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Lecture

BIOL*1070 Lecture 2.pdf

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Department
Biology
Course
BIOL 1070
Professor
T.Ryan Gregory
Semester
Winter

Description
How are freshwater mussels being affected?▯ Reproductivity ▯ ▯ Zebra mussel larvae are not parasitic; they float around freely in the water and do not sit on a ▯sh’s gills.▯ Zebra mussels don’t have to find a host → reproduce faster → outnumber freshwater mussels▯ ∴ Compete better▯ ▯ ▯ttach ability▯ Zebra mussels attach everywhere i.e. rocks, docks. Also attach to native mussels, block their siphons. Native mussels don’t attach to anything. ▯ ▯ ▯verfishing▯ Fish act as host for freshwater mussels. No host = limited reproductivity. ▯ ▯ Also affected by changes in environment due to agricultural processes. ▯ ▯ What are the traits of native mussels and zebra mussels?▯ ▯ Zebra mussels are much smaller.▯ Phylogenetic differences; zebra mussels are more similar to marine species.▯ ▯ Zebra mussels have attach ability.▯ ▯ ▯igger size = less of them, smaller size = more of them. Inverse relationship. ▯ What is a trait?▯ ▯ Atrait is something that differentiates one species from another.
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