Week one
of Marine Field Studies was awesome! It exceeded all of my expectations. I am
very happy that I was able to participate and learn about what happens in our
oceans. The week began with soundscapes of the Saint John’s River and ended
with trudging through mangroves.
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Me listening to soundscapes with Carissa King on the St. John's River. |
Monday
morning we headed to the Saint John’s River and listen to anthropogenic and
natural soundscapes. Carissa King gave an amazing lecture on how anthropogenic
sounds can affect dolphin behaviors in the Saint John’s River. Many of the
sounds downriver were blocked out by the sounds of boat motors and snapping
shrimp (Alpheidae). We were lucky
enough to record the sound of an oyster toadfish (Opsanus tau) where anthropogenic sounds were more limited. While
working our way back downriver I was lucky enough to spot a female bottled
nosed dolphin (Tursiops) being
escorted by two males. While waiting to listen to the sounds in each quadrant
of the river we tested the water quality using a YSI meter. This meter is used
to test dissolved oxygen, salinity, and the temperature. The Van Dorn sampler
was used to test the water’s turbidity and chlorophyll-a levels.
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Everyone enjoyed finding marine life in the coquina rocks. |
On
Tuesday morning we headed down to the beach to observe tide pools, scrub
habitats, and inlets. I thoroughly enjoyed searching for and learning about the
marine organisms that find refuge in the tide pools at Marine Land. It was probably one of my favorite days! While at
the beach I found sea snails, blue crabs (Callinectes
sapidus), and anemones . As we worked our way back up the coast we learned
about how wave action, wind, and man-made objects can affect our sandy beaches.
The day ended with a gorgeous view from the viewpoint that overlooked the beach
and a mangrove forest.
On
Wednesday morning I hopped on a boat and headed over to Tolomato to long line
for scalloped hammerhead sharks (Sphyrna
lewini). After baiting the hooks with Boston mackerel we attached the long
line to a buoy and began to attach the bait. After catching, measuring, and fin
sampling a juvenile scalloped hammerhead we released it. Following that catch
we pulled in two catfish. To end the day we seined in a salt marsh. While
seining we caught hundreds of juvenile herring (Clupea spp.) and anchovies (Anhoa
mitchilli). Some of the other catches included juvenile inshore lizard fish
(Synodus foetens) and silversides (Menidia spp.).
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I enjoyed being able to help catch the fish using the siene! |
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Image of the mangrove forest Wednesday Morning. |
To
complete our week at UNF we trudged through a muddy mangrove forest. As we
worked our way closer to the water, the vegetation became thicker and the
number of black mangroves (Avicennia
germinans) increased significantly. We took measurements of the diameter of
the base of the mangrove, the height, and the canopy width. This was done to
measure the rate at which the mangroves have been growing over the years.
Overall,
the UNF experience was amazing! I enjoyed the variety of research provided by
the school. It kept things very interesting! I loved all of the opportunities I
was given, and I hope to be given even more during my week at the Keys Marine Lab!
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