Photos
and videos:
Sampling
deep
dwelling Glass Sponges with the
ROPOS submersible
.
Barkley
Sound,
British
Columbia, Canada,
140 m
deep July 2004
(an HTML document with photos and text)
Glass
Sponge
pumping visualized with
fluorescein injection by the ROPOS submersible
Fraser
Ridge
reef, British Columbia,
Canada,
150 m
deep, Nov 2004
(Video clip, needs a DivX codec)
Sampling the water
inhaled
and exhaled by a glass sponge at 150 m depth
using the SIP
sampler
Barkley
Sound, British Columbia,
Canada, 150 m
deep, Nov 2004
(¹
~ 5.5 MB
)
Highlights
from SCUBA InEx
sampling (Quick Time
video)
Race Rocks, British
Columbia, Canada.
The sampled sponge is Isodictya rigida.
Video courtesy of G. Fletcher and the students
of Pearson
College,
www.racerocks.com.
Sponge
pumping
(Quick Time video)
An example of the complex hydrodynamics that characterize
the excurrent jet of many sponges. The photographed species is
Theonella swinhoei, sampled in
front of the Steinitz Marine Laboratory
in
Eilat. Video courtesy of Dr. N. Shassar.
Dye
Front Speed (pumping rate)
measurement. (Quick Time video)
The photographed organism is the reef sponge Theonella
swinhoei,
sampled in front of the Steinitz Marine Laboratory in Eilat.
Note that the release of the dye is carried by sliding the clogging
finger
laterally so that no artificial suction is created.
Video courtesy of Dr. N. Shassar
In
situ pumping rate measurements (Quick
Time
video)
A reef sponge Theonella
swinhoei was instrumented with a
pair of
Acoustic Doppler Velocimeters (ADV)
for simultaneous measurement of pumping rate, ambient current,
and particulate flux. An infra red sensitive video camera
and a strong IR light source allowed visual
monitoring of environmental cues that affect the sponge pumping behavior
