Measuring Crayfish Habitat Use and Selection
Author(s): Cheyanne Olson
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Olson_Crayfish Habitat Assessment_V2.docx(DOCX | 224 KB)
Olson_Crayfish Data Sheet and Analyses.xlsx(XLSX | 19 KB)- Olson_Crayfish_Student Worksheet.docx(DOCX | 26 KB)
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Description
This resource provides an in-depth field-based lesson plan designed for upper-level undergraduate students studying aquatic biology, environmental science, or conservation. It focuses on the relationship between crayfish populations and stream habitat quality, exploring how various environmental factors (such as water quality, substrate type, vegetation, and human activity) influence crayfish distribution, size, and overall health. Through direct field observations and sampling, students collect data on habitat characteristics and crayfish populations to investigate habitat preferences.
The lesson encourages hands-on learning, where students work in groups to gather habitat data (e.g., water temperature, stream depth, substrate types) and crayfish data (species identification, body measurements, and weight). By analyzing this data, students will form hypotheses, draw conclusions, and reflect on the impact of habitat changes on crayfish communities. An optional Excel template aids in data analysis and prediction formulation.
Target Audience: Designed for upper undergraduate students with some background in aquatic systems, this lesson is ideal for courses in environmental science, limnology, aquatic biology, and conservation biology. It is adaptable for a wide range of students, considering accessibility and the availability of appropriate field sites and equipment.
Learning Outcomes:
- Formulate and test hypotheses about the relationship between habitat features and crayfish populations.
- Collect and analyze field data on water quality, substrate, vegetation, and crayfish populations.
- Apply scientific methods for crayfish species identification, measurement, and population assessment.
- Reflect on the influence of habitat characteristics on crayfish distribution and draw evidence-based conclusions.
Key Components:
- Field-based crayfish sampling
- Water quality and habitat data collection
- Species identification and crayfish measurements
- Data analysis and hypothesis testing
- Group discussions and reflections
This resource is a practical tool for instructors aiming to engage students in real-world ecological research while fostering critical thinking, data analysis skills, and a deeper understanding of how aquatic ecosystems function.
Cite this work
Researchers should cite this work as follows:
- Olson, C. (2024). Measuring Crayfish Habitat Use and Selection. River Field Studies Network, QUBES Educational Resources. doi:10.25334/2DZQ-7Y69