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{"title"=>"Stop and smell the pollen: The role of olfaction and vision of the oriental honey buzzard in identifying food", "type"=>"journal", "authors"=>[{"first_name"=>"Shu Yi", "last_name"=>"Yang", "scopus_author_id"=>"56834732900"}, {"first_name"=>"Bruno A.", "last_name"=>"Walther", "scopus_author_id"=>"7006751190"}, {"first_name"=>"Guo Jing", "last_name"=>"Weng", "scopus_author_id"=>"26532152700"}], "year"=>2015, "source"=>"PLoS ONE", "identifiers"=>{"pmid"=>"26177533", "sgr"=>"84941345903", "doi"=>"10.1371/journal.pone.0130191", "scopus"=>"2-s2.0-84941345903", "pui"=>"605952177", "isbn"=>"1932-6203", "issn"=>"19326203"}, "id"=>"59ae962f-d4ec-37a7-a5bc-80eac5d94d07", "abstract"=>"The importance of olfaction for various avian behaviors has become increasingly evident. So far, the use of olfaction for food detection among raptors has only been demonstrated for Cathartes vultures. The Oriental honey buzzard (Pernis orientalis) is a resident and migrant in Taiwan and regularly forages in apiaries. One of its foods in apiaries is yellow pollen dough, a softball-sized mixture of pollen, soybeans, and sugar that beekeepers provide as a supplementary food for bees. Given that pollen dough is not similar to any naturally occurring food, we hypothesized that buzzards identify the dough's nutritious contents using olfaction, perhaps in combination with vision. Using a series of choice experiments in which individuals could choose between two doughs, we showed that (1) buzzards almost unerringly chose pollen-containing over pollen lacking doughs when otherwise the doughs were identical in size, shape, and yellow color; (2) buzzards always preferred yellow over black or green doughs if both doughs contained pollen; (3) buzzards still preferred pollen-containing over pollen-lacking doughs when both doughs were black, but at a lower rate than in (1). We statistically excluded the possible influences of the doughs' relative brightness or of repeat visits by the same individuals. Our experiments thus suggest the use of a 'multi-modal foraging strategy' among buzzards whereby olfaction and vision are likely to be both used in identifying food at close distances. We also estimated the olfactory receptor gene repertoire size in the buzzard's genome which is almost five times as large as that of three other raptor species. Therefore, olfaction is likely of far greater ecological importance to this species than to other raptor species. We suggest that olfaction should be considered in the design of behavioral and genetic studies to better understand the use of multiple senses in avian behaviors.", "link"=>"http://www.mendeley.com/research/stop-smell-pollen-role-olfaction-vision-oriental-honey-buzzard-identifying-food", "reader_count"=>22, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Researcher"=>3, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>2, "Other"=>1, "Student > Master"=>3, "Student > Bachelor"=>3}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Researcher"=>3, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>2, "Other"=>1, "Student > Master"=>3, "Student > Bachelor"=>3}, "reader_count_by_subject_area"=>{"Engineering"=>1, "Unspecified"=>3, "Environmental Science"=>1, "Biochemistry, Genetics and Molecular Biology"=>1, "Agricultural and Biological Sciences"=>14, "Veterinary Science and Veterinary Medicine"=>2}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>14}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Unspecified"=>{"Unspecified"=>3}, "Environmental Science"=>{"Environmental Science"=>1}, "Veterinary Science and Veterinary Medicine"=>{"Veterinary Science and Veterinary Medicine"=>2}}, "reader_count_by_country"=>{"New Zealand"=>1, "Canada"=>1, "Netherlands"=>1, "Brazil"=>1}, "group_count"=>0}

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• http://doi.org/10.1007/s10886-018-0962-0
• http://doi.org/10.1016/j.oftal.2016.11.019
• http://doi.org/10.1002/ece3.6622
• http://doi.org/10.1016/j.anbehav.2016.11.011
• http://doi.org/10.1007/s10071-018-1220-0
• http://doi.org/10.1111/jav.01728
• http://doi.org/10.1093/zoolinnean/zlz121
• http://doi.org/10.1038/s41598-017-17794-0
• http://doi.org/10.1038/s41598-019-38680-x
• http://doi.org/10.1021/acschembio.0c00541
• http://doi.org/10.1016/j.oftale.2017.03.006

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Article Coverage Curated

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• {"url"=>"http%3A%2F%2Fjournals.plos.org%2Fplosone%2Farticle%3Fid%3D10.1371%252Fjournal.pone.0130191", "share_count"=>8, "like_count"=>4, "comment_count"=>5, "click_count"=>0, "total_count"=>17}

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• {"id"=>"621386801329111040", "text"=>"#PLOSONE: Stop and Smell the Pollen: The Role of Olfaction and Vision of the Oriental Honey Buzzard in Identi ... http://t.co/3l9kI2O19m", "created_at"=>"2015-07-15T18:32:12Z", "user"=>"byzant69", "user_name"=>"Sergii Tukaiev", "user_profile_image"=>"http://pbs.twimg.com/profile_images/490590048329289728/9q4cT_dI_normal.jpeg"}
• {"id"=>"621599647220391936", "text"=>"ヨーロッパノスリという鷹は獲物を見つけるのに視覚だけでなく、嗅覚にも頼っている。Stop and Smell the Pollen: The Role of Olfaction and Vision of the Oriental …http://t.co/hQAvPOu1FK", "created_at"=>"2015-07-16T08:37:59Z", "user"=>"uranus_2", "user_name"=>"マーキュリー２世", "user_profile_image"=>"http://pbs.twimg.com/profile_images/520761051646676992/x2e9wBQE_normal.png"}
• {"id"=>"621795763656351744", "text"=>"That's right, a Honey Buzzard: \"The Role of Olfaction and Vision of the Oriental Honey Buzzard in Identifying Food\" http://t.co/i1Up77GqMD", "created_at"=>"2015-07-16T21:37:17Z", "user"=>"soltoseedfarm", "user_name"=>"Sol to Seed Farm", "user_profile_image"=>"http://pbs.twimg.com/profile_images/580916551441756160/Ifdl1VEo_normal.jpg"}
• {"id"=>"621798973075013632", "text"=>"RT @soltoseedfarm: That's right, a Honey Buzzard: \"The Role of Olfaction and Vision of the Oriental Honey Buzzard in Identifying Food\" http…", "created_at"=>"2015-07-16T21:50:02Z", "user"=>"SandySom", "user_name"=>"Rebecca Sandover", "user_profile_image"=>"http://pbs.twimg.com/profile_images/3282261256/2ce9f273226d770137f1a061c5a37fe0_normal.png"}
• {"id"=>"621805054090178565", "text"=>"RT @soltoseedfarm: That's right, a Honey Buzzard: \"The Role of Olfaction and Vision of the Oriental Honey Buzzard in Identifying Food\" http…", "created_at"=>"2015-07-16T22:14:12Z", "user"=>"aqua8co", "user_name"=>"Aquaponics Co", "user_profile_image"=>"http://pbs.twimg.com/profile_images/412436988139016193/oDy40ls8_normal.jpeg"}
• {"id"=>"622446066701459456", "text"=>"#PLOSONE: Stop and Smell the Pollen: The Role of Olfaction and Vision of the Oriental Honey Buzzard in Identi ... http://t.co/wcZupQvrzw", "created_at"=>"2015-07-18T16:41:21Z", "user"=>"bawalther2009", "user_name"=>"Bruno Walther", "user_profile_image"=>"http://abs.twimg.com/sticky/default_profile_images/default_profile_4_normal.png"}

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Figshare

• {"files"=>["https://ndownloader.figshare.com/files/2176534"], "description"=>"<div><p>The importance of olfaction for various avian behaviors has become increasingly evident. So far, the use of olfaction for food detection among raptors has only been demonstrated for <i>Cathartes</i> vultures. The Oriental honey buzzard (<i>Pernis orientalis</i>) is a resident and migrant in Taiwan and regularly forages in apiaries. One of its foods in apiaries is yellow pollen dough, a softball-sized mixture of pollen, soybeans, and sugar that beekeepers provide as a supplementary food for bees. Given that pollen dough is not similar to any naturally occurring food, we hypothesized that buzzards identify the dough’s nutritious contents using olfaction, perhaps in combination with vision. Using a series of choice experiments in which individuals could choose between two doughs, we showed that (1) buzzards almost unerringly chose pollen-containing over pollen lacking doughs when otherwise the doughs were identical in size, shape, and yellow color; (2) buzzards always preferred yellow over black or green doughs if both doughs contained pollen; (3) buzzards still preferred pollen-containing over pollen-lacking doughs when both doughs were black, but at a lower rate than in (1). We statistically excluded the possible influences of the doughs’ relative brightness or of repeat visits by the same individuals. Our experiments thus suggest the use of a ‘multi-modal foraging strategy’ among buzzards whereby olfaction and vision are likely to be both used in identifying food at close distances. We also estimated the olfactory receptor gene repertoire size in the buzzard’s genome which is almost five times as large as that of three other raptor species. Therefore, olfaction is likely of far greater ecological importance to this species than to other raptor species. We suggest that olfaction should be considered in the design of behavioral and genetic studies to better understand the use of multiple senses in avian behaviors.</p></div>", "links"=>[], "tags"=>["raptor species", "olfaction", "pollen dough", "receptor gene repertoire size", "Oriental Honey Buzzard"], "article_id"=>1483867, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Shu-Yi Yang", "Bruno A. Walther", "Guo-Jing Weng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130191", "stats"=>{"downloads"=>6, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Stop_and_Smell_the_Pollen_The_Role_of_Olfaction_and_Vision_of_the_Oriental_Honey_Buzzard_in_Identifying_Food_/1483867", "title"=>"Stop and Smell the Pollen: The Role of Olfaction and Vision of the Oriental Honey Buzzard in Identifying Food", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2015-07-15 03:36:58"}
• {"files"=>["https://ndownloader.figshare.com/files/2176533"], "description"=>"<p>Column 1: for each experiment’s identifier, see <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#sec002\" target=\"_blank\">Methods</a> and Figs <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.g002\" target=\"_blank\">2</a>–<a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.g004\" target=\"_blank\">4</a>. N_r, number of repetitions of each experiment which we carried out; N_v, number of experiments visited by Oriental honey buzzards (with the percentage in parentheses); N_e, number of all foraging events; N_i, number of individual-based foraging events; N_ind, number of identified individuals which is hence the minimum number of individuals for testing our hypotheses.</p><p>Numbers of repetitions and visits of each experiment.</p>", "links"=>[], "tags"=>["raptor species", "olfaction", "pollen dough", "receptor gene repertoire size", "Oriental Honey Buzzard"], "article_id"=>1483866, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Shu-Yi Yang", "Bruno A. Walther", "Guo-Jing Weng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130191.t001", "stats"=>{"downloads"=>0, "page_views"=>10, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Numbers_of_repetitions_and_visits_of_each_experiment_/1483866", "title"=>"Numbers of repetitions and visits of each experiment.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2015-07-15 03:36:58"}
• {"files"=>["https://ndownloader.figshare.com/files/2176528"], "description"=>"<p>Open and solid bars as in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.g002\" target=\"_blank\">Fig 2</a>.</p>", "links"=>[], "tags"=>["raptor species", "olfaction", "pollen dough", "receptor gene repertoire size", "Oriental Honey Buzzard"], "article_id"=>1483861, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Shu-Yi Yang", "Bruno A. Walther", "Guo-Jing Weng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130191.g003", "stats"=>{"downloads"=>0, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Number_of_foraging_events_in_experiment_2_where_the_treatment_is_color_yellow_versus_black_or_green_in_doughs_containing_pollen_Table_1_/1483861", "title"=>"Number of foraging events in experiment 2 where the treatment is color (yellow versus black or green) in doughs containing pollen (Table 1).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-07-15 03:36:58"}
• {"files"=>["https://ndownloader.figshare.com/files/2176524"], "description"=>"<p>See <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.s001\" target=\"_blank\">S1 File</a> for names and coordinates of the apiaries.</p>", "links"=>[], "tags"=>["raptor species", "olfaction", "pollen dough", "receptor gene repertoire size", "Oriental Honey Buzzard"], "article_id"=>1483857, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Shu-Yi Yang", "Bruno A. Walther", "Guo-Jing Weng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130191.g001", "stats"=>{"downloads"=>1, "page_views"=>7, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Distribution_of_eight_apiaries_in_central_and_southern_Taiwan_where_our_216_two_choice_experiments_were_conducted_/1483857", "title"=>"Distribution of eight apiaries in central and southern Taiwan where our 216 two-choice experiments were conducted.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-07-15 03:36:58"}
• {"files"=>["https://ndownloader.figshare.com/files/2176532"], "description"=>"<p>Open and grey bars represent the estimated total number of functional and non-functional OR genes, respectively. Data are from this study (OHB = Oriental honey buzzard), Warren et al. [<a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.ref041\" target=\"_blank\">41</a>] (zebra finch), Zhan et al. [<a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.ref042\" target=\"_blank\">42</a>] (falcon 1 = peregrine falcon, falcon 2 = saker falcon), Doyle et al. [<a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.ref043\" target=\"_blank\">43</a>] (golden eagle) and Steiger et al. [<a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.ref038\" target=\"_blank\">38</a>] (all other species). Note that Doyle et al. [<a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.ref043\" target=\"_blank\">43</a>] did not distinguish between the number of functional and non-functional OR gene.</p>", "links"=>[], "tags"=>["raptor species", "olfaction", "pollen dough", "receptor gene repertoire size", "Oriental Honey Buzzard"], "article_id"=>1483865, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Shu-Yi Yang", "Bruno A. Walther", "Guo-Jing Weng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130191.g006", "stats"=>{"downloads"=>1, "page_views"=>8, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_estimated_OR_gene_repertoire_sizes_of_13_species_of_birds_representing_eight_orders_/1483865", "title"=>"The estimated OR gene repertoire sizes of 13 species of birds representing eight orders.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-07-15 03:36:58"}
• {"files"=>["https://ndownloader.figshare.com/files/2176530"], "description"=>"<p>Open and dark grey bars as in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130191#pone.0130191.g002\" target=\"_blank\">Fig 2</a>, whereby dark grey bars means that the first chosen dough contained only two ingredients.</p>", "links"=>[], "tags"=>["raptor species", "olfaction", "pollen dough", "receptor gene repertoire size", "Oriental Honey Buzzard"], "article_id"=>1483863, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Shu-Yi Yang", "Bruno A. Walther", "Guo-Jing Weng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130191.g004", "stats"=>{"downloads"=>2, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Number_of_foraging_events_in_experiment_3_where_the_treatment_is_presence_or_absence_of_pollen_in_black_doughs_Table_1_/1483863", "title"=>"Number of foraging events in experiment 3 where the treatment is presence or absence of pollen in black doughs (Table 1).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-07-15 03:36:58"}
• {"files"=>["https://ndownloader.figshare.com/files/2176531"], "description"=>"<p>(a) Yellow dough with all three ingredients (black line); yellow dough without pollen (red line); yellow dough without soybean (blue line); yellow dough without sugar (green line). (b) Black doughs with all three ingredients (black line); black doughs without pollen (red line); green doughs with all three ingredients (green line).</p>", "links"=>[], "tags"=>["raptor species", "olfaction", "pollen dough", "receptor gene repertoire size", "Oriental Honey Buzzard"], "article_id"=>1483864, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Shu-Yi Yang", "Bruno A. Walther", "Guo-Jing Weng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130191.g005", "stats"=>{"downloads"=>0, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Spectra_of_reflected_light_by_doughs_in_two_choice_experiments_/1483864", "title"=>"Spectra of reflected light by doughs in two-choice experiments.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-07-15 03:36:58"}
• {"files"=>["https://ndownloader.figshare.com/files/2176525"], "description"=>"<p>Open bars: number of events feeding on only one dough; light grey bars: number of events feeding on both doughs, whereby the first chosen dough contained all three ingredients; dark grey bars: number of events feeding on both doughs, whereby the first chosen dough contained only two ingredients.</p>", "links"=>[], "tags"=>["raptor species", "olfaction", "pollen dough", "receptor gene repertoire size", "Oriental Honey Buzzard"], "article_id"=>1483858, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Shu-Yi Yang", "Bruno A. Walther", "Guo-Jing Weng"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0130191.g002", "stats"=>{"downloads"=>2, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Number_of_foraging_events_in_experiment_1_where_the_treatment_is_presence_or_absence_of_a_pollen_b_soybean_and_c_sugar_in_yellow_doughs_Table_1_/1483858", "title"=>"Number of foraging events in experiment 1 where the treatment is presence or absence of (a) pollen, (b) soybean and (c) sugar in yellow doughs (Table 1).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-07-15 03:36:58"}

PMC Usage Stats | Further Information

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• {"unique-ip"=>"13", "full-text"=>"13", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"5"}
• {"unique-ip"=>"8", "full-text"=>"7", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"8"}
• {"unique-ip"=>"6", "full-text"=>"7", "pdf"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"9"}
• {"unique-ip"=>"17", "full-text"=>"23", "pdf"=>"7", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"10"}
• {"unique-ip"=>"14", "full-text"=>"11", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"12"}
• {"unique-ip"=>"10", "full-text"=>"12", "pdf"=>"5", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"2"}
• {"unique-ip"=>"18", "full-text"=>"17", "pdf"=>"5", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2020", "month"=>"3"}
• {"unique-ip"=>"15", "full-text"=>"16", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"4"}
• {"unique-ip"=>"17", "full-text"=>"13", "pdf"=>"5", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"5"}
• {"unique-ip"=>"16", "full-text"=>"22", "pdf"=>"6", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"6"}
• {"unique-ip"=>"6", "full-text"=>"4", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"7"}
• {"unique-ip"=>"11", "full-text"=>"3", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"8"}
• {"unique-ip"=>"7", "full-text"=>"7", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"9"}
• {"unique-ip"=>"12", "full-text"=>"12", "pdf"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"10"}
• {"unique-ip"=>"12", "full-text"=>"12", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"11"}
• {"unique-ip"=>"7", "full-text"=>"10", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2020", "month"=>"12"}
• {"unique-ip"=>"8", "full-text"=>"6", "pdf"=>"3", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2021", "month"=>"1"}
• {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2021", "month"=>"2"}

Relative Metric

{"start_date"=>"2015-01-01T00:00:00Z", "end_date"=>"2015-12-31T00:00:00Z", "subject_areas"=>[]}

F1000Prime