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All of the others depend on krill as their main food supply. 

 Krill are of central importance in the food web. Fluctuations 

 in the size of krill populations will be reflected in the 

 populations of its predators. In turn, fluctuations in the 

 populations of predators, as exemplified by changes in whale 

 populations, will affect the abundance of krill. 



At the other end of the food chain, diatoms are abundant 

 south of the Convergence and there is a limited amount of 

 benthic macro-algae. There is no apparent interest in har- 

 vesting marine plants in the Antarctic at present. 



An ecosystem perspective on Antarctic marine living re- 

 sources is feasible. Interrelationships among species have 

 been identified and can be taken into account. Quantitative 

 information is still required for most stocks and many preda- 

 tion rates, but the structure of the ecosystem is known. 



J. No Native Peoples 



There are no indigenous human populations residing or 

 using resources south of the Antarctic Convergence. 



