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Reputation Redeemed – Asp Cleared of Responsibility for Cleopatra’s Death

July 19, 2010 Comments Off on Reputation Redeemed – Asp Cleared of Responsibility for Cleopatra’s Death 6221 Views

Egyptian CobraA 2,000 year-old-legend holds that Cleopatra, famed last Queen of Egypt, committed suicide by allowing an Asp, or Egyptian Cobra (Naja haje), to bite her.  A recent study at Germany’s University of Trier, however, has now called this story into question.

Plant Poison or Snake Toxin?

By analyzing ancient Egyptian papyrus scrolls and a Roman historian’s account of Cleopatra’s demise, German toxicologists have concluded that a lethal mixture of plant poisons, and not a venomous snake bite, was the more likely suicide agent.  Read More »

Live Bloodworms – An Important Food for Small Amphibians and Their Larvae

July 16, 2010 2 Comments 12356 Views

Freeze-dried BloodwormsThose of us who keep and breed small aquatic amphibians usually have a difficult time providing our pets with dietary variety.  This is especially true as regards salamander larvae and other creatures that usually accept only live foods.  In most cases, such animals must make do with the pet trade staples, Brine Shrimp and Blackworms.  Today I’d like to introduce a useful aquatic food item that is popular with aquarists but often over-looked by herp keepers – the Bloodworm (Chironomus spp.).

Natural History

Bloodworms resemble, but are unrelated to, aquatic worms.  Rather, they are the larvae of tiny flying insects known as Midges (often called “Gnats”) of the Family Chironomidae.  They have long been sold in stores specializing in tropical fishes, and can also be ordered from internet dealers.  Read More »

Egg Retention (Dystocia) in Turtles – the Problem and Some Solutions – Part 1

July 14, 2010 3 Comments 11753 Views

One of the most common and serious problems faced by turtle keepers involves female turtles (mated or unmated) that develop eggs but refuse to deposit them in the terrariums or aquariums in which they live.  While this can be the result of any number of health problems (i.e. low calcium levels, tumors), the lack of an appropriate nesting site is more often than not the cause.

Retained Eggs

It’s very difficult to keep turtles, especially semi-aquatic and aquatic species, in an enclosure that allows for year-round access to a nesting site.  Providing a terrestrial nesting site, as well as adequate swimming space, usually involves the use of a pool or pond as opposed to an aquarium.  Read More »

Constructing a Rain Chamber – the Ultimate Amphibian Breeding Technique

July 12, 2010 26 Comments 18600 Views

Frog in frogspawnExposing frogs, toads and salamanders to an artificial “rainy season” is hands down the surest method of encouraging captive breeding in most species.  Fortunately, even someone with my limited building skills can easily construct a simple rain chamber.

Timing and Temperature

Before placing potential breeders into a rain chamber, it is important to research the species’ natural history, as timing, temperature and other factors are important considerations.  For example, Smoky Jungle Frogs (Leptodactylus pentadactylus) and certain other tropical Anurans have surprised me by breeding at nearly any time of the year, and without temperature manipulations, but Wood Frogs (Rana sylvatica), Marbled  Salamanders (Ambystoma opacum) and other temperate zone amphibians need a cooling-off period beforehand.  Read More »

Reptile Intelligence – Red-Footed Tortoises Learn by Imitation

July 9, 2010 10 Comments 14560 Views

Red footed TortoiseReptile enthusiasts have long known that tortoises are highly intelligent, and quickly modify their behaviors to meet new challenges.  Recent work at the University of Vienna (Biology Letters, March, 2010) has broken new ground in this area.  Red-Footed Tortoises (Geochelone carbonaria) have provided us with the first example of “social learning by imitation” in a reptile.

Learning by Doing

In the experiment, a hungry Red-Footed Tortoise was presented with a dilemma – in order to reach its food bowl, the tortoise needed to negotiate a screen barrier. After a great many unsuccessful attempts to reach the food, the tortoise learned to walk out of the maze and go around the barrier to retrieve its reward. Read More »

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