[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-594984-105":59,"doc-detail-594984-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","the-influence-of-habitat-complexity-on-crayfish-foraging-behavior","The Influence of Habitat Complexity on Crayfish Foraging Behavior","","An inquiry-based classroom research activity examines how habitat complexity shapes crayfish foraging behavior. The article motivates student projects as alternatives to field or vertebrate studies, where live-animal research is logistically difficult and often requires IACUC approval and additional training. Crayfish are proposed because they are easy to obtain and maintain, show low mortality, and display observable behavior over weeks. 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Darling  \nDepartment of Biology  \n577 Western Avenue  \nWestfield State College  \nWestfield, MA 01086  \nEmail: [RDarling@westfield.ma.edu](RDarling@westfield.ma.edu)  \nAbstract  \nI teach an animal behavior course where students conduct independent research projects; however, using live animals for research is challenging at a small university. Often, students choose to conduct a laboratory project over a field project believing that it will be easier to observe animals and control variables, but it can be difficult and expensive to acquire and maintain animals. If students work with vertebrates, there are added complications such as obtaining Institutional Animal Care and Use Committee (IACUC) approval and training. Additionally, following IACUC regulations often involves resources that we do not have. Because of these complications, I suggest to students that they consider an invertebrate species for their projects. In particular, crayfish are a species that are easy to obtain and care for, have low mortality, and exhibit interesting behavior that can be observed over several weeks. This article describes an inquiry-based research activity examining the influence of habitat complexity on crayfish foraging. This activity is well suited for students in ecology, animal behavior, or invertebrate biology classes and gives students flexibility in the hypothesis they test and the methods they use, while providing a framework that lets them successfully complete a behavior project.  \nKeywords: Habitat complexity, habitat structure, animal behavior, crayfish, aggression, foraging behavior,  invertebrate biology   \nIntroduction to Habitat Complexity and Crayfish Behavior  \nCrayfish are freshwater crustaceans that live in a variety of shallow habitats (streams, lakes, marshes, and swamps) . They are opportunistic omnivores, and their diet includes macrophytes, algae, detritus, invertebrates, and small fish. Crayfish can be quite aggressive toward each other and will chase, push, and grab at one another (Baird et al. 2006) . Crayfish generally live in structurally complex habitats such as rocky areas of rivers, and vegetated littoral zones of lakes. Habitat complexity refers to the physical structure of the environment. For example, the littoral zone of a lake is generally more structurally complex than the open water limnetic zone. Often, in the littoral zone, there are rocks, woody debris, and rooted plants of a variety of shapes and sizes.  \nPrevious research has shown that habitat complexity can influence prey density, interactions between predators and prey, and foraging rates of predators (Savino and Stein 1982, 1989, Gotceitasand Colgan 1987, 1989, Diehl 1988, Gotceitas 1990,  \nNystrom and Perez 1998) . Previous studies where stem density has been manipulated have found that an increase in habitat complexity generally results ina decrease in foraging rate due to physical interference making it difficult for predators to find prey (Savino and Stein 1982, 1989, Gotceitas and Colgan 1987, 1989, Diehl 1988, Gotceitas 1990) . Some studies have found that foraging gains are maximizedat intermediate levels of structural complexity (Crowder and Cooper 1979, 1982) due to the interaction between the effects of dense vegetation on prey density, maneuverability and visibility. However, habitat complexity can also influence interactions between foragers. Studies examining the influence of habitat complexity among foragers that are aggressive toward one another have found that as habitat complexity increases, the aggressive interactions between foragers decrease, resulting in the amount eaten per forager increasing (Basquill and Grant 1998, Corkum and Cronin 2004) .  \nGeneral Methods  \nFormat of Research Projects  \nI prefer to have students pick their own hypothesis and develop their own methods, rather than telling them what to do as it provides stude","cbCaiiM2b4v8ExYW","https://ap.wps.com/l/cbCaiiM2b4v8ExYW","pdf",415772,"English","# Abstract\n# Introduction to Habitat Complexity and Crayfish Behavior\n## Habitat complexity definition and crayfish habitat\n## Prior research on foraging and aggressive interactions\n# General Methods\n## Format of Research Projects","[{\"question\":\"Why does the article recommend using crayfish for student research projects?\",\"answer\":\"Crayfish are easy to obtain and care for, have low mortality, and exhibit interesting behavior that can be observed over several weeks.\"},{\"question\":\"What is habitat complexity in this activity?\",\"answer\":\"Habitat complexity refers to the physical structure of the environment, such as how structurally complex the littoral zone is compared with open water.\"},{\"question\":\"How are student research projects structured in the proposed method?\",\"answer\":\"Students begin with background material, conduct a literature search, write a summary, propose a hypothesis, design an experiment, and submit a formal research proposal with methods and a weekly calendar.\"}]","The Influence of Habitat Complexity on Crayfish Foraging Behavior | PDF",1792080220,13]