INVERTEBRATE LOCOLYMPICS
(Analysis of digitized freeze-frame video images in Power Point)
Description: Frame-by-frame sequences of locomotion are shown for 10 different
organisms, with images for each organism assembled into a Power Point presentation.
Frames are labeled consecutively, beginning with the initial frame F0. Frame numbers are
given in the upper right of each image. Note that the time between successive frames is
always equal to 1/30 second, except in the millipede sequence which shows every fifth frame
(= 1/6 sec). Note that the sequence for each organism has a different distance scale.
[PLEASE NOTE THIS CORRECTION: The correct distance scale for the millipede sequence
is 10 mm, which is correctly shown on each digitized frames for the millipede. However, this
distance scale was incorrectly labeled as “5 cm” on the “LocOlympics” VHS videotape].
Listing of the ten Power Point presentations (one for each organisms) that contain the
digitized freeze-frame images for “Invertebrate LocOlympics”
ORGANISM
Dero
Lumbriculus
Vinegar eel
Leech
Daphnia
Ostracod
Copepod
Centipede
Millipede
Springtail
Digitized frames for each locomotion sequence
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10 F12 F13
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10 F12
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10 F12
F0
F1
F2
F3
F4
F5
F6
F7
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
F0
F1
F2
F3
F4
F5
F6
F0
F1
F2
F3
F4
F0…………………………..F5……………….………..F10………………………..F15
F0
F1
F2
F3
F4
F5
Suggestions for using the files:
1) Tracings of organisms and measurements of their motion may be made directly from a
computer monitor by using a felt-tip pen to make marks on a clear acetate sheet taped to
a monitor screen (see the detailed guide to the “Invertebrate LocOlympics” videotape).
Be certain that when each frame is viewed, its borders are in the exact same position as
all previous frames.
2) Analysis may also be made by printing each frame and taking measurements directly
from paper copies. If this is done, you may need to adjust the paper size or the paper
orientation (e.g., the landscape print orientation may be best for most printed files). Care
must be taken to ensure that inconsistencies in alignment and scaling of images are not
introduced during the print procedures.
3) If the computer speed is fast enough, successive frames in the Power Point
presentations may be viewed in rapid succession to provide a “slow motion effect” that
gives a better sense of the dynamics of each organism’s locomotor movements.