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THE WHALE POPULATIONSTHEIR HISTORY AND PRESENT SIZE
METHOD OF ESTIMATING POPULATIONS AND VITAL
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abundance age at maturity age at recruitment age distribution Allen Antarctic areas ASDIC baleen whales blue whales bowhead whales Bryde's whale catch limits changes coastal Committee of Three component curve density dependent determining effect effort errors exploited population Figure fin whales fisheries gray whale harem humpback whales increase International Whaling Commission Krill management procedure mature females maximum methods migrations minke whales MSY level natural mortality rate North Atlantic North Pacific number of animals number of recruits number of whales observed obtained ocean Ohsumi original pelagic permitted catch population estimates population level population model possible pregnancy rate present probably problems proportion quotas ratio recent reduced relative replacement yield right whales Scientific Committee season sexes socially mature males southern hemisphere species of whales sperm whales stability structure sustainable yield taken unexploited level vessels vital parameters whale models whale populations whale stocks whales caught whaling operations