152 
Fishery Bulletin 1 10(2) 
Table 2 
Photographic resighting date and location data of Gulf of Alaska (GOA) transient killer whales ( Orcinus orca ) in coastal south- 
eastern Alaska (SEA) and British Columbia (BC). 
Year 
Month 
Day 
Region 
Location 
Latitude 
N 
Longitude 
W 
GOA whales identified 
1995 
3 
24 
SEA 
Sitka Sound 
56°58' 
135°33' 
AT74 
1997 
11 
5 
SEA 
Sitka Sound 
57°0' 
135°20' 
AT70 AT71 AT72 AT73 AT73A AT75 
1997 
2 
4 
SEA 
Sitka Sound 
56°58' 
135°33' 
AT74 
1997 
1 
9 
SEA 
Sitka Sound 
56°58' 
135°33' 
AT74 
1998 
7 
19 
SEA 
Glacier Bay 
58°28' 
136°!' 
AT30 AT32 
2000 
3 
10 
SEA 
Sitka Sound 
57°6' 
135°28' 
AT70 AT71 AT72 AT73 AT75 AT80 
2000 
4 
4 
SEA 
Sitka Sound 
57°1' 
135°21' 
AT72 AT70 AT71 AT75 AT73 AT80 
2001 
6 
5 
SEA 
Glacier Bay 
58°28' 
i36°r 
AT30 ATS 2 AT74 AT74A 
2001 
7 
23 
BC 
Skaat Harbor 
52°24' 
131°26' 
AT30 AT32 
2002 
2 
24 
SEA 
Sitka Sound 
57°7' 
135°31' 
AT70 AT71 AT72 AT73 AT75 AT80 
2003 
2 
28 
SEA 
Sitka Sound 
56°55' 
135°39' 
AT74 AT74A 
2003 
3 
2 
SEA 
Sitka Sound 
56°55' 
135°39' 
AT74 AT74A 
2004 
5 
16 
BC 
Hecate Strait 
53°54' 
131°0' 
AT74 AT74A 
2007 
2 
7 
SEA 
Sea Lion Rock 
57°17' 
135°57' 
AT70 AT71 AT75 
2007 
2 
19 
SEA 
Yasha Island 
56°57' 
135°35' 
AT74 AT74A 
2007 
7 
19 
SEA 
Glacier Bay 
58°34' 
136°6' 
AT141, AT142, AT143 
Table 3 
Summary of attachment and movement data for satellite tags placed on Gulf of Alaska (GOA) and ATI transient killer whales 
( Orcinus orca) 
Population 
Whale 
First transmission 
date 
Last transmission 
date 
Duration 
(days) 
Distance 
(km) 
Range 
(km 2 ) 
GOA 
AT109 
7/4/2007 
7/20/2007 
17 
1528 
18415 
GOA 
AT73 
9/20/2008 
10/19/2008 
30 
3839 
270503 
GOA 
AT122 
6/12/2010 
7/1/2010 
19 
1115 
36222 
GOA 
AT73 
9/21/2010 
9/27/2010 
7 
625 
2615 
ATI 
AT9 
8/17/2010 
8/22/2010 
5 
473 
3982 
for the GOA transients, whereas the ATI transients 
were regularly encountered well inside Prince William 
Sound and Kenai Fjords, including glacial fjords headed 
by active glaciers (Fig. IB). 
Our trend analysis revealed an abrupt decline in the 
abundance of the ATI transient population after the 
Exxon Valdez oil spill in 1989, corroborating earlier 
interpretations of photo-identification data (Matkin et 
ah, 2008). This decline in abundance correlates with 
a spike of lower apparent survival from 1989 through 
1990 and is almost certainly due to mortality, as sup- 
ported by the low estimated rates of temporary emigra- 
tion, high capture probabilities, and the lack of evidence 
of movement into other areas (Matkin et ah, 1999, 
2008). The ATI population is currently exceptionally 
small at seven individuals, and the lack of recruitment 
since 1984 indicates their eventual extinction. Although 
the ATI population appears to be a remnant group of 
predators of near-coastal harbor seal (Phoca vitulina) 
and Dali’s porpoise (Phocoenoides dalli) (Saulitis et ah, 
2000, 2005), their descent toward extinction was com- 
pounded by mortality after the oil spill. Additionally, 
harbor seals, a primary prey for ATI killer whales, 
have declined substantially in our study area during 
the study period (Frost et ah, 1999; Allen and Angliss, 
2010 ). 
There was no detectable decline in the GOA tran- 
sient abundance over the period of study. As occasional 
visitors to the Prince William Sound-Kenai Fjords 
region, and because of their more extensive range (as 
supported by tagging data, Fig. 7A), they have likely 
been less affected by local changes to habitat and prey. 
Moreover, the documented prey items of GOA transients 
are notably different from those of the ATI transients 
and include Steller sea lion ( Eumetopias jubatus) (Sau- 
litis et ah, 2000; Heise et ah, 2003; Maniscalco et ah, 
