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Avian Reproduction & Breeding Flashcards

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

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  1. What is the primary environmental cue that triggers the hormonal cascade initiating reproductive behavior in most bird species?

    Answer: Changes in photoperiod (day length)

    Photoperiod (day length) is the primary environmental cue detected by the hypothalamic-pituitary-gonadal axis to initiate reproductive activity in most birds.

  2. What relative humidity level is generally recommended during the first two-thirds of incubation for most parrot eggs?

    Answer: 40–50%

    A relative humidity of approximately 40–50% is recommended during most of incubation to allow for the correct rate of moisture loss from the egg.

  3. The technique of 'double clutching' in avian breeding refers to:

    Answer: Removing the first clutch to stimulate the hen to produce a second clutch

    Double clutching involves removing the first clutch for artificial incubation, which stimulates the hen to produce a second clutch and effectively doubles annual egg production.

  4. How frequently should eggs be turned during artificial incubation to support proper embryonic development?

    Answer: At least 3–5 times per day

    Eggs should be turned at least 3–5 times daily (ideally every 1–2 hours) to prevent embryo adhesion to shell membranes and ensure even heat distribution.

  5. What does the term 'lockdown' refer to during the artificial incubation process?

    Answer: Stopping egg turning and raising humidity for the final hatch period

    Lockdown refers to the final 2–3 days before hatch when egg turning stops and humidity is increased to facilitate the chick's internal and external pip.

  6. In hand-rearing chicks, at what point should feeding stop to avoid crop stasis or aspiration?

    Answer: When the crop is visibly full and slightly firm

    Feeding should stop when the crop is visibly full and slightly firm; overfilling can lead to crop stasis, regurgitation, or aspiration pneumonia.

  7. Imprinting in hand-raised birds primarily affects which of the following?

    Answer: The bird's social identity and future bonding/breeding partners

    Imprinting causes a hand-raised bird to identify humans as its own species, which can significantly affect social bonding, mate selection, and breeding success later in life.