两种语言
发表于 2025-3-30 11:26:15
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Infantry
发表于 2025-3-30 13:08:22
Absolute Population Estimates using Marking Techniques,may be estimated (Le Cren, 1965). This was based on the principle that if a proportion of the population was marked in some way, returned to the original population and then, after complete mixing, a second sample was taken, the number of marked individuals in the second sample would have the same r
Admire
发表于 2025-3-30 17:08:24
,Absolute Population Estimates by Sampling a Unit of Habitat — Air, Plants, Plant Products and Verteilizing marked individuals (p. 70) and removal trapping (p. 230). In this approach the habitat is sampled and the contained animals along with it. Hence two separate measurements have to be made: the total number of animals in the unit of the habitat sampled and the total number of these units in th