ONE GOOD INTERN DESERVES ANOTHER (Part 1)


Coral reef research, Australia (Oscar Ward)

ONE GOOD INTERN DESERVES ANOTHER (Part 1)

Four years ago a young English friend of ours, Oscar Ward, was lucky enough to be offered an internship with the Bahamas Marine Mammal Research Organisation (BMMRO). At the time, he was post-school, and waiting to start a degree course in marine biology at university. He had no practical experience at all, so he had to progress from the menial tasks (scraping barnacles off the bottom of the research boat) to the more adventurous (whale poop-scooping) to the scholarly (collection and analysis of samples and data, including audio file matching of whale calls for identification). The need for hard work, concentration and accuracy were made clear from the outset… and as you will see, Oscar’s short internship has stood him in very good stead during his university course.

Oscar weekending at Gilpin Point – self-sufficientBMMRO Internship - weekend off (Oscar Ward)

From a promising start on Abaco, and with 2 year’s study behind him, Oscar is currently spending the 3rd year of his 4-year course in Australia, working with The Australian Institute of Marine Science. He has been involved in a number of complex projects focussed on corals and reef life – as we all know, a matter of huge concern – and the projections for the future of the reef systems in a time of warming seas and raised acid levels. Oscar also assists PhD students, for example examining the damaging effects of parasitic worms on coral; and the effect of changing light conditions on corals.

Nurse Sharks, Great Barrier Reef (Oscar Ward)

Much of Oscar’s time has been spent doing fieldwork. Often he is at sea, monitoring and collecting samples in the Southern Great Barrier Reef, diving two or three times a day. This work is often carried out in restricted or preservation zones, and with ever-present manta rays, sharks and sea turtles around him.

Manta Ray, Great Barrier Reef (Oscar Ward)

Right now Oscar is involved with the investigations into the recent bleaching events, work that is at the forefront of serious concern for the GBR and far beyond. I have recently corresponded with him – he has definitely not forgotten that his grounding for the fieldwork and studies that he is engaged in – and very likely his career – came from his time on Abaco and the lessons he learned during his time with the BMMRO at Sandy Point.  (In part 2: another good intern, currently at Sandy Point)

Coral reef research, Australia (Oscar Ward)

All photos: Oscar Ward (the header image is taken from a research vessel – no idea how, maybe a drone with fish-eye lens?)

TURTLE BREEDING SEASON & A SMALL POEM TO PONDER


Sea Turtle - Adam Rees / Scuba Works

TURTLE BREEDING SEASON & A SMALL POEM TO PONDER

The turtle lives ‘twixt plated decks
Which practically conceal its sex.
I think it clever of the turtle 
In such a fix, to be so fertile.

Sea Turtle - Adam Rees / Scuba Works

Anyone unfamiliar with the works of OGDEN NASH (1902 – 1971) would do well the check out his inimitable poetry, in which he takes extreme liberties with both rhyme and scansion to great comic effect. The poem above is a good example of Nash’s neat way with words. It always makes me laugh, anyway. So simple, looks so easy, but a very difficult trick to pull off consistently as Nash effortlessly does.Sea Turtle - Adam Rees / Scuba Works

As the turtle breeding season moves forward, I though this would be a good time to show a few of the great turtle photos taken by Adam Rees of ‘Scuba Works’.Sea Turtle - Adam Rees / Scuba Works

Sea Turtle - Adam Rees / Scuba Works

All photos: Adam Rees / Scuba WorksSea Turtle - Adam Rees / Scuba Works

ATLANTIC SPOTTED DOLPHINS OFF ROCKY POINT, ABACO


Atlantic Spotted Dolphins off Rocky Point, Abaco

This pair was in a group of 8 Atlantic Spotted Dolphins that we encountered yesterday during a day’s expedition on the Bahamas Marine Mammal Research Organisation (BMMRO) research boat. We spent nearly an hour with them, and there will be a longer post about these magnificent creatures in due course. But right now, I’m still in single image posting mode while “on-island”…

Photo: Keith Salvesen / BMMRO

FORAYS WITH MORAYS (4): EXPRESSIVE FEATURES


Green Moray Eel (Melinda Riger / Grand Bahama Scuba)

FORAYS WITH MORAYS (4): EXPRESSIVE FEATURES

Time to return to those extremely expressive characters of the coral reefs, moray eels. Specifically, some green morays. One hesitates to anthropomorphise or ‘project’ human emotions onto creatures but with some species it’s hard not to do so. Following Mr Grumpy (or perhaps Mr Sad) in the header image, here are some close-ups of morays appearing to express their emotions, from happy to downright furious… Eels featured here include Judy and Wasabi, and I remind myself that the human habit of naming familiar wild creatures is itself a (perfectly harmless) form of benign animism. Exactly as with the regular banded piping plovers featured elsewhere in this blog that overwinter on Abaco’s beaches, such as Harry Potter, Bahama Mama and the delightfully-named Felicia Fancybottom…

Happy and contented?Green Moray Eel (Melinda Riger / Grand Bahama Scuba)Green Moray Eel (Melinda Riger / Grand Bahama Scuba)Green Moray Eel (Melinda Riger / Grand Bahama Scuba)

Something on my mind…Green Moray Eel (Melinda Riger / Grand Bahama Scuba)

Slightly amused?Green Moray Eel (Melinda Riger / Grand Bahama Scuba)

Pretty funny, actuallyGreen Moray Eel (Melinda Riger / Grand Bahama Scuba)

Ha ha…! Hilair!Green Moray Eel (Melinda Riger / Grand Bahama Scuba)

Watch it. You are beginning to bug us, Mr Harbour, with your stupid captionsGreen Moray Eel (Melinda Riger / Grand Bahama Scuba)

ANGRY. BACK OFF… NOW!!!Green Moray Eel (Melinda Riger / Grand Bahama Scuba)

THE NEXT POST WILL BE FROM ABACO HQ NEXT WEEK

Credits: All morayvellous photos, Melinda Riger / Grand Bahama Scuba except 6, Virginia Cooper / Grand Bahama Scuba

SAWFISH: UNIQUE LIVE BIRTH FOOTAGE ON ANDROS


sawfish-biminis-marine-pa-campaign-grant-johnson

SAWFISH: UNIQUE LIVE BIRTH FOOTAGE ON ANDROS

The word ‘awesome’ – a word of Biblical origin and medieval usage connoting an experience of wonderment with an element of dread* – lost its power once it became the common verbal currency for describing the offer of a beer, a photograph of a sulky cat, or a so-so pub band. Where to turn for something truly momentous? Oh, actually that might do nicely. Breathtaking, astounding, astonishing, awe-inspiring, staggering, extraordinary, stupendous, and spectacular are examples of synonyms that have retained at least some of their power. And perhaps ‘mind-blowing’, though it’s a bit substance-tinged. ‘Amazing’ has pretty much gone the way of awesome. Amazeballs and badass? Let’s not!

Sawfish Grand Bahama (BNT / Buzz Cox)

Ok. Having got that linguistic grump out of the way (index under ‘English Language, debasement of, modern usage in), here’s the real deal: a truly phenomenal short video of a smalltooth sawfish Pristis pectinata safely giving live birth in the wild to her 5 babies (which are called pups) on Andros during a FSU research trip. The pups emerge as small replicas of their parent, complete with their hedgetrimmer-style rostrums, ready to swim away. Fishes that carry their young and give birth to one or more developed juveniles in this way are called ovoviviparous.

Sawfish_1

The commentary is clear and informative, the research potential for this vulnerable species is considerable, and if you have a soul and a spare 3 minutes, you really should watch this!

This unique recorded event took place last December. The joint research trip to Andros by the FSU Coastal and Marine Lab and NOAA was led by Dr. Dean Grubbs. The purpose of the research was to discover evidence of any exchange between the sawfish population in the U.S. and Bahamas. You can find out more about the research and scientists at the FSUCML website. And if you want to get involved and take part in an expedition, click GET INTO THE FIELD

Sawfish_1

RELATED POSTS

RH SAWFISH PAGE – pics, facts and vids, including how the rostrum is used in feeding

GUITARFISH (WTF? 8)

* ‘Awful’ had the same meaning as awesome, historically – cf dreadful. It did not mean a bad film or a lousy restaurant.Sawfish_1This recent photograph by Adam Rees of Scuba Works was taken in Florida waters. It is one of an astonishing school of 8 smalltooth sawfish, the largest group Adam has ever encountered.sawfish-2-adam-rees-scuba-works-copy

Credits: Header, Grant Johnson @60poundbullet (Bimini), with many thanks; BNT / Buzz Cox (Grand Bahama); Adam Rees / Scuba Works

BLUEHEAD WRASSE: PRIVATE LIFE LAID BARE


bluehead_wrasse_thallasoma_bifasciatum_oregonstate-edu-pinterest

BLUEHEAD WRASSE: PRIVATE LIFE LAID BARE

The bluehead wrasse (or blue-headed wrasse) Thalassoma bifasciatum is a denizen of the coral reefs of the tropical waters of the western Atlantic Ocean. This bright little 4-inch fish is… a wrasse with a blue head. No more and no less. Unless it’s a juvenile. Then it is mainly bright yellow. It’s similar to BLUE TANG (aka ‘the Disney Dory’), which starts life bright yellow and grows up to be blue.

blue-head-wrasse-melinda-riger-g-b-scuba-copy

The species may be found singly, in pairs or small groups, or in schools.  They have an important role to play in the life of the reef. They are CLEANER FISH, vital to the health and wellbeing of the larger species they attend to, and thus of the reef itself. This is ‘cleaning symbiosis’, a relationship of mutual benefit. The big fish get cleaned; the little fish have a useful function and – importantly for them – therefore don’t get eaten. 

thalassoma_bifasciatum_bluehead_wrasse_san_salvador_island_bahamas-james-st-john-wiki

Having said that, blueheads are of course fair game as a snack for species that aren’t in the market for their cleaning services. And, unfairly, some species that are content to let cleaner gobies runtle around their gills and mouths are not so considerate of the wrasse. Some types of grouper and moray eel, for example.

bluehead_wrasse

TELL US EXACTLY SEVEN BLUEHEAD WRASSE FACTS

  • Juveniles can alter the intensity of their colour, stripes & bars
  • The bluehead wrasse is a ‘protogynous sequential hermaphrodite’
  • All are born female**. Some change sex to male during maturation (see below)
  • Food includes zooplankton, small molluscs and small crustaceans…
  • …and parasites / other juicy bits (fungal growths, anyone?) from bigger fish
  • The main threat to the species is coral reef degradation or destruction
  • The bright colours invite aquarium use, but the trade is not a significant one

** Some sources suggest some are born male and remain male. I’m not sure which is right

A juvenile bluehead (with feather-duster worms) – mostly yellow, with a pale underside
Bluehead Wrasse juvenile (wiki)

THE REMARKABLE SEX LIFE OF THE BLUEHEAD WRASSE

This is an unavoidable topic, I’m afraid. The bluehead’s sex life is the most interesting thing about them, and this is no time to be prudish. It is the subject of extensive scientific research, not all of which I have read since I decided to write about the species last night. Like many human relationships, “it’s complicated”, but in a conch shell it boils down to this:

  • To recap, BWs are born female and as they mature, some become male.
  • Males reach an ‘initial phase’ when they can breed in groups with females
  • Some males grow even larger & reach full colouration. This is the ‘terminal phase’
  • These large males aggressively chase away smaller ones & seek females to pair with
  • Their state of readiness (as it were) is signalled by colour changes
  • This behaviour is similar to that seen in many city centres in a Saturday night
  • The smaller fish have one bonus – their sperm count is higher than a dominant male
  • Prozac tests have shown that the drug reduces a dominant male’s aggression

blue-headed_wrasse_det (wiki)

As the excellent organisation OCEANA puts it: Bluehead Wrasses may reproduce in four different ways throughout their lifetime:  1) as a female in a group spawning event; 2) as a female in a pair spawning event within the territory of a large male; 3) as a small male in a group spawning event; and 4) as a dominant, terminal male in a pair spawning event within its own territory.

A cropped still from a video I took at Fowl Cay marine reserve. I’ve looked at dozens of images online and not found one that was all blue with a yellow end to its tail fin. Maybe it’s not a BW at all. Or it’s a different type of fish completely. Or perhaps it is just an all-blue alpha male.bluehead-wrasse-fowl-cay-mr-abaco

Credits & Sources: Melinda Riger; Adam Rees; James St John; Oregon State edu / Pinterest; Wiki images; self; Oceana; IUCN; magpie pickings

A bluehead wrasse passes the time of day with a gruntbluehead-wrasse-grunt-adam-rees

ABSORBING SPONGES ON THE BAHAMAS REEFS…


sponge-melinda-riger-gb-scuba

ABSORBING SPONGES ON THE BAHAMAS REEFS…

A while back I showed a collection of colourful sponges – one that you might come across with minimum equipment. Snorkel, mask, flippers. Oh, and a coral reef, if you happen to have one handy. I suspect that to quite a few people the word ‘sponge’ means soggy yellow thing, as found in the proximity of a bath. Or a scratchy nylon-based equivalent. Well, here are a few more sponges to enjoy. Some I can give you the names of, some I don’t know and am too idle busy to look up… Sorry.

sponges-melinda-riger-g-b-scuba

Candelabra Songe (with brittle stars attached)candelabra-sponge-melinda-riger-g-b-scubasponge-melinda-riger-g-b-scuba

Black Ball Spongesblack-ball-sponge-melinda-riger-g-b-scuba-copy

One for Valentine’s Dayheart-shaped-sponge-melinda-riger-gb-scuba

Vase Spongesvase-sponge- pink-melinda-riger-gb-scubavase-sponge-melinda-riger-g-b-scuba

sponges-and-coral-on-the-reef

Spawning Brown Encrusting Spongebrown-encrusting-sponge-spawning-melinda-riger-g-b-scuba

All photos: Melinda Riger, Grand Bahama Scuba