Popular Amphibians. Philippe De Vosjoli
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failure to feed, watery feces, weight loss, discolored skin patches, and cloudy eyes are all signs of possible disease.
Most of the amphibians covered in this book can be quarantined in 10-gallon tanks with screen tops. In general, aquatic species fare well in bare tanks with a sponge filter, a few potted aquatic plants, and an underwater shelter. For semiaquatic species, such as newts or floating frogs, use partially filled tanks with islands made of inverted flower pots with a piece of cork and strands of elodea (Egeria densa) as temporary housing. Keep land dwellers such as tiger salamanders on moistened green moss and provide them with a shelter and a shallow water container. Read the chapter about housing for further details.
In this quarantine setup for most newts, a Foam Home polyurethane foam background provides surface areas and hollows that make the newts feel more secure. A section of cork was wedged between the foam and front glass to allow access to land.
Inexpensive utility sinks are invaluable for quarantining groups of newts or frogs. A screen cover is required for frogs and recommended with newts and salamanders to prevent escape.
A quarantine setup for semiaquatic frogs should have a low level of water, and cork bark or foam platforms. Place white paper under the tank to monitor the state of the feces. If a large foam platform and cork bark shelters are used, this system will also work well for various salamanders. Make sure you have a secure lid.
The substrate of this simple setup for quarantine of terrestrial and semiaquatic salamanders is a gravel bed covered with moist green moss. Cork bark shelters are placed on the moss and a shallow and easily accessible water container is sunk into the gravel. This kind of setup can also be used with semiterrestrial and terrestrial frogs, such as leopard frogs, rice paddy frogs, and even fire-bellied toads. The moss must be kept moist.
Non-release Practices
Never release unwanted or sick animals into the wild. It is illegal. Moreover, most released amphibians do not survive. In addition, there is a chance that you could threaten native wildlife by exposing them to foreign pathogens. Unwanted pets should always be sold or given to pet businesses, other hobbyists, or animal shelters—never released. Unwanted sick amphibians are best euthanized.
CHAPTER 3
HOUSING
Enclosures
The best enclosures for keeping amphibians are all-glass tanks with sliding screen tops or aquaria with screen tops. Open-top aquaria work for some aquatic species, such as dwarf underwater frogs and axolotls, as long as the water level remains at least a couple of inches below the top of the tank. Floating frogs can be housed safely with dwarf clawed frogs in half-filled tanks.
The plastic terrariums commonly recommended for keeping frogs and newts can be used as temporary housing and for quarantining smaller amphibians, but they are unsuitable as display enclosures. Plastic terrariums become easily scratched and unsanitary, and they have no visual appeal. When keeping frogs and newts, the saying “glass has class”holds true.
This display by Reptile Haven (Oceanside, CA) won first prize in the aquatic division at the 2000 IRBA Vivarium show in San Diego. It housed several paddle-tailed newts. The background was a polyurethane Foam Home unit. In the center, a weighted cork round was planted with cryptocorynes. Java fern and anubias were anchored to the foam background. A powerhead in the foam unit acted as a filter and current generator.
If you have limited space, such as a desktop, start with a tank as small as 2 gallons for tiny species such as dwarf clawed frogs, floating frogs, or Oriental fire-bellied newts. For the other species covered in this book, you’ll need at least a 10-gallon tank, though larger tanks—20 gallons or more—are preferred. In larger tanks, the quality of water and substrate (bottom material) remains more stable and requires less maintenance. The animals also utilize the extra space.
The importance of screen tops for most amphibians cannot be emphasized enough. Thousands of captive frogs and newts end up as mummified dust balls because their owners failed to provide an aquarium cover. Most newts, salamanders, toads, and frogs can escape an uncovered tank—and once they do, they will not survive.
Shallow Shoreline Vivarium
For semiaquatic species, such as Oriental fire-bellied toads and newts, gravel bed shoreline vivaria might be the easiest setups to design and maintain. As the name indicates, this type of vivarium includes a substrate of gravel that simulates the shoreline of a stream or pond, combining equal areas of shallow water and land. To create this kind of setup, first pour a 1- to 2 ½-inch layer of a washed ¼- to ½-inch diameter aquarium gravel or fired clay substrate used for growing aquatic plants. The next step is to shift part of the substrate to one side and create a depression. This area will become the water section. For most species, this depression should cover ⅓ to ½ of the floor surface, depending on the habits of the animals you plan to introduce (less for primarily ground-dwelling species, more for primarily aquatic ones). The depression should be 3 to 4 inches deep. Landscape the land/gravel area with rocks, wood, and plants. Add small sections of wood and smooth pebbles along the water’s edges to give the vivarium character and to hold the gravel in place. Leave open areas for easy access to and from the land area.
Select plants that grow well hydroponically (in water), such as Chinese evergreen (Aglaonema sp.), pothos, arrow-head plants (Sagittaria spp.), and variegated Wandering Jew (Zebrina pendula). These can be planted in the gravel land sections. Simply remove plants from their pots, wash their roots free of soil, and insert them into the gravel layer. Then add cork bark sections to the land area to provide shelters and dry platforms. Cover the exposed gravel on the land with moistened green moss. Add water to the gravel depression, to a level about two-thirds the height of the land section.
One or two bulbs in a fluorescent fixture running the length of the tank provide the necessary light. For species that like to bask, such as fire-bellied toads or leopard frogs, place an additional low-wattage bulb in a small reflector-type fixture over a basking site, such as sections of wood, rock, or an open gravel area.
This shallow shoreline vivarium was designed to include treefrogs and anoles.
Gravel bed vivaria are easy to set up and can be very decorative. In this setup, round pebbles line the edge of the water section.
Weekly Water Changes
The water in a shoreline vivarium should be changed weekly. In small setups, use a turkey baster to remove the water. With deeper water, use a siphon or, even better, a manual sump pump. Before siphoning or pumping old water, pour additional water over the land area to lightly flush the gravel surface and to drive waste into the water section. When replacing the water, pour new water into the water section, not the land area, so that it is relatively clean and free of debris.
The water in this shoreline tank is being drained with a manual boat bilge pump. You can also use siphons and industrial vacuum cleaners for this purpose. Whatever you do, never start a siphon using your mouth.
Flushing
At least once a