Page 64 - Amphibian
P. 64

Conservation                                                          YOUNG
                                                                                                         NATURALIST
                                                                                                          Caring young
                                                                                                           naturalists
                                                                                                            help to save
                                                                                                            amphibians,
                                  The problems people cause by destroying                                    by raising
               HELPING HAND       habitats – for example, cutting down rain                                  tadpoles
          Madagascan tomato frogs are                                                                        from frog
           endangered. They have been   forests, filling in natural ponds, taking water                      spawn and
           bred in captivity successfully,   from rivers for industrial use, acid rain                        releasing
          so if wild populations become                                                                        them into
           extinct, they will still survive.  pollution, global warming, and lowering                          garden
                                  the levels of fresh water – all threaten                                     ponds.
        amphibian survival. People must change their attitude to the
        environment and wildlife. Like all animals, amphibians have a right
        to live undisturbed in their natural habitats. Conserving natural
        habitats and creating places for amphibians in gardens and parks
        will help ensure their continued survival. Studying amphibians and
        informing people about them help their conservation and
        show how important frogs, toads, newts, salamanders, and
        caecilians are in the beautiful natural world around us.





                                       DOING TOO WELL!                                          POND
                                        Introducing foreign species into a country               PREDATOR
                                         can be harmful – they may compete with                  Dragonfly larvae
                                           the native amphibians. In 1935, the        are found in ponds and streams.
                                            marine toad was introduced into      They are greedy predators and eat frog
                                             Australia to control the cane beetle   tadpoles and smaller newt larvae using their
                                             infecting the sugar cane. This toad   extended jaws. They should not be introduced
                                             has bred so successfully that it has   into small ponds that contain amphibian larvae.
                                             become a serious pest in coastal
                                              areas of Queensland and northern
                                              New South Wales.

                                                                                                                 Frog
                                                                                                                 tadpole


                                           Pond snail keeps
                                           water free of too
                                           much algae


              Tadpole feeding on a   Newt larva feeds
              small piece of meat –  on water fleas
              it also eats boiled
              lettuce leaves














                                                 Water
                                                 boatman
                                                                                                               Newt larva
                                                                                                              develops front
        A TANGLE OF TADPOLES
        Raising tadpoles from frog                                                                           legs first; frogs
        spawn and seeing them transform into small adults is   Waterweed                                      develop hind
        fascinating. Sensitive to pollution and acid rain in fresh water,   provides oxygen to                   legs first
        tadpoles are good indicators of change in the environment.  keep pond water fresh

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