Shelley Gordon: A Day on the Back Deck, July 20, 2019

NOAA Teacher at Sea

Shelley Gordon

Aboard R/V Fulmar

July 19-27, 2019


Mission:  Applied California Current Ecosystem Studies Survey (ACCESS)

Geographic Area of Cruise:  Pacific Ocean, Northern and Central California Coast

Date:  July 20, 2019

Weather data: Wind – variable 5 knots or less, wind wave ~1’, Swell – NW 7’@ 10sec / S 1’ @ 11sec, Patchy fog


Science Log

7:39am – We are about to pass under the Golden Gate Bridge, heading west toward the Farallon Islands.  Several small fishing boats race out in a line off our port side, hulls bouncing against the waves and fishing nets flying in the wind.  I am aboard R/V Fulmar in transit toward data collection point 4E, the eastern most point along ACCESS Transect 4.  The TTG (“time to go,” or the time we expect to arrive at 4E) is estimated at 1h53’ (1 hour, 53 minutes), a figure that fluctuates as the boat changes course, speeds up, or slows down.  

This is my second day on an ACCESS research cruise.  Yesterday I got my boots wet in the data collection methods used on the back deck.  The ACCESS research project collects various types of data at specific points along transects (invisible horizontal lines in the ocean). Today we will be collecting samples at 6 different points along Transect 4.  With one day under my belt and a little better idea of what to expect, today I will aim to capture some of the action on the back deck of the boat throughout the day. 

9:41am – Almost to Station 4E. “5 minutes to station.”  This is the call across the radio from First Mate Rayon Carruthers, and also my signal to come down from the top deck and get ready for action.  I put on my rain pants, rubber boots, a float jacket, and a hard hat.  Once I have my gear on, I am ready to step onto the back deck just as the boat slows down for sample collection to commence.  At this first station, 4E, we will collect multiple samples and data.  Most of the sampling methods will be repeated multiple times through the course of the day at different locations and depths (most are described below). 

deploying hoop net
Dani Lipski and Shelley Gordon deploy the hoop net. Photo: Rachel Pound

10:53am – Station 4EX. We finished cleaning the hoop net after collecting a sample at a maximum depth of 33m.  The hoop net is a tool used to collect a sample of small living things in deep water.  This apparatus consists of an ~1m diameter metal ring that has multiple weights attached along the outside.  A 3m, tapered fine mesh net with a cod end (small plastic container with mesh vents) hangs from the hoop.  Attached to the net there is also a flow meter (to measure the amount of water that flowed through the net during the sample collection) and a depth sensor (to measure the depth profile of the tow).  To deploy the net, we used a crane and winch to hoist the hoop out over the surface of the water and drop the net down into the water. Once the net was let out 100m using the winch, we brought it back in and pulled it back up onto the boat deck.  Using a hose, we sprayed down the final 1m of the net, pushing anything clinging to the side toward the cod end.  The organisms caught in the container were collected and stored for analysis back at a lab.  On this haul the net caught a bunch of copepods (plankton) and ctenophores (jellyfish).

Kate Davis preps samples
Kate Davis fills a small bottle with deep water collected by the Niskin bottle.

11:10am – Station 4ME. Dani Lipski just deployed the messenger, a small bronze-colored weight, sending it down the metal cable to the Niskin sampling bottle.  This messenger will travel down the cable until it makes contact with a trigger, causing the two caps on the end of the Niskin bottle to close and capturing a few liters of deep water that we can then retrieve back up at the surface.  Once the water arrives on the back deck, Kate Davis will fill three small vials to take back to the lab for a project that is looking at ocean acidification.  The Niskin bottle is attached to the cable just above the CTD, a device that measures the conductivity (salinity), temperature, and depth of the water.  In this case, we sent the Niskin bottle and CTD down to a depth of 95m. 

deploying the CTD
Dani Lipski and Shelley Gordon deploy the CTD. Photo: Rachel Pound

12:16pm – Station 4M. Rachel Pound just threw a small plastic bucket tied to a rope over the side of the boat.  Using the rope, she hauls the bucket in toward the ship and up over the railing, and then dumps it out.  This process is repeated three times, and on the third throw the water that is hauled up is collected as a sample.  Some of the surface water is collected for monitoring nutrients at the ocean surface, while another sample is collected for the ocean acidification project.

surface water sample
Rachel Pound throws a plastic bucket over the side railing to collect a surface water sample.

1:36pm – Station 4W. Using a small hoop net attached to a rope, Rachel Pound collected a small sample of the phytoplankton near the surface.  She dropped the net down 30ft off the side of the boat and then towed it back up toward the boat.  She repeated this procedure 3 times and then collected the sample from the cod end.  This sample will be sent to the California Department of Public Health to be used to monitor the presence of harmful algal blooms that produce domoic acid, which can lead to paralytic shellfish poisoning.

Tucker trawl net
Shelley Gordon, Dru Devlin, Jamie Jahncke, and Kirsten Lindquist prepare the Tucker trawl net. Photo: Kate Davis

2:54pm – The final sample collection of the day is underway.  Jaime Jahncke just deployed the first messenger on the Tucker trawl net.  This apparatus consists of three different nets.  These nets are similar to the hoop net, with fine mesh and cod ends to collect small organisms in the water.  The first net was open to collect a sample while the net descended toward ocean floor.  The messenger was sent down to trigger the device to close the first net and open a second net.  The second net was towed at a depth between 175-225m for ~10 minutes.  After the deep tow, a second messenger will be sent down the cable to close the second net and open a third net, which will collect a sample from the water as the net is hauled back to the boat.  The Tucker trawl aims to collect a sample of krill that live near the edge of the continental shelf and the deep ocean.

3:46pm – After a full day of action, the boat is turning back toward shore and heading toward the Bodega Bay Marina. 

5:42pm – The boat is pulling in to the marina at Bodega Bay.  Once the crew secures the boat along a dock, our day will be “done.”  We will eat aboard the boat this evening, and then likely hit the bunks pretty early so that we can rise bright and early again tomorrow morning, ready to do it all again along a different transect line!


Did You Know?

The word copepod means “oar-legged.” The name comes from the Greek word cope meaning oar or paddle, and pod meaning leg. Copepods are found in fresh and salt water all over the world and are an important part of aquatic food chains. They eat algae, bacteria, and other dead matter, and are food for fish, birds, and other animals. There are over 10,000 identified species of copepods on Earth, making them the most numerous animal on the planet.

Sue Cullumber: Hooray, We Are Finally on Our Way! June 10, 2013

NOAA Teacher at Sea
Sue Cullumber
Onboard NOAA Ship Gordon Gunter
June 5–24, 2013

Mission: Ecosystem Monitoring Survey
Date: 6/10/13
Geographical area of cruise:  The continental shelf from north of Cape Hatteras, NC, including Georges Bank and the Gulf of Maine, to the Nova Scotia Shelf

Weather Data from the Bridge:
Time:  21:30 (9:30 pm)
Longitude/latitude: 40.50289N, 68.76736W
Temperature  14.1ºC
Barrometer 1017.35 mb
Knots  10.2

sueleavingport

Leaving Newport – photo by Chris Melrose.

Science and Technology Log:

After several ship issues, we were able to finally head out from Newport, RI on June 9th after 4 extra days in dock.  We have started the survey and are using two main types of equipment that we will deploy at the various stations: CTD/Bongo Nets and CTD Rosette Stations.  We were originally scheduled to visit about 160 stations, but due to the unforeseen ship issues, these may have to be scaled back.  Some of the stations will just be the Bongo and others only the Rosette, but some will include both sets of equipment.

Bongos

Bongo and baby bongos being deployed during the survey.

A bongo net is a two net system that basically, looks like a bongo drum.  It is used to bring up various types of plankton while a CTD is mounted above it on the tow wire to test for temperature, conductivity and depth during the tow. The two nets may have different sizes of mesh so that it will only  filter the various types of plankton based on the size of the holes.  The small mesh is able to capture the smaller phytoplankton, but the larger zooplankton (animals) can dart out of the way and avoid being captured. The larger mesh is able to catch the zooplankton but allows the phytoplankton to go through the openings. There are regular bongo nets and also baby bongo nets that may be launched at the same time to catch different types of plankton.

rosetteinwater

Rosette CTD returning to the surface.

The Rosette CTD equipment is a series of 10 cylinders that can capture water from different depths to test for nutrient levels and dissolved inorganic carbon, which provides a measure of acidity in the ocean. These are fired remotely via an electronic trigger that is programed by a computer program where each cylinder can be fired seperately to get 10 samples from different depths.  It also has several sensors on it to measure oxygen, light and chlorophyll levels, as well as temperature and salinity (salt) from the surface to the bottom of the water column.

plankton

Copepods and Krill from one of the bongo net catches.

Our first station was about 3 1/2 hours east of Newport, RI and it was a Bongo Station.  I am on the noon to midnight shift each day.  So on our first day, during my watch, we made four Bongo stops and two CTD Rosettes. Today we completed more of the Bongos on my watch.  We are bringing up a variety of zooplankton like copepods, ctenophores, krill, and some fish larvae.  We have also seen quite a bit of phytoplankton on the surface of the water.

sueinsurvivalw

Wearing the survival suit – photo by Cathleen Turner.

Personal Log:

Being on a ship, I have to get used to the swaying and moving about.  It is constantly rocking, so it can be a little challenging to walk around.  I have been told that I will get used to this and it is actually great when you want to go to sleep!  Luckily I have not had any sea sickness yet and I hope that continues!  We completed several safety drills that included a fire drill and abandon ship drill where we had to put on our survival suits – now I look like a New England Lobster!

dolphinsfav

Common dolphins swimming off the ship’s bow.

blueshark

Blue shark swimming beside the Gordon Gunter.

Today was an amazing day – was able to see Right Whales, Blue Sharks and Common Dolphins – with the dolphins surfing off the ship’s bow!  The Northern Right Whale is one of the most endangered species on the planet with only 300 left in the wild.  One of the reasons there are so few left is that swim on the surface and were excessively hunted and there feeding areas were within the Boston shipping lanes, so they were frequently hit by ships. Recently these shipping lanes have been moved to help protect these animals.  So I feel very privileged to have been able to see one!

Did you know? Plankton are the basis for the ocean food web.  They are plentiful, small, and free floating (they do not swim). The word plankton comes from the Greek word “planktos” which means drifting. “Plankton” from the TV show SpongeBob is actually a Copepod – a type of zooplankton.

Copepod

Copepod

Question of the day:  Why do you think it is important that the scientists study plankton?

Jennifer Fry: March 18, 2012, Oscar Elton Sette

NOAA Teacher at Sea
Jennifer Fry
Onboard NOAA Ship, Oscar Elton Sette
March 12 – March 26, 2012

Mission: Fisheries Study
Geographical area of cruise: American Samoa
Date: March 18, 2012


This juvenile lobster was found in the Cobb trawl net.

Pictured here is a copepod (right) and a jelly (left) found in the plankton net.

Pictured here is a copepod (right) and a jelly (left) found in the plankton net.

Scientists, like John Denton, often get hungry during late night trawls. Here he is tempted to eat his recent catch. Tafito Aitaoto, American Samoan scientist, looks on.

Scientists, like John Denton, often get hungry during late night trawls. Here he is tempted to eat his recent catch. Tafito Aitaoto, American Samoan scientist, looks on.

The cookie cutter’s mouth can be very destructive. While biting its victim, it rotates its mouth taking a “chunk” of flesh.

cookie cutter shark

While biting their victim, the cookie cutter shark then turns their mouth to take a deeper bite of flesh. This leaves a large gash making it more difficult to heal

Two cookie cutter sharks came up in the Cobb trawl net. The scientists onboard the Sette were very excited to view these rare fish.

The stewards/cooks on the Sette are Clementine Lutali, Jay Egan, and Jeffrey Falini.  They have created the most amazing fare including traditional Samoan dishes.  Clem, the Head Cook, told me that the Sunday meal  in American Samoa is very important and she was right. Families in American Samoa gather in the morning for church, and then meet with the entire extended family for a large mid-day meal, followed by a nap.  This includes everyone; grandparents all the way down to babies.  In the afternoon families might take a walk to the beach for some family time and then have an afternoon tea with home-baked bread.

Our Sunday evening meal aboard the Sette consisted of turkey gravy and dressing, roast beef and au gratin potatoes, and green papaya salad with roasted garlic and peanuts. We finished with a lovely dessert of Puligi Keke, a Samoan coconut cake served with Crème Anglaise.

Some other Samoan dishes we’ve had onboard are:

Savory dishes:

Faálifu:  boiled and cooked in coconut milk and caramelized onions

Faalifu Kalo: taro in coconut milk

Faalifu Fai: green bananas in coconut milk

Faiai Feé: Octopus with coconut milk

Faiai Pilikaki: Can of mackerel with coconut milk

Faiai Eleni: Can of tomato mackerel with coconut milk

Oka: Samoan raw fish, tomatoes, and onions marinated in fresh coconut milk

Mochiko lehi: a Hawaiian method of frying fish (lehi, a type of snapper) Mochiko can be done to chicken too.

Ulu/ breadfruit

Another wonderful way to serve breadfruit is fried with a touch of salt. Yum.

Breadfruit is a starchy staple of the American Samoan diet.

There are many kinds of ulu/ breadfruit  in American Samoa including: máafala, uluvea, puuoo, aveloloa, ulumanua. Breadfruit is used as a starch in the American Samoan diet, including:

  • potato salad substitute,
  • Uluwua: unripe ulu is baked on banana leaves in a traditional Samoan oven, served dipped in coconut milk

Method of cooking:

Much of Samoan cooking is done outside in an oven called an umu.

  • Umu: Samoan Oven.  American Samoans use a traditional outdoor oven. It starts with a roaring fire set in a brick oven.  After the firewood has died down, hot, smooth rocks are layered over the burnt wood.  Cooking continues using the hot rocks as the heat source.
  • Suaia: Fish chowder with fresh coconut milk
  • Kale Faiai: curry with coconut milk

Desserts:

  • Puligi keke: steamed cake with white cream sauce
  • Panikeke: deep fried donut cake
  • kake: Samoan cake
  • Suali: a banana pudding similar to tapioca
  • Paniolo: (Hawaiian cowboy bread) cornbread with pineapple and coconut milk
  • Fáausi Taro: Raw pounded taro shaped into balls like hush puppies.  Sauce: Caramelized sugar and coconut milk.

An American Samoan delicacy, Fáausi Taro is raw pounded taro shaped into balls served with caramelized coconut sauce.

Panipopo:  buns made with fresh coconut milk served with a fruit glaze.

PANI POPO (COCONUT BUNS)
9 cups flour, divided use
3 3/4 teaspoons active dry yeast
3 1/2 cups milk
1/4 cup butter
1/3 cup sugar
2 1/4 teaspoons salt
You’ll need two 8 1/2-inch-by-11-inch baking pans for this recipe.
Set aside 3 cups of flour. Mix 6 cups flour and yeast. Heat milk, butter, sugar and salt until warm and butter is just melting (about 120 degrees). Add this to the flour and yeast mixture. Mix for 30 seconds on low speed; then mix for 3 minutes on high speed.
With wooden spoon, add the rest of the flour; knead for 6 to 8 minutes. Place dough in a large greased bowl; flip once to grease both sides of dough. Cover and let rise in a warm place for 1 hour.

While dough is rising, prepare coconut sauce:
4 cans (14 ounces) coconut cream
2 cups sugar

Mix well in bowl with whisk. Set aside.

Make a fist and punch down middle of dough to collapse dough.
Divide dough into 2 parts; let rest on lightly floured surface for 10 minutes. Roll out into a rectangle about 16 inches by 9 inches. Brush top of dough lightly with coconut sauce.

Roll dough tightly into a long roll. Cut into 9 pieces. Place in baking pan. Repeat with second half of dough. Cover and let rise another 30 minutes. Pour 3 cups of coconut cream over each pan. Bake at 375 degrees for 50 minutes or until golden brown. Makes 18 buns.

This giant salp was caught in the trawl net.

This giant salp was caught in the trawl net.

NOAA Scientists Evan Howell, Ryan Nichols, Tafito Aitaoto, Jamie Barlow all enjoy a great Samoan meal in the galley aboard the Sette

After dinner, we watched fishing off the longline pit.  As fish were caught using long lines, we were treated to an Hawaiian island delicacy by NOAA officer Justin Ellis, Hawaiian Shave Ice: fluffy ice, sweetened condensed milk, assai beans, your choice of syrup (coconut, pineapple, passion fruit), vanilla ice cream.

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The fishing ventures were successful bringing in 2 fish: a rare Sickle Pomfret and an orange fish.

I went to bed early since I would join the small boat operation in the morning.

Small shrimp (too many to count)

The crustaceans are sorted into a tray and then counted, measured volume(ml), and weighted (g).

Student Questions:

Q: Do you eat the fish you catch?

A: Yes, the stewards (cooks) on board prepare the fish that is caught everyday.  The snapper and tuna have been made into many tasty Samoan dishes.

The bite from this cookie cutter shark can be very painful.

Q: Have you seen any sharks?

A:  Yes, the most interesting shark we caught in the net was the cookie cutter shark.  Its bite is very unique.  As it bites its victim it turns its mouth taking a deeper piece of flesh, which makes the healing process slower.

Elizabeth Bullock: Day 3, December 13, 2011

NOAA Teacher at Sea
Elizabeth Bullock
Aboard R/V Walton Smith
December 11-15, 2011

Mission: South Florida Bimonthly Regional Survey
Geographical Area: South Florida Coast and Gulf of Mexico
Date: December 13, 2011

Weather Data from the Bridge
Time: 4:45pm
Air Temperature: 23.5 degrees C
Wind Speed: 15 kt
Relative Humidity: 68%

Science and Technology Log

Liz deploys a drifter

I'm deploying a drifter!

Last night, we deployed our first drifter.  There will be three deployed over the course of this cruise.  The frame of this drifter is built by the scientists at AOML (Atlantic Oceanographic and Meteorological Laboratory).  Afterwards, they attach a satellite transmitter so they can track where the drifter goes.  This helps them measure the surface currents.

What are some other types of research being conducted onboard?  I’m glad you asked!  Two NOAA researchers, Lindsey and Rachel, are studying water chemistry and chlorophyll.  They take samples of surface water from the CTD to study CO2 and the full carbonate profile.  They also use water collected at many different depths to study the chlorophyll content.  Chlorophyll is an indicator of the amount of phytoplankton in the water.

Collecting water from the CTD

Collecting water from the CTD.

Sharein, a PhD student at the University of Miami Rosenstiel School of Marine and Atmospheric Science, is studying a specific type of plankton called copepods.

The particular copepod that she is studying is food for the larval stages of some commercially important species of fish such as bill fish (which include blue marlin, sail fish, white tuna, and yellowfin tuna) and different species of reef fish.  If a species is commercially important, it means that many people depend on this particular fish for their livelihoods.

Female Copepod

Here is one of the species of copepods that Sharein is studying.

Do you think you would be interested in working at sea?  You would be a good candidate if you:

1)      Like meeting new people and working as part of a team

2)      Are interested in the ocean, weather, and/or atmosphere

3)      Don’t mind getting your feet wet

Personal Log

When we were on our way to the Tortugas, we didn’t have cell service and the TV in the galley had no signal.  It was nice to be disconnected for a while.  Although there are still 29 computers onboard which all have the internet, so we’re hardly off the grid!

It was hard at first to adjust to the night shift, but everyone onboard was really supportive.  Working the night shift means that you work from 7pm to 7am.

Species seen last night in the Neuston net:

Flying fish

Needle fish

Different kinds of sea grasses and sargassum

Moon jellies

Sue Zupko: 12 What’s in the Water?

NOAA Teacher at Sea: Sue Zupko
NOAA Ship: Pisces
Mission: Extreme Corals 2011; Study deep water coral and its habitat off the east coast of FL
Geographical Area of Cruise: SE United States from off Mayport, FL to St. Lucie, FL
Date: June 8, 2011
Time: 1900

Weather Data from the Bridge
Position: 25.3°N  79.6°W
Present weather: 3/8 Alto Cumulus
Visibility: 10 n.m.
Wind Direction: 065°true
Wind Speed: 10 kts
Surface Wave Height: 3 ft
Swell Wave Direction: 110°
Swell Wave Height: 3 ft
Surface Water Temperature: 28.4°
Barometric Pressure: 1013.2 mb
Water Depth: 363 m
Salinity: 36.28 PSU
Wet/Dry Bulb: 27.7/24.8

This blog runs in chronological order.  If you haven’t been following, scroll down to “1 Introduction to my Voyage on the Pisces” and work your way back.

Take this quiz before reading this post.

Bucket hanging by rope in water

Straining bucket

Dr. Diego Figueroa and I went fishing over the side of the ship this evening with a straining bucket to try to catch zooplankton (animals which cannot swim against the current–free floating).  We had no plankton net so we had to improvise.

Diego pouring a cup of water into a bucket from the bottom

Diego pours water into the bottom of the bucket

Diego, a zooplankton expert, got a plastic container like you’d use to store food in the fridge, and we headed to the lab with what we hoped would be a good catch.  He got a cup of salt water from the special faucet in the ship’s science lab and poured it into the bottom of the bucket.  As he poured the water, he had the plastic container at the top of the it to retrieve our catch.

Diego peering into a plastic food container with water

Diego examines our catch

We  then examined the container to see what the naked eye could find.

Wow!  Our first specimen was a shrimp.  It’s huge.  Well, huge in comparison to the other zooplankton.  We still saw it best under the microscope.  He left that in to container to pull out later and caught some copepods with an eye dropper.

White buglike creature, transluscent, with long antennae

Calanus copepod

Eureka!  There were at least six Calanus copepods.  Cope– is Greek for oar or handle and pod–  means foot or limb.  These are very common off the coast of Florida and about 80% of all the zooplankton on the planet are some type of copepod.  He explained that the Calanus has five rows of legs that flap downward (like the doggie paddle that most of of use when learning to swim) in order to move around.  The Calanus eats phytoplankton (algae), making it a primary consumer.  It has five pairs of mouth parts.  The hairy seta (the plural is called setae)  act like a sieve when it eats.  This is so interesting.  The Calanus opens its mouth parts and gathers water molecules toward its body.  Then, it pulls its mouth parts in and squeezes the water out. What’s left is a scrumptious meal of diatoms.  The grazing copepod we watched was a female.  Her tail is shaped differently than the male’s tail.

The shrimp is at least 20 times bigger than the Calanus.  Diego hasn’t studied the shrimp like he has the copepods.  That’s because the shrimp are one of the bigger zooplankton and large ones make up only about 5% of all zooplankton.  He says that there are more copepods in the world than all the insects combined.  That makes sense since the earth’s surface is  71% water.

Jellyfish with tentacles spread against a black background with white particles near

Jellyfish in snow

When the ROV was flying through the ocean, we always saw snow in the water.  I used to scuba dive a lot and I never really noticed the snow.  If it was deep, they weren’t there.  Andy David explained that we see them so well since we’re shining light on them.  These are mostly zooplankton in the water.  In addition, there is a bunch of decaying organic matter called detritus flying along.

Curled up bee looking creature

Hyperiid

Further examination of the water yielded a Microsetella rosea, a hyperiid, and a Chaetognath (arrow worm). The Microsetella is a detritis-eating filter feeder, but it is only about 1/5 the size of the Calanus.   Well, with micro in its name, small had to figure into it somehow.  Since it’s small, it eats smaller things.

Clear ghost-like arrow-shaped creature surrounded by lines of white

Arrow worm

The arrow worm is like something from a horror movie because it attacks its prey viciously (it’s a carnivore and is a voracious predator).  I asked what all the other floating bits were in the water.  Detritus.  It’s the snow we kept seeing.

White shrimp with one claw showing viewed through microscope

Shrimp

Diego has a special camera which attaches to the microscope.  We would examine the zooplankton in the petri dish and then he would take off the microscope eyepiece and insert his camera.  Then, through the viewfinder, he would try to find the zooplankton resting somewhere.  Apparently, they don’t rest much, but he still got photographs.

Diego searches for our catch under the microscope while Sue looks on

Diego hunting for zooplankton

I really enjoyed this mini lab.  Diego taught me things about plankton in general and I now better understand this amazing  world of particulates in the ocean a bit better.  Jana and I had gone on deck last night to see what it was like in the pitch black.  We discovered it isn’t totally dark, though your eyes do have to adjust.  The moon kept peeking from between clouds off the starboard (right) side and lights shone from portholes below deck.  These lights reflected off the waves and were so fascinating to watch.  I’ve only had a beachside view of the ocean at night so this was a real treat.  Jana and I watched for bioluminescence in the water, a sign of some plankton.  We found little sparkles of green in the wave and hypothesized these were zooplankton.  After explaining what we had seen to Diego, he confirmed that these were zooplankton rather than phytoplankton.  Zooplankton have little sparkles in turning water while phytoplankton will cover a large area and just glow.  Too interesting.

Special thanks to Diego for sharing his knowledge with me after a long day and to Jana for helping get some pictures of this.

And the answer to the quiz above….Copepods.  They are so small you don’t notice them, but there are almost as many copepods as there are grains of sand on the beach.  It’s hard to fathom that many creatures swimming around.  Diego said that they eat the phytoplankton so fast that often there are more zooplankton than phytoplankton.

Laura Rodriguez, May 24th, 2010

NOAA Teacher at Sea
Laura Rodriguez
Aboard NOAA Ship Oscar Dyson
May 24 – June 2, 2012

Mission: Fisheries Surveys
Geographical Area: Eastern Bering Sea
Date: May 24, 2010

Pollock Survey Begins

Robert and Kerri deploy the CTD

Deploying the Bongo nets

The bongo nets are almost in

Retrieving the bongo nets, full of algae and hopefully full of Pollock Larvae

On Saturday, my watch began at 10:00 AM. Two of the scientists, Annette Dougherty and Kevin Bailey have watch from 4 AM until 4 PM. The other two scientists, Tiffany Vance and Steve Porter, have watch from 4 PM until 4 AM. I guess being the teacher they took pity on me and gave me half and half. Before getting to one of the stations, the scientists make sure that everything is ready. They lay out the bongo nets on the deck where they will be used. The bongo nets are two nets that from the top look like bongo drums. (See picture) There is an instrument attached to the bongo nets called a SEACAT that takes conductivity, temperature and salinity measurements during the tow. Inside the lab, buckets, bowls and tweezers are all laid out ready to be used.

As we approach each station, the bridge informs the scientists and survey technicians. The bongo nets have already been readied and are set to be deployed (put into the ocean) from the hero platform. When the OK is given, the nets are lifted by the hydrowinch to a point where they can be maneuvered over the rail and then they are lowered into the water. The nets are lowered until they are at 100 meters or 10 meters off the bottom. As they are lowered, the pilot of the boat keeps the wire at a 45° angle by moving the boat slowly forward. Once the nets reach their maximum depth, they are slowly brought back up again.  ( I tried to upload a video showing the deployment and retrieval of the bongo, but it won’t work so I’ll show you the video when I get back.

Pollock larvae under the microscope

When the nets clear the water, they are hosed down to get any organisms into the bottle on the end of the net (called the cod end.) The cod end is then removed and the contents of one net are poured into a bucket for sorting. The contents of the other net are preserved and sent to a lab in Poland where they use instruments to get a very accurate count of the Pollock.

Annette Dougherty and Kevin Bailey in the chem Lab

Inside the chem lab, the contents of the bucket are scooped out and poured little by little into a mixing bowl. We then perform a rough count by removing the very small Pollock larvae and any other fish larvae and put them into a petri dish with cold water (the petri dish is placed on top of ice.) They are only a few mm long (averaging between 6-10mm.) Once we have gone through the entire contents, the Pollock larvae are counted, photographed and the length measured. They are then placed into a labeled vial with 95% ethanol. The other fish larvae are placed in a separate vial in 100% ethanol. They are kept in case another scientific team needs the data. The Pollock larvae will be sent to the scientists’ lab back in Seattle where they will perform further analysis on them. I’ll tell you more about that in the next blog.

 

Answers to your questions:

Annalise – The ship travels at 12 knots when we are going between stations.

Abandon Ship drill – You need to know how to put on your survival suit

Matt T– The ship is very safe. Drills are conducted every week. My first day on the ship, we had a fire drill and abandon ship drill. (See photo of me in my survival suit.)

Dan – The Oscar Dyson observes and records a number of environmental conditions. The bridge takes weather readings every hour and keeps them in a weather log. These include wind direction, wind speed, seawater temperature, air temperature, air pressure, cloud cover, sea swell height and direction. Conditions in the water are also constantly monitored such as temperature, conductivity, salinity, and amount of oxygen.

Olivia – The bongo tow is one way to get fish eggs. The mesh used on the bongo nets is very fine). It is able to filter out these very small larval fish and fish eggs, too.

Brittany – There is no specific number of fish that need to be caught for this experiment. Part of the experiment is to see how many larval fish there are. For our rough count, the scientists measure 20 larvae to get an estimate of their size. They will then look at the otoliths (small inner ear bones) to estimate their age.

Euphausid – Krill

Copepod

Amy – Aside from the Pollock larvae in the nets, we have caught cod larvae, larval squid, fish eggs, amphipods, terapods, jellies, Euphausids or krill, copepods and the larvae of other fish. The nets are small enough that we don’t catch any large fish or other animals.

Josh W. and Jon – Joel Kellogg has the night shift, so I haven’t met him yet. Stephen Macri is not on this cruise so I can’t ask him your questions.

 

Questions for today

In your answers to the last blog, many of you researched the large animals that live here in the Gulf of Alaska. The most abundant organisms, however, are much smaller. Two organisms that are very important to the survival of the large animals here are copepods and Euphausids. The larval Pollock feed on the larval copepods that are called copepodites.

Find out what other animals feed on copepods and euphausids. Then, describe at least one food chain that includes copepods and one that includes krill. In your food chain start with a producer or autotroph Ex. Algae) and end with the highest level of consumer or predator (Ex. blue Whale)

 

Again, Please be sure to include the link to the website where you got your information.  Answer the questions in your own words writing complete sentences with as much detail as you can.

Justin Czarka, August 12, 2009

NOAA Teacher at Sea
Justin Czarka
Onboard NOAA Ship McArthur II (tracker)
August 10 – 19, 2009 

Mission: Hydrographic and Plankton Survey
Geographical area of cruise: North Pacific Ocean from San Francisco, CA to Seattle, WA
Date: August 12, 2009

Weather Data from the Bridge 

Sunrise: 06:25 a.m.
Sunset: 20:03 (8:03 p.m.)
Weather: isolated showers/patchy coastal fog
Sky: partly cloudy
Wind direction and speed: North 10-15 knots (kt)
Visibility: unrestricted to less than 1 nautical mile (nm) in fog
Waves: northwest 4-6 feet
Air Temperature: 17.3 °C
Water Temperature: 16.6 °C

Science and Technology Log 

Justin Czarka collects water samples to use in nutrient and chlorophyll research.  While on the deck during “ops” (operation) all personnel must wear a life jacket and hardhat.

Justin Czarka collects water samples to use in nutrient and chlorophyll research. While on the deck during “ops” (operation) all personnel must wear a life jacket and hardhat.

This log discusses the purpose behind the scientific cruise aboard the McArthur II. The cruise is titled, “Hydrographic and Plankton Survey.” The cruise is part of a larger study by many scientists to, in the words of chief scientist, Bill Peterson, “understand the effects of climate variability and climate change on biological, chemical and physical parameters that affect plankton, krill, fish, bird and mammal populations in Pacific Northwest waters.”  This specific cruise focuses on hydrology, harmful algal blooms, zooplankton, krill, fish eggs, fish larvae, and bird and mammal observations.

I will provide an overview of these aspects of the cruise. The McArthur II is set up with sensors for salinity, temperature, and fluorescence that provide a continuous monitoring of the ocean (hydrology) throughout the cruise.  In addition at various points along the transect lines (see the dots on the diagram of the cruise route on page 2), the CTD is deployed into the water column at specific depths to determine salinity (via measuring conductivity), water temperature, and depth (via pressure), and collect water samples (which we use to measure chlorophyll and nutrient levels at specific depths). The transects (predetermined latitudes that forms a line of sampling stations) have been selected because they have been consistently monitored over time, some since the late 1980s.  This provides a historical record to monitor changes in the ocean environment over time.

The dots represent planned sampling station. Due to sea conditions, these have been slightly modified.

The dots represent planned sampling station. Due to sea conditions, these have been slightly modified.

One scientist, Morgaine McKibben from Oregon State University, is researching harmful algal blooms (HAB). HABs occur when certain algae (the small plants in the ocean that are the basis of the food web) produce toxins that concentrate in animals feeding on them.  As these toxins move up the food web through different species, they cause harmful effects in those species, including humans.  Bill Peterson (NOAA/ Northwest Fisheries Science Center) and Jay Peterson (OSU/Hatfield Marine Science Center) are studying copepod reproduction. They are collecting data on how many eggs are laid in a 24 hour period, as well as how the copepod eggs survive in hypoxic (low oxygen) conditions.  Mike Force, the bird and marine mammal observer is keeping a log of all species spotted along the cruise route, which is utilized by scientists studying the species.

Personal Log 

Tiny squid collected in a vertical net and viewed under microscope on Crescent City transect line at 41 deg 54 min North.

Tiny squid collected in a vertical net and viewed under microscope on Crescent City transect line at 41 deg 54 min North.

Who said you never find the end of the rainbow? All you have to do is go out to sea (or become a leprechaun!). We have been going through patches of fog today, putting the foghorn into action.  When it clears out above, yet is foggy to the horizon, you get these white rainbows which arc down right to the ship. We have become the pot of gold at the end of the rainbow. Who knew it was the McArthur II! If you follow the entire rainbow, you will notice that it makes a complete 360° circle, half on top the ocean and half in the atmosphere near the horizon.

I enjoyed using the dissecting microscope today.

The water collected from the vertical net is stored in a cooler on the deck to be used in experiments.  I was able to collect a sample of the water, which contained a diverse group of organisms, from tiny squids to copepods to euphausiids.  These tiny organisms from the size of a pinhead to a centimeter long are critical to the diets of large fish populations, such as salmon.  Under magnification, one can see so much spectacular detail.  I have learned how essential it is to have an identification guide in order to identify the names of each copepod and euphausiid.  On the other hand the scientists tend to specialize and become very adept at identifying the different species.

Animals Seen Today 

Arrow worms (long clear, with bristles)
Shrimp Copepods
Tiny rockfish (indigo colored eyes)
Fish larvae