536 



ECOLOGY AND BEHAVIOR 



NEWCASTLE cyo 18 



N.S.W. 



TAGGING SITE 

 • RECOVERY SITE 



Figure 4 Tagging and recapture sites and proposed migra- 

 tory routes of//, portusjacksoni. 



waters, for the sharks are rarely caught by longline, and few are seen with 

 scuba, in waters less than 60 m or closer than about 25 km from the coast 

 before the August/September influx of female sharks towards the coastal 

 breeding grounds (McLaughlin and O'Gower 1971). The proposed migra- 

 tory route for H. portusjacksoni is given in Figure 4; this route is not in- 

 consistent with the movement of the warm and cold water masses along the 

 eastern seabord and Bass Strait (Rochford 1974), especially if Springer's 

 (1963) correlations between shark movements and water temperature ap- 

 ply to H. portusjacksoni. 



