. . . 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 9: Surfacing Angle
This section includes fields that describe the angle at which the animal(s) return to the surface. Note that this section refers to the ascent phase of a dive; the previous section (Dive Angle) corresponds to the descent phase of the dive.

Fields:

  • Minimum Surfacing Angle
    SA_MinSurfacingAngle(deg):
    The minimum angle at which the animal(s) ascend (degrees).

  • Maximum Surfacing Angle
    SA_MaxSurfacingAngle(deg):
    The maximum angle at which the animal(s) ascend (degrees).

  • Mean Surfacing Angle
    SA_MeanSurfacingAngle(deg):
    The mean or average angle at which the animal(s) ascend (degrees).

  • Median Surfacing Angle
    SA_MedianSurfacingAngle(deg):
    The middle value in the distribution of the surfacing angles (degrees). If there is an even number of surfacing angle values, it is the average of the two middle values.

  • Mode Surfacing Angle
    SA_ModeSurfacingAngle(deg):
    The most common surfacing angle value; in the frequency distribution, the surfacing angle with the greatest number of frequencies (degrees).

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

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

  • Surfacing Angle Standard Deviation
    SA_SurfacingAngleStdDev:
    To express the degree of dispersion in the surfacing angle data, the standard deviation (square root of the variance) should be entered (degrees).

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