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- W4237610926 abstract "Population studies are concerned with the numbers of living organisms, and the factors controlling these numbers. Out of the vast range of organisms in the sea the only populations which have so far been studied in detail in this way are at the extreme ends of the food cycle—the phytoplankton (and to a much lesser extent the smaller zooplankton), and the larger fishes exploited by man. While the concentration of attention on to the commercial species and sizes of fish and whales is due in part to the importance of such studies in the field of conservations and fisheries regulations, another important reason is the much greater extent of data available. Studies of other marine populations depend on information gained at considerable trouble and expense from research vessels. For every research vessel (with time for population studies often strictly limited) there are a hundred fishing boats (all fishing full time), whose catches can fairly easily be examined to give information on the size and ages of the fish caught as well as the total quantities of each species. In addition the rough position and the amount of fishing required to obtain the catch will usually be known." @default.
- W4237610926 created "2022-05-12" @default.
- W4237610926 date "1962-01-30" @default.
- W4237610926 modified "2023-10-18" @default.
- W4237610926 title "Population studies" @default.
- W4237610926 doi "https://doi.org/10.1098/rspa.1962.0021" @default.
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