The Nutritional Content of Prey Affects the Foraging of a Generalist Arthropod Predator
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{"title"=>"The Nutritional Content of Prey Affects the Foraging of a Generalist Arthropod Predator", "type"=>"journal", "authors"=>[{"first_name"=>"Jason M.", "last_name"=>"Schmidt", "scopus_author_id"=>"16239660100"}, {"first_name"=>"Peter", "last_name"=>"Sebastian", "scopus_author_id"=>"55480116300"}, {"first_name"=>"Shawn M.", "last_name"=>"Wilder", "scopus_author_id"=>"7003532385"}, {"first_name"=>"Ann L.", "last_name"=>"Rypstra", "scopus_author_id"=>"7003286863"}], "year"=>2012, "source"=>"PLoS ONE", "identifiers"=>{"scopus"=>"2-s2.0-84869054547", "pui"=>"366041861", "sgr"=>"84869054547", "isbn"=>"1932-6203", "issn"=>"19326203", "pmid"=>"23145130", "doi"=>"10.1371/journal.pone.0049223"}, "id"=>"b9bad899-78f0-336c-8c76-0e21d30014be", "abstract"=>"While foraging theory predicts that predatory responses should be determined by the energy content and size of prey, it is becoming increasingly clear that carnivores regulate their intake of specific nutrients. We tested the hypothesis that prey nutrient composition and predator nutritional history affects foraging intensity, consumption, and prey selection by the wolf spider, Pardosa milvina. By altering the rearing environment for fruit flies, Drosophila melanogaster, we produced high quality flies containing more nitrogen and protein and less lipid than low quality fruit flies. In one experiment, we quantified the proportion of flies taken and consumption across a range of densities of either high or low quality flies and, in a second experiment, we determined the prey capture and consumption of spiders that had been maintained on contrasting diets prior to testing. In both cases, the proportion of prey captured declined with increasing prey density, which characterizes the Type II functional response that is typical of wolf spiders. Spiders with similar nutritional histories killed similar numbers of each prey type but consumed more of the low quality prey. Spiders provided high quality prey in the weeks prior to testing killed more prey than those on the low quality diet but there was no effect of prior diet on consumption. In the third experiment, spiders were maintained on contrasting diets for three weeks and then allowed to select from a mixture of high and low quality prey. Interestingly, feeding history affected prey preferences: spiders that had been on a low quality diet showed no preference but those on the high quality diet selected high quality flies from the mixture. Our results suggest that, even when prey size and species identity are controlled, the nutritional experience of the predator as well as the specific content of the prey shapes predator-prey interactions.", "link"=>"http://www.mendeley.com/research/nutritional-content-prey-affects-foraging-generalist-arthropod-predator", "reader_count"=>62, "reader_count_by_academic_status"=>{"Unspecified"=>6, "Professor > Associate Professor"=>1, "Researcher"=>12, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>19, "Student > Postgraduate"=>2, "Student > Master"=>13, "Other"=>1, "Student > Bachelor"=>4, "Lecturer"=>1, "Professor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>6, "Professor > Associate Professor"=>1, "Researcher"=>12, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>19, "Student > Postgraduate"=>2, "Student > Master"=>13, "Other"=>1, "Student > Bachelor"=>4, "Lecturer"=>1, "Professor"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>10, "Environmental Science"=>11, "Nursing and Health Professions"=>1, "Agricultural and Biological Sciences"=>36, "Medicine and Dentistry"=>1, "Neuroscience"=>1, "Arts and Humanities"=>1, "Physics and Astronomy"=>1}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>1}, "Neuroscience"=>{"Neuroscience"=>1}, "Physics and Astronomy"=>{"Physics and Astronomy"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>36}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>1}, "Unspecified"=>{"Unspecified"=>10}, "Environmental Science"=>{"Environmental Science"=>11}, "Arts and Humanities"=>{"Arts and Humanities"=>1}}, "reader_count_by_country"=>{"Canada"=>1, "Hungary"=>1, "United States"=>1, "Poland"=>1, "France"=>1, "Portugal"=>1}, "group_count"=>4}

Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/545262"], "description"=>"<p><b>A:</b> The proportion of prey killed was not affected by prey type (i.e. whether they were tested with low or high quality flies) (Experiment 1). The values indicated by symbols represent the average proportion (±1SE) with open circles and dotted lines corresponding to results with low quality prey and solid circles and lines representing results with high quality prey. <b>B:</b> The proportion of prey killed was influenced by whether the spider had been maintained on a low or high quality diet prior to testing (Experiment 2). The values indicated by symbols represent the average proportion (±1SE) with open circles and dotted lines corresponding to results for spiders on low quality diets prior to testing and solid circles and lines representing results for spiders on prior high quality diets. <b>C:</b> Consumption, as represented by average (±1SE) change in abdomen width of the spider, was affected by prey type (Experiment 1). Open bars indicate consumption of low quality prey and solid bars indicate consumption of high quality prey. <b>D:</b> Consumption, as represented by average (±1SE) change in abdomen width of the spider, was not influenced by the prior diet of the spider (Experiment 2). Open bars indicate consumption of spiders on prior low quality diet and solid bars indicate consumption of spiders on prior diet of high quality prey.</p>", "links"=>[], "tags"=>["prey", "killed"], "article_id"=>215763, "categories"=>["Physiology"], "users"=>["Jason M. Schmidt", "Peter Sebastian", "Shawn M. Wilder", "Ann L. Rypstra"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0049223.g001", "stats"=>{"downloads"=>1, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Effects_of_prey_type_and_predator_prior_diet_on_the_proportion_killed_and_amount_consumed_/215763", "title"=>"Effects of prey type and predator prior diet on the proportion killed and amount consumed.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-11-08 01:36:03"}
  • {"files"=>["https://ndownloader.figshare.com/files/545494"], "description"=>"<p>In experiment 3, the average preference scores (α) (and 95% confidence interval) for spiders that had been on a low quality diet were not significantly different from α = 0.50, which represents random prey selection (dashed horizontal line), whereas spiders on a high quality diet prior to testing showed negative selection for low quality flies (95% CI lies below the line) and positive selection for high quality flies (95% CI is above the line).</p>", "links"=>[], "tags"=>["spiders"], "article_id"=>215994, "categories"=>["Physiology"], "users"=>["Jason M. Schmidt", "Peter Sebastian", "Shawn M. Wilder", "Ann L. Rypstra"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0049223.g003", "stats"=>{"downloads"=>1, "page_views"=>2, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Prey_type_selected_by_spiders_that_were_provided_either_a_low_or_high_quality_diet_/215994", "title"=>"Prey type selected by spiders that were provided either a low or high quality diet.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-11-08 01:39:54"}
  • {"files"=>["https://ndownloader.figshare.com/files/545434"], "description"=>"<p>Estimates of functional response parameters: handling times (<b>A</b>) and attack constants (<b>B</b>). In experiment 1, there were no differences in <b>A:</b> handling time (df = 1,96, t = 0.51, P = 0.61) or <b>B:</b> attack constant (df = 1, 96, t = 0.03, P = 0.82) between spiders foraging on low or high quality prey. In experiment 2, there were no differences in <b>A:</b> handling time (df = 1,98, t = 0.43, P = 0.67) or <b>B:</b> attack constants (df = 1, 98, t = 01.18, P = 0.24) for spiders with contrasting dietary histories. Bars indicate averages with 95% CI. Open bars are used for low quality prey type or diet and shaded bars are used for high quality prey type or prior diet.</p>", "links"=>[], "tags"=>["physiology"], "article_id"=>215942, "categories"=>["Physiology"], "users"=>["Jason M. Schmidt", "Peter Sebastian", "Shawn M. Wilder", "Ann L. Rypstra"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0049223.g002", "stats"=>{"downloads"=>0, "page_views"=>2, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Figure_2_/215942", "title"=>"Figure 2", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-11-08 01:39:02"}
  • {"files"=>["https://ndownloader.figshare.com/files/545585"], "description"=>"<p>Estimates of coefficients and standard error (SE) are presented for initial prey abundance, <i>N<sub>o</sub></i>, <i>N<sub>o</sub><sup>2</sup></i>, and prey treatments.</p>", "links"=>[], "tags"=>["logistic", "regression", "differences", "prey", "spider"], "article_id"=>216080, "categories"=>["Physiology"], "users"=>["Jason M. Schmidt", "Peter Sebastian", "Shawn M. Wilder", "Ann L. Rypstra"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0049223.t002", "stats"=>{"downloads"=>0, "page_views"=>2, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Results_of_logistic_regression_used_to_determine_the_type_of_functional_response_for_each_experiment_and_to_test_for_differences_between_either_prey_type_or_spider_prior_diet_/216080", "title"=>"Results of logistic regression used to determine the type of functional response for each experiment and to test for differences between either prey type or spider prior diet.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-11-08 01:41:20"}
  • {"files"=>["https://ndownloader.figshare.com/files/545546"], "description"=>"<p>Symbols indicate:</p>'<p><i>F<sub>1,56</sub></i>;</p>*<p><i>F<sub>1,36</sub></i> and</p>∧<p><i>F<sub>1,24</sub></i>.</p>", "links"=>[], "tags"=>["anovas", "comparing", "flies", "supplemented"], "article_id"=>216043, "categories"=>["Physiology"], "users"=>["Jason M. Schmidt", "Peter Sebastian", "Shawn M. Wilder", "Ann L. Rypstra"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0049223.t001", "stats"=>{"downloads"=>1, "page_views"=>3, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Average_SE_nutrient_content_and_results_of_ANOVAs_comparing_of_the_low_quality_fruit_flies_reared_on_the_standard_Drosophila_media_and_high_quality_flies_reared_on_media_supplemented_with_dog_food_media_/216043", "title"=>"Average (± SE) nutrient content and results of ANOVAs comparing of the low quality fruit flies (reared on the standard <i>Drosophila</i> media) and high quality flies (reared on media supplemented with dog food media).", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-11-08 01:40:43"}
  • {"files"=>["https://ndownloader.figshare.com/files/545617"], "description"=>"<p>Results from ANOVA used to determine the effect of prey type or spider prior diet on prey consumption, as measured by the change in abdomen width of <i>Pardosa milvina</i> during the course of the experiment.</p>", "links"=>[], "tags"=>["anova", "prey", "spider", "abdomen", "width"], "article_id"=>216106, "categories"=>["Physiology"], "users"=>["Jason M. Schmidt", "Peter Sebastian", "Shawn M. Wilder", "Ann L. Rypstra"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0049223.t003", "stats"=>{"downloads"=>1, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Results_from_ANOVA_used_to_determine_the_effect_of_prey_type_or_spider_prior_diet_on_prey_consumption_as_measured_by_the_change_in_abdomen_width_of_Pardosa_milvina_during_the_course_of_the_experiment_/216106", "title"=>"Results from ANOVA used to determine the effect of prey type or spider prior diet on prey consumption, as measured by the change in abdomen width of <i>Pardosa milvina</i> during the course of the experiment.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-11-08 01:41:46"}
  • {"files"=>["https://ndownloader.figshare.com/files/293194", "https://ndownloader.figshare.com/files/293204"], "description"=>"<div><p>While foraging theory predicts that predatory responses should be determined by the energy content and size of prey, it is becoming increasingly clear that carnivores regulate their intake of specific nutrients. We tested the hypothesis that prey nutrient composition and predator nutritional history affects foraging intensity, consumption, and prey selection by the wolf spider, <em>Pardosa milvina</em>. By altering the rearing environment for fruit flies, <em>Drosophila melanogaster</em>, we produced high quality flies containing more nitrogen and protein and less lipid than low quality fruit flies. In one experiment, we quantified the proportion of flies taken and consumption across a range of densities of either high or low quality flies and, in a second experiment, we determined the prey capture and consumption of spiders that had been maintained on contrasting diets prior to testing. In both cases, the proportion of prey captured declined with increasing prey density, which characterizes the Type II functional response that is typical of wolf spiders. Spiders with similar nutritional histories killed similar numbers of each prey type but consumed more of the low quality prey. Spiders provided high quality prey in the weeks prior to testing killed more prey than those on the low quality diet but there was no effect of prior diet on consumption. In the third experiment, spiders were maintained on contrasting diets for three weeks and then allowed to select from a mixture of high and low quality prey. Interestingly, feeding history affected prey preferences: spiders that had been on a low quality diet showed no preference but those on the high quality diet selected high quality flies from the mixture. Our results suggest that, even when prey size and species identity are controlled, the nutritional experience of the predator as well as the specific content of the prey shapes predator-prey interactions.</p> </div>", "links"=>[], "tags"=>["nutritional", "prey", "affects", "foraging", "generalist", "arthropod", "predator"], "article_id"=>117715, "categories"=>["Physiology"], "users"=>["Jason M. Schmidt", "Peter Sebastian", "Shawn M. Wilder", "Ann L. Rypstra"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0049223.s001", "https://dx.doi.org/10.1371/journal.pone.0049223.s002"], "stats"=>{"downloads"=>4, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/The_Nutritional_Content_of_Prey_Affects_the_Foraging_of_a_Generalist_Arthropod_Predator__/117715", "title"=>"The Nutritional Content of Prey Affects the Foraging of a Generalist Arthropod Predator", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2012-11-08 02:08:35"}

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Relative Metric

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