Newsletter: Electric sea

Hi divers

Weekend dive plans

No diving

We won’t be diving this weekend, and there won’t be a newsletter (or diving) next week, but we’ll be back in business after the public holiday on Heritage Day (24 September). This weekend, Saturday looks good, and Sunday ok for diving.

I launched for divers on Tuesday, and they had fairly good conditions (5-6 metre visibility at Sherwood Forest and Castle Pinnacles) but the surface conditions deteriorated as the day progressed and the wind picked up.

Bioluminescence at Fish Hoek beach
Bioluminescence at Fish Hoek beach

This past weekend, helped by the south easter and then the heat, a thick red tide got caught in Fish Hoek bay and as a result we were treated to some incredible bioluminescence (caused by a type of plankton that fluoresces when disturbed by wave action) on Saturday evening.

This occurs at least a couple of times a year, usually in spring and autumn, on this side of False Bay (and it often makes its way around to the Kogel Bay area on the eastern shore). It is an incredible sight to see. There’s a little video here (pardon the screaming – the beach was packed and the people were excited).

Anyway – see you in 10 days.

regards

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

Diving is addictive!

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Newsletter: Looks like spring

Hi divers

Weekend dive plans

Sunday: False Bay dives, conditions permitting

The tree in our driveway has a tiny green bud containing a new leaf. Despite the cold this week, I declare spring.

False Bay is quite surgy after some large swell this week, but I hope it’ll have settled down enough by Sunday for some reasonable diving. I’ll only make the call on Saturday afternoon; please let me know if you’d like to be notified of any developing plans.

Table Mountain from Rietvlei Nature Reserve
Table Mountain from Rietvlei Nature Reserve

Beach cleanups

There are at least two happening this weekend:

Sharks in False Bay

There’s a fascinating update this week from Shark Spotters on False Bay’s white sharks (spoiler: they’re awol but we’re not quite certain why yet) – read more here.

regards

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

Diving is addictive!

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Newsletter: It is what it is

Hi divers

Weekend dive plans

No diving

Black browed albatross
Black browed albatross

It is still winter – time for lots of swell, and sometimes odd wind directions. There is all of that this weekend, with too many “maybes” at play to make a diving plan. Hout Bay may work on Sunday but the same could be said for False Bay. I don’t think the odds are too good so we have nothing planned.

regards

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

Diving is addictive!

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Bookshelf: The Seabird’s Cry

The Seabird’s Cry: The Lives and Loves of Puffins, Gannets and Other Ocean Voyagers – Adam Nicolson

The Seabird's Cry
The Seabird’s Cry

This is such a wonderful book that I read it twice within the span of six months. In between my two readings, during the northern hemisphere spring, Tony and I visited Pembrokeshire in Wales. This is not the home of Mr Darcy, but rather the location of several islands on which seabirds breed. Seeing puffins, gannets and shearwaters in all their glorious breeding plumage animated Nicolson’s descriptions of their precarious lives. (I do plan to share some photos and details of that visit in future posts.)

Early in this book, Nicolson points out that seabirds are the only creatures on earth that are at home in the water, on land, and in the air. To most of us, albatross are perhaps the most familiar pelagic seabirds – Carl Safina’s Eye of the Albatross both introduced and immortalised these extraordinary ocean wanderers for a popular audience. Nicolson devotes a chapter to each of ten species of seabird, including albatross, and writes with such extraordinary lyricism that at at times it’s possible to mistake this book for something other than popular science.

This blurring of boundaries is quite intentional, and completely revelatory. Rather than sounding pretentious or foolish, as most of us would if we tried to channel Seamus Heaney while summarising scientific papers and interviewing researchers, Nicolson achieves a remarkable feat of science communication. He speaks of the wonder that comes not from ignorance, but from knowledge and understanding, and how powerful a thing it is to know the facts of these animals’ lives.

If the idea of trying to join the worlds of science and poetry (or literature, or culture) grabs you, you may enjoy this video of a conversation on the subject between Adam Nicolson and Tim Birkenhead, a professor of ornithology.

Seabirds are in trouble worldwide, more threatened than any other group of birds. They are facing – amongst others – challenges wrought by changing ecosystems as the climate warms and industrial fishing robs them of their prey. To help them, we need to act, and action comes after seeing and understanding. In this book Nicolson makes an appeal to a part of us other than the rational, fact-collecting, logical entity, and asks us to empathise with these strikingly “other” creatures. I urge you to read this book.

You can read rapturous reviews of this book on The Guardian’s website, on Literary Hub, and at the Financial Times.

Get a copy here (South Africa), or here. It is available for Kindle, but you’ll have to search for that one yourself!

Newsletter: Trawling

Hi divers

Weekend dive plans

No diving

Fishing trawler at work
Fishing trawler at work

Saturday morning looks to be the best time this weekend for a spot of diving. We are heading offshore on a pelagic birding trip / hunt for fishing trawlers which means no inshore diving for us until next week.

regards

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

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Shark Spotters in brief

The Shark Spotters centre at Muizenberg
The Shark Spotters centre at Muizenberg

I had to write a short article about Shark Spotters a while ago, for the quarterly magazine of the company I work for. It was fun to write within the constraints of quite a punitive word count, and to try and emphasise the aspects of the program that I think are poorly understood by the public. Here’s the article:

Shark Spotters developed into Cape Town’s primary shark safety strategy out of two similar, informal initiatives. At Muizenberg and Fish Hoek in 2004, surfers arranged with lifeguards, car guards and trek fishermen to warn them when sharks were sighted. Today, Shark Spotters is a NPO funded primarily by the City of Cape Town, Save Our Seas Foundation, and public donations. It operates year-round at four beaches and during summer at another four. These are beaches that have both many water users and relatively common shark sightings.

A team of 30 spotters equipped with binoculars, polarising sunglasses and all-weather gear watch from the mountainside, and when a shark is sighted they notify colleagues at the beach to sound a siren and raise the appropriate flag. The flags indicate the current or recent presence of a shark, that spotting conditions are poor, or that it is safe to swim.

The spotters, all drawn from local communities, are trained in safety, first aid and shark behaviour. A further 10 team members deploy and retrieve the shark exclusion net at Fish Hoek beach during summer. Unlike the gill nets protecting beaches in KwaZulu Natal, this net does not catch sharks. It provides a physical barrier between sharks and swimmers. It is designed to be retrieved at the end of the day, or, to prevent entanglement, when there are marine mammals nearby. The Fish Hoek shark exclusion net is unique worldwide as an environmentally friendly shark attack mitigation measure.

It is the combination of favourable topography and surface-swimming sharks that makes Shark Spotters’ work possible and effective. The land around many of Cape Town’s beaches slopes steeply towards the sea, providing raised vantage points from which to spot. The sharks which pose the primary danger to water users, because of their size and curious natures, are great white sharks. Fortunately these sharks spend much time swimming on the surface, and their distinctive swimming style is readily recognisable.

Shark Spotters also conducts research on sharks to improve safety measures and provide management and conservation recommendations. As a result, the movements of great white sharks in False Bay are well understood. Sharks visit the beaches year-round, but with a distinct seasonal pattern. During winter the sharks congregate at Seal Island to feed on juvenile seals. During summer, sharks head for the backline of Cape Town’s beaches – probably to feed on the fish species found in False Bay at this time, and to rest in the highly oxygenated water close to shore. This is when they pose the greatest risk to water users.

Why support Shark Spotters?

I love the fact that Shark Spotters combines care for people with concern for the environment. The program takes a scientific stance backed by research, and has attracted worldwide recognition. It also provides training and employment for 40 residents of some of Cape Town’s most impoverished communities. I sit on the non-executive committee as a representative of Cape Town’s scuba diving community, and it’s a privilege to work with fellow water users and ocean lovers, and hopefully to provide a benefit to the greater community through our small contribution.

For more information, visit www.sharkspotters.org.za.

(Of course, lately white shark movements in False Bay are slightly less well understood than they have been, probably thanks to a pair of orcas whose irregular visits to Seal Island and Millers Point to hunt white sharks and sevengills seem to clear out the neighbourhood a bit! Fear not, Shark Spotters’ research is aiming to understand these changes, too.)

Newsletter: Wait and see

Hi divers

Weekend dive plans

Sunday: Shore dives in False Bay

Cape fur seals at Kalk Bay harbour
Cape fur seals at Kalk Bay harbour

There is a fair amount of swell around right now, combined with strong winds. Although False Bay looks a little scrappy, the water colour remains good. Sunday looks like the best, or only, option for diving, but we will most likely shore dive. I will wait until Saturday mid afternoon to make the call. Get in touch if you wish to join.

regards

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

Diving is addictive!

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Bookshelf: Beachcombing in South Africa

Beachcombing in South Africa – Rudy van der Elst

Beachcombing in South Africa
Beachcombing in South Africa

Why so quiet? What have we been doing? Working, mostly. Trying to stay alive. And a bit of reading, and some beachcombing. Enter this is marvellous little book from fish fundi Rudy van der Elst (A Field Guide to the Common Sea Fishes of South Africa).

Chapter by chapter, van der Elst describes the types of debris that one might find on a beach. After a brief orientation chapter covering the ocean current regime around South Africa, relevant regulations, safety, beach ecology, tides, pollution and more, we launch into a tour of washed-up treasures.

Predictably, many of the items to be found are organic in nature – plants, invertebrates of various types, eggs and egg cases, fishes, birds, and shells. There are also items such as oceanographic devices, tags from marine animals, fishing equipment, cyalumes, buoys – some of these (such as tags) should be returned to their owners, and others should be removed from the vicinity of the ocean (such as discarded fishing nets and lines).

The chapter on marine animals (resting, nesting and stranded) is exceptionally useful and it is almost for this alone that I’d like to put a copy of this book in every home in every coastal town in the country. Seals, whales, turtles and seabirds can end up on the beach, sometimes in difficulty and at other times not. It can be hard to tell, and well-meaning members of the public can unwittingly cause great harm while trying to assist. A list of useful contacts in this regard appears at the end of the book, such as the Two Oceans Aquarium and the SPCA (region-specific).

The final two chapters cover miscellaneous “treasures” such as fossilised sharks teeth, sea glass, logs, and actual treasure, as well as beachcombing through the ages in South Africa. Here we learn about tidal fish traps, coastal caves, and other historical coastal dwellers who made their living from the sea.

We’ve found some awesome things on the beach, from shipwrecks to goose barnacles to rare crabs. Beachcombing is an accessible hobby that requires nothing but time, observation skills, curiosity, and a beach to stroll on.

This is a beautifully illustrated, comprehensive little volume that deserves to come with you on your beach holiday. It’ll prompt more careful examination of the flotsam and jetsam on your local beach, and, probably, more early morning low-tide visits to find the best pickings!

Wild Card magazine featured this book when it was published. Get it online here if you’re in South Africa, or here for your Kindle.

Newsletter: Just swell

Hi divers

Weekend diving

No dives planned  

Anemone at the Two Oceans Aquarium
Anemone at the Two Oceans Aquarium

Given the time of year, the large swells we are having are not all that unusual. Neither is the odd day or two of south easterly wind. Friday and Saturday feature both these gremlins, so conditions won’t really be great. Sunday’s forecast is a little rosier, however I doubt the visibility will have recovered and the surge will still be a lingering factor. This weekend my choice is to stay home.

regards

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

Diving is addictive!

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Bookshelf: Seaweed Chronicles

Seaweed Chronicles: A World at the Water’s Edge – Susan Hand Shetterly

Seaweed Chronicles
Seaweed Chronicles

This is one of the best kinds of popular science book. It reads so easily that by the time you’ve absorbed enough material to attain a diploma in phycology (the study of seaweed), you also feel as though you’ve met and befriended a varied cast of individuals whose lives revolve – in various ways – around slippery marine algae.

It’s written by an American author, and the book centres squarely on the coast of Maine in the United States, obviously much loved by the author. It’s not clear initially that the geographical focus of the book is so narrow; some readers may want to know this in advance. While reading, I was grateful for the perspective that a Veld and Sea seaweed foraging course gave me on our local seaweeds.

Vignettes of seaweed-centred lives, from foragers turned businesspeople, to scientists, to shepherds whose flocks feast on seaweed during their coastal sojourns, introduce us to a cast of characters illustrating the many uses and commercial possibilities of seaweed, as well as the management and conservation challenges associated with its harvest. Seaweeds are pivotal in coastal ecosystems, providing vital habitat and sustenance. This isn’t just a science book (which some may find frustrating). It’s as much about the people as about the seaweed – but you will learn some science from it!

There’s a good review here at the New York Journal of Books.

Get the book here if you’re in South Africa, otherwise here.