species,recovery_date,sex,recorded_mark,tag_code,number_cwt_estimated
"1","20200808",,"9009","637312","2.1"
"1","20191008","M","5000","637312","1"
"1","20201006","M","5000","637312","1"
"1","20201006","F","5000","637312","1"
"1","20201006","F","5000","637312","1"
"1","20201006","M","5000","637312","1"
"1","20200922","M","5000","637312","1"
"1","20200929","M","5000","637312","1"
"1","20201013","M","5000","637312","1"
"1","20201001","M","5000","637312","1"
"1","20200929","M","5000","637312","1"
"1","20200929","M","5000","637312","1"
"1","20200929","M","5000","637312","1"
"1","20200929","M","5000","637312","1"
"1","20200929","M","5000","637312","1"