. . . Predicting and Minimizing Environmental Impacts . . .
 

 

Marine Wildlife Behavior Database
Metadata

Introduction

Section 7: Diving Speed

Section 1: Reference

Section 8: Dive Angle

Section 2: Identification of Subject

Section 9: Surfacing Angle

Section 3: Dive Depth

Section 10: Surface Behavior

Section 4: Dive Time

Section 11: Time At-Sea/On-Land

Section 5: Bottom Behavior

Section 12: Movement

Section 6: Vertical Rate

Literature Cited

 

Section 6: Vertical Rate
This section includes fields that describe the rate of travel (change in depth over change in time) in the vertical plane during the ascent and descent portions of a dive. The vertical rate is equivalent to the ascent (surfacing) or descent (diving) rate, and may also be referred to as the vertical speed or the vertical velocity (Houser, 2006; Johnson and Tyack, 2003).

Fields:

  • Minimum Ascent Rate
    VR_MinAscentRate(m/s):
    The minimum ascent rate, change in depth divided by change in time (meters/second).

  • Maximum Ascent Rate
    VR_MaxAscentRate(m/s):
      The maximum ascent rate, change in depth divided by change in time (meters/second).

  • Mean Ascent Rate
    VR_MeanAscentRate(m/s):
    The mean or average ascent rate, change in depth divided by change in time (meters/second).

  • Median Ascent Rate
    VR_MedianAscentRate(m/s):
    The middle value in the distribution of the ascent rate, change in depth divided by change in time (meters/second). If there is an even number of ascent rate values, it is the average of the two middle values.

  • Mode Ascent Rate
    VR_ModeAscentRate(m/s):
    The most common ascent rate value; in the frequency distribution, the ascent rate with the greatest number of frequencies (meters/second).

  • Ascent Rate Standard Deviation
    VR_AscentRateStdDev:
    To express the degree of dispersion in the ascent rate data, the standard deviation (square root of the variance) should be entered (meters/second).

  • Gamma Distribution Alpha
    VR_AscentGammaDistAlpha:
    The shape parameter of the gamma distribution of ascent rates, determined by submitting data and fitting the raw data in a statistical package.

  • Gamma Distribution Beta
    VR_AscentGammaDistBeta:
    The rate parameter, equal to 1/Θ (the scale parameter), of the gamma distribution of ascent rates, determined by submitting data and fitting the raw data in a statistical package.

  • Minimum Descent Rate
    VR_MinDescentRate(m/s):
    The minimum descent rate, change in depth divided by change in time (meters/second).

  • Maximum Descent Rate
    VR_MaxDescentRate(m/s):
    The maximum descent rate, change in depth divided by change in time (meters/second).

  • Mean Descent Rate
    VR_MeanDescentRate(m/s):
    The mean or average descent rate, change in depth divided by change in time (meters/second).

  • Median Descent Rate
    VR_MedianDescentRate(m/s):
    The middle value in the distribution of the descent rate, change in depth divided by change in time (meters/second). If there is an even number of descent rate values, it is the average of the two middle values.

  • Mode Descent Rate
    VR_ModeDescentRate(m/s):
    The most common descent rate value; in the frequency distribution, the descent rate with the greatest number of frequencies (meters/second).

  • Descent Rate Standard Deviation
    VR_DescentRateStdDev:
    To express the degree of dispersion in the descent rate data, the standard deviation (square root of the variance) should be entered (meters/second).

  • Descent Gamma Distribution Alpha
    VR_DescentGammaDistAlpha:
    The shape parameter of the gamma distribution of descent rates, determined by submitting data and fitting the raw data in a statistical package.

  • Descent Gamma Distribution Beta
    VR_DescentGammaDistBeta:
    The rate parameter, equal to 1/Θ (the scale parameter), of the gamma distribution of descent rates, determined by submitting data and fitting the raw data in a statistical package.

  • Comments
    VR_Comments:
    Free-form field to note complications with data entry, information to review at a later date, etc.