Aerial low-frequency hearing in captive and free-ranging harbour seals (Phoca vitulina) measured using auditory brainstem responses

Table 1 Location and date of auditory measurements and information on subjects tested

Test environment	Location	Date	Subject	Sex	Age class	Age (years)^a
Laboratory	Zoo Duisburg, GER	16.02.2013	Db01	Female	Adult	25
		16.02.2013	Db02	Male	Adult	28
		16.02.2013	Db03	Female	Subadult	1
		16.02.2013	Db04	Female	Adult	40
		16.02.2013	Db05	Male	Adult	25
	Tierpark Nordhorn, GER	18.02.2013	Nh01	Female	Adult	17
		18.02.2013	Nh02	Male	Subadult	1.5
		18.02.2013	Nh03	Male	Adult	33
		18.02.2013	Nh04	Female	Adult	27
		18.02.2013	Nh05	Male	Subadult	0.5
Free-ranging	The Wash, UK	22.01.2012	73279	Male	Juvenile	^b
		22.01.2012	73280	Male	Juvenile	2
		23.01.2012	73282	Female	Adult	8
		23.01.2012	73283	Male	Adult	6.5
		23.01.2012	73286	Female	Adult	^b
		23.01.2012	73287	Female	Adult	11.5
		24.01.2012	73288	Male	Adult	10.5
		24.01.2012	73290	Male	Adult	17
		24.01.2012	73291	Male	Adult	12
		24.01.2012	73292	Male	Adult	23
		24.01.2012	73293	Male	Adult	^b
		24.01.2012	73294	Male	Adult	8.5
		25.01.2012	73296	Female	Adult	10.5
		25.01.2012	73297	Male	Adult	7
		25.01.2012	73295	Female	Adult	20.5
		25.01.2012	73298	Male	Adult	6
		25.01.2012	73299	Female	Adult	6.5
		25.01.2012	73300	Male	Adult	4