Noor Rahman


  • Missing observations are not zeroes

    Missing observations are not zeroes

    A failed recorder, a masked call, and zero detections are different findings. How effort, flags, and honest gaps protect an observation record.

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  • Counting the seals you cannot see

    Counting the seals you cannot see

    Aerial counts miss seals in water and snow lairs. Haul-out research shows how availability, visibility, survey conditions, and sampling determine what a population estimate can mean.

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  • A quiet recording is not an empty sea

    A quiet recording is not an empty sea

    Recording schedules, changing noise, call rates, and detector thresholds shape acoustic non-detections. A worked comparison shows why silence is not a census of absence.

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  • Listening for narwhals in Baffin Bay

    Listening for narwhals in Baffin Bay

    What a hydrophone can record about narwhal calls, vessel noise, and uncertainty in a changing soundscape.

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