R/V Tiglax – Page 2 – NOAA Teacher at Sea Blog

September 23, 2019

Cara Nelson: A Harbor in a Tempest, September 21, 2019

NOAA Teacher at Sea

Cara Nelson

Aboard USFWS R/V Tiglax

September 11-25, 2019

Mission: Northern Gulf of Alaska Long-Term Ecological Research project

Geographic Area of Cruise: Northern Gulf of Alaska – currently sheltering in Kodiak harbor

Date: September 21, 2019

Weather Data from the Bridge:

Time: 12:20
Latitude: 57º47.214’ N
Longitude: 152º24.150’ E
Wind: Southwest 20 knots
Air Temperature: 12.8ºC (55ºF)
Air Pressure: 990 millibars
Clear skies

Science and Technology Log

As we sit in the shelter of Kodiak harbor, I thought I would dedicate this blog to the R/V Tiglax and her crew. Careers in oceanographic research would not be possible without the support of research vessels and their crew. R/V Tiglax is a 121-foot long U.S. Fish and Wildlife vessel that was commissioned in 1987. Her primary mission is to support scientific research in the Alaska Maritime Wildlife Refuge in the Aleutian chain and she was designed and built to accommodate this mission.

R/V Tiglax layout — *The layout of R/V* Tiglax. Image credit: U.S. Fish & Wildlife Service

R/V Tiglax has an amazing fuel capacity of 40,000 gallons which allows it be away at sea for long periods each summer without refueling. Additionally, it has a water desalination system that can produce approximately 500 gallons of fresh water daily. The ship seems to have at least two of everything: 2 engines, 2 generators, 2 cranes, 2 zodiac skiffs, 2 freezers, 2 washing machines, 2 stationary bikes, 2 televisions, and at least 2 fresh baked goods every day!

Below is brief photo tour of the interior of R/V Tiglax.

Tiglax hallway — *Looking down the hallway from the main deck aft.*

Tiglax mess — *The mess, where we eat all our meals and spend our down time.*

Tiglax galley — *The galley, where our amazing meals are prepared, even during 12-foot seas!*

*Down in the hold, there are several staterooms, storage rooms, and the very important laundry and boot dryers.*

*My stateroom. There are 4 beds total and a small desk, and I have the top bunk.*

Tiglax hold — *The hold, where the science crew stores a lot of gear during the trip.*

Tiglax science lab — *One of the two science labs onboard. Active research is done throughout the day here as samples come aboard.*

Much of the summer, R/V Tiglax can be found transporting scientists to remote field camps in the Western Aleutians and then up into the Bering Sea to the island of St. Matthews. The science the ship supports is diverse and includes seabird and marine mammal monitoring, volcanic research, invasive species management and archeological studies. Although the crew does not participate in this research directly, they are a critical piece to its success. They are responsible not just for the transport but also for the logistics of getting the scientists from ship to shore at each of the remote sites and assisting with the setup of equipment.

Since 2005, R/V Tiglax has been supporting the oceanographic research on the Seward line and for the past two years the ship has been contracted by the LTER project for $11,376 per day to complete the spring and fall cruises. Again, the crew plays an integral part in this ocean research. All of cranes and winches aboard the ship that are used for the water sampling gear and nets are operated by the crew. Additionally, the captain and first mate navigate the ship to and from sampling sites and manage the vessel amid the changing seas during sampling sessions. Their knowledge of the ship, currents, weather and tides is imperative in making decisions with the chief scientists as to travel, scheduling, and sampling.

*Captain John navigating the ship from the wheelhouse.*

R/V Tiglax has a crew of six: a captain, first mate, two deckhands, an engineer and a cook. For some, being a crew member is a long-time career choice. For others, it is a job to gain skills and experience and serves as more of a stepping stone to the future.

John Farris began his career aboard R/V Tiglax nineteen years ago as a deckhand and has moved his way up to captain, a position he has held for the past four years. He works closely with Russ Hopcroft, the chief scientist, to assure the success of the mission. John is warm and welcoming to the science crew and genuinely concerned about each member’s well-being during the cruise. Safety is his number one priority and John closely monitors not only the ship but also the science work each day.

crew meeting — *Captain John meets with the science team prior to deploying the CTD rosette.*

Dan Puterbaugh is the first mate who has been a member of the crew for the past two years. Dan has thirty-years’ experience working on ships in a variety of capacities and has a wealth of knowledge of the oceans. He pilots the ship from 10 pm – 6 am and helps oversee the science team on the night shift. Dan greets each day with a smile and his passion for being out at sea and supporting the science research that goes on is truly evident.

Dan Puterbaugh, first mate — *Dan keeping watch in the wheel house.*

The two deckhands aboard the ship are Dave and Jen. Dave works the day shift with John and has been a crew member for the past 6 years. He shares the challenges of working the night shift versus the day shift on the ship and is happy to have worked his way up to his current position on the crew. Dave describes the sheer beauty of the Aleutians and the seabirds and marine mammals that inhabit them and how appreciative he is to experience this during his work.

Jen works on the night shift and joined the crew just this season. She is one of the most interesting and eclectic individuals I have ever met. Although she is new to the ship, she is not green and can maneuver a crane or a winch with precision and style. Jen’s spirit and energy helped get us through the long hours of the night shift. She enjoys combining her passion for science with her love of the ocean and will spend her winter crewing aboard a tall ship for the Woods Hole Semester at Sea program. Whatever Jen’s future holds, it is assured to be tied to the sea.

Jen, deckhand — *Jen getting time at the wheel.*

Andy, the ship’s engineer, began with his time aboard R/V Tiglax eleven years ago. He, like others before him, started out as a deckhand and worked his way up in the ranks. He spent time in the Navy doing propulsion work, so this experience serves him well in maintaining the mechanics of the Tiglax. Although Andy is a bit more elusive, he is always right there when things needed repair. He helped us get through several winch issues, a broken hydraulic line on the crane and a downed freezer and refrigerator in the galley.

Last, but most importantly, is Morgan, the chef aboard R/V Tiglax. Morgan has been with the ship for six years, and continues to wow the crew and scientists alike with her amazing meals. Morgan attended culinary school in Denver before joining the ship as a relief cook her first summer. When asked about how she manages to cook during high seas she says it took some getting used to at first but she quickly learned to manage. Morgan’s talents are apparent in her daily fresh sourdough breads and home-made desserts. Despite being out to sea for long periods of time, she maintains variety in each meal and does her best to infuse fresh ingredients wherever possible. Morgan will spend her winter furthering her culinary training in Portland before returning for another season with the ship.

Morgan's puff pastries — *Morgan’s puff pastries with homemade raspberry rhubarb sauce. They disappear so fast I couldn’t even photograph a full pan.*

Personal Log

As is the theme for this September cruise, we once again were chased ashore by our fourth gale. On Thursday night, just after starting our night shift we were shut down by the building wind and waves and made a 16-hour harrowing transit from the Seward line to shelter in Kodiak harbor and reevaluate as the weather. Although we were not happy to be missing more sampling, everyone was appreciative for the time to get cell reception and step foot on solid land.

We arrived in Kodiak harbor at 5pm on Friday night and had the fortune of docking at the state ferry dock. After eating dinner aboard, we all ventured off into town. My dock rock continued as all of Kodiak seemed to be moving up and down and side to side. All the crew and scientists ended up in same spot and enjoyed socializing together on our down time. We returned to the ship and all appreciated a night of sleep that didn’t involve almost rolling out of the bed with each swell.

Cara on ladder — *Climbing off the ship can be challenging when the tides are low.*

This morning we awoke to blue skies and strong winds. Unfortunately, the night crew caved in at 3am and slept for a few hours. Having a day off from work makes it easy to slip back to the normal schedule and working tonight might be difficult. We await the afternoon forecast to see if we can head out to sample the Kodiak line before another gale blows in on Monday. One thing that I have learned this trip is that successful oceanographic research requires a delicate dance with Mother Nature.

Did You Know?

R/V Tiglax often travels up to 20,000 nautical miles in one season! A nautical mile is equal to 1.15 land measured miles and is based on the circumference of the earth. One nautical mile is equal to one minute of latitude and is useful for charting and navigating.

September 21, 2019

Cara Nelson: Chemistry on the High Seas, September 19, 2019

NOAA Teacher at Sea

Cara Nelson

Aboard USFWS R/V Tiglax

September 11-25, 2019

Mission: Northern Gulf of Alaska Long-Term Ecological Research project

Geographic Area of Cruise: Northern Gulf of Alaska – currently sampling along the Seward line.

Date: September 19, 2019

Weather Data from the Bridge:

Time: 18:30
Latitude: 59º53.587’ N
Longitude: 149º33.398’ E
Wind: South 15 knots
Air Temperature: 15.5ºC (60ºF)
Air Pressure: 998 millibars
Partly cloudy skies

Science and Technology Log

A major component of the Long-Term Ecological Research (LTER) project is the collection and analysis of physical parameters in the Northern Gulf of Alaska (NGA) and how these abiotic (non-living) factors interact with and impact the biological community. A variety of physical oceanographic research is occurring during the day shift on R/V Tiglax, one of which includes looking at metals in the ocean water.

Mette Kaufmann is the onboard research professional working on the collection of trace metals from the surface water. Specifically, Mette is working to sample and process iron species for Dr. Ana Aguilar-Islas who is the principal investigator for iron biogeochemistry on the LTER study. One might ask, why is there such a focus or interest in iron in the surface ocean water? In the past few decades it has become evident through research that iron is major player in the productivity of the ocean ecosystem. Prior to this, nitrogen was assumed to be the most important nutrient and limiting factor in phytoplankton growth and production. It is now known that iron influx from surface and atmospheric sources is the major limiting factor in our coastal and offshore ecosystems.

Glacier runoff from the Kenai peninsula and the Copper River plume carry this iron into the ocean and allow for a rich spring bloom of phytoplankton over the continental shelf. Sampling the iron levels at different locations helps paint a picture as to the overall availability, transport and use of iron in the NGA. For example, one question the researchers are examining is, do fall storms bring up iron to the surface from deeper water? Additionally, copper samples are being collected for analysis on this cruise, as a factor that can potentially suppress photosynthesis at higher levels.

As I mentioned in my second blog, there is a tool for every job and for iron sampling, it is the “iron fish.” The iron fish looks a bit like a rusty torpedo being dragged next to the boat with a simple plastic hose attached to it. However, looks can be deceiving, as this piece of equipment is quite high tech.

The actual sampling piece of the iron fish is the white tubing that can be seen in the picture below. The tip of the tubing has a red cap and is attached to the weight. This tubing is treated with acid and has an inner lining of Teflon to assure for a “clean” catch of metals.

*The iron fish tubing coiled up with the red-capped collection tip attached to the weight.*

As we transit between stations the iron fish is towed at 1-3 meters of depth off the starboard side of the boat. The pump, which runs off of the boats air supply, send the water through the tubing and into the “van” on the mid deck. This van is a small connex that is used for trace metal processing. Inside the van, the water samples are processed through a 0.4-micron filter to remove any particulates and then stored in acid for analysis back in the metals laboratory at UAF.

*The iron fish being towed while underway and sending samples into the van on the deck.*

*Annie Kandell, a graduate student under Dr. Aguilar-Islas, works to process the water samples in the van clean room to avoid contamination.*

Personal Log

As we started our shift on Tuesday evening heading into Wednesday morning, we knew a gale was approaching. We wanted to squeeze in as many sampling stations as we could before the weather chased us away. It was challenging to manage both the Methot and Multinet in the high seas and building wind, but also a lot of fun. We were handling the waves crashing over the back deck and rushing across us as we sampled and measured and getting really good at pouring off the cod-ends with the rise and fall of the boat in the swell. Unfortunately, by our third station of five, the wind and waves were putting such a strain on the winch that the Multinet couldn’t get an accurate reading or sample. The winch began to not respond and the decision was made to call it for the night, even though it was only 2:30am. We strapped things down and proceeded to make a run for shelter back in Resurrection Bay.

I awoke on Wednesday at around 11am expecting it to be raining sideways and blowing still, but was surprised again by partly cloudy skies and a much calmer sea state. I was pleasantly surprised to hear that we were going to take the afternoon for an excursion to Bear Glacier. We all donned our mustang coats and took three groups in the zodiac to head to shore. We were diverted due to rough breakers to a separate beach away from the glacier but all of us were happy to be ashore.

group photo — *The night shift and part of the day shift preparing to go ashore.*

We had about 4 hours to hike around and explore the shoreline. One of the drawbacks of the beauty of the amazing rocky shoreline along the Gulf of Alaska is that it is littered with human trash. The trash entering from around the Pacific circulates through the ocean driven by the currents. Some of the water gets caught up in the counterclockwise gyre of the Gulf of Alaska current and then gets deposited on land by the storms. Just a few steps onto the shore and plastic water bottles are visible everywhere. What is less visible is the plastics that are broken up into small pieces or micro-plastics that then invade the entire water column. These plastics get ingested by marine organisms, such as seabirds, and can cause death from starvation, as their stomachs are clogged with debris. It makes you appreciate our impact on the oceans and the dire need for a shift in our plastic use and disposal.

plastic on beach — *Can you spot the 6 plastic bottles just in this one picture?*

Aside from the trash, the beach held other treasures and the walk in the fresh air and sunshine was greatly appreciated.

Mermaid's purse — *An empty egg case for a Skate, also known as a Mermaid’s Purse.*

algae on shore — *Beautiful colors of red, green and brown algae decorate the rocky shore.*

I did have an interesting case of what the seasoned crew calls “dock rock.” This is when you are used to the motion of the sea and everything on land seems to be moving like the ocean. It didn’t make me land sick but it did throw me off a bit. I wonder how long I will sway when I return!

R/V Tiglax — *A view of our current home, R/V* Tiglax *from the shore.*

We boarded the ship in time for another fabulous dinner and prepared to head back out to the Seward line for another night of sampling.

Did You Know?

Dr. Thomas C. Royer is a physical oceanographer who was the first to begin water sampling along the GAK (Seward) line almost 40 years ago. His research led to the discovery of significant coast currents in the Northern Gulf of Alaska that are driven by freshwater input. It was this knowledge of coastal currents that assisted with the prediction of oil spill trajectories during the Exxon Valdez oil spill. His groundbreaking work was the start of the Long Term Ecological Research study that I am assisting with today!

September 19, 2019September 19, 2019

Cara Nelson: Report from the Flying Bridge, September 16, 2019

NOAA Teacher at Sea

Cara Nelson

Aboard USFWS R/V Tiglax

September 11-25, 2019

Mission: Northern Gulf of Alaska Long-Term Ecological Research project

Geographic Area of Cruise: Northern Gulf of Alaska – currently sampling along the Seward line.

Date: September 16, 2019

Weather Data from the Bridge:

Time: 16:10
Latitude: 59º36.465’
Longitude: 149º14.346’
Wind: North 12 knots
Air Temperature: 16ºC (61ºF)
Air Pressure: 1001 millibars
Clear skies

Science and Technology Log

The Long-Term Ecological Research (LTER) study focuses on ecosystem dynamics in the Northern Gulf of Alaska (NGA) and how the complex processes of abiotic factors, such as ocean salinity, temperature, currents, and trace metals influence primary productivity of phytoplankton. The project examines how efficiently this energy is transferred, in turn, to higher trophic levels, from zooplankton to vertebrates, such as fish, seabirds and marine mammals.

Over the past twenty years, seabird and marine mammal observations have been an important component of the LTER study. Approximately 50 species of birds inhabit the NGA either year-round or seasonally, with a variety of foraging behaviors and diets. Through the LTER, we can learn about how physical and biological oceanographic processes influence the distribution and abundance of higher trophic levels, such as seabirds.

Dr. Kathy Kuletz with the U.S. Fish and Wildlife Service (USFWS) is the lead scientist for the seabird part of the research program. Dan Cushing is the seabird and marine mammal observer aboard R/V Tiglax. He holds a master’s degree in wildlife science and has a wealth of experience in birding both on and offshore. This fall cruise marks Dan’s eleventh cruise observing in the NGA. Whenever the R/V Tiglax is underway, Dan can be found on the flying bridge collecting data.

Observations are made using a protocol established through the USFWS. Dan records survey data using a computer on the flying bridge that records both time and GPS coordinates of each bird or mammal sighting.

Dan on flying bridge — *Dan actively observing on the flying bridge.*

estimating distance — A chopstick with markings on it helps Dan estimate bird distance. Dan made this simple distance measuring tool using high-school trigonometry. When the top of the stick is placed on the horizon, the markings along the stick correspond to distances from the boat.

observing laptop — *Dan is able to quickly document the species seen, abundance and any special notes using the computer program.*

It is immediately clear that bird sightings along the LTER follow a pattern. Inshore, diving bird species are common, such as common murres, puffins and cormorants. Pelagic bird species inhabiting deeper waters are mostly surface-feeders, and rely on processes such as fronts and upwellings at the shelf break to concentrate prey at the surface where feeding occurs. Albatross, shearwaters and storm-petrels are abundant as we head further out on our sampling lines.

birds on the dock — *Pelagic cormorants and black-legged kittiwakes sit on the dock in Seward prior to our departure.*

*A black-footed albatross. Photo credit: Dan Cushing*

Dan’s experience on the LTER study is helpful in that he can comment on both changes he sees from the spring, summer and fall cruises but also over the past several years. For example, in winter 2015-16, a large die-off event of common murres was observed in Alaska following an extreme warming event called “the blob” in the North Pacific. The murre die off was due to starvation from lack of forage fish availability. A question of the LTER study is how is the ocean chemistry, primary production, and zooplankton abundance tied to events such as this. Today, the murre numbers have not completely rebounded in the NGA and other species, such as the short-tailed shearwater are beginning to experience die-offs in the Bristol Bay area. In addition to shifts in bird populations, fish that frequent warmer waters, have been observed in the NGA, such as the ocean sunfish. Dan spotted one on this trip along our Middleton line swimming at the surface near a flock of albatross.

The fall survey is occurring when birds are preparing for harsh winter conditions or long migrations. We have spotted a few birds already changing to a winter plumage, which can make identification that much more challenging. As the strong September storms hit us, it is amazing to watch the birds handle the strong winds and driving rain. Last night as we worked on our nightly plankton tow a gale blew up around us. The winds picked up to 30 knots and the seas began to build to 10 feet, and the aptly named storm-petrels kept us entertained. At one point, we turned around and one had accidently gotten to close and seemingly stunned itself by hitting the back deck. We watched as it shook off the confusion and again took flight into the storm.

*A fork-tailed storm petrel. Photo credit: Dan Cushing*

One of the exciting things about Dan’s job and my time observing with him was the sightings of rare and endangered species. Just off of Cape Cleare, as I sat on the flying bridge with Dan, I heard him exclaim, “no way!” as he grabbed his camera for some shots. After a few quiet moments, he shared that he had officially has his first sighting a Manx shearwater. The Manx shearwater has a primary range in the Atlantic Ocean, with rare but regular (1-2 per year) sightings in the NGA. There currently are no confirmed breeding locations identified in the Pacific Ocean. Every new sighting adds to our limited understanding of this small and mysterious population. Another exciting observation, although more frequent for Dan, was the short-tailed albatross. This beautiful bird, with its bubble-gum pink bill, is currently critically endangered, with a global population of only about 4000. The good news is that the population is currently rebounding from extremely low numbers.

*A short-tailed albatross. Picture credit: Dan Cushing*

Dan has not only done an amazing job as an observer but also as a teacher. He has helped me identify the birds as we see them and given me tips on how to hone in on particular species. In addition to this, he has supplied me with amazing facts about so many of the species, I am in awe of his knowledge, patience and his skill as a seabird and mammal observer.

Cara observing — *I am getting better at identifying northern fulmars on a beautiful evening on the flying bridge.*

Personal Log

One of the biggest questions I had (as well as my students) prior to my trip, was how would I handle sea sickness. I must say for a person who used to get sea sick snorkeling, I am thrilled to announce that I am sea sickness free. After riding through three strong gales with 12+ seas and 35-40 knot winds without any major problems, I think I’m in the clear. I owe a lot of it to consistent Bonine consumption!

Additionally, I would say I officially have my sea legs on. I have gotten really good at working, walking, eating, typing, and my brushing my teeth in high seas as the boat tosses about. One of my favorite phrases is when Captain John says, “the seas are going to get a bit snappy.” I asked him what he meant by this and he explained that snappy means the waves are sharp and about 8-12 feet in height in contrast to the swells. They hit the ship with a snap that causes it to vibrate, rather than just allowing it to slowly roll over them.

A last thing that has surprised me on this trip so far is the warm weather. I am typically always cold and was worried about how I would manage working outside on the nightshift in the elements. The weather, despite intermittent storms has remained surprisingly warm and with our mustang suits and rain gear, we have remained mostly dry. Almost daily we have had the pleasure of a beautiful ocean sunset, a full moon rising and stars over our heads. Now we are just crossing our fingers for some northern lights to grace our presence.

*Another sunset over the Northern Gulf of Alaska!*

Animals Seen from the Flying Bridge

Mammals:

Fin whale
Humpback whale
Dall’s porpoise
Harbor porpoise
Stellar sea lion
Harbor seal
Sea otter

Birds:

Greater scaup
White-winged scoter
Sandhill crane
Red-necked phalarope
Red phalarope
South polar skua
Pomarine jaeger
Parasitic jaeger
Commone murre
Thick-billed murre
Pigeon guillemot
Marbled murrelet
Ancient murrelet
Parakeet auklet
Horned puffin
Tufted puffin
Black-legged kittiwake
Mew gull
Herring gull
Glaucous-winged gull
Arctic tern
Pacific loon
Common loon
Laysan albatross
Black-footed albatross
Short-tailed albatross
Fork-tailed storm-petrel
Northern fulmar
Buller’s shearwater
Short-tailed shearwater
Sooty shearwater
Flesh-footed shearwater
Manx shearwater
Red-footed booby
Double-crested cormorant
Red-faced cormorant
Pelagic cormorant
Great blue heron
Northern harrier
Bald eagle
Merlin

September 17, 2019

Cara Nelson: Methot Madness, September 14, 2019

NOAA Teacher at Sea

Cara Nelson

Aboard USFWS R/V Tiglax

September 11-25, 2019

Mission: Northern Gulf of Alaska Long-Term Ecological Research project

Geographic Area of Cruise: Northern Gulf of Alaska – currently sampling in Prince William Sound

Date: September 14, 2019

Weather Data from the Bridge:

Time: 16:10
Latitude: 59º19.670’
Longitude: 146º07.196’
Wind: East 5 knots
Air Temperature: 14.5ºC (58ºF)
Air Pressure: 1010 millibars
Clear skies

Science and Technology Log

A Methot net is not your typical plankton net. This large net hooks to a stainless-steel frame and has a mesh size of 3mm. Its purpose: large jellyfish collection! The Methot is unique not only for its size but also in its method of deployment. The net must be craned off the starboard (right side) of the ship and submerged just under the water. It is then towed for 20 minutes at the surface. Similar to the smaller plankton nets, there is a “cod-end” bucket that helps collect the jellies as the water filters out of the net.

Methot net setup — *Heidi working to tighten the shackles on one setup for the Methot net.*

The setup of the Methot is tricky. The frame that we are using was fabricated locally for these nets so there isn’t a manual for setup and a lot if trial and error is involved in the setup process. This entails a lot of wrenching on shackles to connect the net to the frame, trying out a setup and then trying again once it is in place and we can watch the positioning and motion of the net in the water. Fortunately, we have an amazingly positive team so we were able to meet each challenge and come up with a solution. Our fourth time in resetting the net seems to be the charm.

lowering Methot net — *The Methot being craned into the water.*

Methot fully extended — *The Methot looks like a giant wind sock when it is fully extended in tow next to the ship.*

Heidi Islas is our onboard jellyfish guru. I have never met anyone who loves jellyfish more than Heidi, and this passion and enthusiasm translates directly toward her commitment to her research. She is currently working on her master’s degree at UAF with Russ Hopcroft as her advisor. Her specific research thesis is, “the abundance and distribution of gelatinous zooplankton in the Northern Gulf of Alaska (NGA).” Currently there is no baseline data on the type and biomass of the large jellies in the NGA so Heidi’s work is so important in helping identify not only what is present but how these jellies may be playing a role in this ecosystem particularly as predators on small fish.

Heidi and codend — Heidi is about to open the cod-end where the jellies are trapped at the end of the net. A few of our samples were so full the jellies were up into the net and we needed the assistance of the crane to lift it back onboard.

jelly collection — *One of our first collections had only a few but a nice variety of jellies: 2 Lion’s Mane, 1 albino Lion’s Mane, 1 Sea Nettle and 1 Crystal jelly.*

Our typical sampling includes running either a Bongo net or Multinet off the stern (back) of the boat to collect zooplankton, and then immediately following we lower the Methot net for its 20-minute tow. One of the deckhands, either Dave or Jen, run the crane for us, while the four of us help move and position the net into and out of the water. At the end of the tow, we hose down the net and then open the cod-end to see what we have collected. Our first few tows had only a few jellies but a little more variety. Last night however, as we moved into deeper water south of Middleton island, we had a large number of jellies to process. We assist Heidi in measuring the diameter of bells of the jellies, as well as collecting volume and mass measurements. We then preserve any zooplankton and fish we collect for analysis by fisheries scientists back in the lab.

measuring jellies — *Emily assists Heidi in measuring and massing the jellies.*

Heidi and Cara and jelly — *Even though it is 3am, Heidi and I are pretty excited about our sample of Crystal jellies.*

Many people might ask, why should we care about the jellyfish? It all comes back to the food web connectivity. For example, it is known that jellies will feed on smaller zooplankton, such as copepods and euphausiids (krill), but also on fish larvae, such as pollock. The commercial pollock fishery is very interested in identifying any factor that may impact the adult pollock numbers. Additionally, very little is known about what else the jellies are eating, or in what quantity. So many questions arise about how these jellies might be impacted food availability for other species as well as serving as a food source themselves.

Russ and worm — *Russ examines a polychaete worm that was part of our sample.*

Another very interesting piece of research for Heidi apart from her thesis focus is how are jellies responding to climate change. A current hypothesis was that jellies increase in number during warming events, suggesting that they may become more abundant as our climate changes with even greater impact other species. In her research on this topic, Heidi came across a paper published in 2013 that challenges this hypothesis. It demonstrated that jellyfish actually follow a natural cycle of growth and decline with a peak in abundance every 19 years. Heidi decided to analyze data that NOAA Fisheries had collected over a 38-year period from bottom trawls in the NGA. She too saw the same cycle emerge. Although this is exciting data, it leads to many more questions for her to explore. Such as what is driving this cyclic pattern?

giant sea nettle jelly — *Emily holds a giant Sea Nettle that actually got trapped in our Bongo net. We measured it before sending it back to sea.*

In both the scientific and non-scientific world it is easy to see a correlation of cause and effect and jump to a conclusion. What I am realizing from the research going on aboard R/V Tiglax is that numerous variables must be considered before true causes can be determined from the data. This is why collaboration in research is so important. Physical, chemical and biological oceanographers along with fisheries biologists must work together to gain more holistic view of this NGA ecosystem to help unravel its secrets.

Personal Log

Fortitude is my word for the past few days. I have learned so much on this trip so far, including two important pieces of information about myself. One is that my body does not like to work nights. The days are blurring together for me as I adjust to my shift work. I can say that it is definitely not an easy transition because the transition requires more than just adjusting sleep times, but also eating patterns as well. On Friday night, due to the nature of our stations, we were not able to start our shift work until 1am. By 5:30 in the morning as we began our last sample, I literally fell asleep on the rales of the ship waiting for our Bongo net to surface. I think in another day or two, I will have it figured out.

A second piece of information I learned about myself, I am allergic to the scopolamine patch! Early on Friday, I realized I was developing a rash, which soon spread. The itching was becoming a problem and so I immediately discontinued an antibiotic I was taking thinking it was the culprit. After the rash worsened, I then realized it was likely the patch. After speaking with Captain John, he confirmed that this is a nasty side effect for some people. I removed the patch Saturday and transitioned back to my usual medicine for motion sickness prevention: Bonine. Unfortunately, 24 hours later, the rash and itching persists. Russ and John joke that they will be taping my fingers soon, so I better behave.

After the first storm passed we were lucky enough to have several days of beautiful and surprisingly warm weather as we started along the Middleton line. I was able to spend time on the fly bridge with Dan birding and mammal monitoring. I will definitely highlight more on this in a later blog. From Friday to Saturday I was fortunate enough to watch both amazing sunsets and sunrises as well as enjoy the beauty of the full moon.

Another storm is forecast to be upon us by late Sunday evening, so our plan is to finish the Middleton line tonight and be in transit to GAK1 (just outside of Resurrection Bay) overnight. Currently it is calling for East 40 knot winds and 11-13 foot seas. It should be a fun ride.

Did You Know?

The jellies we are sampling all started out in the benthic (bottom) habitat in what is known as a polyp stage of their life cycle. These polyps are attached to the bottom and will asexually bud off into the water column. At this point, the jellies are only approximately a half of a centimeter in size. It is estimated that it takes approximately a year for the jellies to grow to the full adult medusa stage. The medusa is the bell-shaped, free floating stage that everyone recognizes as a jellyfish. This amount of growth requires a lot of energy input, and thus these jellies must feed continuously to reach the adult sizes. It is not known for sure, but it is estimated that the jellies will spend approximately a year in this phase in which they sexually reproduce. The larva will then settle back to the benthic environment and start the cycle all over again.

September 13, 2019

Cara Nelson, The Gales of September, September 12, 2019

NOAA Teacher at Sea

Cara Nelson

Aboard USFWS R/V Tiglax

September 11-25, 2019

Mission: Northern Gulf of Alaska Long-Term Ecological Research project

Geographic Area of Cruise: Northern Gulf of Alaska – currently sampling in Prince William Sound

Date: September 12, 2019

Weather Data from the Bridge:

Time: 0830
Latitude: 60º16.073’ N
Longitude: 147º59.608’W
Wind: East, 10 knots – building to 30
Air Temperature: 13ºC (55ºF)
Air Pressure: 1003 millibars
Cloudy, light drizzle

Science and Technology Log

There is a tool for every job and the same holds true for sampling plankton and water in the Northern Gulf of Alaska (NGA). As we sorted, shuffled and assembled equipment yesterday, what struck me the most was the variety of nets and other equipment needed for the different science research being performed as part of the LTER program.

There are a variety of research disciplines comprising the LTER scientific team aboard the R/V Tiglax, each with their own equipment and need for laboratory space. These disciplines include physical oceanography, biological (phytoplankton and zooplankton), and chemical oceanography along with marine birds and mammal. Their equipment has been transported from University of Alaska Fairbanks, as well as Western Washington University to the remote town of Seward AK and subsequently transferred to the ship before it could be either set up or stored away in the hold for later use. Logistics is an important part of any research mission.

Immediately, it was obvious that some of the primary equipment on the ship, used for almost all the water sampling and plankton tows, require frequent maintenance in order to maintain function. The winch for instance needed rewiring at port before we could depart. Winch runs the smart wire cable that allows the scientists to talk real time to the equipment (e.g., CTD and MultiNet).

The deck full of boxes being unpacked and stored away, as well as the winch pulled apart for rewiring

One of the most complex pieces of equipment and the workhorse of all oceanographic cruises, the CTD, takes a good deal of time to set up as well properly interface with the computers in the lab for real-time data communication. A CTD, which stands for conductivity, temperature and depth, is a piece of equipment that accurately measures the salinity and water temperature at different depths. The CTD is actually only a small portion of the device shown below.

CTD prep — The CTD is being put together and wired before departure.

CTD output — Temperature (blue line) salinity (red line) and fluorescence (chlorophyll) are transmitted and graphed on the computer as the CTD is lowered and raised.

The main gray bottles visible in a ring around the top are called Niskin bottles. These bottles are used to collect water samples and can be fired from the lab computer to close and seal water in at the desired depth. These water samples are used by the team to examine both chlorophyll (abundance of phytoplankton) as well as nutrients. As a side note, if these bottles are not reopened when the CTD is sent back down the pressure can cause the bottles to implode. Two bottles were lost this way at our second station this morning, luckily spares were available onboard!

Broken bottle
Shattered bottle

One bottle shattered from the pressure (on the right) and in the process, broke the neighboring bottle.

On the bottom of the CTD, there are several important sensors. One is for nitrates and another for dissolved oxygen. Additionally, there is a laser that detects particle size in the water, aiding in identifying plankton. Much of this data is being fed to the computers but will not be analyzed until the scientists return the lab at the end of the cruise.

A big decision had to be made before departing Seward late in the evening on the 11^th. A gale warning is in effect for the NGA with 30+ knot winds and high seas. After several meetings between the chief scientists and the captain, it was determined to forego the typical sampling along GAK1 and the Seward line and head immediately to Prince William Sound (PWS) to escape the brunt of the storm.

After getting underway late in the evening on Wednesday, the 11^th, we stopped at a station called Res 2.5 in Resurrection Bay. This station is used to test the CTD before heading out. Just as with any complicated equipment it takes time to work out the glitches. For example, it is imperative to have the CTD lower and raise at a particular rate of speed for consistent results and speed and depth sensor were not initially reading correctly. Additionally, the winch continued to give a little trouble until all the kinks were worked out close to midnight. With a night focused on transiting to PWS, sampling was put on hold until this morning.

Personal Log

There are three F’s to remember when working aboard a NOAA research vessel: Flexibility, Fortitude and Following orders. Flexibility was the word for everyone to focus on the first day. I was immediately impressed with how everyone was able to adjust schedules based on equipment issues, coordination with other researchers on equipment loading and storage and most of all the weather.

Yesterday, there was help needed everywhere, so I was able to lend a hand with the moving and sorting and eventually assembly of some of our equipment. The weather was beautiful in Seward as we worked in the sunshine on the deck, knowing that a gale was brewing and would follow us on our exit from Resurrection Bay. Helping put together the variety of nets we are going to be able to use during our night shift, gave me time to ask our team a lot of questions. I am amazed at how open and willing the entire team is to teach me every step of the way. I am feverishly taking notes and pictures to take it all in.

Orientation and safety are also a big part of the first day on a new ship. Dan, the first mate, gave us a rundown of the rules and regulations for R/V Tiglax along with a tour of the ship. We ended on the deck with a practice drill and getting into our survival suits in case of a ship evacuation.

survival suit practice — The new crew practices with their survival suits: Emily, Jake, Kira and Cara

Cara in survival suit — Although it has been a few years, I was able to don my survival suit pretty quickly.

Adjusting to a night time schedule will be one of my greatest challenges. Usually we work the first night but we had a break due to the weather so we were able to put off our first nighttime sampling until Thursday night. Everyone on the night crew has a different technique to adjust their body clock. My plan was to stay up as late as possible and then rise early. Last night however, between the ship noise and the rocking back & forth in the high seas during our transit from Seward to Knight Island passage, I did not sleep well. Hopefully this will inspire a nap so I can wake refreshed for our first night shift.

When I awoke this morning at 06:00, we had entered the sheltered waters of Knight Island passage. with calm seas and a light drizzle, ready to start a full day of collection. I was able to watch the first plankton tows with the CalVet for the daytime zooplankton team with Kira Monell and Russ Hopcroft. Additionally, I made my rounds up to the fly bridge where Dan Cushing monitors for seabirds and mammals while we are underway. I will share details of these experiences in the coming days.

For now, it is time for lunch and my power nap.

Did You Know:

There are a wide variety of plankton sampling nets each with a unique design to capture the desired type and size of plankton. To name a few we will be using: Bongo nets, Mutlinets (for vertical and horizontal towing), Methot trawl nets, and CalVet nets. As I get to assist with each one of these nets, I will highlight them in my blog to give you a better idea what they look like and how they work.