Jennifer Fry, July 17, 2009

NOAA Teacher at Sea
Jennifer Fry
Onboard NOAA Ship Miller Freeman (tracker)
July 14 – 29, 2009 

Mission: 2009 United States/Canada Pacific Hake Acoustic Survey
Geographical area of cruise: North Pacific Ocean from Monterey, CA to British Columbia, CA.
Date: July 17, 2009

Hake are unloaded into holding containers, soon to be weighed and measured

Hake are unloaded into holding containers, soon to be weighed and measured

Weather Data from the Bridge 
Wind speed: 20 knots
Wind direction: 340°from the north- north west
Visibility: foggy
Temperature: 15.2°C (dry bulb); 13.0°C (wet bulb)

Science and Technology Log 

Each day I observe the NOAA scientists using the scientific process.  These are the same process skills we learn in the classroom. The scientists determine what they want to find out and state it in a question form. These are some of the questions/hypotheses that they are trying to answer.

  • What and where are the populations of hake?
  • In what environments do the hake best thrive?
  • When do they migrate?
  • What do they feed on?
  • What feeds on the hake?

Once the hake are observed on the sonar, the trawl net is dropped into the water.  The fish are hauled out onto the deck where they are emptied into huge holding bins.  Scientists want a good sampling of hake for the survey, not too much and not too little.  Getting a good sample is important to the scientists; both for their research and the environment.  The scientists don’t want to take too many hake each time they fish, doing this might diminish the hake population. 

Collecting Data: Observing – Using the senses to collect information.

Classifying – Sorting or ordering objects or ideas into groups or categories based on their properties.

Measuring – Determining dimensions (length/area), volume, mass/weight, or time of objects or events by using instruments that measure these properties.

Otoliths—fish ear bones—are extracted and placed in vials (test tubes) for later study.

Otoliths—fish ear bones—are extracted and placed in vials (test tubes) for later study.

The scientists then collect their data. Fish are separated by species or classified.  All hake collected are then weighed. A certain number of them are measured in length, and their sex is determined.  Scientists observe; dissect a group of hake, and collect the fish’s ear bones, called the otoliths, (2 white oval shapes pictured above). Otoliths are stored in small vials, which are like test tubes, for later study. The test tube has a serial number which is fed into a computer as well. Later, scientists will observe the otoliths under a microscope.  The otolith helps determine the age of the fish. When observed under a microscope, the otolith, or ear bone has rings similar to rings of a tree. The more rings, the older the fish.  The age of the fish or data is then recorded in a computer spreadsheet.

Communicating – Using pictorial, written, or oral language to describe an event, action, or object.

Making Models – Making a pictorial, written or physical representation to explain an idea, event, or object.

Recording Data Writing down the results of an observation of an object or event using pictures, words, or numbers.

As data is collected, it is recorded into a computer database, then scientists create tables and graphs from information in this database.

Inferring  – Making statements about an observation that provide a reasonable explanation.

Predicting – Guessing what the outcome of an event will be based on observations and, usually, prior knowledge of similar events.

Interpreting Data – Creating or using tables, graphs, or diagrams to organize and explain information.

The otoliths look like small oval “winglike” structures.

The otoliths look like small oval “winglike” structures.

Once all the data is in the computer, scientists can analyze or figure out the answers to these questions.

  • What and where are the populations of hake?
  • In what environments do the hake best thrive?
  • When do they migrate?
  • What do they feed on?
  • What feeds on the hake?

Scientists use the data to infer or make a statement about the data that gives a reasonable explanation.  Scientists also make predictions by guessing what the outcome might be based on the data/observations.

Marine Mammal Watch – NOAA Fisheries instructs the scientists to conduct a “marine mammal watch” prior to a fishing trawl. This is to protect the marine mammals, such as dolphins, whales, sea lions, and seals.  When the nets go into the ocean, the curious sea lions want to see what’s going on and play around the nets.  This can prove dangerous for the animals because if they get tangled in the net, they cannot come up for air, and being mammals, they need air.  As it happened, a half a dozen sea lions were spotted around our trawl net. To protect the inquisitive animals we found another spot in which to put our net.

California sea lion

California sea lion

Personal Log 

Everyone aboard the Miller Freeman is a team.  It’s an amazing working environment.  The ship runs like a well oiled machine.  The crew is always so helpful and are dedicated to their work.  The scientists are incredibly dedicated to their specific field and are committed to helping the world and the ocean’s biome. Everyone is so patient with all my questions.  I am so grateful and honored to be part of this hake survey which is so scientifically important in determining the health of our ocean.

Animals Seen Today 
California sea lions
Hake Myctophidae: lantern fish

Marilyn Frydrych, September 24, 2008

NOAA Teacher at Sea
Marilyn Frydrych
Onboard NOAA Ship Delaware II
September 15-25, 2008

Mission: Atlantic Herring Hydroacoustic Survey
Geographical area of cruise: New England Coastal Waters
Date: September 24, 2008

Weather Data from the Bridge 
41.27 degrees N, 70.19 degrees W
Partly Cloudy with winds out of the W at 19 knots
Dry Bulb Temperature: 26.0 degrees Celsius
Wet Bulb Temperature:  20.9 degrees Celsius
Waves: 2 feet
Visibility:  10 miles
Sea Surface Temperature:  21.6 degrees Celsius

Science and Technology Log 

Marie Martin, the bird watcher, came rushing down from her perch on the flying bridge in the early afternoon announcing that she had just spotted a humpback whale close by.  We all rushed here and there to get a view. I went up to the bow and looked for about 10 minutes.  As I came back through the bridge LT(jg) Mark Frydrych, the OOD (Officer of the Deck), and Marie were talking about a right whale entangled in a net.  Mark called the captain seeking his advice.  Whenever a situation like this is observed the captain is expected to report it.  The captain told Mark to report it and let the trained people steam out to try to find it.  I interjected that I never did spot the pilot whale. Everyone said, “What pilot whale?”  Mark said he saw a right whale. Marie piped up that she had said it was a humpback whale.  Then I remembered that indeed she had said humpback whale.  At that point the whole thing was moot because the humpbacks are not endangered. Then we asked Mike, the chief scientist, what would happen if a right whale got caught in his net. He said he didn’t want to think about it.  When a sturgeon got caught he said he had two weeks of doing nothing but filling out forms.  If a right whale got caught he would probably have 2 months of paperwork.