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Predation is an important selective force for prey organisms, who have also developed different antipredator adaptions. Individuals of many animal species live in groups, which is generally believed to benefit prey through reduced predation risk and\/or increased foraging efficiency, etc. Different antipredator mechanisms of grouping prey have been well-developed theoretically and studied extensively for single species groups as compared to mixed-species groups. Yet, there has been a lack of understanding of how some antipredator mechanism (e.g., encounter-dilution effect) would be affected when applied to a mixed-species group due to additional effect of the within-group heterogeneity of prey. In this talk, I will introduce my exploratory study on the topic of the consequence of mixed-species grouping on the risk related to group detection and\/or predation risk. This project intended to expand current understanding of the antipredator mechanisms for heterogeneous prey groups of multi-species or more broadly multi-phenotypes. Using artificial prey (suet pellets) to simulate prey groups, the first three studies empirically examined how the prey group as a whole\u2014varies in prey composition, group size, within-group position and compactness\u2014would affect the ease of detection by free-living animals and \u2018human predators\u2019. Then, I used images of a polymorphic species of insect prey (Tetris subulata) to simulate their camouflaged occurrence with varied compactness of inter-individual distribution in their natural background. \u2018Human predators\u2019 were recruited for prey hunting on the computer screen to explore the effect of within-group polymorphism and compactness on predations risk. The last study investigated grouping effects, especially the effect of the nearest associated species on (coal tit Periparus ater) individual\u2019s vigilance and foraging in the aggregation of avian species feeding on the feeder. Significant effects of group patterns on the detection risk of artificial prey groups were mostly found in experiments with \u2018human predators\u2019 rather than animal predators. Despite some contradictory findings between different predator-prey systems, these studies generally lent support to the idea consistent with the \u2018giveaway cue\u2019 hypothesis, where polymorphic population with prey of conspicuous morph may attract predators\u2019 attention; and showed that the inclusion of conspicuous prey in mixed-species group would increase the detection risk of prey compared to some single species groups. Together, all the studies demonstrated the influence of mixed-species association on prey detection and\/or predation risk.<\/p>\n\n\n\n
Speaker:<\/strong> Dr. Hao Gu<\/p>\n Affiliation: <\/strong>XTBG<\/p>\n Time:<\/strong> 4:30 PM, Tuesday, Sep. 6, 2022<\/p>\n Venue: <\/strong>ZOOM \u4f1a\u8bae\u5e73\u53f0 \u4f1a\u8bae ID\uff1a312 430 8960 \u4f1a\u8bae\u5bc6\u7801 PWD\uff1a666666\u00a0<\/p>\n \u89c6\u9891\u4e0b\u8f7dDownload Link\u94fe\u63a5: https:\/\/pan.baidu.com\/s\/1PUvXhQG88Wy3AXLmPXRg2w\u00a0 \u00a0Pwd\u63d0\u53d6\u7801: darj<\/p>\n ZOOM <\/p>\n","protected":false},"excerpt":{"rendered":" Speaker: Dr. Hao Gu
\u4f1a\u8bae ID\uff1a312 430 8960
\u4f1a\u8bae\u5bc6\u7801 PWD\uff1a666666
\u56fd\u5185\u7528\u6237\u4e0b\u8f7d\u5730\u5740Download address for domestic users\uff1ahttps:\/\/zhumu.com\/download
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\nAffiliation: XTBG
\nTime: 4:30 PM, Tuesday, Sep. 6, 2022<\/p>\n","protected":false},"author":2,"featured_media":3066,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"_links":{"self":[{"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/posts\/3065"}],"collection":[{"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3065"}],"version-history":[{"count":1,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/posts\/3065\/revisions"}],"predecessor-version":[{"id":3067,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/posts\/3065\/revisions\/3067"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/media\/3066"}],"wp:attachment":[{"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3065"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3065"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3065"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}