914 



Fishery Bulletin 97(4), 1999 



AKOld 



20 

 30 

 40 

 50 

 60 

 70 

 80 

 90 

 100 



K02 



K13 KIO K09 K05 



7: 



75 



54 

 61 

 M5 



51 



47 



36 



470 



KM 



2V 

 21 

 13 

 21 

 21 

 667 



K03 



17 

 .34 

 12 

 7 



23 



16 



44S 



K06 



-81 

 .1)3 

 -94 

 ■86 

 -65 

 -75 

 -58 

 944 



AK069 



Kll 



-82 



-«7 

 -85 



•74 

 46 

 308 



K08 



-K2 

 -92 

 -85 

 -86 

 -66 

 -60 

 -66 

 34 

 18 

 586 



AK07O 



I 

 AK12 ('93)9 



AK08 CSS) 



AK11 ^■9^) 



AK03<? 



AK02'; 

 1_ 



KO? 



-73 



•83 



-78 

 -67 

 -68 

 -61 

 29 

 •12 



Kll 



-92 



-92 

 -88 



■90 

 ■3 

 ■10 



2 



57 

 208 



KOI 



-56 



-87 



-76 



-71 



-56 



-13 



-38 



20 



-6 



10 



11 



■5 



619 



K02 

 K13 

 KIO 

 K09 

 K05 

 KM 

 K03 

 K06 

 Kll 

 K08 

 K07 

 KU 

 KOI 



AK64d 



AK05 AK09C86)9 AK10C90)9 AK13C94)V 



Figure 10 



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 AK pod. Numbers at the base of each column in the matrix are the number 

 of valid photo sequences in which that individual appears. Bottom; inferred genealogical 

 trees. 



occasionally traveled with other adult or juvenile 

 males or traveled independently, particularly dui'- 

 ing the multipod encounters observed in July and 

 August (Matkin et al., 1997). In two cases, pairs of 

 males were more highly associated with each other 

 than with any other intrapod groups. 



We witnessed the splitting of one pod (AN pod into 

 ANIO and AN20 pods) during the course of the study. 

 This was not a gradual occurrence, as suggested by 



Bigg et al. ( 1990) for A04, COl, and DOl pods in Brit- 

 ish Columbia but appeared to be a rather abrupt 

 event around 1989. The pod split along intrapod 

 (matrilineal) groups, while all 13 of the intrapod 

 groups in the two pods remained intact. AN pod num- 

 bered 35 whales at the time it split and was the larg- 

 est pod in the study at that time. 



Bigg et al. ( 1990) defined subpods as fragments of 

 pods that occasionally split and traveled separately 



