OMSAC Cleanup Dive in Hout Bay Harbour

The divers with the garbage that was collected
The divers with the garbage that was collected

The third Saturday in September is International Coastal Cleanup Day. Millions of people head out en masse to pick up litter on beaches, in estuaries, and at other coastal sites. Divers around the world venture into locations that are heavily trafficked by humans, and pick up litter in the underwater environment. Last year we attended a cleanup dive in Murray Harbour on Robben Island, arranged by OMSAC. It was so enjoyable and so well organised that we decided to join OMSAC again this year, in cleaning up Hout Bay harbour.

Divers after entering the water at the floating jetty
Divers after entering the water at the floating jetty

We’ve actually been itching to check out what lies beneath the waters of Hout Bay harbour for some time. It’s a popular launch site during the summer months, and has a pleasant paved parking area with marina and mountain views. There are some hole in the wall cafes and restaurants around to provide expensive and unhealthy fare to the desperately hungry diver, and – for the non divers – the nearby Bay Harbour Market (a recently established market with much to recommend it apart from its preponderance of insufferably smug boys in tight, tapered jeans and ridiculous hats, who think that having a tufty beard at age 25 makes them seem moody and introspective – eventually someone will tell them it looks stupid, I hope). I digress.

Waiting on the surface to start the dive
Waiting on the surface to start the dive

Rant about obnoxious Cape Town subcultures aside, upwards (my estimate based on counting heads in the group photo!) of 80 divers converged on the parking area below NSRI Station 8 in Hout Bay harbour. After receiving our goodie bags, with an awesome Electrolux-sponsored golf shirt, a cap, a water bottle, and some sweets (I hardly saw mine except as they disappeard down Tony’s gullet!) we divided into groups of 10-15 and received coloured tags to put on our BCDs. The idea was that the groups would dive together, which reflected either extreme optimisim about the conditions underwater, or was just for show!

A Cape rock crab hides under some sea lettuce
A Cape rock crab hides under some sea lettuce

A short briefing held upstairs in the NSRI building informed us that we would enter the water off the floating jetty in the marina, and then swim under the jetty, across the inner part of the harbour, and exit at the slipway. We were to use green mesh bags to collect the rubbish we found, using judgment when it was already inhabited or encrusted with sea life.

Representative photo of the visibility when other divers were about!
Representative photo of the visibility when other divers were about!

Like all harbours (because there is no water movement, as Tony explained to his ignorant wife), Hout Bay harbour is very silty, and the slightest movement stirred up great white clouds that reduced the visibility to almost nothing. Despite this, and despite a strong fear of receiving a Japanese haircut from a passing boat, Bernita and I had an exhilarating dive after losing the rest of the group almost instantly upon descent. We found all manner of items, but mostly plastic bags and a few bottles. I’ll write about the dive in a separate post.

Mounds of garbage
Mounds of garbage

We surfaced near the slipway, and had to wait while a boat full of poachers (not kidding) got themselves organised and puttered off to plunder the seas around the corner. After reporting to the controllers that we were out of the water, we deposited our (smelly) bags of trash with the rest of the goods that the other divers had retrieved. Some of it was awesome stuff – several pool pumps and boat/car batteries, lots of piping, and even a GPS/fish finder unit that must have made its owner weep bitter tears as it sank expensively beneath the water.

Prizegiving inside NSRI Station 8
Prizegiving inside NSRI Station 8

The prize giving was held in the NSRI common room again, and awards were given to those who had retrieved large items such as batteries and pool pumps, for the coolest piece of junk (an Arabic – I think – alphabet – I think!) and to the guy who found the GPS unit. He won a really cool vacuum cleaner from Electrolux – perhaps it’s a sign of increasing age and domesticity that I can get excited about a household appliance, but I want one of these.  The oldest and youngest divers were rewarded, and there were even prizes for three divers who had to be chased back into the designated diving area by the metro dive boat. No one actually owned up to this, but we later found that Goot – one of our group – had been one of the rogue divers heading south instead of north!

Weirdest piece of garbage: an Arabic A-Z
Weirdest piece of garbage: an Arabic A-Z

Tony and I were given a prize for (excessive?) enthusiasm – but if the OMSAC committee thinks they’ll dissuade us from further events by embarrassing us, they’ve got another thing coming! It was a wonderful morning, well organised, with admirable safety provisions. We couldn’t believe how punctually things ran – co-ordinating such a large group of divers without incident is no mean feat.

Electrolux provided sponsorship
Electrolux provided sponsorship

Primary sponsorship was from Electrolux, as part of their Vac from the Sea program, and the Plastics Federation of SA. It was good to see heavy plastic users and manufacturers getting involved in efforts to reduce plastic pollution. Proceeds of the event were donated to the NSRI.

We found this anchor, but raising it was not an option
We found this anchor, but raising it was not an option

We completed the day doing two dives on the Underwater Explorers boat, both to the MV Aster. The second dive was a boat night dive, a new experience for me since all the other night dives I’ve participated in have been off the shore! More on that another time.

 

Newsletter: Hout Bay to Mozambique

Hi divers

What we have been up to

For those of you that did not make it to the ocean last weekend I can truly say you missed out big time!! The OMSAC clean-up dive on Saturday morning was really enjoyable with some amazing articles being removed from Hout Bay harbour. True to form OMSAC ran an excellent event with everything happening on schedule. After the clean-up we dived the Aster wreck. We dived on Nitrox to maximise our bottom time and penetrated the forward hold. Goot and Gerard were doing their Nitrox specialty dives, Goot had a taste of wreck penetration, and Cecil was also test diving his new twin tank setup so we had a ‘’busy’’ dive.

Tiny basket stars on the Aster
Tiny basket stars on the Aster
The mast of the Aster at night
The mast of the Aster at night

Back on dry land we waited out the sunset and then went back out to the Aster for a night dive. The conditions were great, visibility 10 -12 metres and cold water (11 degrees) on the bottom. Night dives to the deeper wrecks are more challenging than shore night dives so a big well done to the guys and girls that joined.

Goot, Tami, Tony, Clare, Gerard and Cecil, ready for a night dive on the Aster
Goot, Tami, Tony, Clare, Gerard and Cecil, ready for a night dive on the Aster

Talks

On Tuesday evening we attended a talk and slide show at Dive Action. Barry had done some diving in a fjord in Norway and recounted the trip with a lot of info and photos of the dive centre there and the wrecks. He also talked us through the logistics of diving far from home with a few hundred kilograms of dive gear. As you know I have absolutely no knowledge of rebreathers so if you want to know more about diving with a re-breather then Barry is the man to see.

The Fernedale and the Parat side by side
The Fernedale and the Parat side by side

As you can see in this photo (courtesy of Gulen Dive Centre, kindly shared with us by Sarah from the Dive Action team), the visibility in the fjords is something else. It was taken at around 30 metres and the wreck on the right sits on the sand at over 55 metres.

This evening we attended a talk at the Save Our Seas Shark Centre by George Branch… He is one of the authors of the Two Oceans book and is an almost legendary figure in South African marine biology. The talks at SOSSC are always very good and are always ocean related so you should make an effort to attend a few… You are never too old to learn something new!!! Visit their facebook page and like them and this way you will be informed of their activities. Their page is constantly updated with some stunning photos and lots of info on sharks.

Hyperbaric chamber

Clare and I were taken on a tour of the hyperbaric medical facility in the Kingsbury Hospital in Claremont today. It is the only chamber of its kind in Cape Town and is used for many forms of medical treatments not related to diving, but should you have a  problem on a dive and get DCS, this is the place you will go! This centre is also home to one of the most respected diving doctors in South Africa. As a diver you should have DAN Medical Insurance and you should know where the nearest chamber is, how to get there and who to call. All of this information should be in your log book. Their website is here. We will post a detailed report of this visit on the blog soon. This is a fully equipped medical facility and a lot different to the chamber we did our 50 metre chamber dive in!

What we are going to get up to

Training

Saturday is pool day and if you want to join and play with your gear and buoyancy text me before 2pm Friday. The cost to scuba dive in the pool (if you’re not on course) is R50, and if you just want to swim it’s R7. We are still busy with Deep and Nitrox Specialties which we will continue with early Sunday morning, launching out of Hout Bay at 7.30am. The boat takes 14 and we are already confirmed for 10 people so text me quickly if you are in.

After the boat dive we will move to False Bay and then do dive 3 & 4 for a few Open Water students. If the conditions are good we will try the Clan Stuart or A Frame. The visibility in the bay at the moment is 10 – 15 metres and despite some southeaster for the next two day I doubt it will do too much harm so diving will be good.

Scubapro Day – 1 October

Scubapro are having a ScubaPro Day in the Simon’s Town yacht basin on 1 October. They will allow you to test dive the latest gear from their range. There will be food, drinks and goodie bags plus lots of divers and other kinds of people. Boat dives are going to cost R100 and R25 gets you a goodie bag and registration at the event. I have booked 12 places on two dives on the boat, big brother to this boat.

Ruby Runner's little cousin, spotted in Germany
Ruby Runner’s little cousin, spotted in Germany

If you want to participate you need to book and you need to do this soon. Boat dives at R100 don’t come round too often so book this week or lose out. You will need to book and pay by Tuesday next week for this event. The dives are at 8.00am and 2.00pm.

Travels

There is a trip to Mozambique on the weekend 4-6 of November. It is a five dive/three night package that starts at R1850. You will need to mail me for more info as it is a trip shared with a dive centre in Durban and will need some quick decisions.

Reminders

  1. A diver is currently in jail in Cape Town for diving without a permit… Don’t let it be you… Get a permit if you don’t have one.
  2. Book for the boat for Sunday and October 1 (ScubaPro Day) NOW!

Bye for now,

Tony Lindeque
076 817 1099
www.learntodivetoday.co.za
www.learntodivetoday.co.za/blog

Diving is addictive!

Newsletter: Wreck penetration and night dives

Hi diving people

Last weekend

Valve handles in dodgy visibility on the SAS Fleur
Valve handles in dodgy visibility on the SAS Fleur

Last weekend we dived the SAS Fleur. This rates as the best wreck dive in Cape Town, in my book. It is closely followed by the MV Aster which we plan to dive and penetrate this weekend. Back to the Fleur: we did not have exceptional visibility (about 6 metres – Clare apologises for the dodgy pictures), and the current was quite strong at depth. But as we were doing a Deep Specialty, on Nitrox, this was a perfect site. We had lots of seals during the dive and many stayed with us during our deep stop and the extended 5 metre safety stop.

Being photo-bombed by seals at the safety stop on the Fleur
Being photo-bombed by seals at the safety stop on the Fleur

After the Fleur we did two dives at Long Beach, being dive 1 & 2 for Open Water students. We visited the new Lady Long Beach reef project being built by Pisces Dive Centre.

Slightly beaten up cuttlefish at Long Beach
Slightly beaten up cuttlefish at Long Beach

Many have heard of the sardine run, well Steve Benjamin from Animal Ocean will be doing a squid run, in Cape St Francis. Diving 25th Oct – 29th Oct (5 days), this is just as the Commercial squid season closes. Visit his website for more info and look at some of the sardine run photos.

Tami approaching a swarm of box jellies at Long Beach
Tami approaching a swarm of box jellies at Long Beach

This weekend

This weekend we are diving in Hout Bay harbour on Saturday morning as part of the clean up dive organised by OMSAC. Diving starts at 9.00 am and even if you are not diving come along and join the fun. The harbour will be alive with divers, boats and humans. This is also a very photogenic part of Cape Town so bring your camera.

If you plan to participate in the cleanup dive, you must register beforehand – visit the OMSAC website for more details.

You must ensure you have your dive card AND your MPA permit with you on Saturday.

Compass sea jelly at the deep stop on the Fleur
Compass sea jelly at the deep stop on the Fleur

We have booked two dives for the afternoon with Underwater Explorers (you may remember Alistair from this post). At 2.00 pm we will do a dive to the Aster wreck, lay lines and do some penetration. Entering the wreck is not for everyone and some of the divers will stay outside while a few of us are inside. We will also attach a few cyalumes as we are doing the second dive there at 6.30 pm.

There is still space on the afternoon dive but the night dive is almost full… Speak up quickly if you want to join. We will be making a day of it so bring chairs, braai stuff and chocolate. We have also ordered sun so bring sunscreen.

There are a lot of people doing these dives on Saturday so it’s important you mail me to book any gear you want to rent. I have bought a few more wetsuits, BCDs, cylinders and regulators so I am sure we will manage but don’t wait until Saturday to let me know what you need – I’ll pack on Friday evening and leave home very early on Saturday. I also only have 6 torches to rent. You can of course go and buy these things from Andre‘s shop in Simon’s Town – email him here!

Sunday we are doing dive 3 & 4 for Open Water and if conditions are good we will dive the Clan Stuart or Windmill. Meeting time will be 10.30 as all my cylinders will be empty from the night dive and I only have one bicycle pump.

Bits and pieces of the Fleur
Bits and pieces of the Fleur

Travel plans

The planning of a Mozambique trip is taking shape and within a few weeks we will have a solid plan. We will most likely go to Ponta Do Ouro and will do the same thing we did for the Sodwana trips: fly to Durban, rent cars and have cheap tents or upmarket chalet options for accommodation. Car sharing, tent sharing and sleeping bag sharing… are all options. If you missed the last two trips then you won’t know how much fun we had but you can read all about it here.

Salps at Long Beach
Salps at Long Beach

(For more information on exactly what a salp is, check out Wikipedia. They’re alive!)

Talks

There is a talk by Barry, the owner of Dive Action, at the Dive Action shop next Tuesday evening on diving in Norway with stunning pictures. Free, starts at 6.30pm.

On Wednesday night there is a talk at 7.00pm by George Branch, author of the classic The Living Shores of South Africa and expert on all things marine biology-related, at the Save Our Seas Foundation Shark Centre in Kalk Bay. The topic is evolution, and the cost is R50. (It’s for a good cause and you also get soup and rolls.) Save Our Seas foundation does many things but the Kalk Bay centre focuses on shark conservation. They also have a marine tank that is amazing… You get to see that too. The talks here are always very good and worth the money.

Text me if you are coming to either talk (booking is essential for the Save Our Seas talk) and I will book for you and send you directions. (Well actually Clare will!)

regards

Tony Lindeque
076 817 1099
www.learntodivetoday.co.za
www.learntodivetoday.co.za/blog

Diving is addictive!

OMSAC Treasure Hunt 2011

The inaugural OMSAC Treasure Hunt was held on 9 July at the Cape Boat and Ski Boat Club at Miller’s Point – their very exposed slipway faces the opposite direction to the one we usually use, but (a major point in its favour) the CBSBC has facilities that are otherwise lacking at Miller’s Point… such as toilets and a shower or two! The bar was also appreciated by some chilly divers after their dives!

OMSAC had done a sterling job of marshalling the support of three local dive charters: Dive Action, Underwater Explorers and Pisces Divers. Their boats were launching hourly to nearby dive sites, and a couple of Extreme Shore Dives were also on the program. I’m not entirely sure what was extreme about them (I think the prizes may have been – they got gold golf balls)… Perhaps a reference to the looooong surface swim from the slipway to Shark Alley!

Beautiful morning at Miller's Point
Beautiful morning at Miller's Point

In the week prior to the OMSAC Treasure Hunt, Tony and I watched the wind with much trepidation. An unseasonal southeasterly was buffeting the bay, which usually leads to poor visibility and unhappy divers. We were surprised and delighted, however, to have 10 metre visibility on the SAS Pietermaritzburg (most unusual!) and 4-5 metres in Shark Alley. The surface conditions there were unpleasant, since by the time we launched for the second time – around 1330 – the swell had picked up quite considerably.

Anchored on the SAS Pietermaritzburg
Anchored on the SAS Pietermaritzburg

The weather on the day was magnificent – anyone who was in Cape Town on that weekend will recall it as being an absolute shining gem in the middle of winter that heralded the start of several beautiful, sunny weeks. The sun shone all day, and I spent some very happy hours sitting overlooking the waves at Miller’s Point, watching whales frolicking in the bay, and chatting to Errand Girl Bernita. There was also a steady stream of familiar faces passing by our spot in the car park, so we were not short of entertainment between dives.

Divemaster Carel on the Dive Action boat
Divemaster Carel on the Dive Action boat

In addition to the diving there was a festive atmosphere with boerewors rolls on the braai (included in the registration fee was a voucher for a boerie roll and an iced tea – owing to a glitch the iced tea never materialised but there were drinks available for purchase at the venue), a small market, and stands manned by DAN South Africa and Manex Marine. I heartily approved of the sale of coffee and hot chocolate in enamel mugs for R10, and R6 for a refill (you got to keep the mug).

The Treasure Hunt aspect of the day passed me by – I actually forgot about it as soon as I rolled into the water – but on each dive the skipper had four marked golf balls which were tossed overboard after the divers had backward rolled off the boat. Each golf ball corresponded to a prize, some of which were rather nice. This part of the day could do with some work for next year’s event… On most of the dives, one person found all the balls, as they fell close together, and one lucky chap collected about ten golf balls in total. He was also rewarded with a (ridiculous but very nice) prize for finding the most golf balls – share the love, people!

There was a raffle with the prize of a VERY proper diving holiday to Mozambique – somehow I also missed this, which is lucky as I would have spent the cost of the holiday on tickets to try and win it! In our goodie bags for the day we received back copies of Submerge, Africa Geographic and Birds & Birding Africa, as well as a fetching Old Mutual t-shirt. We were also (including the 15 year old girl who was diving with Tony’s group) each given a bottle of Sedgwick’s Old Brown Sherry. The juxtaposition of drinking and diving was slightly inappropriate! Imagine my delight to win a second bottle in the lucky draw. If anyone can suggest what two teetotallers can do with 1.5 litres of sherry, please let me know… Current best idea is to use it as drain cleaner!

There was also a lucky draw – in our goodie bags we each received a number. There was a ridiculous quantity of Stormer’s merchandise on offer (Tony won some of that), but not surprising given their embarrassing loss to the Crusaders the previous week. There was also a number of awesome prizes: boat dives with Underwater Explorers, dive gear, and a tour of Cape Town with Carel from Dive Inn. Dives in the Predator Tank at the Two Oceans Aquarium were also up for grabs. (Next year some thought should be given to limiting the number of lucky draw prizes that can be won by each person – about four folk practically cleaned up all the prizes between them! I was very jalous!)

Diving events like this that aren’t all about pushing a particular brand of gear are a big boost to local diving, and we really enjoyed the day with OMSAC. It was smoothly run, well organised, and there were provisions made so that even if the weather had been horrible, we could have a hot cup of coffee and a shower after our dives. In winter in the Cape – when the diving is the best in False Bay – this is important. It’s no mean feat to put together something like this, and as the OMSAC committee has already demonstrated with the Robben Island Coastal Cleanup we attended last year, they are more than up to the task! We’re extremely grateful for their efforts and look forward to future events.

Newsletter: Whale chasing surfers…

Hi divers

Seal at the safety stop in Smitswinkel Bay
Seal at the safety stop in Smitswinkel Bay

Now that we are well on our way to spring, summer and the silly season it is time for many of you to dust off your logbooks, lose the slippers and put on your flippers… erm, fins. Diving conditions are great all year round in the Cape and despite the bad weather days we have sometimes, there are many, awesome days that beg to be dived. Going to work is one thing but taking a day’s leave in the week and diving is very, very, therapeutic… I call it Aquatic Therapy. Try it, it works.

The past week’s dives

Tiny basket star on the MFV Orotava
Tiny basket star on the MFV Orotava

Last weekend an 8 metre swell on Saturday kept most of us dry that day. We dived the MFV Orotava wreck in Smitswinkel Bay on Sunday.  The surface conditions were decent but it was very surgy at depth. The visibility was good and we were doing Deep and Nitrox Specialties so this was the perfect dive for this. Diving was also good in the week and on Wednesday we had 27 degrees in the parking lot, not a breath of wind (conditions very suitable for tanning) and 8 metre visibility in the water.

Two friendly frilled nudibranchs on the Orotava
Two friendly frilled nudibranchs on the Orotava

Weekend diving

This weekend will grace us with good diving on Saturday and less so on Sunday. We are doing a deep dive early on Saturday, to the Fleur, a wreck in the middle of False Bay that lies at around 40 metres on the sand. Grant will do another two launches, to the SAS Pietermaritzburg and to Roman Rock so if you are keen to go boating, which you should be, then shout.

I will spend the afternoon at Long Beach with Open Water students. Sunday is less easy to plan. The diving conditions will be good but it may be very cloudy and for some this relates to cold. I will decide Saturday afternoon but will dive at A Frame or Windmill Beach. There is a 3 metre swell which may just make A Frame difficult. Windmill Beach is often difficult on weekends due to the limited parking but on a cloudy day we may be lucky. It is a shore entry with a walk to the beach that is a little longer than the walk at Long Beach, but involves less rock scrambling. Shout if you are coming.

Speckled klipfish on the MFV Orotava
Speckled klipfish on the MFV Orotava

Gear

I have recently replaced some of my older gear and added a few extra items. If you rent gear from me on a regular basis please mail me for an updated price list.

Coastal Cleanup Day

Next Saturday morning we are joining OMSAC for International Coastal Cleanup Day, with a cleanup dive taking place in Hout Bay harbour. If you’d like to come along, sign up here and check out event details here. It costs R25, and payment must be made directly to OMSAC. If you need to rent gear for the dive, I can assist. I think it’s going to be quite festive.

This time last year

There are lots of whales in the bay at the moment. I watched a few surfers have a panic attack today and paddle faster than they thought possible when a whale surfaced less than 100 metres from them.

A whale greets three alarmed surfers in Muizenberg
A whale greets three alarmed surfers in Muizenberg

Last year this time we had whales on the surface at the end of a dive in Smitswinkel Bay and that photo soon became the most viewed photo on our blog. Another ‘’last year’’ item, last year I made it possible for any of the courses I offer to be purchased on a split payment arrangement. This worked well for me and many of the students that dived last season. I am going to do the same again on a more permanent and easier payment system. If you want to do a course but don’t have the money, mail me and we can work out a payment schedule.

We have again sponsored some dive training for the Reach for a Dream Foundation. Last year they auctioned and sold raffle tickets for the courses we sponsored and collected a fair amount of money for this charity. So visit their website and help someone reach for a dream. It’s a very good cause.

regards

Tony Lindeque
076 817 1099
www.learntodivetoday.co.za
www.learntodivetoday.co.za/blog

Diving is addictive!

Lecture: Meaghen McCord on Bull Sharks

A couple of weeks ago Tony and I attended at talk on bull sharks (also called Zambezi sharks by South Africans) given by Meaghen McCord of the South African Shark Conservancy (SASC) based in the Old Harbour in Hermanus. We’ve heard Meaghen talk before at False Bay Underwater Club, but we were particularly keen to attend this talk (held at the Save Our Seas Shark Centre in Kalk Bay) because some exciting things have happened since Meaghen spoke at FBUC. It was the third (we missed the second one because we were in Malta) in a series of talks at the Shark Centre, concerned with sharks and man. The first speaker was Christopher Neff.

Truth and fiction about bull sharks

Bull sharks (Carcharhinus leucas) are one of the species of sharks that are tolerant of brackish and fresh water conditions. They are not the only species that doesn’t mind freshwater – other examples include the Ganges river shark (found in the Ganges in India – surprise!) and a cluster of Australian freshwater shark species all from the genus Glyphis. They are not, as is popularly believed, solitary or territorial, but have been known to form feeding and hunting aggregations. Nor do they have the highest testosterone level of any animal – an often repeated assertion that Meaghen pointed out is false. This idea was based on a 1970s-era study involving only three animals: a male bull shark, and two female sharks.

The internet abounds with misconceptions and pejorative words about bull sharks, calling them “known man eaters” and citing their enthusiasm for attacking humans. As Meaghen noted, even innocent-looking deer are known to attack humans, and the most dangerous creature on earth – measured in terms of deaths it directly causes – is the anopheles mosquito.

Bull sharks have a low value in fisheries as their flesh is full of ammonia and urea (in other words, it tastes gross!), but they are killed for the shark fin trade – particularly in developing nations such as India and Mozambique. They are also favoured by sport fishermen. Until recently there was no limit on how many could be caught by each angler, but they are now restricted to one bull shark per day. Which is still one too many, if you ask me. As a result of the fishing and the finning, the IUCN lists them as globally near threatened.

Some knowledge exists in Africa regarding bull shark distribution patterns, growth, movement and reproductive habits, but there is nothing in the way of relevant management measures for these creatures. As you’ll see shortly, it’s vital that international co-operation takes place on this species, because they cross borders with alacrity!

Bull sharks in South Africa

Prior to 2009, bull sharks had only been recorded as far south as the Sundays River. Some gut instinct, persistence, luck and hard work led Meaghen and her team to catch a bull shark in the Breede River in 2009, representing a 366 kilometre range extension for the species. What’s more, the shark they landed measured 4 metres total length (tip of snout to farthest extent of caudal fins) which was 50 centimetres longer than the largest bull shark EVER recorded anywhere in the world!

The upper reaches of the Breede River (near Swellendam)
The upper reaches of the Breede River (near Swellendam)

The shark they caught was named Nyami Nyami after the Zimbabwe river god, and was tagged and tracked for 13 days, during which time she did not leave the river at all. She went as far as 32 kilometres upriver, but spent most of her time around 11-15 kilometres up the river, eating the bait off the recreational anglers’ hooks. Her movement was mostly tidally driven, and theories for this include energy saving (important for wild animals), and the possiblity that fish are driven off the river banks by the outgoing tide, resulting in a free meal for the passing shark.

The tags in use in the Breede at the moment are acoustic tags that emit a signal that can be detected by a hydrophone. In order to track the shark, the SASC team has to follow it around with a boat, orienting the hydrophone to find the maximum signal strength to figure out which way the shark is moving. If they get too far from the shark, it’s lost.

Pumpkin

Since meeting Nyami Nyami, in January 2010 the team caught, tagged and tracked two males, both three metres long, called Pumpkin and Jeremy respectively. Jeremy was named after Jeremy Wade, the host of Discovery Channel’s River Monsters show and a so-called “extreme angler” who helped in the capture of both sharks (and was filmed during the process for his show, I assume).

Pumpkin was caught again in March 2011, and fitted with a pop-up archival tag (PAT). It was shortly after doing this that Meaghen came to talk at FBUC, and she shared how the tag had been programmed to pop off Pumpkin’s body after 99 days. It records light intensity, depth, temperature, and a range of other measurements, and when it pops to the surface it announces its location (barring any malfunction) to a passing satellite.

Beach on Ilha de Magaruque, one of the Bazaruto islands
Beach on Ilha de Magaruque, one of the Bazaruto islands

Pumpkin’s tag came off after only 53 days, and surfaced somewhere near the Bazaruto Archipelago off Mozambique. The shark had travelled over 2000 kilometres in just under two months – completely rubbishing the commonly-held view that these are sluggish, lazy animals. A reward is offered for the return of the tag itself (just in case you’re heading to Mozambique any time soon) – certain data can only be retrieved with the device in hand.

SASC

SASC’s objective is “promoting understanding of and participation in the management of bull sharks in Southern Africa.” They recieve funding from Save Our Seas, and support from the Department of Agriculture, Forestry and Fisheries (DAFF). Their experience with Pumpkin has led to what Meaghen called “three burning questions” that they’d like to answer:

  1. What is the role of bull sharks in the Breede River?
  2. How do they influence community structure in estuarine systems?
  3. How can this information be used to co-manage estuaries and apex predators?

The bull shark project aims are to determine the genetic structure of the Breede river bull sharks, and determine whether they are a distinct genetic group. They also aim to determine abundance and population structure of these sharks (how many males, females, what ages they are, etc.) and to find out how they utilise their habitat.

A question that I’d love to see answered (and which they plan to) is whether the Breede river is a pupping ground for Zambezi sharks! The St Lucia estuary is the only known pupping area for these sharks in South Africa, but it’s been closed to the sea for the last decade.

The Breede river is also impacted by physical activities and chemical substances brought there by humans, and it’s important to determine how these affect the sharks, their distribution and movement in the river.

Future plans

SASC plans to collect fisheries and eco-tourism data, conservation status, current management strategies, distribution and abundance data for contribution to an online “bull shark atlas” which will facilitate international co-operation and education as regards this species. They’d also like to find out whether these sharks exhibit philopatry (return to their own birthplaces, and possibly breed there too).

An acoustic array is planned, comprising a set of permanently fixed receivers in the river that will record the movements of tagged animals. SASC hopes to tag prey fish such as dusky kob and spotted grunter, as well as sharks. An exciting development in this regard is the Ocean Tracking Network, an international initiative that will be by led locally by the South African Institute for Aquatic Biodiversity. The OTN will comprise a large number of underwater receivers or listening stations that can all read and record data from compatible tags. In this way a fish tagged in South Africa can be tracked all over the world, if it swims near any of the OTN receivers.

The Breede river system is massively impacted by human activity in various ways, and SASC would like to define the role of apex predators in this sort of environment. There are also plans to study niche partitioning (such as concentration on specific food sources by each species in the face of competition) with other large apex predators. Great whites, bronze whalers, ragged tooth sharks and hound sharks are also found around the river mouth.

Bull sharks and people

Unsurprisingly, some of the Breede river residents and holiday home owners have reacted very negatively to the discovery of sharks on their doorstep. The fact that these sharks were there long before the people were, and that no incidents of any kind have been reported, as well as the presence of several other shark species just outside the river mouth (as I mention above), makes this reaction a bit ridiculous. The presence of these sharks also indicates that the Breede river is a healthy ecosystem, which should inspire pride in those who live near it. Meaghen said that SASC receives co-operation and enthusiastic support from many of the locals too – particularly those who have been in the area for a long time. Personally, I’d be thrilled if a shark lived in my front garden!

I particularly liked the thoughts expressed by one of the other members of the audience, who apparently has a boat and house at the Breede river and has offered to help Meaghen with the project. He expressed concern that “Rambo types” will come to try and catch the sharks or prove something about themselves, but he also said that the bull sharks “deserve to be there”, and they don’t come and harrass him in his bed, so he sees no reason to disturb them in their home.

For pictures of bull sharks, check out the SASC website or use the Google – I don’t have any taken by either me or Tony and I hate poaching other people’s pictures! They are very beautiful creatures, with sharply delineated, squared-off faces.

Dive sites (Malta): Atlam Sub Aqua Club commemorative plaque

Divemaster Sergey hovers near the statue
Divemaster Sergey hovers near the statue

The Atlam Sub Aqua Club (Atlam is Malta spelled backwards) put this commemorative plaque and statue of an old fashioned diver’s helmet up in 2005 to celebrate their 50th anniversary. It’s located in about 28 metres of water on the way to the Um El Faroud off Weid iz Zurrieq in Malta, one of the most magnificent wreck dives in the Mediterranean, and as such provides a useful navigational aide.

The statue is a navigational aid to finding the Um El Faroud shipwreck
The statue is a navigational aid to finding the Um El Faroud shipwreck

While we’re on the subject of diving helmets, here are two more that we found on our travels…

The dive details below are for the dive on the Um El Faroud during which we visited the plaque.

The statue depicts an old fashioned diving helmet
The statue depicts an old fashioned diving helmet

Dive date: 5 August 2011

Air temperature: 31 degrees

Water temperature: 22 degrees

Maximum depth: 34.3 metres

Visibility: 20 metres

Dive duration: 49 minutes

Six years of encrustation does not amount to much in these waters
Six years of encrustation does not amount to much in these waters
Tony behind the monument
Tony behind the monument

Newsletter: Diving and surfing

Hello divers

What would a diving newsletter be without a weather rant. RANT. Big swells, rain and a fair bit of wind have hampered diving the last week or so. The surfers have had some amazing waves at Dungeons, huge is a better way of putting it. There has been a fair amount of northerly wind so the visibility at Long Beach yesterday was a good 10 metres and the water was 14 degrees. The weekend looks windy and a huge swell will again pass by but False Bay should be okay for a few dives. We are diving the Smits wrecks on Saturday deepish 35 meters and then going to Roman Rock. Sunday we hope to do shore entries providing the wind holds off.

Clare and I attended an interesting talk at the Save Our Seas Shark Centre last night on the bull shark research program being run in the Breede river. This was the third talk in the series and they all cover different topics, shark related. The The talks we have attended at Dive Action – about diving medicine and the sardine run, amongst other things, have also been very good so if you are keen to join us for any of them mail me and I will keep you on the list for future talks. If you have not visited their site do it now here

Sadly there have been a few fatalities around the world in recent weeks and the shark is once again taking the heat. The Russian and the Seychelles governments are on a “hunt them down” campaign. A marine biologist friend of mine in the Seychelles tells me people are behaving like lunatics. Closer to home, the Plett incident has thankfully not become a frenzy as yet and I think this is largely due to the fact there are several organisations, like Save Our Seas, doing a lot of work on awareness campaigns. I find it constantly amazing that every time there is a shark attack the media will say it was a great white without a shred of proof.

This weekend we are running Nitrox (Enriched Air) courses, Deep Specialty and Advanced diver while on the boat and will continue with Open Water diver courses on Sunday. We are starting new Open Water students next weekend and a new Advanced diver course. There is always space for you!!! I would also like to do some night diving soon as it has been a while since the last one. Come and test your navigational skills by moonlight and see what the ocean keeps hidden by day.

We are trying to decide where to go for our next trip, the options are Durban and Aliwal Shoal, Sodwana Bay or southern Mozambique. Text me your preference, it does not have to mean you are coming with, it will just give me an indication of what most of you on this mailing list would prefer.

A reminder that if you want to join us on 17 September cleaning up Hout Bay harbour (underwater, of course!) with OMSAC, visit the OMSAC home page to get registration details.

I have no idea of how many of you read the blog but many of you feature on the blog. Just type your first name into the search field in the top right hand corner and sit back and enjoy the fame!!! Should you not appear it means you have not done enough diving in the last year… And you all know who you are…

And, finally, just a reminder about your MPA permits. If you don’t have one, go and get one before you come diving. At the Post Office. Do it!

Be good, have fun, and get wet.

Tony Lindeque
076 817 1099
www.learntodivetoday.co.za
www.learntodivetoday.co.za/blog
Diving is addictive!

Project Dome Port

The front of the dome port
The front of the dome port

The camera I use most often is a Bonica Snapper HDDV 1080. It took me a while to come to terms with the camera (keeping it steady) but the camera is amazing and the picture quality is exceptional.

The dome port before modification
The dome port before modification

I have long been a fan of over/under or split shots but have had very little success with any of the cameras I have owned. This has been due to the lack of a dome port. I decided I would fit a dome port to the Bonica using one that I had purchased some years ago but never got to use due to the theft of the housing it was purchased for.

The housing with the wide angle lens attached
The housing with the wide angle lens attached

Using the Bonica wide angle lens I had the outer edge of the lens machined with a thread.

Wide angle lens with the adaptor screwed on
Wide angle lens with the adaptor screwed on
The adaptor screwed into the dome port
The adaptor screwed into the dome port

I then had the mounting tube for the dome port removed (it screws out) and had a boss turned with the same outer thread as the dome port mounting tube on the outside and the inside was machined with a thread matching the one on the outside of the wide angle lens.

The adaptor to connect wide angle lens and dome port
The adaptor to connect wide angle lens and dome port

The machining was done by Brian Murray, a regular at False Bay Underwater Club who is brilliant at precision tasks like this one (although I had to beg him to do it – he doesn’t like working on camera gear)!

The wide angle lens screwed into the dome port
The wide angle lens screwed into the dome port

The wide angle lens now screws into the adaptor which in turn screws into the dome port. Each step is sealed with a O ring to keep the water out.

Top to bottom: wide angle lens, machined adaptor, dome port, lens hood
Top to bottom: wide angle lens, machined adaptor, dome port, lens hood

Due to the weight of the dome port I decided on a small support bracket underneath as I was concerned the dome port, if bumped, could snap off the nose of the housing. The support screws into the same mounting hole for the video light arm.

Support brace for the dome port
Support brace for the dome port

Ready for testing!

Ready for action
Ready for action

 

Newsletter: Artificial reef, storms, and Coastal Cleanup

Hi divers

The weather has been kind this week and we had really good diving on Tuesday and Wednesday. The Cape water took a little getting used to again for me because the last dive I did in Malta was in 24 degree water…

Conditions this week were clean and clear
Conditions this week were clean and clear

But when we dived on Wednesday we visited the artificial reef we are working on at Long Beach, and it showed a lot of happiness and life. It is amazing how quickly and thoroughly the items we placed in the water have been colonised.

International Coastal Cleanup Day

Saturday 17 September is International Coastal Cleanup Day, and this year we will again be joining OMSAC as they clean up Hout Bay Harbour. Each diver is issued with a mesh bag, and collects garbage from the dive location. A bit of judgment is required, because sometimes a piece of junk has been so grown over and inhabited by marine life that you’d do worse removing it than if you just left it there! If you’ve driven through Hout Bay Harbour on the way to a dive site in the Atlantic, you’ll know it’s usually sheltered, calm, and visited by massive seals!

This is an opportunity to dive in a place you wouldn’t usually be able to, and to do something good for the environment. It’ll be easy, shallow diving and there will be food on sale and a nice crowd of people to meet. Clare and I participated in their clean-up of Robben Island Harbour last year, and it was an incredibly well organised and enjoyable day out.

A small shyshark has made one of the coffee jars his home
A small shyshark has made one of the coffee jars his home

Registration is R25 and if you want to come along you must arrange this directly with OMSAC. There is more information about how to register on the OMSAC home page.

Weekend diving

Diving this weekend is difficult to predict because of the weather. A large storm is expected on Sunday/Monday which brings massive swell and strong winds. The boats are not going out, but anyone who wants to dive please let me know, and if conditions permit on Saturday we will find a sheltered shore entry or two to explore.

Courses

I am currently busy with Deep and Nitrox Specialty courses, and have Open Water courses on the go too. If you’d like to further your training, you know how to contact me!

regards

Tony Lindeque
076 817 1099
www.learntodivetoday.co.za
www.learntodivetoday.co.za/blog

Diving is addictive!