Saturday, February 27, 2010
Food!
Saturday, February 20, 2010
Hiking
Friday, February 19, 2010
Kanazawa-hakkei
Saturday, February 13, 2010
Yokohama
Sunday, February 7, 2010
Kamakura
Saturday, February 6, 2010
Miura-Kaigan beach
Friday, February 5, 2010
Last dive
Well, no farewell drink for us, as everyone was busy working till past midnight. The engineers needed to fix the zoom and focus again after the tests they did, and the PICASSO scientists had a meeting about what to improve and what they could do next. They are planning to keep tinkering on PICASSO till they get a system that works well, then rebuild it completely from scratch so that it will work better.
For the last dive PICASSO gave us it’s best show yet : impeccable steering the whole time, great shots of midwater jellyfish and ctenophores with zoom and focus and everything, and nice shots of the benthos with some good sea anemones and possibly a new ctenophore species. We will even be studying that video as it’s so good. And it looks like everyone on board could feel it was a sucess : without asking anyone the captain of the ship stopped the winch and turned the boat completely around so that the PICASSO would be suspended in front of Mt Fuji. A very good show, recorded for TV and on the cameras of about half the crew. I will be adding better photos later, as I was using Dhugal’s camera at the time.
While they were diving I was busy feeding my jellyfish (the fish won’t eat) and packing up the lab. It says in the book that Liriope are voraceous feeders and it certainly likes everything I’ve given it. I also left it with 2 copepods and a piece of something so that it won’t get too hungry during the week-end. I also had the video of the dive in real-time on the big TV in the lab so that was fun.
Because of the wind we couldn’t disembark at Ito port as planned so they decided to go to JAMSTEC and dock there. We got to take the fish and jellyfish and the frozen siphonophore off that way and put them away safely. We also took the microscope off so we will be able to start looking at stuff on Monday. It will also make it easier to feed my jellyfish. It does seem to be growing, but it’s still not much over 1mm wide. I can’t wait to see what it’ll look like on Monday (I do hope it will still be alive!).
It as fun seeing the ship steam up to JAMSTEC. About half the people are staying on for the last leg of the trip with the MR-X1 but thy were planning to go have a run around the town a bit first. The engineer who helped design PICASSO had even gotter dressed up in black pants with a fancy white shirt. Everyone’s plans for the evening were different but they all included a non-fish dinner. I wonder why.... As the ship was so big I didn’t have too much problems walking on land. Just a bit at first standing on the dock, looking at the immobile ship and seeing the dock slowly go up and down....
Back at home now, wading through all the unread e-mails and waiting till the wash finishes. It was a super duper cruise, and it’s really hard to beleive that I was still in France just 2 weeks ago. This week-end is for resting, but it may include a small trip down to the end of the train line to the beach, just to get it out of my system. I am planning on eating pasta a lot next week too, as I’ve been missing it. They did serve italian style pasta a bit on the boat, but 3 spaghettis in tomato sauce at 7am doesn’t really count...
Off to get myself some clean clothes now. It’s only when you get off the boat that you realise they really smell! The people on the JAMSTEC shuttle bus last night must have thought I’d fallen in a gasoline pit....
Midwater survey
Thursday 4th of February : first midwater survey for the AUV PICASSO. A few technical issues still : the camera doesn’t focus worth beans and there was a crimp in the fiber-optics cable so the communication with the vehicle came and went. Another biggish problem was that there was absolutely NOTHING in the midwater zone. Not even siphonophores, which had been relatively abundant in the other dives. During an hour and a half of dive we saw 1 siphonophore that we were unable to focus on and lots of puffs of squid ink from a squid that was off camera, during a period where we had lost contact and so couldn’t move. We did get to see a lot of marine snow though....
In the afternoon we did 2 plankton nets, one at 300 and one at 400, but they contained the same things as the surface ones. We did find a juvenile jellyfish which we think might be a stage 1 of Liriope tetraphylla, develloping into a stage 2. As it’s really not like any of the other jellyfish in the books we’ve decided to keep it and see if we can get it to devellop into an adult. I fed it a bit of detritus half it’s size (it’s only about 1mm across) and it gobbled it right up. It had nearly finished digesting it an hour later. That is more than can be said of the porcupine fish, who seems positively terrified of the clam bit we gave him and spt out the fish bit we offered him. He must not be starving yet.
Last day for us tomorrow. There will be a PICASSO dive in the morning, aroung 500m and down to the seafloor if there’s nothing in midwater. We will also have to pack the lab up and move out of the container so the MR-X1 robot team can move in and start diving on Saturday. We will be leaving all the equipment on board as the ship will be arriving at JAMSTEC on the 9th. We will need to take the fish and the jellyfish though. I will leave the boots and water clothes on board so have extra space in my luggage.
I will add the dive photos later, as I took them on Dhugal's camera.
Success!
The 2 dives were a great success, the first real sea-floor surveys made with PICASSO since it started functioning, about 2 years ago. Even the second dive went well, even though the fiber-optics cable didn’t unroll as it should have done. Luckily they have 2 coils, one inside PICASSO and the other on the ship. That problem has already been solved before tomorrow’s dive. I have gotten the hang of the pre-dive checks now. As it’s technically only the biologists doing the dives we are kind of lacking people and so I helped out screwing the tops on and such to go faster. We would like the pre-dive check to go from an hour and a half to less than an hour.
The driving of PICASSO is very tiring, but Dhugal is getting very good at it, and never even touched the bottom on the second dive. They have also gotten the hang of the camera’s zoom and focus, and got some good footage of sea anemones, some siphonophore bells, some shrimp and fish and the billions of star fish (brittle stars?) that live on the sea-floor. We don’t reall know why there are so many, but there is lots of detritus in the bay, and they may be able to catch small preys from the water. We have not had the opportunity to look closely at the videos, as the engineers are still fiddling around with stuff in the container. Hopefully tomorrow we can go through some. We only have a dive in the morning, and then the laser group takes over in the afternoon.
At the end of the second dive I had time to do a small surface plankton net, to keep myself busy. There were lots of jellyfish this time. Mostly siphonophore bells, but also some Obelia medusae. And lots of small fish larvae, either sardines or anchovy. We had a go looking at them under polarized light and it’s amazing what the muscle bands look like. Jellyfish are, of course, completely invisible. But it was still fun playing around with.
Also in the lab is a porcupine fish that the people on the small boat brought back when they went to take James Reimer to the port. It’s not looking great, and we don’t really have anything to feed it, but we’ll try and keep it happy enough untill we get back to JAMSTEC. We gave it fresh water today and it seemed to be happy enough.
A restful night for everyone, as it was an eventful day.