Thursday, June 26, 2014

Tuna Gonad Collection Trip to Oregon Inlet, North Carolina



June 14-19, 2014

A week ago today, Gabriel, Danielle, and I arrived home from a successful trip to Oregon Inlet. For those of you that don’t know, Oregon Inlet Fishing Center is the best spot to catch fish on the east coast. In addition to loads of inshore fish, the charters that head out from Oregon Inlet catch huge numbers of offshore fish, 40 miles southeast and closer. The proximity of the continental shelf to the fishing pier makes this a highly desirable, lucrative spot to run a charter boat. 

The three of us headed south because for a few months when spring turns into summer, Oregon Inlet sees limits of yellowfin tuna every single day. A “limit” of yellowfin means 3 fish per angler, or a total of 18 per boat. About 28 boats go out every day depending on the weather and they rarely return to the dock without their limit, so that is a total of 504 yellowfin tuna per day if every boat heads offshore. 

We headed down around dinnertime on Saturday, June 14 to Nags Head, North Carolina. It is only about a 12 hour drive, but given tolls, getting lost in Delaware, and making sure everyone was caffeinated through the night, we were able to check into the hotel around 10:30 on Sunday morning. I called up Fred, our contact in the Fish Cleaning House, as soon as we set our stuff down in the hotel and I got a “ya’ll better get down here or you’re gonna be late! They’re bringin’ in tons of yellowfin already!” Ah, the thick, welcoming, and super-friendly southern accent beckoning us to the dock. It turns out, some of the boats catch their limit within two hours of fishing and head back to the dock early. After nearly zero sleep, the three of us headed down to Oregon Inlet to see what the fuss is all about. 

We pull in, meet Fred, and realize how amazing the setup is down there. Oregon Inlet works like a well oiled machine. The captains put paying customers on the fish, the mates help the anglers catch, and very little blood hits the cockpit. Once they arrive back at the dock, pictures of nearly every fish are taken, and a pickup truck moves fish in Rubbermaid barrels from the dock to the Fish Cleaning House. The Fish Cleaning House is where 6-8 strong men weigh and fillet fish for customers. It may sound easy but when you think about the sheer numbers- (i.e. 4 boats alone bringing in 2000+ lbs of tuna fillets) it is an immense task. The guys are set up very well, with an air conditioned room with stainless steel counters and hoses everywhere. Next to the room where they cut the fish is a huge refrigerated room where they store fish that need to be cut up and fish racks, so there is zero fish stench near the docks or building. 

They let us set up on the back side of the Fish Cleaning House on a deck that is about 12’ by 15’ where we set up a folding table, laid down measuring tape for straight fork length, and had coolers full of ice ready to accept bagged gonads. We were able to weigh, get curved fork length, and remove gonads from some whole fish, but we mainly had access to racks of fish. We only used racks if the spine was 100% intact to get a straight fork length, but we were unable to weigh these fish. Fortunately, when the fish cutters remove the loins, the gut area is left alone and the gonads are unaltered. The first day, on zero sleep, we were able to get about 105 gonad samples. Back at the hotel, we weighed the gonads, gave them a gross maturation stage (i.e. how developed does it look), and cut small slivers to store in neutral buffered formalin for later histological analysis under the microscope. Our initial plan was to obtain 200 samples over the course of the trip, but I brought enough supplies to get 400 gonad samples. 

For the second day, we had arranged with Fred for him to call us and let us know when the first boats came back. Because there were a lot of private boats heading out, Fred thought it would take the charter boats slightly longer to catch their limit. The next morning we woke up, had sweet potato biscuits free at the hotel for breakfast, and headed to mini golf at Mutiny Bay. Even though it was fun and Gabe definitely won, it was super hot in the sun and we were ready to get back to sampling. On the second sampling day, we were able to get 101 samples. That night, we went to Mulligan’s Raw Bar and enjoyed some local seafood and some guy with a guitar out on the deck at night. If you’re curious what he sounded like, this was the guy: https://www.youtube.com/watch?v=_Nhs2ZWHHVM
 
On the third sampling day, we stopped by Bodie Island lighthouse for a few pictures and then drove a bit further south. We headed down to check out Cape Hatteras lighthouse before heading back to Oregon Inlet for the afternoon. It was a priority for the sampling crew and we were only about 45 minutes away. The three of us walked up all 268 steps of the tallest brick lighthouse in the world. It was great! It also happened to be 15 years to the day (June 17) that the lighthouse began being moved from its original location to where it sits now, due to concerns about erosion. 

The third sampling day we were worried that we might not get enough samples for the rest of the trip, due to wind offshore. We made a group decision to get as many samples as we possibly could that day, because we were not sure if we could get any more samples until Friday. That third day, we managed to collect 194 tuna samples!!

After getting almost 400 samples in 3 days (some samples were unusable), we really needed a break. We worked late into the night to weigh and cut up all the samples on Tuesday night, stopping only to scarf down pizza that we had delivered to the hotel. We celebrated the success of getting all of the samples that we possibly could that night by jumping into the ocean around 3:00 in the morning.
Wednesday, Danielle and I were not feeling so great, so we had an easy morning organizing samples, typing up data, cleaning up the mess from sampling, and going for a swim in the beautiful ocean. We were lucky enough to find a cheaper hotel (buy 3 nights get one free special!) that just happened to be on the water. We decided to swing by the aquarium on Roanoke Island to check out the sea otters, sand tiger sharks, puffer fish, and all white alligator. It was awesome! That night we ate at the Sugar Shack and tried some local fish, shrimp, fried green tomatoes, and even soft shell crab! The seafood down in North Carolina is unparalleled. We finished packing that night and hit the road early on Thursday morning. 











All in all a great success! We got more samples than we intended, filled every sample tube we brought with us, learned a ton about yellowfin gonads, and even managed to see a few sights along the way.

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