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Struik Nature

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Archive for November, 2015

For a Healthy iSimangaliso Wetland Park, Just Add Adders

Snakes and Snakebite in Southern AfricaSlange and Slangbyt in Suider-AfrikaA Complete Guide to the Snakes of Southern Africa'n Volledige Gids tot die Slange van Suider-Afrika

 
26 gaboon adders have been successfully released into the iSimangaliso Wetland Park on the coast about 300 kilometres north of Durban. The snakes were reared at the nearby St Lucia Crocodile and Education Centre, and are important to the health of the whole ecosystem.

Johan Marais, herpetologist and author of a number of books about snakes, told Tony Carnie a bit more about the species for an article featured in The Mercury.

Marais explained that although the venom of a gaboon adder is potentially deadly, bites are next to “unheard of, except among snake handlers”:

“The bite is not unlike that of a puff adder – potently cytotoxic causing massive swelling, pain and blistering that may result in necrosis and severe tissue damage.

“But even the puff adder accounts for few deaths, as victims usually have enough time to get to a hospital and treatment. Gaboon adders are not often encountered, very well camouflaged and fortunately reluctant to bite. They will hiss loudly to scare you off.”

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“The Oceans are Dying” – An Interview with Sylvia Earle about Saving and Protecting the Seas

South African CoastsSylvia Earle, marine biologist and advocate for healthy oceans, was recently interviewed by Ian Frazier for Outside.

Earle, who is the author of South African Coasts: A Celebration of Our Seas and Shores and a number of other successful books, believes that the oceans are in serious trouble. She spoke about the various abuses of the earth that have left much of the oceans’ former beauty “dead and rotting” and which continue to wreak chaos and destruction on marine environments.

In an attempt to make a difference to the health of the planet, Earle has established Hope Spots – “protected places in the ocean where dumping, mining, drilling, fishing, and all other forms of exploitation are prohibited” – all over the world.

Read the article:

Almost the first thing Sylvia Earle said to me was, “The oceans are dying.”

We were at a small dinner in Manhattan last fall, celebrating the New York premiere of a documentary about her called Mission Blue. As the world’s best-known oceanographer—Sylvia is to our era what Jacques Cousteau was to an earlier one—she feels a heavy responsibility. In her lifetime, she has seen the ocean damaged in ways humans never thought it could be. The ongoing disaster leaves her mournful, desolate, and sometimes scary to talk to. Since her first dive, in a sponge-diver’s helmet in a Florida river when she was 16, she has spent 7,000 hours, or the better part of a year, underwater. In the depths, swordfish and bioluminescent fish and humpback whales in midsong have swum by her, done a double take, and stopped to check her out. From her life’s experience, she has become no longer really terrestrial. She is like a super-apex sea creature that has somehow wound up on dry land and is walking around and telling everybody about the terminal ruin humans are inflicting on her home.

Also read:

 

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News from the African Snakebite Institute: Johan Marais Explains How to Identify Mildly-venomous Snakes

Johan Marais is an internationally respected herpetologist and author of several books on snakes in southern Africa, including Snakes and Snakebite in Southern Africa and A Complete Guide to the Snakes of Southern Africa.

Snakes and Snakebite in Southern AfricaSlange and Slangbyt in Suider-AfrikaA Complete Guide to the Snakes of Southern Africa'n Volledige Gids tot die Slange van Suider-Afrika

 
Marais also runs the African Snakebite Institute (ASI), through which he offers training courses, corporate talks and demonstrations, environmental impact assessments and reptile safaris. In the latest ASI newsletter Marais focusses on mildly-venomous snakes:

“Of the 173-odd different types of snakes in Southern Africa the vast majority of species are either harmless or mildly venomous. Only nineteen snake species are considered deadly,” the snake expert writes. Examples include the Common Night Adder, the Stiletto Snake, the Berg Adder, the Many-horned Adder and the Horned Adder.

Read the ASI newsletter to find out more about these snakes, including photos to help you identify them and tips on what to do when you come across one:

While the venom of most mildly-venomous snakes like the Herald snake, Eastern Tiger snake, the various Sand and Grass snakes and the Skaapsteker has virtually no effect on humans, twenty nine snakes that are not considered deadly have rather potent venom that could cause a great deal of discomfort or even hospitalisation. Sadly many of these snakes are listed as ‘mildly venomous’ on various internet sites. This is certainly not always the case.

The Common or Rhombic Night Adder is a good example. It is abundant where it occurs in the wetter eastern parts of the country and is a frog specialist, feeding largely on toads. Gardens with water features lure frogs and the Night Adder follows. Its venom is often described as mildly cytotoxic that will cause some pain and a bit of swelling. This may be the case in some bites but not always. We see some particularly bad bites, especially on children and dogs. Night Adder venom is potent enough to kill small dogs and I recently saw a case where a Maltese Poodle was bitten on a paw and its front leg had to be amputated the following day.

ASI offers many helpful tools on their website, including downloadable posters and links to resources on snakes. Have a look:

Dangerous Snakes of Southern Africa

 

 

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New from the Astronomical Society of Southern Africa: Sky Guide Africa South 2016

Sky Guide Africa South 2016The new astronomical handbook for southern Africa, Sky Guide Africa South 2016 by the Astronomical Society of Southern Africa, is now available from Struik Nature:

Sky Guide Africa South 2016 is a practical resource for astronomers, whether they be novice, amateur or professional.

Enhanced by many photos, diagrams, charts and images, it features:
 

  • The upcoming year’s planetary movements, predicted eclipses, meteor showers – any events and facets of the night sky that change annually.
  • Star charts that plot the evening sky for each season, facilitating the identification of stars and constellations.
  • A wealth of information about the Sun, Moon, planets, comets, meteors and bright stars.
  • An excellent list of useful websites and a comprehensive glossary.

This annual publication is an invaluable resource for anyone who has even a passing interest in the night skies of southern Africa and is “… an absolute must for first-time star-gazers and professional astronomers alike”.

About the authors

Struik Nature joins forces with the Astronomical Society of Southern Africa to publish this annual guide. Now in its 64th year of publication, the book is prepared by a team of contributors, all specialists in their fields.

Visit the Astronomical Society of Southern Africa’s website.

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Join the Authors of Freshwater Life for an Interactive Book Launch at Intaka Island Eco Centre

Invitation to the launch of Freshwater Life

 
Freshwater LifeStruik Nature is pleased to invite you to the launch of Freshwater Life by Charles Griffiths, Jenny Day and Mike Picker.

Freshwater Life is a comprehensive field-guide to the plants and animals of Southern Africa – the first of its kind – and describes the ecology of more than 1 000 freshwater organisms.

Join the authors for a presentation about their book on Wednesday, 11 November, at 5:30 for 6 PM. The event will take place at the Intaka Island Eco Centre in Cape Town. Come and be bedazzled by a “live feed” microscope revealing freshwater life that most people will never see in their entire lives.

Don’t miss it!

Event Details

 

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Big Cats in the City: Laurel Seriey Discusses the Urban Caracal Project (Podcast)

Stuarts' Field Guide to Mammals of Southern AfricaStuarts se Veldgids tot Soogdiere van Suider-AfrikaA Photographic Guide to Mammals of Southern, Central and East AfricaBehaviour Briefs

 
Nature lovers confined to the city will be interested in the Urban Caracal Project, an investigation into the effect of urbanisation on these important predators.

Laurel Seriey, founder and coordinator of the project, recently spoke to Mike Wills on CapeTalk about her work. She revealed more about the aims of her research, and how ordinary people can help.

Caracals, Seriey says, are solitary animals and play a “key role in the health of the ecosystem of the Cape Peninsula”. But they are under threat because of human activities.

Listen to the podcast:

 

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