johnston", "Andrew J. Read", "Boris Espinasse", "Meng Zhou", "Yiwu Zhu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0019173.g002", "stats"=>{"downloads"=>2, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Humpback_whale_dive_profile_and_krill_biomass_/451267", "title"=>"Humpback whale dive profile and krill biomass.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-20 18:57:00"}
  • {"files"=>["https://ndownloader.figshare.com/files/780737"], "description"=>"<p>Southerly katabatic winds and coastal currents produced the circulation field and retentive gyre shown in (a). Panel (b) shows the krill super-aggregation, scaled for biomass concentrations from 0.1–100 kg/m<sup>2</sup>. The white line indicates the transect followed to collect the data shown in (d). Humpback whale sightings (5.1 whales/km<sup>2</sup>) and surveys are shown in (c). Panel (d) shows meso-zooplankton (top), chlorophyll concentration (middle), and the vertical profile of the krill super-aggregation margin from south to north along the x-axis. High chlorophyll levels indicate a fall bloom; the lack of meso-zooplankton in the area of the krill aggregation is likely due to krill grazing.</p>", "links"=>[], "tags"=>["wilhelmina"], "article_id"=>451093, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Douglas P. Nowacek", "Ari S. Friedlaender", "Patrick N. Halpin", "Elliott L. Hazen", "David W. Johnston", "Andrew J. Read", "Boris Espinasse", "Meng Zhou", "Yiwu Zhu"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0019173.g001", "stats"=>{"downloads"=>1, "page_views"=>25, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_physical_and_biological_environment_of_Wilhelmina_Bay_WAP_May_2009_/451093", "title"=>"The physical and biological environment of Wilhelmina Bay, WAP, May 2009.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-20 18:56:01"}

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Relative Metric

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