LOVE THEM Or HATE THEM?
INVASIVEINVASIVE DECAPODSDECAPODS LOVELOVE THEMTHEM oror HATEHATE THEM?THEM? DavidDavid HoldichHoldich TheThe intentionalintentional oror accidentalaccidental introductionintroduction ofof invasiveinvasive speciesspecies isis secondsecond onlyonly toto habitathabitat destructiondestruction inin causingcausing thethe globalglobal lossloss ofof biodiversity.biodiversity. AquaticAquatic systemssystems presentpresent fewfew barriersbarriers toto thethe spreadspread ofof invasiveinvasive speciesspecies onceonce theythey becomebecome establishedestablished (Cook(Cook && Clark,Clark, 2004).2004). However,However, littlelittle emphasisemphasis hashas beenbeen putput onon thethe considerableconsiderable impactimpact thatthat decapoddecapod crustaceanscrustaceans cancan havehave onon inlandinland waters.waters. Global Strategy on Invasive e.g.e.g. Global Strategy on Invasive AlienAlien Species.Species. McNeelyMcNeely etet alal.. (2001).(2001). IUCNIUCN Gland,Gland, Switzerland,Switzerland, andand Cambridge,Cambridge, UK,UK, inin collaborationcollaboration withwith thethe GlobalGlobal InvasiveInvasive SpeciesSpecies Programme.Programme. OneOne briefbrief mentionmention ofof invasiveinvasive decapods,decapods, i.e.i.e. crayfishcrayfish escapingescaping fromfrom aa LondonLondon fishfish market!market! ApproximatelyApproximately 10,00010,000 speciesspecies ofof decapoddecapod crustaceans,crustaceans, whichwhich includeinclude thethe prawns,prawns, shrimps,shrimps, lobsters,lobsters, crabscrabs andand crayfish.crayfish. ManyMany havehave aquaculturalaquacultural
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