FOLLOWING DOLPHINS IN THE BAHAMAS…


Following Dolphins (SailorDolphin / BMMRO)

FOLLOWING DOLPHINS IN THE BAHAMAS…

The Bahamas Marine Mammal Research Organisation (BMMRO) is based at Sandy Point, Abaco. The principals Diane Claridge and Charlotte Dunn with their team cover not only Abaco waters but the whole of the Bahamas. Their research work is complex, and some of it is carried out in conjunction with partners on specific projects or more generally.

Following Dolphins (SailorDolphin / BMMRO)

Which brings me to SailorDolphin Research, a project that involves the meticulous mapping, photographing, and recording of the details of each sighting. Much of the work is carried out in the Bahamas in partnership with BMMRO. The link will take you to the homepage, which notes “This website provides a list of Dolphins that I have documented on the US East coast and the Bahamas. It includes details (with photos & notes) for each dolphin and lists of their sightings from my personal database.” If you have an interest in dolphins (and who does not?), it will repay exploration – and you will see some awesome photographs. Here are a few of them to admire. 

Following Dolphins (SailorDolphin / BMMRO)

Now imagine yourself in the water, with these wonderful creatures cutting through the water in front of you, working their sleek bodies just below the surface, jostling and cavorting, occasionally letting a fin cut through the water. Hold that thought… Right, get back to work!

All photos courtesy of SailorDolphin / BMMRO

Following Dolphins (SailorDolphin / BMMRO)

SPERM WHALES TAILING: ABACO, BAHAMAS


Sperm Whale Tailing, Abaco, Bahamas (©BMMRO)

SPERM WHALES TAILING: ABACO, BAHAMAS

There can be very few people in the world whose breath would not be taken away by the sight of a massive sperm whale tailing close by. And as it happens, this very phenomenon can be seen in the deeper waters around the coast of Abaco. Here is a small gallery of photos of sperm whales tailing, taken from the BMMRO research vessel. There’s no point in my writing a lot of commentary to the images – they speak for themselves of the awesome (in its correct sense) power and grace of these huge mammals.

Sperm Whale Tailing, Abaco, Bahamas (©BMMRO) Sperm Whale Tailing, Abaco, Bahamas (©BMMRO)

In these images, you will notice that the whales have distinctive patterns of notches and tears in their flukes (ie tail fins). As with a dolphin’s dorsal fin, these areas of damage are like fingerprints – unique to each individual, and a sure means to identification. The researchers log each sighting and assign a cypher – a whale will become known as ‘B42’ and not usually by a less scientific name like ‘Derek’ or ‘Susie’).

Sperm Whale Tailing, Abaco, Bahamas (©BMMRO) Sperm Whale Tailing, Abaco, Bahamas (©BMMRO)

Q. What happened next?  A. You would see the tail emerge as the whale dives deep… Sperm Whale Tailing, Abaco, Bahamas (©BMMRO)

One of my favourite whale views is of the tail as it rises above the surface with water streaming off the flukes, before it flicks over and disappears beneath the waves. 

Sperm Whale Tailing, Abaco, Bahamas (©BMMRO)

A juvenile takes a dive alongside an adult. One day that tail will be massive…Sperm Whale Tailing, Abaco, Bahamas (©BMMRO)

Credits: all photos © BMMRO, with thanks as ever to Diane and Charlotte

Sperm Whale Tailing, Abaco, Bahamas (©BMMRO)

‘WELL SPOTTED’ (2): ATLANTIC SPOTTED DOLPHINS IN ABACO


Atlantic Spotted Dolphins in Abaco Waters (BMMRO)

‘WELL SPOTTED’ (2): ATLANTIC SPOTTED DOLPHINS IN ABACO

No sooner have I posted about PANTROPICAL SPOTTED DOLPHINS sighted during the current BMMRO whale research program, than the other Bahamas spotted dolphin species shows up as well. These are the more numerous Atlantic Spotteds Stenella frontalis, more confined in range (as the names suggest) than the Pantropicals. 

Atlantic Spotted Dolphins in Abaco Waters (BMMRO)

The BMMRO caption reads “Atlantic spotted dolphins today! Small social group playing with sargassum – they swam past what looked like a plastic mattress cover – one dolphin whacked it with its tail as it swam by…”

Atlantic Spotted Dolphins in Abaco Waters (BMMRO)

Just because it can…Atlantic Spotted Dolphin leaping in Abaco Waters (BMMRO)

RUBBISHING RUBBISH: A RANT

Behold a large plastic bag, made by humans and dumped by humans into a place that is not theirs to use as a trash repository. It will take some 500 years to break down completely. But when people say that they don’t really mean it will have harmlessly disappeared over that period and become salt water. Far rom it. It will just break down into smaller and smaller pieces, to bite-sized bits for turtle, fish and seabirds who will idiotically mistake them for food (duh!), then to micro-plastic that will become part of the evolving plastic soup that will be ingested by tiny sea creatures and coat the reefs in polyethylene gunk. [End of rant. Ed.]

Atlantic Spotted Dolphins in Abaco Waters - marine trash (BMMRO)

Behold an Atlantic Spotted Dolphin giving the bag a passing whack with its tail. It won’t do anything to help with marine pollution, but is shows a robust disdain for a piece of man-made rubbish that has made it into the creature’s home environment.

Atlantic Spotted Dolphins in Abaco Waters - marine trash (BMMRO)

Below is a short GoPro shoot of a pair of ASDs, that I took from the BMMRO research boat last year. Marvel at the grace and elegance of these beautiful animals as they swim just below the surface (wonder, too, at the incompetence of the cameraperson who, to be fair, was leaning over the side of the RHIB with the camera on a stick…)

All photos BMMRO; video from the Rolling Harbour achives, intemperate rant all my own

‘WELL SPOTTED’: PANTROPICAL SPOTTED DOLPHINS IN ABACO


Pan-tropical Spotted Dolphins, Abaco Bahamas (BMMRO)

‘WELL SPOTTED’: PANTROPICAL SPOTTED DOLPHINS IN ABACO

Two species of spotted dolphin are found in Bahamas waters. The most common is the ATLANTIC SPOTTED DOLPHIN Stenella frontalis, a species confined to the Atlantic. Less commonly seen – though with a global range – are Pantropical Spotted Dolphins Stenella attenuata

Pan-tropical Spotted Dolphins, Abaco Bahamas (BMMRO)

The BMMRO research boat is out whale-spotting right now, and the team is finding a good variety of cetacean species, from dolphins right up to SPERM WHALE mother and calves. A couple of days ago, the pantropicals surfaced and these great shots of them were taken.

Pan-tropical Spotted Dolphins, Abaco Bahamas (BMMRO)

The two spotted dolphin species are very similar to the untrained eye. Identification is further complicated by the fact that both species start life without spots and go through stages ranging from no spots at all to completely spotted. These stages are sometimes referred to as ‘two-tone, speckled, mottled, and fused’. The pantropicals are relatively small, reaching lengths up to 7 feet and weighing c250 pounds at adulthood. Their beaks are longer and more slender than the familiar but larger bottlenose dolphin. The beak has a white tip, a useful identifier.

Atlantic Spotted and Pantropical Spotted range maps for comparison

The pantropicals favour shallower water by day, and at night they move to deeper water where they can dive down for food such as squid. Although they are IUCN listed as ‘Least Concern’ and their world-wide numbers are estimated to be abundant, they face the usual man-related threats to the species throughout their range, especially in the Pacific region. As we see time after time, complacency can turn to concern in a very short time.

Pan-tropical Spotted Dolphins, Abaco Bahamas (BMMRO)

THREATS TO THE SPECIES

  • Entanglement in fishing gear – captured as bycatch in the course of commercial fishing
  • Entangled in discarded fishing gear
  • Illegal feeding and harassment – this is a problem in particular locations eg Hawaii
  • Overexposure to and interaction with eager tourists in inshore areas
  • Hunting – these dolphins are prolifically hunted for food in several parts of the world
  • Hunting – they are caught ‘accidentally’ in large numbers in nets set for tuna
  • Persecution in eastern tropical Pacific fisheries, according to WDC
  • Pollution, plastic ingestion etc – basically, mankind’s negligence over 60 years or so
  • General habitat degradation, disturbance and marine noise pollution – mankind again

Pan-tropical Spotted Dolphins, Abaco Bahamas (BMMRO)Pan-tropical Spotted Dolphins, Abaco Bahamas (BMMRO)

Credits: BMMRO for all photos; research credits NOAA; WDC

MARINE POSTER COMPETITION FOR ABACO KIDS


BMMRO children's poster competition winners

MARINE POSTER COMPETITION FOR ABACO KIDS

BMMRO recently collaborated with Dolphin Encounters Marine Education Poster Contest in a competition for schoolchildren on Abaco. There were 3 age groups, 3 -5, 6 – 8, and 9 – 12. The young participants received the excellent BMMRO marine educational poster as a prize, though I suspect they were motivated not so much by a prize but by the fun possibilities of the challenges set for them. 

BMMRO children's poster competition winners

And how well they met them. I am featuring a selection of the prizewinners as posted by BMMRO on FB and Insta. Bearing in mind the ages of the artists, the results are astounding. As someone for whom the task of drawing a stickman presents insurmountable difficulties of perspective, proportion, form and accuracy, I am in awe of the inventiveness of these young minds and their artistic skills. They’ve done a fantastic job in highlighting the critical conservation issues facing all marine creatures large and small, with an awareness that I hope will help stay with them into adulthood.

BMMRO children's poster competition winnersBMMRO children's poster competition winnersBMMRO children's poster competition winnersBMMRO children's poster competition winnersBMMRO children's poster competition winnersBMMRO children's poster competition winnersBMMRO children's poster competition winnersBMMRO children's poster competition winnersBMMRO children's poster competition winnersBMMRO children's poster competition winners

Do I have a favourite, I asked myself. Actually, no – I’d just be proud to have any of these on my wall. And I bet the teachers and the families involved all feel the same.

HUGE CONGRATULATIONS TO ALL THE WORTHY WINNERS

BMMRO children's poster competition winnersBMMRO children's poster competition winners

 

SPERM WHALES GATHERING IN ABACO WATERS


Sperm Whales, Abaco Bahamas (BMMRO / Keith Salvesen)

SPERM WHALES GATHERING IN ABACO WATERS

During the past week, the BMMRO research boat has been tracking sperm whales off the south coast of Abaco. These huge creatures are the largest marine mammals found in Bahamian waters, and the area between Rocky Point around the south coast to Hole-in-the Wall is a great place to find them. 

Sperm Whales, Abaco Bahamas (BMMRO / Keith Salvesen)Sperm Whales, Abaco Bahamas (BMMRO / Keith Salvesen)

One reason they are found in this particular area is the existence of the Great Bahama Canyon, one of the deepest submarine canyons in the world. The depth of the canyon ensures that the waters are nutrient-rich, with food being drawn up from the depths towards the surface. In season it’s the perfect place for female sperm whales and their calves.

Sperm Whales, Abaco Bahamas (BMMRO / Keith Salvesen)Sperm Whales, Abaco Bahamas (BMMRO / Keith Salvesen)

The BMMRO research trip encountered more than a dozen sperm whales, mostly females with their calves. And the amazing thing is that the sightings are often made within sight of land. In these photos, the are two landmarks visible. One is the huge Disney vessel parked at Gorda Cay aka Castaway Cay (header image); the other is HOLE-IN-THE-WALL LIGHTHOUSE (above)

Sperm Whales, Abaco Bahamas (BMMRO / Keith Salvesen) Sperm Whales, Abaco Bahamas (BMMRO / Keith Salvesen)

Credits: All photos BMMRO 2018, with thanks to Diane & Charlotte as ever

Sperm Whales, Abaco Bahamas (BMMRO / Keith Salvesen)

‘SOCIABLE DOLPHINS’: MELON-HEADED WHALES


Melon-headed whales, Bahamas (BMMRO / Field School)

‘SOCIABLE DOLPHINS’: MELON-HEADED WHALES

Last month, BMMRO undertook a joint expedition with FIELD SCHOOL to carry out research on sperm whales. This took them out into deep water, where another, quite different, cetacean species was also encountered on the final day – a huge pod of more than 100 melon-headed whales Peponocephala electra.

Melon-headed whales, Bahamas (BMMRO / Field School)

The melon-headed whale is in fact – like the FALSE KILLER WHALE I recently wrote about – a species of dolphin. It is sometimes more accurately called the melon-headed dolphin, which removes any confusion. These creatures are oceanic, preferring deeper waters. For that reason they are not often encountered, despite being quite common in tropical and sub-tropical waters around the world.

Cetacea range map Melon-headed Whale.PNG

Melon-headed whales, Bahamas (BMMRO / Field School)

The MHW belongs to a dolphin species commonly known as blackfish. Other dolphins in this group included, for the Bahamas, the pygmy killer whale and the more frequently encountered pilot whale, a species than can be seen in the Sea of Abaco.

In some of these photos you can see the distinctive white lips of the MHW Melon-headed whales, Bahamas (BMMRO / Field School)

Melon-headed whales are notably social animals. They live in large groups – often more than 100-strong (as the expedition found), up to as many as 1000 individuals. Within these large groups, smaller groups of a dozen or so form and stay close as they swim.

Note the ‘Rainbow Blow’ caught in this photoMelon-headed whales, Bahamas (BMMRO / Field School)

MHWs appear to communicate or perhaps to bond by touching flippers. MHWs also associate with other dolphin species, and they have even been recorded with large whales such as humpbacks.

Melon-headed whales, Bahamas (BMMRO / Field School)

Other observed behaviour includes sub-surface resting in numbers, boat-wave riding, and so-called ‘spy hopping’ (above). This last activity may be carried out by several resting animals,  which jump vertically out of the water and splash back again into the ocean (see also the Header image).

Melon-headed whales, Bahamas (BMMRO / Field School)

This video was recorded during the expedition. You’ll get a very good idea of the size of the group from the drone shots as they pull out. I doubt that many people would expect to see such large sea creatures in such numbers – it must be an awesome** sight.

10 MELON-HEADED FACTS WITH WHICH TO ASTOUND YOUR LOVED ONES
  • The MHW’s head is rounded, lacking the obvious beak of more familiar dolphins
  • The darker grey face is sometimes called a ‘mask’
  • Their distinctive white lips are a good identifying feature
  • They are capable of swimming at very fast speeds
  • Like other dolphins, they make series of low jumps out of the water as they swim
  • Their groups often contain 100 individuals, up to as many as 1000
  • An adult grows to around 3m / 10′ long
  • They live for at least 20 years, and females may live as long as 30 years
  • As with many certaceans, their favourite food is squid
  • Oh, did I mention that they are really dolphins and not whales at all?

CREDITS: all fantastic photos & the original of the video clip – © BMMRO /  Field School

** In its true and original meaning of ‘inspiring wonder and awe’ (historically, in a religious sense), rather than the diluted modern usage as in ‘awesome pizza’ or ‘awesome selfie’