Documentation for computer programs used to produce simulated length distributions for spinner dolphin populations
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The computer programs described in this document form part of an effort to arrive at an estimate of crude birth rate for dolphin stocks through the use of aerial photography. Existing techniques allow the estimation of object sizes from photographs with great accuracy. These tehniques can be applied to aerial photographs of dolphin schools, allowing the generation of corresponding length distributions for the photographed schools. Needed for an estimate of crude birth rate is a good estimate of the relative abundance of animals less than one year old in the population. If the relationship between age and length is known, or a reasonable estimate is available, the length frequency distribution generated from photographs may be used to estimate the crude birth rate. 1983 Spinner dolphin NMFS (National Marine Fisheries Service) SWFSC (Southwest Fisheries Science Center) Library Public Domain 1930
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NOAA
创建时间：
2021-10-04
