Demography of Northern Fur Seals on the Pribilof Islands (cont.) (pg 1, 2)

Research Reports
Jan-Feb-Mar 2014

Table 1. Annual tag loss from tag transitions (2 tags to 1 tag) for adult female northern fur seals on St. Paul Island.
Tag types and ages	n2	n1	single loss rate	SE	double loss rate	SE
Dalton Superflexitag (DS)-new	103	9	0.042	0.014	0.002	0.001
DS-2nd yr	61	7	0.054	0.020	0.003	0.002
DS-2+ yrs	101	4	0.019	0.010	0.000	0.000
Allflex “narrow” (AN)	83	0	0		0.000
AN w/metal-new	103	0	0
metal w/AN-new	99	5	0.048	0.021	0
AN w/metal-old	239	2	0.008	0.006
metal w/AN-old	239	1	0.004	0.004	0.000	0.000
Allflex large (AL)-old	27	2	0.036	0.025	0.001	0.001
AL w/radio-tag (TX)-new	71	2	0.027	0.019
AL w/TX old	109	0	0

Table 2. Cumulative tag loss after initial tagging as pups, with Dalton Superflexitags (DS), for the 2009 pup cohort on St. George Island.
Tag types and ages	n2	n1	single loss rate	SE	double loss rate	SE
DS(left)-2 yrs	34	29	0.460	0.063
DS(right)-2 yrs	34	15	0.306	0.066	0.141	0.036
DS(left)-3 yrs	61	42	0.408	0.048
DS(right)-3 yrs	61	26	0.299	0.049	0.122	0.025
DS(left)-4 yrs	67	60	0.472	0.044
DS(right)-4 yrs	67	43	0.391	0.047	0.185	0.028

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