OCEANIC PRODUCTION 



Marine Mammals — Oceanographic strated. Analysis of the accumulating population studies on mammals such 



conditions apparently have a strong data on ocean conditions can give as the northern fur seal that spends 



influence on the survival of marine a much better understanding of the many months at sea. Reasons for the 



mammals, particularly during their ecology of marine mammals than now great variation in survival of year 



first year. However, satisfactory cor- exists. Unless this can be done an classes cannot be found in the land 



relations have not yet been demon- impasse may have been reached in environment. 



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