Matkin et aL; Association patterns of Orcinus orca 



907 



20 i 



30 

 40 

 50 

 60 

 70 

 80 

 90 

 100 



BQ2B29B25B46B39B30B31B38B32B47B33B42 



563 



12 -23 



427 -10 



1161 



•52 



65 

 238 



AB329 



■36 



-44 

 31 



17 

 742 



■34 



-41 

 -12 



6 



372 



AB30 



AB339 



AB42('88) 



-22 

 -28 

 -19 



-29 



-2 



496 



-45 

 27 

 -9 

 12 



-10 

 14 

 42 



591 



AB47 ('92) 



-16 



-56 



-42 



-76 



-51 



2 



-2 



-54 



lllg 



AB02d 



••AB259 AB3,19 



10 



-65 



-75 

 -68 



-72 



76 



244 



AB29C5 



-19 

 -65 

 ^1 



-72 



-47 



8 



9 



-53 



37 



25 



979 



AB38 ('87) 

 AB399('87) AB46 ('92) AB51 Cgfi) 



-10 B02 



74 B29 



35 B25 



• B46 

 -43 B39 



26 B30 



46 B31 



-39 B38 



25 B32 



• B47 

 22 B33 



181 B42 



Figure 3 



Top: dendrogram illustrating intrapod groups and relationships among individuals with 

 CAI values calculated at the population level. ( Relationships among intrapod groups shown 

 in Fig. 2.) Middle: matrix showing CAI values between pairs of individuals calculated at 

 the pod level for AB pod, AB25 subpod. Numbers at the base of each column in the matrix 

 are the number of valid photo sequences in which that individual appears. Bottom: in- 

 ferred genealogical trees. 



On the basis of lack of linkage in the PCC dendro- 

 grams above the zero level, AB pod was divided into 

 three subpods (ABIO, AB17, AB25), although prior 

 to 1994, direct field observations indicated that these 

 .subpods very rarely traveled separately. However, 

 even when traveling together, the subpods typically 

 traveled as cohesive units within the pod. Since 1994, 



direct observation has indicated that the AB25 sub- 

 pod has split off and travels mainly with AJ pod. 

 Other than those established for AB pod, no other 

 subpods were identified in the study. 



To explain association patterns within intrapod 

 groups, we postulated that these represented matri- 

 lineal groups and that genealogical relationships 



