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Yearly Archives: 2010

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

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

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

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 »

Introducing the Nosy Be Gecko (aka Spearpoint Leaf-tailed Gecko), Part 1

The Nosy Be Gecko (Uroplatus ebenaui) is one of the most interesting recent newcomers to the pet trade.  However, its unique appearance should not prompt you into a quick purchase, as we have a great deal yet to learn about its care.  Today I’d like to review its natural history, as therein lay the key to its proper captive care.  In Part II of this article we’ll look at some of \this lizard’s interesting relatives. Read More »

The Natural History and Captive Care of the Smokey Jungle Frog – Part 2

Smokey Jungle FrogPlease see Part 1 of this article for information on the natural history, amazing reproductive biology (including terrestrial nesting) and captive breeding of the Smokey Jungle Frog (a/k/a South American Bullfrog, Leptodactylus pentadactylus).

Diet

The hefty, robust adults are capable of taking quite large prey, including small birds, snakes, other frogs, mice and other rodents, scorpions and tarantulas as well as earthworms, roaches, moths and other invertebrates.

Smokey Jungle Frogs they are one of the few animals known to consume the highly toxic Poison Frogs, Dendrobates spp.

I’ve had good success with a diet comprised largely of earthworms, roaches, crickets and wild-caught insects (please see my article on Collecting Feeder Insects).  I use shiners and crayfishes as a calcium source, but a pink mouse may be offered every 6-8 weeks if desired. Read More »

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