澳洲龙虾

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外刊阅读海洋保护区如何影响龙虾的进化 [复制链接]

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原文标题:FisheriesLobsterbriskProtectedareasaffectlobsterevolutioninawaythathelpsfisherfolk[Paragraph1]CREATEAPLACEofsafetyinwhichmarinelifecanmultiply,andtheoverspillintonearbyunprotectedareaswillprovidemorequarryforfisherfolkthanifnosuchzoneexisted.Thatisthetheory,anyway.Andpracticesuggestsitworks.However,theadvantagemaybemorethanamereincreaseinnumbers.Astudyoflobsterssuggeststhat,forthesecreaturesatleast,marineprotectedareas(MPAs),astheyareknownformally,alsoreverseanevolutionarytrendtowardssmallerindividualswhichfishingimposes,thusbenefitingthemenandwomenintheboatstwiceover.

[Paragraph2]TheresearchinquestionwasconductedbyTonjeSordalenoftheUniversityofAgder,inNorway,andispublishedthisweekintheProceedingsoftheRoyalSociety.DrSordalenstartedfromthefactthatforseveralspecies,lobstersincluded,growthratesandboldnessofbehaviourseemtogohandinhand,suggestingtheyarepromotedbythesamegenes.Why,isnotclear.Onehypothesisisthatfaster-growingindividualsneedtospendmoretimeandeffortsearchingforfood.[Paragraph3]Unfortunatelyfromalobster’spointofview,suchboldnessmayincludeatendencytoexplorelobsterpots.Certainly,thatistruefortheirfreshwatercousins,crayfish,wherebig,adventurousindividualsaremorelikelytoendupintraps.Andthat,inturn,createsaselectivepressurefortimidity,toavoidgettingtrapped—withsmallbodysize

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