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Bimini 2012

Since 2001, DCP has been studying a group of Atlantic spotted dolphins (Stenella frontalis) in the waters around Bimini, a small Bahamian island along the Great Bahama Bank. Each field season has been extremely successful and, as we continue to collaborate with Bill & Nowdla Keefe's Wild Dolphin Adventures and Bimini Adventures, we now have over 90 individual dolphins in our Photo-ID catalog. In 2006, we also began systematic documentation of the common bottlenose dolphins (Tursiops truncatus) in the area. That fledgling Photo-ID catalog as 38 individuals and we look forward to adding more!

The purpose of DCP’s research here is to analyze the group dynamics of dolphins found on the Great Bahama Bank, north of Bimini. Identification of individual dolphins and examination of their association patterns provides details and insight into their social structure and behavior. We will continue to examine if any of the identified dolphins match those individuals observed farther north, along the White Sand Ridge. To read more background information, click here .

The 2012 Bimini field season is once again being conducted by DCP Research Associate Kelly Sweeting . This will be Kel's tenth summer season in Bimini, and she continues to be there year-round, in hopes of collecting more non-summer data. As always, we are extremely excited about this year’s research. We look forward to the students who will join us and all of the dolphin swim guests we'll meet along the way.

Kel will be keeping folks around the world up to date on the research by posting regular field reports. Click on a posting below to see what we (and the dolphins) have been up to! Click on the links below for information on how you can support DCP's Bimini research program:

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Bottlenose and Spotteds and Remoras, Oh My!

Pam & Liana headed out Sunday with Bimini Undersea and their 12 guests, 8 of whom were on earlier trips and eager to see dolphins. It was a clear, beautiful day, eventually reaching glassy-calm surface conditions that allowed us to see straight to the bottom even in depths of 40 feet! We saw some interesting new marine life including a sea turtle, a triggerfish, a cushion star, flying fish, and a barracuda. But it was dolphins we were really after. Soon, we saw at least 11 bottlenose dolphins, including at least one calf. They stayed with the boat for almost twenty-five minutes, bow riding and giving the guests quite a show. We were able to get in the water with them as well. But soon other boats approached, and we decided to give them their space and head off in search of spotted dolphins. Pam was ready to get out anyway because as soon as she hopped in the water, the remoras found her!

We sailed on and we spotted (ha!) what we were looking for - spotted dolphins on the horizon. We excitedly increased the initial count from 5-6 to our final count of 7-10, with two mother-calf pairs. The group was very active, we were able to get in the water with them twice. There was a lot of contact between the dolphins in the water and they formed a tight group of about 5 that stayed very close together. Eventually, these last of the dolphins lost interest and we returned to the boat.

As we again observed the dolphins from the boat, one played with a fish in its mouth! This second encounter was shorter and the dolphins seemed more focused on each other; we saw quite a bit of pectoral contact and touching between the dolphins, including some belly-to-belly swimming. We know Milo (ID#96) was there and hope to ID some more from our still photos!

As we headed back, we reflected on our trip. We couldn't have asked for much more -- perfect viewing conditions, bottlenose dolphins, spotted dolphins, some interesting marine life, and a great group of guests!  Though perhaps maybe Pam could have done without the remoras!

Meanwhile, Kel headed out with Bimini Adventures. This group of humans was equally excited about theBIM12_T37_TtMC great weather and eager to see dolphins. The first dolphins we saw were also bottlenose – a group of at least 25! While Kel was busy taking dorsal fin photographs from the surface, the guests got in and enjoyed great views of the big group. Afterwards, we continued to watch them from the boat, all the while keeping our eyes out for spotteds. Eventually we opted to say farewell to this group and go test our luck in different waters. Apparently, it was destined to be a bottlenose day for this boat though – we eventually found more! Analysis of the still photographs will allow us to determine if in fact some of these 11 bottlenose were also in the earlier group of 25. After collecting more still photographs, Kel hopped in with the MVA and got video of the entire group of 11 cruising past. But, most memorable for the guests was the youngster who repeatedly strayed from mom, practicing its crater feeding and investigating the humans and the MVA! Like Pam & Liana, we were all very happy as we headed back to shore!

We're all optimistic that today is a good indicator of the trips to come!

Until next time,
Liana, Pam & Kel

 
Found some bottlenose, but can we spot some spotted?

BIM12_T35_TtWe set out on “Adventurer” early on Saturday afternoon with a much bigger crowd than yesterday. We had 16 guests onboard, including a family from Switzerland, another family on vacation and some friends of Bimini Undersea. It was a clear day with minimal cloud cover, and the sun was strong. Everyone on the boat seemed optimistic and ready to see some dolphins! At 14:30, Captain Audley saw our first dolphins. It was a group of 4-5 bottlenose that stuck around the boat for almost fifteen minutes. They were on the move but one even came to ride the bow for a bit! We were able to get some good photos of them from the boat as they came up for air. Each time the dolphins disappeared beneath the water's surface, we weren't sure if they had departed for good or not. The guests were thrilled (and so were we), when the familiar dorsal fins resurfaced and we knew they hadn't decided to leave us quite yet.

Finally, though, they did decide it was time to go. We continued further into the "dolphin grounds" to search for more dolphins, but didn't see any more. We were happy to see some familiar bottlenose, and hopefully we'll spot some more spotted dolphins soon!

Until next time,
Liana, Pam & Kel

 
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