▁out ▁of ▁fear ▁that ▁she ▁would ▁eventually ▁choose ▁to ▁leave ▁her ▁scientific ▁career ▁in ▁order ▁to ▁focus ▁on ▁raising ▁children . ▁Und a unted , ▁Clark ▁went ▁on ▁to ▁ear n ▁both ▁a ▁Master ▁of ▁Arts ▁( 1 9 4 6 ) ▁and ▁Doctor ate ▁of ▁Philosoph y ▁( 1 9 5 0 ) ▁from ▁New ▁York ▁University . ▁During ▁her ▁years ▁of ▁gradu ate ▁study , ▁Clark ▁carried ▁out ▁research ▁at ▁the ▁S cri pp s ▁Institution ▁of ▁Ocean ography ▁in ▁La ▁J ol la , ▁the ▁American ▁Museum ▁of ▁Natural ▁History ▁in ▁New ▁York , ▁the ▁Wood s ▁H ole ▁Marine ▁Bi ological ▁Labor atory ▁in ▁Massachusetts , ▁and ▁at ▁the ▁L erner ▁Marine ▁Labor atory ▁in ▁B im ini . ▁ ▁In ▁ 1 9 4 9 , ▁under ▁an ▁Office ▁of ▁Naval ▁Research ▁program ▁to ▁undert ake ▁scientific ▁research ▁in ▁Mic ron esia , ▁Clark ▁carried ▁out ▁fish ▁population ▁studies ▁in ▁Gu am , ▁the ▁Marshall ▁Islands , ▁the ▁Pal au ▁islands , ▁the ▁Northern ▁Mar iana ▁Islands , ▁and ▁the ▁Caroline ▁Islands . ▁After ▁comple ting ▁doctor al ▁research , ▁Clark ▁received ▁a ▁Ful br ight ▁Sch olar ship ▁to ▁purs ue ▁ich thy ological ▁studies ▁at ▁the ▁Marine ▁Bi ological ▁Station ▁in ▁H urg h ada , ▁on ▁the ▁northern ▁Red ▁Sea ▁Coast ▁of ▁Egypt . ▁These ▁experiences ▁were ▁discussed ▁in ▁Clark ' s ▁first ▁book , ▁Lady ▁with ▁a ▁Spe ar ▁( 1 9 5 3 ), ▁the ▁writing ▁of ▁which ▁was ▁supported ▁in ▁part ▁by