season_month,lines_in_water,Humpback_dens_sum,Blue_occur_sum
2013-2014_12,28600,0.08517183,5.764157798
2013-2014_01,65500,0.121804945,5.700191632
2013-2014_02,56300,0.053216762,6.121046312
2013-2014_03,45400,0.40643497,7.372951136
2013-2014_04,34000,2.025287609,5.613144347
2013-2014_05,21100,18.39932771,45.87672031
2013-2014_06,12000,15.96621996,121.7131012
2013-2014_07,11200,14.84032085,260.6026478
2013-2014_08,15700,20.7124733,265.5003202
2013-2014_09,17800,19.55217728,246.1516566
2013-2014_10,NA,16.56338668,243.4219497
2013-2014_11,NA,16.05150319,89.97065068
2014-2015_12,32000,8.888949501,21.51594832
2014-2015_01,68000,3.540048921,15.74168886
2014-2015_02,56200,3.017083404,13.61733586
2014-2015_03,40300,3.77982116,8.290662883
2014-2015_04,24300,4.530335293,7.67087203
2014-2015_05,16000,10.62598027,23.75769498
2014-2015_06,10600,17.39963893,129.6655756
2014-2015_07,7100,11.03749281,268.7648942
2014-2015_08,4500,16.2594038,273.8896811
2014-2015_09,9000,22.11863695,230.2725515
2014-2015_10,NA,27.95626839,207.2001092
2014-2015_11,NA,16.89824842,89.13094678
2015-2016_12,NA,2.450753,18.16989718
2015-2016_01,67600,1.213803259,18.45712878
2015-2016_02,64000,1.634899733,13.08698221
2015-2016_03,49900,1.896036228,11.63923154
2015-2016_04,32100,9.121331878,22.20123886
2015-2016_05,18700,13.60867159,36.09420033
2015-2016_06,11100,21.43825766,173.0110505
2015-2016_07,9300,13.68271549,255.4849439
2015-2016_08,10900,19.1649736,259.4604019
2015-2016_09,8600,15.91375739,239.5384847
2015-2016_10,NA,15.94681438,200.1069163
2015-2016_11,NA,18.05024942,84.9410938
2016-2017_12,NA,2.363307153,7.895889896
2016-2017_01,71200,0.292560893,12.43718832
2016-2017_02,69300,0.19288548,11.8246323
2016-2017_03,51800,0.348780735,6.477454249
2016-2017_04,37200,1.656638858,6.99340247
2016-2017_05,27600,11.32224512,25.63168633
2016-2017_06,12400,18.82375535,149.5929511
2016-2017_07,11300,17.69901653,261.6364737
2016-2017_08,10900,15.48411412,266.5301401
2016-2017_09,8600,17.27391772,238.3842064
2016-2017_10,NA,14.19543187,201.3143473
2016-2017_11,NA,4.862580022,84.85849721
2017-2018_12,NA,1.061329156,7.58431178
2017-2018_01,64500,0.601968908,10.14017499
2017-2018_02,66400,0.287070201,16.62752733
2017-2018_03,56100,0.167035873,7.191703907
2017-2018_04,35900,2.54013675,8.591380681
2017-2018_05,26500,14.76832886,37.25041375
2017-2018_06,15900,17.714022,157.7431314
2017-2018_07,10800,15.57339447,255.2494523
2017-2018_08,12400,18.75057962,259.1768655
2017-2018_09,11300,17.89409052,242.4473912
2017-2018_10,NA,16.57815041,200.7691033
2017-2018_11,NA,8.933201894,80.20856664
2018-2019_12,NA,1.725713898,10.5686928
2018-2019_01,68700,1.060376771,14.06544958
2018-2019_02,63600,0.176319111,9.308564636
2018-2019_03,48900,0.464312103,7.306646102
2018-2019_04,28500,2.744396059,12.3339353
2018-2019_05,23200,13.78496266,27.70576866
2018-2019_06,14600,18.36774124,123.7160671
2018-2019_07,8940,8.474907603,271.2029805
2018-2019_08,8540,8.276520907,273.5369362
2018-2019_09,7140,8.411645295,248.035556
2018-2019_10,NA,16.45446468,165.679286
2018-2019_11,NA,3.543339437,24.0438621
2019-2020_12,4000,0.659383568,10.53809532
2019-2020_01,58400,0.489984625,9.736273852
2019-2020_02,59500,0.187698292,5.829827088
2019-2020_03,45500,0.089413267,5.439454834
2019-2020_04,24400,1.675460776,21.6822347
2019-2020_05,11580,17.38524268,64.25080587
2019-2020_06,9660,19.13361651,228.9500154
2019-2020_07,7080,17.60685399,273.0784579
2019-2020_08,6880,15.14554711,249.0691715
2019-2020_09,5160,20.68994294,253.2924642