Practice Test Geeks(CFP) Certified Fisheries Professional Practice Test
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Aquatic Species Monitoring Flashcards

7 cards from real CFP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Aquatic Species Monitoring flashcards as text

  1. Which sampling gear is most appropriate for monitoring benthic macroinvertebrates in a riffle habitat?

    Answer: Surber sampler

    Surber samplers enclose a defined area of stream bottom and collect drift, making them ideal for benthic macroinvertebrate sampling in riffles.

  2. In mark-recapture studies, the Lincoln-Petersen estimator assumes which of the following?

    Answer: Marked individuals mix randomly with the population

    A core assumption of the Lincoln-Petersen method is that marked fish mix randomly with unmarked fish before the recapture event.

  3. Passive integrated transponder (PIT) tags are preferred over anchor tags for long-term individual identification primarily because they:

    Answer: Are readable without recapturing the fish

    PIT tags can be detected by antennae at fish passages or with handheld readers without physically recapturing the animal.

  4. A crew electrofishing a warm-water stream sets the output to 60 Hz pulsed DC. What is the primary purpose of using pulsed rather than continuous DC?

    Answer: Reduce injury to fish while maintaining galvanotaxis

    Pulsed DC induces galvanotaxis while reducing the duration of electrical exposure, lowering fish mortality and injury compared with continuous DC.

  5. Which index is most commonly used to assess fish community integrity relative to reference conditions in wadeable streams?

    Answer: Index of Biotic Integrity (IBI)

    The IBI scores multiple fish community metrics against reference-site benchmarks to evaluate overall biological condition.

  6. When conducting hydroacoustic surveys to estimate fish abundance, the target strength (TS) of an individual fish is primarily related to:

    Answer: Swim bladder size and fish length

    Target strength is chiefly determined by the volume and angle of the swim bladder, which scales with fish length.

  7. A rotenone removal toxicant study is conducted to enumerate a lake fish population. After collection, which step is critical before interpreting density estimates?

    Answer: Correcting for incomplete fish recovery based on depth and habitat

    Rotenone efficiency varies with water depth and habitat complexity, so estimates must account for fish that sink or were not retrieved.