首页 >出版文学> The Variation of Animals and Plants under Domestic>第12章
  liviapresentsseveralwildforms,regardedbysomenaturalistsasspeciesandbyothersassub—speciesorasmerevarieties,butthatthespeciesofseveralalliedgeneraareinthesamepredicament。Thisisthecase,asMr。
  Blythhasremarkedtome,withTreron,Palumbus,andTurtur。),andstillmoresowhensemi—domesticated,asshownbycomparingtheSierraLeonepigeonswiththoseofIndia,orwiththosewhichapparentlyhaverunwildinMadeira。Ithasundergoneastillgreateramountofvariationinthecaseofthenumeroustoy—pigeons,whichnoonesupposestobedescendedfromdistinctspecies;yetsomeofthesetoy—pigeonshavetransmittedtheircharactertrulyforcenturies。Why,then,shouldwehesitatetobelieveinthatgreateramountofvariationwhichisnecessaryfortheproductionoftheelevenchiefraces?Itshouldbeborneinmindthatintwoofthemoststrongly—markedraces,namely,CarriersandShort—facedTumblers,theextremeformscanbeconnectedwiththeparent—speciesbygraduateddifferencesnotgreaterthanthosewhichmaybeobservedbetweenthedovecote—pigeonsinhabitingdifferentcountries,orbetweenthevariouskindsoftoy—pigeons,——gradationswhichmustcertainlybeattributedtovariation。
  Thatcircumstanceshavebeeneminentlyfavourableforthemodificationofthepigeonthroughvariationandselectionwillnowbeshown。Theearliestrecord,ashasbeenpointedouttomebyProfessorLepsius,ofpigeonsinadomesticatedcondition,occursinthefifthEgyptiandynasty,about3000
  B。C。(6/31。’Denkmaler’abth。2bl。70。);butMr。Birch,oftheBritishMuseum,informsmethatthepigeonappearsinabilloffareinthepreviousdynasty。DomesticpigeonsarementionedinGenesis,Leviticus,andIsaiah。(6/32。’The’Dovecote’bytheRev。E。S。Dixon1851pages11—13。
  AdolphePictet(inhis’LesOriginesIndo—Europeennes’1859page399)
  statesthatthereareintheancientSanscritlanguagebetween25and30
  namesforthepigeon,andother15or16Persiannames;noneofthesearecommontotheEuropeanlanguages。ThisfactindicatestheantiquityofthedomesticationofthepigeonintheEast。)InthetimeoftheRomans,aswehearfromPliny(6/33。Englishtranslation1601book10ch。37。),immensepricesweregivenforpigeons;"nay,theyarecometothispass,thattheycanreckonuptheirpedigreeandrace。"InIndia,abouttheyear1600,pigeonsweremuchvaluedbyAkberKhan:20,000birdswerecarriedaboutwiththecourt,andthemerchantsbroughtvaluablecollections。"ThemonarchofIranandTuransenthimsomeveryrarebreeds。HisMajesty,"
  saysthecourtlyhistorian,"bycrossingthebreeds,whichmethodwasneverpractisedbefore,hasimprovedthemastonishingly。"(6/34。’AyeenAkbery’
  translatedbyF。Gladwin4toeditionvolume1page270。)AkberKhanpossessedseventeendistinctkinds,eightofwhichwerevaluableforbeautyalone。Ataboutthissameperiodof1600theDutch,accordingtoAldrovandi,wereaseageraboutpigeonsastheRomanshadformerlybeen。
  ThebreedswhichwerekeptduringthefifteenthcenturyinEuropeandinIndiaapparentlydifferedfromeachother。Tavernier,inhisTravelsin1677,speaks,asdoesChardinin1735,ofthevastnumberofpigeon—housesinPersia;andtheformerremarksthat,asChristianswerenotpermittedtokeeppigeons,someofthevulgaractuallyturnedMahometansforthissolepurpose。TheEmperorofMoroccohadhisfavouritekeeperofpigeons,asismentionedinMoore’streatise,published1737。InEngland,fromthetimeofWillughbyin1678tothepresentday,aswellasinGermanyandinFrance,numeroustreatiseshavebeenpublishedonthepigeon。InIndia,aboutahundredyearsago,aPersiantreatisewaswritten;andthewriterthoughtitnolightaffair,forhebeginswithasolemninvocation,"inthenameofGod,thegraciousandmerciful。"Manylargetowns,inEuropeandtheUnitedStates,nowhavetheirsocietiesofdevotedpigeon—fanciers:atpresenttherearethreesuchsocietiesinLondon。InIndia,asIhearfromMr。
  Blyth,theinhabitantsofDelhiandofsomeothergreatcitiesareeagerfanciers。Mr。LayardinformsmethatmostoftheknownbreedsarekeptinCeylon。InChina,accordingtoMr。SwinhoeofAmoy,andDr。LockhartofShangai,Carriers,Fantails,Tumblers,andothervarietiesarerearedwithcare,especiallybythebonzesorpriests。TheChinesefastenakindofwhistletothetail—feathersoftheirpigeons,andastheflockwheelsthroughtheairtheyproduceasweetsound。InEgyptthelateAbbasPachawasagreatfancierofFantails。ManypigeonsarekeptatCairoandConstantinople,andthesehavelatelybeenimportedbynativemerchants,asIhearfromSirW。Elliot,intoSouthernIndia,andsoldathighprices。
  Theforegoingstatementsshowinhowmanycountries,andduringhowlongaperiod,manymenhavebeenpassionatelydevotedtothebreedingofpigeons。
  Hearhowanenthusiasticfancieratthepresentdaywrites:"IfitwerepossiblefornoblemenandgentlementoknowtheamazingamountofsolaceandpleasurederivedfromAlmondTumblers,whentheybegintounderstandtheirproperties,IshouldthinkthatscarceanynoblemanorgentlemanwouldbewithouttheiraviariesofAlmondTumblers。"(6/35。J。M。Eaton’TreatiseontheAlmondTumbler’1851;Prefacepage6。)Thepleasurethustakenisofparamountimportance,asitleadsamateurscarefullytonoteandpreserveeachslightdeviationofstructurewhichstrikestheirfancy。
  Pigeonsareoftencloselyconfinedduringtheirwholelives;theydonotpartakeoftheirnaturallyvarieddiet;theyhaveoftenbeentransportedfromoneclimatetoanother;andallthesechangesintheirconditionsoflifewouldbelikelytocausevariability。Pigeonshavebeendomesticatedfornearly5000years,andhavebeenkeptinmanyplaces,sothatthenumbersrearedunderdomesticationmusthavebeenenormous:andthisisanothercircumstanceofhighimportance,foritobviouslyfavoursthechanceofraremodificationsofstructureoccasionallyappearing。Slightvariationsofallkindswouldalmostcertainlybeobserved,and,ifvalued,would,owingtothefollowingcircumstances,bepreservedandpropagatedwithunusualfacility。Pigeons,differentlyfromanyotherdomesticatedanimal,caneasilybematedforlife,and,thoughkeptwithotherpigeons,rarelyproveunfaithfultoeachother。Evenwhenthemaledoesbreakhismarriage—vow,hedoesnotpermanentlydeserthismate。Ihavebredinthesameaviariesmanypigeonsofdifferentkinds,andneverrearedasinglebirdofanimpurestrain。Henceafanciercanwiththegreatesteaseselectandmatchhisbirds。Hewillalsoseethegoodresultsofhiscare;forpigeonsbreedwithextraordinaryrapidity。Hemayfreelyrejectinferiorbirds,astheyserveatanearlyageasexcellentfood。
  [HISTORYOFTHEPRINCIPALRACESOFTHEPIGEON。(6/36。AsinthefollowingdiscussionIoftenspeakofthepresenttime,Ishouldstatethatthischapterwascompletedintheyear1858。)
  Beforediscussingthemeansandstepsbywhichthechiefraceshavebeenformed,itwillbeadvisabletogivesomehistoricaldetails,formoreisknownofthehistoryofthepigeon,littlethoughthisis,thanofanyotherdomesticatedanimal。Someofthecasesareinterestingasprovinghowlongdomesticvarietiesmaybepropagatedwithexactlythesameornearlythesamecharacters;andothercasesarestillmoreinterestingasshowinghowslowlybutsteadilyraceshavebeengreatlymodifiedduringsuccessivegenerations。InthelastchapterIstatedthatTrumpetersandLaughers,bothsoremarkablefortheirvoices,seemtohavebeenperfectlycharacterisedin1735;andLaugherswereapparentlyknowninIndiabeforetheyear1600。Spotsin1676,andNunsinthetimeofAldrovandi,before1600,werecolouredexactlyastheynoware。CommonTumblersandGroundTumblersdisplayedinIndia,beforetheyear1600,thesameextraordinarypeculiaritiesofflightasatthepresentday,fortheyarewelldescribedinthe’AyeenAkbery。’Thesebreedsmayallhaveexistedforamuchlongerperiod;weknowonlythattheywereperfectlycharacterisedatthedatesabovegiven。TheAVERAGElengthoflifeofthedomesticpigeonisprobablyaboutfiveorsixyears;ifso,someoftheseraceshaveretainedtheircharacterperfectlyforatleastfortyorfiftygenerations。
  POUTERS。
  Thesebirds,asfarasaveryshortdescriptionservesforcomparison,appeartohavebeenwellcharacterisedinAldrovandi’stime(6/37。
  ’Ornithologie’1600volume2page360。),beforetheyear1600。Lengthofbodyandlengthoflegareatthepresenttimethetwochiefpointsofexcellence。In1735Mooresaid(seeMr。J。M。Eaton’sedition)——andMoorewasafirst—ratefancier——thatheoncesawabirdwithabody20inchesinlength,"though17or18inchesisreckonedaverygoodlength;"andhehasseenthelegsverynearly7inchesinlength,yetaleg61/2or63/4long"mustbeallowedtobeaverygoodone。"Mr。Bult,themostsuccessfulbreederofPoutersintheworld,informsmethatatpresent(1858)thestandardlengthofthebodyisnotlessthan18inches;buthehasmeasuredonebird19inchesinlength,andhasheardof20and22inches,butdoubtsthetruthoftheselatterstatements。Thestandardlengthofthelegisnow7inches,butMr。Bulthasrecentlymeasuredtwoofhisownbirdswithlegs71/2long。Sothatinthe123yearswhichhaveelapsedsince1735therehasbeenhardlyanyincreaseinthestandardlengthofthebody;17or18
  incheswasformerlyreckonedaverygoodlength,andnow18inchesistheminimumstandard;butthelengthoflegseemstohaveincreased,asMooreneversawonequite7incheslong;nowthestandardis7,andtwoofMr。
  Bult’sbirdsmeasured71/2inchesinlength。TheextremelyslightimprovementinPouters,exceptinthelengthoftheleg,duringthelast123years,maybepartlyaccountedforbytheneglectwhichtheysuffered,asIaminformedbyMr。Bult,untilwithinthelast20or30years。About1765(6/38。’ATreatiseonDomesticPigeons’dedicatedtoMr。Mayor1765
  Prefacepage14。)therewasachangeoffashion,stouterandmorefeatheredlegsbeingpreferredtothinandnearlynakedlegs。
  FANTAILS。
  ThefirstnoticeoftheexistenceofthisbreedisinIndia,beforetheyear1600,asgiveninthe’AyeenAkbery’(6/39。Mr。Blythhasgivenatranslationofpartofthe’AyeenAkbery’in’AnnalsandMag。ofNat。
  Hist。’volume191847page104。);atthisdate,judgingfromAldrovandi,thebreedwasunknowninEurope。In1677WillughbyspeaksofaFantailwith26tail—feathers;in1735Mooresawonewith36feathers;andin1824MM。
  BoitardandCorbieassertthatinFrancebirdscaneasilybefoundwith42
  tail—feathers。InEngland,thenumberofthetail—feathersisnotatpresentsomuchregardedastheirupwarddirectionandexpansion。Thegeneralcarriageofthebirdislikewisenowmuchvalued。Theolddescriptionsdonotsufficetoshowwhetherintheselatterrespectstherehasbeenmuchimprovement:butifFantailswiththeirheadsandtailstouchinghadformerlyexisted,asatthepresenttime,thefactwouldalmostcertainlyhavebeennoticed。TheFantailswhicharenowfoundinIndiaprobablyshowthestateoftherace,asfarascarriageisconcerned,atthedateoftheirintroductionintoEurope;andsome,saidtohavebeenbroughtfromCalcutta,whichIkeptalive,wereinamarkedmannerinferiortoourexhibitionbirds。TheJavaFantailshowsthesamedifferenceincarriage;andalthoughMr。Swinhoehascounted18and24tail—feathersinhisbirds,afirst—ratespecimensenttomehadonly14tail—feathers。
  JACOBINS。
  Thisbreedexistedbefore1600,butthehood,judgingfromthefiguregivenbyAldrovandi,didnotenclosetheheadnearlysoperfectlyasatpresent:
  norwastheheadthenwhite;norwerethewingsandtailsolong,butthislastcharactermighthavebeenoverlookedbytherudeartist。InMoore’stime,in1735,theJacobinwasconsideredthesmallestkindofpigeon,andthebillissaidtobeveryshort。HenceeithertheJacobin,ortheotherkindswithwhichitwasthencompared,mustsincethattimehavebeenconsiderablymodified;forMoore’sdescription(anditmustberememberedthathewasafirst—ratejudge)isclearlynotapplicable,asfarassizeofbodyandlengthofbeakareconcerned,toourpresentJacobins。In1795,judgingfromBechstein,thebreedhadassumeditspresentcharacter。
  TURBITS。
  Ithasgenerallybeensupposedbytheolderwritersonpigeons,thattheTurbitistheCortbeckofAldrovandi;butifthisbethecase,itisanextraordinaryfactthatthecharacteristicfrillshouldnothavebeennoticed。Thebeak,moreover,oftheCortbeckisdescribedascloselyresemblingthatoftheJacobin,whichshowsachangeintheoneortheotherrace。TheTurbit,withitscharacteristicfrill,andbearingitspresentname,isdescribedbyWillughbyin1677;andthebillissaidtobelikethatofthebullfinch,——agoodcomparison,butnowmorestrictlyapplicabletothebeakoftheBarb。Thesub—breedcalledtheOwlwaswellknowninMoore’stime,in1735。
  TUMBLERS。
  CommonTumblers,aswellasGroundTumblers,perfectasfarastumblingisconcerned,existedinIndiabeforetheyear1600;andatthisperioddiversifiedmodesofflight,suchasflyingatnight,theascenttoagreatheight,andmannerofdescent,seemtohavebeenmuchattendedtoinIndia,asatthepresenttime。Belon(6/40。’L’HistoiredelaNaturedesOiseaux’
  page314。)in1555sawinPaphlagoniawhathedescribesas"averynewthing,viz。pigeonswhichflewsohighintheairthattheywerelosttoview,butreturnedtotheirpigeon—housewithoutseparating。"ThismannerofflightischaracteristicofourpresentTumblers,butitisclearthatBelonwouldhavementionedtheactoftumblingifthepigeonsdescribedbyhimhadtumbled。TumblerswerenotknowninEuropein1600,astheyarenotmentionedbyAldrovandi,whodiscussestheflightofpigeons。TheyarebrieflyalludedtobyWillughby,in1687,assmallpigeons"whichshowlikefootballsintheair。"Theshort—facedracedidnotexistatthisperiod,asWillughbycouldnothaveoverlookedbirdssoremarkablefortheirsmallsizeandshortbeaks。Wecaneventracesomeofthestepsbywhichthisracehasbeenproduced。Moorein1735enumeratescorrectlythechiefpointsofexcellence,butdoesnotgiveanydescriptionoftheseveralsub—breeds;
  andfromthisfactMr。Eatoninfers(6/41。’TreatiseonPigeons’1852page64。)thattheShort—facedTumblerhadnotthencometofullperfection。
  MooreevenspeaksoftheJacobinasbeingthesmallestpigeon。Thirtyyearsafterwards,in1765,intheTreatisededicatedtoMayor,short—facedAlmondTumblersarefullydescribed,buttheauthor,anexcellentfancier,expresslystatesinhisPreface(page14)that,"fromgreatcareandexpenseinbreedingthem,theyhavearrivedtosogreatperfectionandaresodifferentfromwhattheywere20or30yearspast,thatanoldfancierwouldhavecondemnedthemfornootherreasonthanbecausetheyarenotlikewhatusedtobethoughtgoodwhenhewasinthefancybefore。"Henceitwouldappearthattherewasarathersuddenchangeinthecharacteroftheshort—facedTumblerataboutthisperiod;andthereisreasontosuspectthatadwarfedandhalf—monstrousbird,theparent—formoftheseveralshort—facedsub—breeds,thenappeared。Isuspectthisbecauseshort—facedTumblersarebornwiththeirbeaks(ascertainedbycarefulmeasurement)asshort,proportionallywiththesizeoftheirbodies,asintheadultbird;andinthisrespecttheydiffergreatlyfromallotherbreeds,whichslowlyacquireduringgrowththeirvariouscharacteristicqualities。
  Sincetheyear1765therehasbeensomechangeinoneofthechiefcharactersoftheshort—facedTumbler,namely,inthelengthofthebeak。
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