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Sampling for larvae

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Hi all,

Today is our last day of sampling. We started bright and early again at 6am. It rained a bit, but it was accompanied by a full rainbow arching over the boat. Nice way to start off the morning!

You guys are probably wondering how we collect all of the larval fish I showed you on the last blog post. Well, we deploy a bongo net off the back of the boat and a neuston net off the side. Both nets are brought on board and the samples are washed down into the codends. The contents of the codends are rinsed/poured and put into our sample jars. The samples are brought into the wet lab for a closer look and a potential photo. Some of the larger specimens (e.g., tunas, swordfish) are frozen for genetic analyses.

I set up a GoPro around the boat to show you guys how we sample at each station. Let’s take a look of some of our scientists at work:

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Bongo nets and the sunset last night.                        Neuston net.

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Rich is collecting water for the YSI and for the food web study.                 Nina is reading the water's temperature, salinity, and dissolved oxygen.

 

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Rich, Nina, Jillian, and Jason are retrieving the bongo nets.  
                     Everyone's rinsing down the nets, while Michelle is recording the
                                                                                                          flowmeter data.

 

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Jillian is pouring her plankton sample out of the codend.                           Jason and Nina are rinsing the bongo nets.

 

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Nina and Jessica are putting the sample into the jar.                                Jessica is looking at a larval tuna under the microscope/taking a picture.

 

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Alex and Cori just retrieved the neuston net.                                           Jillian, Alex, Cori, and Travis are sorting the neuston net sample.

 

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Jason and Travis sorting through Sargassum.                                          Jason and Alex looking at our catch!

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Dr. Michelle Sluis is the PI on the cruise. She is recording the data for each tow (e.g., start time, location, etc.) in the pictures above.

Hope you enjoyed the pictures!
-Nina

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Guest Monday, 20 November 2017