Page 81 - World of Animals - Issue #39
P. 81

Sawfi sh

                                           56
                  50          72       million years   2007              Where in the world




                Sawfish are a   Individual sawfish   The fossil record   The year   Sawfish are found in shallow tropical waters across the world, however their range



               long-lived species   representing   for the ancestors of   sawfish gained   has significantly decreased due to threats such as overfishing and habitat loss

               and can live to the   four species are   the sawfish species   international
                ripe old age of  currently in public   alive today dates   protection from
                50 in the wild.  aquariums.   back...   trade.










                                                                                                  Historical
                                                                                                  Current

                                                                                                    Saving the saws
                                                                                                    Katy Duke is curator at The Deep in Hull and

                                                                                                    manages the sawfish studbook for the zoo
                                                                                                    and aquarium community
                                                                               Sawfi sh all

                                                                             belong to the                   Why are sawfish important?
                                                                            family ‘Pristidae’, a            They are the most endangered
                                                                            word derived from                family of sharks on the planet.
                                                                             the Greek word                  They’ve had a tough ride!
                                                                               for ‘saw’.
                                                                                                    Is there a captive breeding program?
                                                                                                    Of the five species, four are represented in

                                                                                                    aquariums globally. One of those species,
                                                                                                    Pristis pectinata (smalltooth sawfish) is


                                                                                                    the first one that has been bred, but there
                                                                                                    are none of those within Europe so we are
                                                                                                    still waiting. We believe that our animals
                                                                                                    [in Europe] are becoming sexually mature,
                                                                                                    we think, around 15 years of age. Captive
                                                                                                    breeding is the kind of thing that aquariums
                                                                                                    can offer – especially when it comes to data

                                                                                                    sharing. Aquariums are really well placed

                                                                                                    to be able to offer data that can’t really be
                                                                                                    studied in the wild.

                                                                                                    What else can be done?

                                                                                                    In the field, work is being done to discover
                                                                                                    where populations are at the moment. In a
                                                                                                    lot of places it’s surveying local communities
                                                                                                    to try and find out whether they’re still seeing

                                                                                                    Pristis in their waters, and talk about where
                                                                                                    the numbers are declined over the years
                                                                                                    and so on. Awareness-raising is a big one
                                                                                    16-37 pairs of   because still in a lot of countries they are still
                                                                                    ‘teeth’ on their

                   The delicate and intricate rostrum becomes easily                rostrum, which   fished and caught and eaten.
                   entangled in discarded fishing nets, posing a huge                 are actually

                             risk to the fish.                                      modified scales.   How can readers help?


                                                                                                    Help the ‘See-A-Saw’ campaign – the Sawfish

                                                                                                    Conservation Society are collecting data from
                                                                                                    old rostrums. The campaign is asking people
                        28%          42          92           16          21          ½             who see these old ‘curios’ to report that data

                                                                                                    to the Sawfish Conservation Society, because
                        The snout, or   The number of   The number   Countries protect   The number of   Unfortunately,   we can gain all kinds of data from this, even  © Norbert Wu/Minden Pictures/FLPA
                                                                                                    DNA samples!
                      ‘rostrum’ takes up   countries that   of countries in   sawfish by law.   countries that   sawfish are now




                      around a quarter   have lost at least   which sawfish   It’s illegal to fish   have completely   extinct in half


                       of the sawfish’s   one of their native   species are or   for them as they   lost sawfish from   of their former   For more information, head to
                        total length!  sawfish species.  were present.  are endangered.  their waters.  range.  sawfishconservationsociety.org


                                                                                                                               81
       080-081_Sawfish in Numbers.indd   81                                                                                  12/10/2016   17:41
   76   77   78   79   80   81   82   83   84   85   86