U.S. Department 

 of Commerce 



Seattle, Washington 



Volume 98 

 Number 1 

 January 2000 



Fishery 

 Bulletin 



J* . 



% 



Contents 



The National Marine Fisheries Ser\^ce 

 iNMFSl does not approve, recommend, 

 or endorse any proprietary product or 

 proprietary material mentioned m this 

 publication- No reference shall be made 

 to NMFS. or to this publication furnished 

 by NMFS. in any advertising or sales 

 promotion which would indicate or imply 

 that NMFS approves, recommends, or 

 endorses any proprietary product or 

 proprietary material mentioned herein, 

 or which has as its purpose an intent to 

 cause directly or indirectly the adver- 

 tised product to be used or purchased 

 because of this NMFS publication. 



Articles 



1-13 Arkhipkin, Alexander I. 



Intrapopulation structure of winter-spawned Argentine shortfin squid, 

 lllex argentinus (Cephalopoda, Ommastrephidae), during its feeding 

 period over the Patagonian Shelf 



14-24 Beacham, Terry D., Khai D. Le, Monique R. Raap, 



Kim Hyatt, Wilf Luedke, and Ruth E. Withler 



Microsatellite DNA variation and estimation of stock composition 

 of sockeye salmon, Oncorhynchus nerka, in Barkley Sound, 

 British Columbia 



25-40 Clear, Naomi P., John S. Gunn, and Anthony J. Rees 



Direct validation of annual increments in the otoliths of juvenile 

 southern bluefin tuna, Thunnus maccoyii, by means of a large-scale 

 mark-recapture experiment with strontium chloride 



41-63 Francis, Malcolm P., and John D. Stevens 



Reproduction, embryonic development, and growth of the 

 porbeagle shark, Lamna nasus, in the southwest Pacific Ocean 



64-74 Govoni, John Jeffrey, Bruce W. Stender, 



and Oleg Pashuk 



Distribution of larval swordfish, Xiphias gladius, and probable 

 spawning off the southeastern United States 



75-85 Hayes, Daniel B. 



A biological reference point based on the Leslie matrix 



86-95 Lenihan, Hunter S., and Fiorenza Micheli 



Biological effects of shellfish harvesting on oyster reefs: resolving a 

 fishery conflict by ecological experimentation 



96-117 Love, Milton S., Jennifer E. Caselle, and Linda Snook 



Fish assemblages around seven oil platforms in the 

 Santa Barbara Channel area 



