Growth, maturity, reproduction, and life expectancy in ex-situ pacific walruses (Odobenus rosmarus divergens)

BMC Zoology

Table 1 Details of female walruses and their contribution to data within this research

ID	Facility	DOB (m/d/y)	Wild (W) Captive (CB)	Growth data (age range [y], n)	Progesterone (age range [y], n)	Ovulations^a	Pregnancies
1	KSW	5/01/1983	W	0 to 21, 186	16 to 17, 6	5	4
2	KSW	5/03/2000	CB	0 to 16, 317	7 to 16, 21	4	4
3	KSW	5/20/2007	CB	0 to 9, 133	5 to 11, 14	2	2
4	KSW	5/05/2010	CB	0 to 9, 274	6 to 8, 6	1	0
5	KSW	5/01/2016	CB	0 to 3, 111
6	SEAS	5/01/1968	W		17 to 21, 13	2	1
7	SEAS	5/17/1974	W	0 to 2, 75
8	SEAS	5/01/1978	W	0 to 1, 33
9	SEAS	5/01/1978	W	0 to 38, 559	12 to 36, 36	3	1
10	SEAS	5/01/1978	W	0 to 41, 899	8 to 40, 67	5	0
11	SEAS	5/01/1978	W	0 to 2, 68
12	SEAS	4/21/1981	W		12, 6	1	1
13	SEAS	5/15/1981	W		8 to 29, 43	9	4
14	SEAS	6/01/1983	W	24 to 25, 38		2	2
15	SEAS	6/22/1987	CB	10 to 28, 856	4 to 29, 26	7	5
16	SEAS	5/01/1994	CB
17	SEAS	5/01/2003	CB	0 to 16, 1223	8 to 16,21	3	2
18	SEAS	6/03/2017	CB	0 to 2, 248
19	SEAS	7/03/2019	CB	0 to 0.2, 22

Facility KSW Kamogawa Sea World, SEAS SeaWorld Parks, DOB date of birth
^aOvulations = represents total number of pregnancies and false pregnancies where blood samples for progesterone were collected with sufficient frequency to define the event. Note this does not represent all of the potential ovulations and false pregnancies that may have occurred within each animals’ reproductive history because in some years no serum was available for retrospective hormone analysis and/or sample were not collected frequently enough throughout the year to detect an ovulation

ISSN: 2056-3132