Table 1. Summary of the survey effort (km) for each year and season in south and southeast Brazil between 2009 and 2014.

		Area
Survey (year)	Season	South	Southeast	Total (km)	Starting date (day/month)	N days
1 (2009)	Spring	1267.6	1028.2	2295.7	22/10	15
2 (2010)	Autumn	1688.8	488.6	2177.4	22/04	22
3 (2010)	Spring	1543.0	1969.5	3512.5	20/10	31
4 (2011)	Autumn	1786.8	1678.2	3465.1	13/04	29
5 (2012)	Spring	1827.6	1443.9	3271.5	26/10	29
6 (2013)	Autumn	1786.5	1347.6	3134.1	07/05	34
7 (2014)	Autumn	1375.4	925.2	2300.6	10/05	30
8 (2014)	Spring	1604.6	881.7	2486.3	12/11	30
Total		12880.4	9762.8	22643.2		220

Starting date, day which the survey started; N days, duration of each survey in days. Effort considered only with sea state ≤ 5 of Beaufort scale