04.03.2013
(Monday).
My clock rings at 05:00. Fortunately, I hear it this time. As
previous days, not cold outside at the end of the night. The dredge is put in
the water at 06:06. Not much sediment in it (black sand) when it comes back.
Moderate number of amphipods. The Agassiz trawl follows immediately and the
sorting of the dredge is not yet finished when it comes up. Marie goes on deck
and I finish the sorting. I missed something interesting: the trawl caught more
than 40 huge Paraceradocus gibber,
which were crawling in the mud. Still early in the morning (09:10), the trap
system are released from the sea floor. It comes up without problems. Since it
is still fairly dark, the flash system did work. I made a short video of that.
The new flagpole survived its mission in the abysses but this time we lost the
flag itself! The yellow flag, with the little iguanodon (the logo of our
museum) sketched with a pen... One of the six traps is broken. Technically, the
trap model conceived by Henri Robert is wonderful and extremely practical but
since they are in rigid plastic, they are also fragile. I don't know if we will
use the traps a third time during this cruise; it will depends on our tough
time schedule and on the weather conditions in the Drake Passage. Once back in
the lab, we first look at the samples of the trawl, and especially the Paraceradocus gibber. Their colour pattern
is all clearly different from that of the deep Paraceradocus of the previous days, with almost no variation. This
confirms our feeling of yesterday that two species are currently confused under
the name Paraceradocus gibber: a
shallow-water brown and white one and a
deep-water all livid brown one. It appears that the issue of the transport of
the biological material back to Belgium is not yet solved as I believed. Just after lunch, we sort the material of the
trap. Not so many specimens but again a good diversity. One species not found
the first time (Pseudorchomene coatsi)
and two no longer found (Parschisturella
carinata and Orchomenella pinguides).
In the afternoon, the waves increase in strength. We have the luck to see twice
humpback whales fairly close to the ship. Marie is so happy to see them...
(Cédric)
Paraceradocus gibber sensu stricto, lateral view. Total body length about 90 mm.
Paraceradocus gibber sensu stricto, dorsal view. Total body length about 90 mm.
Trap system coming up.
Trap system on surface.
Trap system back on board.
The traps.
The traps has come up (videos).
Pseudorchomene coatsi, total length about 12 mm.
Humpback whale.